Categories from Spartan Scientific (6)

Solenoid Valves
Solenoid Valves

Solenoid valves provide fast, reliable on/off control of liquids and gases by utilizing an electric coil to actuate the valve. Compact and efficient, they integrate seamlessly into automated systems for applications such as cooling, lubrication, chemical dosing, and process isolation. Available in a variety of materials and designs to handle different pressures, temperatures, and media.

Diaphragm Valves
Diaphragm Valves

Diaphragm valves are designed to regulate the flow of liquids and gases by using a flexible diaphragm to create a secure seal. These valves are ideal for applications where the transported media is corrosive, abrasive, or requires sanitary handling. Their simple yet effective design minimizes the risk of contamination, making them widely used in industries such as chemical processing, pharmaceuticals, food and beverage, and water treatment.


Centro offers a comprehensive selection of diaphragm valves in manual and pneumatic actuated designs to suit various operational needs. Whether you require precise hand-operated flow control or an automated valve for high-efficiency processing, we have the right solution.

Types of Diaphragm Valves We Offer

  • Manual Diaphragm Valves – Hand-operated for precise control in low-pressure systems
  • Pneumatic Actuated Diaphragm Valves – Use compressed air for automated on/off operation
  • Weir-Type Diaphragm Valves – Provide excellent sealing for corrosive and particulate-laden fluids
  • Straight-Through Diaphragm Valves – Offer minimal flow resistance for high-purity applications
  • Sanitary Diaphragm Valves – Designed for hygienic industries, including food, beverage, and pharmaceuticals

Why Choose Diaphragm Valves from Centro?

  • Superior sealing performance for corrosive, abrasive, and sanitary applications
  • Available in a variety of materials, including stainless steel, plastic, and lined options
  • Suitable for industries such as chemical processing, pharmaceuticals, biotechnology, and water treatment
  • Sourced from trusted manufacturers to ensure durability, reliability, and compliance with industry standards


Centro provides high-quality diaphragm valves designed for long-lasting performance. Browse our selection and order online today, or contact our team for expert assistance in selecting the right valve for your application.

Pilot Valves
Pilot Valves

Pilot valves are critical for operating larger valves or control actuators in fluid control systems. These valves act as control mechanisms, receiving signals from external devices such as sensors, controllers, or other valves and initiating the opening or closing of the main valve or actuator. Pilot valves are commonly used in applications where high-pressure fluids or significant flow rates are involved, such as hydraulic systems, pneumatic systems, and industrial machinery. They provide reliable and precise control, ensuring efficient operation and safety. With various configurations and actuation methods available, including solenoid-operated, manual, or pilot-operated, pilot valves offer versatility and flexibility to meet specific system requirements.

Drain Valves
Drain Valves

Drain valves are essential components in fluid management systems, designed to control the flow and drainage of liquids and gases. These valves play a crucial role in various industries, ensuring the safe and efficient removal of unwanted fluids from pipelines, tanks, and other equipment. Whether it's for industrial, commercial, or residential applications, reliable drain valves help prevent leaks, maintain optimal system performance, and safeguard against potential hazards. With a wide range of materials, sizes, and configurations available, finding the perfect drain valve to suit specific needs has never been easier. Choose high-quality drain valves to enhance fluid control and maintain the integrity of your operations.

Valve Accessories
Valve Accessories

Valve accessories are additional components that enhance the functionality and performance of valves in fluid control systems. These accessories are designed to provide other features, improve safety, or simplify maintenance of the valves. Valve accessories enhance the reliability, efficiency, and safety of valve operations, making them essential for various industries such as oil and gas, chemical processing, water treatment, and power generation.

Proportional Valves
Proportional Valves

Proportional valves are advanced control valves that provide precise and proportional control over fluid flow rates or pressures. These valves are designed to accurately regulate the flow or pressure of liquids or gases in various industrial applications. Proportional valves offer the ability to adjust the valve opening or position in proportion to an input signal, typically an electrical or analog signal. This allows for fine-tuned control and modulation of the flow or pressure, enabling precise adjustments based on system requirements. Proportional valves are commonly used in automation, robotics, process control, and hydraulic systems, where precise and dynamic control is essential for optimal performance.

