Valves - Spartan Scientific
Valves control, regulate, and direct the flow of fluids in industrial systems. They keep water, steam, chemicals, gases, slurries, and light oils moving safely and efficiently. A valve either shuts flow off complet...
Categories from Spartan Scientific (6)
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 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 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 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 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 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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The Spartan Scientific Series CRDV (Condensation Removal Drain Valve) is a unique and efficient way to keep your air lines and tanks free of water with this robust electronic timed automatic drain valve. The unit installs in a modular form between an existing coil and connector with a plug and play design and retrofits on virtually any installation. The Cycle and On times are easily adjustable on the compact sandwich timer and features two status indicator lights. The Cycle Time drain has settings to release moisture every 1 to 45 minutes. The On Time setting allows you to set how long you want the valve open, 0.25 to 25 seconds. We offer a variety of Nylon or Brass valves depending on your application. These 2-Way, 2-Position, Normally Closed valves range from 1/4”, 3/8”, 1/2” or 1” NPT and can handle pressures up to 230 psi max. The Series CRDV offers its users the most versatile combination of timing and flow capacities in the industry today, and is proudly made in the USA.
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The Spartan Scientific APVS15 is an inert gas/spring operated, Single Acting Normally Closed, or Double Acting media compatible dia-phragm valve designed for control of high purity, aggressive and corrosive liquid chemical media. With a small overall footprint, and low dead volume, the APVS 15 features CPVC bodies, and FKM, EDPM and NBR elastomers to control orifice sizes 16mm and 20mm which afford Cv ratings of 4.70 and 10.9 that far exceed competitive valves of this type. Pressure ratings go from 10 to 100 psi depending on orifice size and each valve is tested to bubble tight standard ANSI FCI 70-2 Class VI. The APVS15 can be controlled by our proven Spartan Scientific 3-way solenoid pilot valve which enhances operation with manual override and indicator lighted connector options. The Normally Closed version features an optical position indicator showing valve open condition. The APVS15 is used where sampling, drain-ing, or transferring process fluid are performed. A Normally Open version can be made using a Normally Open pilot valve. In the case of pilot gas failure, the valve will fail closed. In the case where electric power is lost but pilot gas remains, the valve will remain open. An optional magnetic piston is available for end of stroke sensing when combined with the optional valve position sensor.
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The Spartan Scientific Series APVS04 is an inert gas/spring operated, Single Acting Normally Closed, or Double Acting media compatible diaphragm valve, designed for control of high purity, aggressive and corrosive liquid chemical media. It has a miniature overall footprint, and low dead volume. The Series APVS04 features media compatible composite body, and FKM, NBR, and EPDM elastomers to control the 6mm orifice which afford Cv ratings of .72 that far exceed competitive valves of this type and size. Media pressure ratings range from 0 to 200 psi and pilot pressure is 60 psi minimum. A Normally Open version can be made using a Normally Open pilot valve. In the case of pilot gas failure, the valve will fail closed. In the case where electric power is lost but pilot gas remains, the valve will remain open. Each valve is tested to bubble tight standard ANSI FCI 70-2 Class VI. The Series APVS04 can be controlled by our proven Spartan Scientific 3-way solenoid pilot valve which enhances operation with manual override and indicator lighted connector options, and is used where sampling, draining, or transferring process fluid are performed. An optional magnetic piston is available for end of stroke sensing when combined with the additional valve position sensor.
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The Spartan Scientific Series APV-30 is a rugged full featured, pneumatically piloted ball valve. The unit is available in Normally Open, Normally Closed or Double Acting versions. The Series APV-30 sizes range from 1/2” to 2.0” NPT. This unit is compact as compared to competitive rack and pinion or motorized ball valves and comes standard with an ON-OFF indicator. The Series APV-30 features PTFE ball valve sealing using Chrome plated brass or 316 Series Stainless Steel balls. The valve body materials are E-Nickel plated brass and 316 Series Stainless Steel.
