Pumps - Milton Roy
Industrial pumps move liquids from one place to another, whether you’re handling water, chemicals, or thick, heavy fluids. Most pumps fall into one of two main categories: positive-displacement pumps and cen...
Categories from Milton Roy (4)
Motor Driven Metering Pumps
Motor-driven metering pumps deliver precise, reliable chemical dosing for demanding industrial applications, combining high flow capacity with consistent accuracy. Ideal for water treatment, chemical processing, and manufacturing, these pumps offer adjustable stroke length and motor speed to handle a wide range of fluid viscosities and pressures. Their robust construction ensures long-term durability, while optional features like integrated controllers and safety valves enhance process control and system protection.
Pump Parts & Servicing
Pump Parts & Servicing products involves the maintenance, repair, and replacement of key pump components to ensure optimal performance and longevity. Regular servicing helps prevent breakdowns, reduces downtime, and extends the life of pumps in various industrial applications. It provides efficient operation, minimizes costly repairs, and maintains consistent fluid handling performance.
Pump Repair
Centro carries a complete selection of pump repair products available to purchase online. We have everything you need to keep your pumps in top working condition, including gaskets, o-rings, seals, and more. We also offer a wide variety of pump maintenance and repair services, so you can rest assured that your equipment will always be in great shape. Whether you need a simple tune-up or a complete overhaul, our team of experts is here to help. Learn more about the expertise of our Pump and Seal Division.
Electric Motors
Electric motors for pump control system applications deliver reliable, energy-efficient performance in demanding industrial environments, powering centrifugal, positive displacement, and specialty pumps with precision and durability. Engineered for continuous-duty operation, these motors are available in TEFC, explosion-proof, and washdown enclosures to meet environmental and safety requirements. Paired with VFDs or soft starters, they enable accurate flow regulation, reduced energy consumption, and seamless integration into automated control systems across industries such as water treatment, chemical processing, and manufacturing.
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This PrimeRoyal® R liquid end (23-25) covers 25 mm plunger diameter in the high-pressure packed-plunger configuration. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$79,622.38
Available for Purchase
Subject to factory lead times
The 23-28 is a PrimeRoyal® Q packed-plunger liquid end for 28 mm plunger diameter service. The packed-plunger design excels at high-pressure chemical injection in oil & gas, refinery, and specialty chemical applications where diaphragm designs may be limited by pressure or temperature. P4 head design accommodates plunger diameters from 20 to 32 mm. Check valve options include single-ball, double-ball, flat valve, hard ball-and-seat (LD), slurry, H₂SO₄, viscous, and anti-siphon configurations. Wetted O-ring material is selected between PTFE, Viton, or Nitrile. Connection options and capacity control add-ons are priced separately.
$77,069.51$79,138.00
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-29 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 29 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$94,104.53
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-30 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 30 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
The 23-31 is a PrimeRoyal® R packed-plunger liquid end for 31 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
The 23-32 is a PrimeRoyal® R packed-plunger liquid end for 32 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$80,939.12
Available for Purchase
Subject to factory lead times
The 23-33 is a PrimeRoyal® R packed-plunger liquid end for 33 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-35 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 35 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$94,104.53
Available for Purchase
Subject to factory lead times
The 23-37 is a PrimeRoyal® R packed-plunger liquid end for 37 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$94,104.53
Available for Purchase
Subject to factory lead times
The 23-38 is a PrimeRoyal® R packed-plunger liquid end for 38 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-42 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 42 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-47 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 47 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
The 31-102 is a PrimeRoyal® R packed-plunger liquid end for 101.6 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$22,851.28
Available for Purchase
Subject to factory lead times
Manufactured in France, the 31-127 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 127 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$32,911.48
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (31-152) covers 152.4 mm plunger diameter in the high-pressure packed-plunger configuration. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$35,827.99
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (31-178) covers 177.8 mm plunger diameter in the high-pressure packed-plunger configuration. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$63,940.15
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-32) is configured with a 32 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$12,852.95
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-38) is configured with a 38 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$170.00
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-45) is configured with a 45 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$14,095.64
Available for Purchase
Subject to factory lead times
Built for critical process injection, the 31-51 (PrimeRoyal® K) uses a 51 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$14,509.54
Available for Purchase
Subject to factory lead times
The 31-57 is a PrimeRoyal® K GSD-type diaphragm liquid end with a 57 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$43.05
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-63) is configured with a 63 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$15,340.36
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-70) is configured with a 70 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$44,027.71
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-80) is configured with a 80 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$44,672.89
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (23-25) covers 25 mm plunger diameter in the high-pressure packed-plunger configuration. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$79,622.38
Available for Purchase
Subject to factory lead times
The 23-28 is a PrimeRoyal® Q packed-plunger liquid end for 28 mm plunger diameter service. The packed-plunger design excels at high-pressure chemical injection in oil & gas, refinery, and specialty chemical applications where diaphragm designs may be limited by pressure or temperature. P4 head design accommodates plunger diameters from 20 to 32 mm. Check valve options include single-ball, double-ball, flat valve, hard ball-and-seat (LD), slurry, H₂SO₄, viscous, and anti-siphon configurations. Wetted O-ring material is selected between PTFE, Viton, or Nitrile. Connection options and capacity control add-ons are priced separately.