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Spartan Scientific 3516 Series

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The Spartan Scientific Series 3516 2-Way, 2-Position Normally Closed or Normally Opened solenoid diaphragm process valve offers the highest flow for the smallest overall size in its class as compared to competitive units. The valve is designed from the ground up using modern design technologies and materials. The potable water brass body is media compatible, rugged and virtually indestructible. The body is available in 1/4”, 3/8” and 1/2” NPT. The low wattage solenoid features a DIN Style “A” EN175301-803 (Formerly DIN 43650) electrical interface and is nylon encapsulated. FKM, EPDM and NBR are standard elastomers and the operators are made of stainless steel / brass or stainless steel / brass with copper shading rings for AC versions. Typical applications include control of inert gases, water and compatible fluids.
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Spartan Scientific 3510 Series

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The Spartan Scientific Series 3510 2-Way, 2-Position, internally piloted solenoid valve uses the latest technologies for materials and function. This combination provides the user with the highest quality, smallest size per Cv of flow and most competitive pricing of any valve on the market. The 3510 gives full flow throughout the pressure range starting with a Maximum Operating Pressure Differential of 1.5 psi while remaining sealed at 0 psi. The body is available in 1/4", 3/8" and 1/2" NPT sizes and features a stainless steel anti-flex ring for port strength. The molded pilot section features a push, non-locking manual override, high cycle life solenoid parts, and quick connect DIN Style “A” EN175301-803 (Formerly DIN 43650) or “flying lead” electrical connection options. Typical applications include air, emulsion, inert gases, oil and water control, condensate drainage, hot water plumbing and sprinkler systems.
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Spartan Scientific 3505 Series

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The Spartan Scientific Series 3505 is a 2-Way, 2-Position, internally piloted solenoid valve for the control of air, emulsion, inert gases and water. The valve features an all brass body and a full flow 1/2” orifice while maintaining a 1.5 minimum pressure differential. The design allows for a tight seal on the orifice at 0 psi. Available in 1/4”, 3/8” and 1/2” NPT, the 3505 can handle pressures to 230 psi. The encapsulated coil construction ensures that the valve functions well under long periods of activation (100% duty), as well as providing a high degree of environmental protection (NEMA 4). The inner valve functions as a direct assist using a flat diaphragm and orifice plate. Pressure differentials shift the valve to full open or full closed. A push, non-locking manual override is standard.
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Spartan Scientific Series Stepper 12

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The Spartan Scientific Stepper 12 Stepper valve is a self-contained Media Separated Electronic Proportional Flow Control Valve designed for highly accurate electronically controlled variable flow control of inert fluids and gases. Applying analog input signals to built-in control circuit of the stepper valve, it is possible to produce linear variable flow output. The Stepper valve can control its flow by using 1,500 positions through its valve stroke range which can be dialed down to the step, creating reliable and repeatable flow rates 0 to 30 GPM (water) @ 150 PSI. The valve features a built-in electronic control that accommodates either open or closed loop control by use of electronic signal input of either 4 to 20 mA, 0 to 10 Volt DC. Valve standard operating voltages are 12 or 24 VDC. The Stepper 12 has a separating diaphragm that maintains dry mechanical movement and is designed for long life and high flow. The diaphragm is designed with a specialized convolution and elliptical flow tip producing a linear flow versus valve stroke position. The Stepper 12 valve body is available in 1/4”, 3/8” or 1/2” port sizes with a maximum flow orifice of 12.5mm. Featuring multi orientation mounting and the quick connect M12 connector mates to the valve for a sure environmentally resistant enclosure to NEMA 4/IP 65. This energy saving valve uses voltage to move into position and needs only 60mA when position is found and maintains a steady state. For fast troubleshooting, the on-board indicator LED (RGB) light ring displays status of the device.
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The Spartan Scientific Series 3680 2-Way, 2-Position solenoid diaphragm valve offers the highest flow for the smallest overall size in its class. The valve is designed from the ground up using modern design technologies and materials. Featuring a full flow orifice, the 3680 is available in either Normally Closed or Normally Open configurations. The PEI body is media compatible, light in weight, and by use of external metal port rings, is virtually indestructible. The Normally Open version of the valve features an optional turn lock manual override and has no external by-pass tube which eliminates leak points and size. The body is available in 3/4” and 1” NPT. The low wattage solenoid features an Industry Standard 22 mm wide coil electrical interface and is nylon encapsulated. FKM, EPDM and NBR are standard elastomers and the operators are made of stainless steel / brass or stainless steel / brass with copper shading rings for AC versions. Typical applications include control of inert gases, water and compatible fluids.