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The Spartan Scientific Series APV-23 is 2-way, 2-position valve specifically designed for the control of air, oil or steam The Series APV-23 uses a specially designed Teflon Chevron® seal which ensures separation of the media and pilot sections. In the single acting Normally Closed version, the Series APV-23 uses a spring extended pneumatic operator connected to a sealing disc which when retracted unseats from a precision orifice and allows fluid flow. When pilot pressure is removed from the Series APV-23 the seat returns to the orifice and flow stops. Features of the Series APV-23 are the ON-OFF indicator at the top of the pneumatic actuator and can be used for high temperature liquids compatible with the materials of construction and steam. The stainless steel body is standard and is available in sizes ranging from 1/2” to 2.0” NPT and can control media up to 215 psi in various configurations.
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The Spartan Scientific Series 6700 2-Way, 2-Position process type solenoid operated diaphragm valve offers the highest flow for the smallest overall size in its class in an all brass body form. The valve is designed from the ground up using modern design technologies and materials. The heart of the design uses a rolling diaphragm which exhibits superior flow for size. Featuring a full flow 28.58mm (1.13") orifice, the 6700 is available in Normally Closed configurations. The all brass body construction is available in 3/4" and 1.0" NPT port configuration with a maximum of 14 Cv (maximum flow is 53.3 GPM @ 120 PSI), This design is virtually indestructible when using clean media and proper environment. Typical applications include 2 way control of inert gases, water and compatible fluids.
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The Spartan Scientific Series 6222 solenoid valves are used as 2-Way & 3-Way, 2-Position, Normally Closed, Normally Open, Mixing or Diverting functions for the control of air, caustics, inert gases, oil, and water. The robust design incorporates all stainless steel stop plunger and tube assembly as well as spring compensated top seats installed in a low-lead brass forged body with 1/8”, 1/4” and 3/8” NPT ports standard. Available in 0.8mm (0.03 Cv) to 6.0mm (0.72 Cv) orifice sizes, the 6222 can control a broad range of flow and pressure ratings. Standard elastomers are EPDM, FKM or NBR for media compatibility. The class F coils are all Glass-Filled Nylon encapsulated, 100% duty, all standard voltages, and are available in DIN 43650 Form “A”, flying lead, DIN form A connector with 1/2” conduit.
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The Spartan Scientific Series 6200 is a 2-Way or 3-Way, 2-Position direct acting solenoid valve utilizing a long life spring compensated solenoid poppet at the heart of an all stainless steel solenoid operator (430FR and 316SS). Standard body material is Glass-Filled Nylon. With orifice sizes ranging from 0.8mm up to 6.0mm standard, the 6200 valve can handle a wide variety of flow rates as well as pressure ranges from 0 to 250PSI in various versions. Offered with or without manual override, the Series 6200 employs use of the orifice basket design unique to Spartan valves which allows for quick change-over for production of any orifice size as standard. This aids in versatility of valve manufacture and increases valve availability. The composite valve body is of robust design and is compatible with liquids and gases at lowest possible cost. The ports available are 1/8", 1/4", 3/8" NPT standard. All common voltages are offered as well as electrical connection styles which include a DIN 43650 spaded coil as well as flying lead styles. Coils are sealed to IP 65. Valve functions include Normally Closed, Normally Open, Mixing and Diverting.
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The Spartan Scientific 4DKR is a direct operating 2-way 2-position media separated valve for control of aggressive media that can damage wetted solenoid valve components. This unique valve design incorporates the innovative Spring Diaphragm which retains the media in the valve body effectively separating the metal operator components from the media for extremely long life cycles and media compatibility. The 4DKR is a sub-based valve designed to be mounted on a manifold machined to match the design template for mounting screws and flow paths. The design is made so that the manifold can be easily machined using common tools so that common passageways can be machined in a block with one inlet and many outlets reducing the size needed for an installation as well as leak points and fittings with corresponding labor. The valve offers a full flow 12.5mm orifice and can control media compatible with Glass-Filled Nylon, PEI, FKM, EPDM, and NBR elastomers. Available in all standard voltages, the 4DKR can control up to 20 PSI inlet pressure with no minimum operating pressure differential. The fully nylon encapsulated coils are available as DIN 43560 Form A or flying leads. The 4DKR valve body features robust design elements such as all stainless hardware and is designed for a long trouble free life while still controlling compatible aggressive fluids.