$77,069.51$79,138.00
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-29 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 29 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$94,104.53
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-30 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 30 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
The 23-31 is a PrimeRoyal® R packed-plunger liquid end for 31 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
The 23-32 is a PrimeRoyal® R packed-plunger liquid end for 32 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$80,939.12
Available for Purchase
Subject to factory lead times
The 23-33 is a PrimeRoyal® R packed-plunger liquid end for 33 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-35 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 35 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$94,104.53
Available for Purchase
Subject to factory lead times
The 23-37 is a PrimeRoyal® R packed-plunger liquid end for 37 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$94,104.53
Available for Purchase
Subject to factory lead times
The 23-38 is a PrimeRoyal® R packed-plunger liquid end for 38 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-42 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 42 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
Manufactured in France, the 23-47 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 47 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$201,627.05
Available for Purchase
Subject to factory lead times
The 31-102 is a PrimeRoyal® R packed-plunger liquid end for 101.6 mm plunger service, manufactured in France. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$22,851.28
Available for Purchase
Subject to factory lead times
Manufactured in France, the 31-127 (PrimeRoyal® R) is a large-bore packed-plunger liquid end designed for 127 mm plunger diameter. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$32,911.48
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (31-152) covers 152.4 mm plunger diameter in the high-pressure packed-plunger configuration. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$35,827.99
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (31-178) covers 177.8 mm plunger diameter in the high-pressure packed-plunger configuration. The PrimeRoyal R excels in oil & gas injection, pipeline dosing, and petrochemical service where very high pressures and large flow volumes are required. Metallic construction throughout ensures long service life in aggressive process environments. Check valve, connection type, capacity control, and motor options are selected separately to complete the configuration for the specific application. RPM maintenance kits are available to cover all scheduled-interval service requirements.
$63,940.15
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-32) is configured with a 32 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$12,852.95
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-38) is configured with a 38 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$170.00
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-45) is configured with a 45 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$14,095.64
Available for Purchase
Subject to factory lead times
Built for critical process injection, the 31-51 (PrimeRoyal® K) uses a 51 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$14,509.54
Available for Purchase
Subject to factory lead times
The 31-57 is a PrimeRoyal® K GSD-type diaphragm liquid end with a 57 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$43.05
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-63) is configured with a 63 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$15,340.36
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-70) is configured with a 70 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$44,027.71
Available for Purchase
Subject to factory lead times
This PrimeRoyal® K liquid end (31-80) is configured with a 80 mm plunger in 316L stainless steel. The PTFE/NBR GSD diaphragm provides full process isolation while handling the pressure cycles of high-duty metering service. Check valve styles — single ball, double ball, hard 440C, slurry, and viscous-liquid spring-loaded — are selected at order time to match fluid characteristics. Suction and discharge connections are available in threaded standard, ANSI Class 150, 300, 600, or 1500 flanges in 316L SS or Alloy 20. Base price covers the liquid end body; gear set, motor mount, capacity control, and oil options are priced separately.
$44,672.89
Available for Purchase
Subject to factory lead times
FAQS
- Flow (GPM) + total dynamic head (TDH), fluid details (chemistry, temp, solids/viscosity), suction conditions (NPSHa), desired materials, seal type, driver/voltage, connection sizes, and duty cycle.
- The total head the pump must overcome: static lift + discharge head + pressure requirements + friction losses in pipe/fittings/valves/filters, adjusted for fluid density.
- Centrifugal for higher flow/low–moderate viscosity and smoother operation; positive displacement for high viscosity, accurate metering, higher pressures, or when flow must stay steady as pressure changes.
- ANSI process pumps are for clean/process fluids and standard chemical-duty applications; self-priming trash pumps are built to handle air entrainment and larger solids for dewatering/wastewater.
- Match wetted materials to the fluid chemistry, temperature, and abrasiveness (e.g., 316 SS for corrosion resistance; ductile iron for general service; hardened materials/coatings for abrasion).
- Often yes on the discharge side to control flow (within limits), but avoid deadheading too long (heat buildup); never throttle suction, use a valve only for isolation.
- VFD speed control is usually most efficient; throttling works but wastes energy; bypass recirculation may be needed to maintain minimum flow.
- Use viscosity-corrected curves or consider positive displacement; expect reduced flow/increased power and ensure suction piping supports high-viscosity feeding.
- Define solids size, concentration, hardness, and shape; choose solids-handling hydraulics, slower speeds, abrasion-resistant materials, and appropriate clearances.
- Select compatible metallurgy/coatings, control pH/chemistry, reduce velocity in corrosive service, manage solids, and use wear parts designed for abrasion.
- Alignment, lubrication, seal support/flush checks, strainer cleaning, vibration/temperature monitoring, and verifying operation near BEP and above minimum flow.
- Best Efficiency Point is where the pump runs most efficiently with lowest vibration; aim to operate near BEP to improve seal/bearing life and reduce energy cost.