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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Order code PKN covers a specialized factory service or configuration for PrimeRoyal metering pumps. Covers: Option for Single diaphragm: diaphragm in PEEK, seal o-rings in nitril. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$39.53
Available for Purchase
Subject to factory lead times
Factory service option PMZ for PrimeRoyal pump systems. Covers: Factory Field Service – For STI actuators: same as PM + air failure lock up system: last position / air failure lock up system: return to 0% or 100%. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$9,371.60
Available for Purchase
Subject to factory lead times
Factory service option PON for PrimeRoyal pump systems. Covers: Option for Double diaphragm: intermediate diaphragm in POM, seal o-rings in nitril. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$39.53
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP41-40) covers 40 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.
$118,439.93
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP43-28) covers 28 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.
$116,227.43
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP43-32) covers 32 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.
$117,331.14
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP43-36) covers 36 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.
$118,439.93
Available for Purchase
Subject to factory lead times
The RPM130 is a scheduled-maintenance kit for the Milroyal D liquid end. Includes the diaphragm or oil seal, O-rings, and check-valve components specific to this liquid end material and size. Rebuild kits simplify planned maintenance and keep the pump at its rated accuracy and pressure capability. Check the RPM kit chart to confirm the correct kit number for your liquid end material code and plunger diameter.
$1,393.53
Available for Purchase
Subject to factory lead times
The RPM54773 maintenance kit covers the consumable components in a PROTEUS™ liquid end. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$546.18
Available for Purchase
Subject to factory lead times
The RPM54774 maintenance kit covers the consumable components in a PROTEUS™ liquid end. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$526.44
Available for Purchase
Subject to factory lead times
The RPM54776 is a scheduled-maintenance kit for PROTEUS™ liquid ends. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$1,132.95
Available for Purchase
Subject to factory lead times
The RPM54782 maintenance kit covers the consumable components in a PROTEUS™ liquid end. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$314.77
Available for Purchase
Subject to factory lead times
The TT0060 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$172.45
Available for Purchase
Subject to factory lead times
The TT0100 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$182.60
Available for Purchase
Subject to factory lead times
The TT0250 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$200.86
Available for Purchase
Subject to factory lead times
The TT0500 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$226.22
Available for Purchase
Subject to factory lead times
The TT1000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$272.88
Available for Purchase
Subject to factory lead times
The TT10000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$1,321.82
Available for Purchase
Subject to factory lead times
The TT2000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$454.47
Available for Purchase
Subject to factory lead times
The TT4000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$684.75
Available for Purchase
Subject to factory lead times
Factory service option VS1 for PrimeRoyal pump systems. Covers: Spring loaded ball - at suct. side: 0.2 bar / at disch. side: 1 bar - For XV liquid ends with plungers Ø 6 to 16 mm (DSD 71 and 91) ONLY. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$712.47
Available for Purchase
Subject to factory lead times
Factory service option VV2 for PrimeRoyal pump systems. Covers: NPT Vertical Vertical $ -. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$138.85
Available for Purchase
Subject to factory lead times
Milton Roy;Pump with Motor
Requires Quote
Available for Purchase
Subject to factory lead times
Order code PKN covers a specialized factory service or configuration for PrimeRoyal metering pumps. Covers: Option for Single diaphragm: diaphragm in PEEK, seal o-rings in nitril. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$39.53
Available for Purchase
Subject to factory lead times
Factory service option PMZ for PrimeRoyal pump systems. Covers: Factory Field Service – For STI actuators: same as PM + air failure lock up system: last position / air failure lock up system: return to 0% or 100%. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$9,371.60
Available for Purchase
Subject to factory lead times
Factory service option PON for PrimeRoyal pump systems. Covers: Option for Double diaphragm: intermediate diaphragm in POM, seal o-rings in nitril. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$39.53
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP41-40) covers 40 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.
$118,439.93
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP43-28) covers 28 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.
$116,227.43
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP43-32) covers 32 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.
$117,331.14
Available for Purchase
Subject to factory lead times
This PrimeRoyal® R liquid end (PXP43-36) covers 36 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.
$118,439.93
Available for Purchase
Subject to factory lead times
The RPM130 is a scheduled-maintenance kit for the Milroyal D liquid end. Includes the diaphragm or oil seal, O-rings, and check-valve components specific to this liquid end material and size. Rebuild kits simplify planned maintenance and keep the pump at its rated accuracy and pressure capability. Check the RPM kit chart to confirm the correct kit number for your liquid end material code and plunger diameter.
$1,393.53
Available for Purchase
Subject to factory lead times
The RPM54773 maintenance kit covers the consumable components in a PROTEUS™ liquid end. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$546.18
Available for Purchase
Subject to factory lead times
The RPM54774 maintenance kit covers the consumable components in a PROTEUS™ liquid end. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$526.44
Available for Purchase
Subject to factory lead times
The RPM54776 is a scheduled-maintenance kit for PROTEUS™ liquid ends. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$1,132.95
Available for Purchase
Subject to factory lead times
The RPM54782 maintenance kit covers the consumable components in a PROTEUS™ liquid end. Each kit includes the primary diaphragm, secondary diaphragm housing seal, all required O-rings, and replaceable check-valve components or balls and seats. Ordering one kit per scheduled service interval keeps parts on the shelf and reduces unplanned downtime.
$314.77
Available for Purchase
Subject to factory lead times
The TT0060 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$172.45
Available for Purchase
Subject to factory lead times
The TT0100 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$182.60
Available for Purchase
Subject to factory lead times
The TT0250 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$200.86
Available for Purchase
Subject to factory lead times
The TT0500 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$226.22
Available for Purchase
Subject to factory lead times
The TT1000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$272.88
Available for Purchase
Subject to factory lead times
The TT10000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$1,321.82
Available for Purchase
Subject to factory lead times
The TT2000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$454.47
Available for Purchase
Subject to factory lead times
The TT4000 is a safety valve accessory for Milton Roy metering pump installations. Provides overpressure protection on metering pump discharge piping. These valves protect against blocked injection lines, sudden downstream pressure spikes, and other conditions that could damage the pump head or diaphragm. Select the correct pressure rating and body material to match the process service and discharge pressure range.
$684.75
Available for Purchase
Subject to factory lead times
Factory service option VS1 for PrimeRoyal pump systems. Covers: Spring loaded ball - at suct. side: 0.2 bar / at disch. side: 1 bar - For XV liquid ends with plungers Ø 6 to 16 mm (DSD 71 and 91) ONLY. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$712.47
Available for Purchase
Subject to factory lead times
Factory service option VV2 for PrimeRoyal pump systems. Covers: NPT Vertical Vertical $ -. Factory service options are applied at time of manufacture and must be specified when placing the pump order. These options allow the pump to be configured, tested, or documented to project-specific requirements before shipment, reducing site commissioning time and ensuring compliance with customer specifications.
$138.85
Available for Purchase
Subject to factory lead times
Milton Roy;Pump with Motor
Requires Quote
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.