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The Spartan Scientific Series 4D85 is a direct operating 2-Way 2-Position media separated valve for control of aggressive media that can damage wetted solenoid valve components . The valve incorporates the innovative Spring Diaphragm which retains the media in the valve body effectively separating the metal operator components from the media for extremely long life cycles and media compatibility. The 4D85 is a stand alone body ported valve, available in 1/4”, 3/8”, and 1/2” NPT port connections and offers a full flow 12.5mm orifice. The 4D85 can control media compatible with Glass-Filled Nylon, PEI, and FKM, EPDM, and NBR elastomers. Available in all standard voltages, the 4D85 can control up to 20 PSI inlet pressure with no minimum operating pressure differential. The fully nylon encapsulated coils are available in DIN 43560 Form “A” and flying leads. The 4D85 valve body features robust design elements such as all stainless hardware and metal reinforced port rings which virtually eliminate valve body damage. The 4D85 is designed for a long trouble free life while still controlling compatible aggressive fluids.
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The Spartan Scientific Series 4BKR is a 2-Way, 2-Position media separated solenoid valve that is used for the control of ultra pure or corrosive media that would otherwise cause premature failure on wetted type solenoid valves. Featuring the Spartan Scientific low volume valve cavity and the rolling diaphragm, the 4BKR has no convolutions for chemicals to congregate or dead spots for flow. The all encapsulated coil, stainless steel tube and plunger assembly are designed for a long trouble free life. Also featuring a quick connect interface, the valve can be mounted in a gang style on a manifold block by using four fasteners and two o-rings.
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The Spartan Scientific Series 4B23 is a media separated, 2-Way 2-Position solenoid operated valve where the media remains isolated from the metal working components within the valve. This creates a barrier to contamination to both the fluid and the operator which serves two purposes. The media remains untainted by the metals in the operator while the close tolerance moving parts of the valve are insulated from the effects of particulates, aggressive chemicals which can affect long term life of solenoid valves. The 4B23 is available in 1/4” or 3/8” NPT connections with orifice ranges from 2.0mm to 5.0mm which gives the 4B23 great flow and operating pressure ranges to meet differing applications. The 4B23 features a DIN quick connect coil or flying leads connection. The valve is designed for long trouble free life with the incorporation of a rolling type diaphragm, life cycle proven metal operator components and a fully encapsulated coil system. The Valve is available in Normally Closed or Normally Open configurations and has two body ports for convenient fluid connection.
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The Spartan Scientific Series CRDV (Condensation Removal Drain Valve) is a unique and efficient way to keep your air lines and tanks free of water with this robust electronic timed automatic drain valve. The unit installs in a modular form between an existing coil and connector with a plug and play design and retrofits on virtually any installation. The Cycle and On times are easily adjustable on the compact sandwich timer and features two status indicator lights. The Cycle Time drain has settings to release moisture every 1 to 45 minutes. The On Time setting allows you to set how long you want the valve open, 0.25 to 25 seconds. We offer a variety of Nylon or Brass valves depending on your application. These 2-Way, 2-Position, Normally Closed valves range from 1/4”, 3/8”, 1/2” or 1” NPT and can handle pressures up to 230 psi max. The Series CRDV offers its users the most versatile combination of timing and flow capacities in the industry today, and is proudly made in the USA.
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The Spartan Scientific APVS15 is an inert gas/spring operated, Single Acting Normally Closed, or Double Acting media compatible dia-phragm valve designed for control of high purity, aggressive and corrosive liquid chemical media. With a small overall footprint, and low dead volume, the APVS 15 features CPVC bodies, and FKM, EDPM and NBR elastomers to control orifice sizes 16mm and 20mm which afford Cv ratings of 4.70 and 10.9 that far exceed competitive valves of this type. Pressure ratings go from 10 to 100 psi depending on orifice size and each valve is tested to bubble tight standard ANSI FCI 70-2 Class VI. The APVS15 can be controlled by our proven Spartan Scientific 3-way solenoid pilot valve which enhances operation with manual override and indicator lighted connector options. The Normally Closed version features an optical position indicator showing valve open condition. The APVS15 is used where sampling, drain-ing, or transferring process fluid are performed. A Normally Open version can be made using a Normally Open pilot valve. In the case of pilot gas failure, the valve will fail closed. In the case where electric power is lost but pilot gas remains, the valve will remain open. An optional magnetic piston is available for end of stroke sensing when combined with the optional valve position sensor.