$169.47$177.95

You save 5%
Available for Purchase

Subject to factory lead times

The Spartan Scientific Series 3680 2-Way, 2-Position solenoid diaphragm valve offers the highest flow for the smallest overall size in its class. The valve is designed from the ground up using modern design technologies and materials. Featuring a full flow orifice, the 3680 is available in either Normally Closed or Normally Open configurations. The PEI body is media compatible, light in weight, and by use of external metal port rings, is virtually indestructible. The Normally Open version of the valve features an optional turn lock manual override and has no external by-pass tube which eliminates leak points and size. The body is available in 3/4” and 1” NPT. The low wattage solenoid features an Industry Standard 22 mm wide coil electrical interface and is nylon encapsulated. FKM, EPDM and NBR are standard elastomers and the operators are made of stainless steel / brass or stainless steel / brass with copper shading rings for AC versions. Typical applications include control of inert gases, water and compatible fluids.

$164.79$173.04

You save 5%
Available for Purchase

Subject to factory lead times

Diaphragm Process Valve, 2-way, 2-position, Normally Closed, Composite Valve Body

$175.60$184.39

You save 5%
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Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$42.80$44.94

You save 5%
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Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$42.80$44.94

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$42.80$44.94

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Open

$42.80$44.94

You save 5%
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Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$54.99$57.73

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Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$54.99$57.73

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Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$44.61$46.83

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Direct Acting Valve, 2-Way , 2-Position, Normally Open, Composite Valve Body

$102.36$107.48

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Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

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Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

You save 5%
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Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$38.18$40.08

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Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$43.75$45.94

You save 5%
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Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Open, Composite Valve Body

$100.60$105.64

You save 5%
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Direct Acting Valve, 2-Way, 2-Position, Normally Open, Composite Valve Body

$100.60$105.64

You save 5%
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Direct Acting Valve, 3-Way, 2-Position, Diverting, Composite Valve Body

$37.05$38.95

You save 5%
Available for Purchase

Subject to factory lead times

Spartan Scientific 3516 Series

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The Spartan Scientific Series 3516 2-Way, 2-Position Normally Closed or Normally Opened solenoid diaphragm process valve offers the highest flow for the smallest overall size in its class as compared to competitive units. The valve is designed from the ground up using modern design technologies and materials. The potable water brass body is media compatible, rugged and virtually indestructible. The body is available in 1/4”, 3/8” and 1/2” NPT. The low wattage solenoid features a DIN Style “A” EN175301-803 (Formerly DIN 43650) electrical interface and is nylon encapsulated. FKM, EPDM and NBR are standard elastomers and the operators are made of stainless steel / brass or stainless steel / brass with copper shading rings for AC versions. Typical applications include control of inert gases, water and compatible fluids.
Configure Product

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Spartan Scientific 3510 Series

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The Spartan Scientific Series 3510 2-Way, 2-Position, internally piloted solenoid valve uses the latest technologies for materials and function. This combination provides the user with the highest quality, smallest size per Cv of flow and most competitive pricing of any valve on the market. The 3510 gives full flow throughout the pressure range starting with a Maximum Operating Pressure Differential of 1.5 psi while remaining sealed at 0 psi. The body is available in 1/4", 3/8" and 1/2" NPT sizes and features a stainless steel anti-flex ring for port strength. The molded pilot section features a push, non-locking manual override, high cycle life solenoid parts, and quick connect DIN Style “A” EN175301-803 (Formerly DIN 43650) or “flying lead” electrical connection options. Typical applications include air, emulsion, inert gases, oil and water control, condensate drainage, hot water plumbing and sprinkler systems.
Configure Product

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Spartan Scientific 3505 Series

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The Spartan Scientific Series 3505 is a 2-Way, 2-Position, internally piloted solenoid valve for the control of air, emulsion, inert gases and water. The valve features an all brass body and a full flow 1/2” orifice while maintaining a 1.5 minimum pressure differential. The design allows for a tight seal on the orifice at 0 psi. Available in 1/4”, 3/8” and 1/2” NPT, the 3505 can handle pressures to 230 psi. The encapsulated coil construction ensures that the valve functions well under long periods of activation (100% duty), as well as providing a high degree of environmental protection (NEMA 4). The inner valve functions as a direct assist using a flat diaphragm and orifice plate. Pressure differentials shift the valve to full open or full closed. A push, non-locking manual override is standard.
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Spartan Scientific Series Stepper 12