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The Spartan Scientific Series APVS04 is an inert gas/spring operated, Single Acting Normally Closed, or Double Acting media compatible diaphragm valve, designed for control of high purity, aggressive and corrosive liquid chemical media. It has a miniature overall footprint, and low dead volume. The Series APVS04 features media compatible composite body, and FKM, NBR, and EPDM elastomers to control the 6mm orifice which afford Cv ratings of .72 that far exceed competitive valves of this type and size. Media pressure ratings range from 0 to 200 psi and pilot pressure is 60 psi minimum. A Normally Open version can be made using a Normally Open pilot valve. In the case of pilot gas failure, the valve will fail closed. In the case where electric power is lost but pilot gas remains, the valve will remain open. Each valve is tested to bubble tight standard ANSI FCI 70-2 Class VI. The Series APVS04 can be controlled by our proven Spartan Scientific 3-way solenoid pilot valve which enhances operation with manual override and indicator lighted connector options, and is used where sampling, draining, or transferring process fluid are performed. An optional magnetic piston is available for end of stroke sensing when combined with the additional valve position sensor.
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The Spartan Scientific Series APV-30 is a rugged full featured, pneumatically piloted ball valve. The unit is available in Normally Open, Normally Closed or Double Acting versions. The Series APV-30 sizes range from 1/2” to 2.0” NPT. This unit is compact as compared to competitive rack and pinion or motorized ball valves and comes standard with an ON-OFF indicator. The Series APV-30 features PTFE ball valve sealing using Chrome plated brass or 316 Series Stainless Steel balls. The valve body materials are E-Nickel plated brass and 316 Series Stainless Steel.
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The Spartan Scientific Series APV-23 is 2-way, 2-position valve specifically designed for the control of air, oil or steam The Series APV-23 uses a specially designed Teflon Chevron® seal which ensures separation of the media and pilot sections. In the single acting Normally Closed version, the Series APV-23 uses a spring extended pneumatic operator connected to a sealing disc which when retracted unseats from a precision orifice and allows fluid flow. When pilot pressure is removed from the Series APV-23 the seat returns to the orifice and flow stops. Features of the Series APV-23 are the ON-OFF indicator at the top of the pneumatic actuator and can be used for high temperature liquids compatible with the materials of construction and steam. The stainless steel body is standard and is available in sizes ranging from 1/2” to 2.0” NPT and can control media up to 215 psi in various configurations.
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The Spartan Scientific Series 6700 2-Way, 2-Position process type solenoid operated diaphragm valve offers the highest flow for the smallest overall size in its class in an all brass body form. The valve is designed from the ground up using modern design technologies and materials. The heart of the design uses a rolling diaphragm which exhibits superior flow for size. Featuring a full flow 28.58mm (1.13") orifice, the 6700 is available in Normally Closed configurations. The all brass body construction is available in 3/4" and 1.0" NPT port configuration with a maximum of 14 Cv (maximum flow is 53.3 GPM @ 120 PSI), This design is virtually indestructible when using clean media and proper environment. Typical applications include 2 way control of inert gases, water and compatible fluids.
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The Spartan Scientific Series 6222 solenoid valves are used as 2-Way & 3-Way, 2-Position, Normally Closed, Normally Open, Mixing or Diverting functions for the control of air, caustics, inert gases, oil, and water. The robust design incorporates all stainless steel stop plunger and tube assembly as well as spring compensated top seats installed in a low-lead brass forged body with 1/8”, 1/4” and 3/8” NPT ports standard. Available in 0.8mm (0.03 Cv) to 6.0mm (0.72 Cv) orifice sizes, the 6222 can control a broad range of flow and pressure ratings. Standard elastomers are EPDM, FKM or NBR for media compatibility. The class F coils are all Glass-Filled Nylon encapsulated, 100% duty, all standard voltages, and are available in DIN 43650 Form “A”, flying lead, DIN form A connector with 1/2” conduit.
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The Spartan Scientific Series 6200 is a 2-Way or 3-Way, 2-Position direct acting solenoid valve utilizing a long life spring compensated solenoid poppet at the heart of an all stainless steel solenoid operator (430FR and 316SS). Standard body material is Glass-Filled Nylon. With orifice sizes ranging from 0.8mm up to 6.0mm standard, the 6200 valve can handle a wide variety of flow rates as well as pressure ranges from 0 to 250PSI in various versions. Offered with or without manual override, the Series 6200 employs use of the orifice basket design unique to Spartan valves which allows for quick change-over for production of any orifice size as standard. This aids in versatility of valve manufacture and increases valve availability. The composite valve body is of robust design and is compatible with liquids and gases at lowest possible cost. The ports available are 1/8", 1/4", 3/8" NPT standard. All common voltages are offered as well as electrical connection styles which include a DIN 43650 spaded coil as well as flying lead styles. Coils are sealed to IP 65. Valve functions include Normally Closed, Normally Open, Mixing and Diverting.
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The Spartan Scientific 4DKR is a direct operating 2-way 2-position media separated valve for control of aggressive media that can damage wetted solenoid valve components. This unique valve design incorporates the innovative Spring Diaphragm which retains the media in the valve body effectively separating the metal operator components from the media for extremely long life cycles and media compatibility. The 4DKR is a sub-based valve designed to be mounted on a manifold machined to match the design template for mounting screws and flow paths. The design is made so that the manifold can be easily machined using common tools so that common passageways can be machined in a block with one inlet and many outlets reducing the size needed for an installation as well as leak points and fittings with corresponding labor. The valve offers a full flow 12.5mm orifice and can control media compatible with Glass-Filled Nylon, PEI, FKM, EPDM, and NBR elastomers. Available in all standard voltages, the 4DKR can control up to 20 PSI inlet pressure with no minimum operating pressure differential. The fully nylon encapsulated coils are available as DIN 43560 Form A or flying leads. The 4DKR valve body features robust design elements such as all stainless hardware and is designed for a long trouble free life while still controlling compatible aggressive fluids.
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The Spartan Scientific Series 4D85 is a direct operating 2-Way 2-Position media separated valve for control of aggressive media that can damage wetted solenoid valve components . The valve incorporates the innovative Spring Diaphragm which retains the media in the valve body effectively separating the metal operator components from the media for extremely long life cycles and media compatibility. The 4D85 is a stand alone body ported valve, available in 1/4”, 3/8”, and 1/2” NPT port connections and offers a full flow 12.5mm orifice. The 4D85 can control media compatible with Glass-Filled Nylon, PEI, and FKM, EPDM, and NBR elastomers. Available in all standard voltages, the 4D85 can control up to 20 PSI inlet pressure with no minimum operating pressure differential. The fully nylon encapsulated coils are available in DIN 43560 Form “A” and flying leads. The 4D85 valve body features robust design elements such as all stainless hardware and metal reinforced port rings which virtually eliminate valve body damage. The 4D85 is designed for a long trouble free life while still controlling compatible aggressive fluids.
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The Spartan Scientific Series 4BKR is a 2-Way, 2-Position media separated solenoid valve that is used for the control of ultra pure or corrosive media that would otherwise cause premature failure on wetted type solenoid valves. Featuring the Spartan Scientific low volume valve cavity and the rolling diaphragm, the 4BKR has no convolutions for chemicals to congregate or dead spots for flow. The all encapsulated coil, stainless steel tube and plunger assembly are designed for a long trouble free life. Also featuring a quick connect interface, the valve can be mounted in a gang style on a manifold block by using four fasteners and two o-rings.
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The Spartan Scientific Series 4B23 is a media separated, 2-Way 2-Position solenoid operated valve where the media remains isolated from the metal working components within the valve. This creates a barrier to contamination to both the fluid and the operator which serves two purposes. The media remains untainted by the metals in the operator while the close tolerance moving parts of the valve are insulated from the effects of particulates, aggressive chemicals which can affect long term life of solenoid valves. The 4B23 is available in 1/4” or 3/8” NPT connections with orifice ranges from 2.0mm to 5.0mm which gives the 4B23 great flow and operating pressure ranges to meet differing applications. The 4B23 features a DIN quick connect coil or flying leads connection. The valve is designed for long trouble free life with the incorporation of a rolling type diaphragm, life cycle proven metal operator components and a fully encapsulated coil system. The Valve is available in Normally Closed or Normally Open configurations and has two body ports for convenient fluid connection.
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