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The Spartan Scientific Stepper 12 Stepper valve is a self-contained Media Separated Electronic Proportional Flow Control Valve designed for highly accurate electronically controlled variable flow control of inert fluids and gases. Applying analog input signals to built-in control circuit of the stepper valve, it is possible to produce linear variable flow output. The Stepper valve can control its flow by using 1,500 positions through its valve stroke range which can be dialed down to the step, creating reliable and repeatable flow rates 0 to 30 GPM (water) @ 150 PSI. The valve features a built-in electronic control that accommodates either open or closed loop control by use of electronic signal input of either 4 to 20 mA, 0 to 10 Volt DC. Valve standard operating voltages are 12 or 24 VDC. The Stepper 12 has a separating diaphragm that maintains dry mechanical movement and is designed for long life and high flow. The diaphragm is designed with a specialized convolution and elliptical flow tip producing a linear flow versus valve stroke position. The Stepper 12 valve body is available in 1/4”, 3/8” or 1/2” port sizes with a maximum flow orifice of 12.5mm. Featuring multi orientation mounting and the quick connect M12 connector mates to the valve for a sure environmentally resistant enclosure to NEMA 4/IP 65. This energy saving valve uses voltage to move into position and needs only 60mA when position is found and maintains a steady state. For fast troubleshooting, the on-board indicator LED (RGB) light ring displays status of the device.
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The Spartan Scientific Series 3680 2-Way, 2-Position solenoid diaphragm valve offers the highest flow for the smallest overall size in its class. The valve is designed from the ground up using modern design technologies and materials. Featuring a full flow orifice, the 3680 is available in either Normally Closed or Normally Open configurations. The PEI body is media compatible, light in weight, and by use of external metal port rings, is virtually indestructible. The Normally Open version of the valve features an optional turn lock manual override and has no external by-pass tube which eliminates leak points and size. The body is available in 3/4” and 1” NPT. The low wattage solenoid features an Industry Standard 22 mm wide coil electrical interface and is nylon encapsulated. FKM, EPDM and NBR are standard elastomers and the operators are made of stainless steel / brass or stainless steel / brass with copper shading rings for AC versions. Typical applications include control of inert gases, water and compatible fluids.

$169.47$177.95

You save 5%
Available for Purchase

Subject to factory lead times

The Spartan Scientific Series 3680 2-Way, 2-Position solenoid diaphragm valve offers the highest flow for the smallest overall size in its class. The valve is designed from the ground up using modern design technologies and materials. Featuring a full flow orifice, the 3680 is available in either Normally Closed or Normally Open configurations. The PEI body is media compatible, light in weight, and by use of external metal port rings, is virtually indestructible. The Normally Open version of the valve features an optional turn lock manual override and has no external by-pass tube which eliminates leak points and size. The body is available in 3/4” and 1” NPT. The low wattage solenoid features an Industry Standard 22 mm wide coil electrical interface and is nylon encapsulated. FKM, EPDM and NBR are standard elastomers and the operators are made of stainless steel / brass or stainless steel / brass with copper shading rings for AC versions. Typical applications include control of inert gases, water and compatible fluids.

$164.79$173.04

You save 5%
Available for Purchase

Subject to factory lead times

Diaphragm Process Valve, 2-way, 2-position, Normally Closed, Composite Valve Body

$175.60$184.39

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$42.80$44.94

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$42.80$44.94

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$42.80$44.94

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Open

$42.80$44.94

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$54.99$57.73

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed

$54.99$57.73

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$44.61$46.83

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way , 2-Position, Normally Open, Composite Valve Body

$102.36$107.48

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$38.18$40.08

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$43.75$45.94

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Closed, Composite Valve Body

$32.42$34.04

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Open, Composite Valve Body

$100.60$105.64

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 2-Way, 2-Position, Normally Open, Composite Valve Body

$100.60$105.64

You save 5%
Available for Purchase

Subject to factory lead times

Direct Acting Valve, 3-Way, 2-Position, Diverting, Composite Valve Body

$37.05$38.95

You save 5%
Available for Purchase

Subject to factory lead times