Control Valves
Harrington offers premium control valves, featuring an extensive selection of brands, styles, connection types, materials, and specifications. These valves are designed to regulate fluid flow in process systems. Our material options include PVC, PTFE, Polypropylene, CPVC, PVDF, and Natural Polypropylene. Choose your product to request a quote and get purchasing information.
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The R-K AOV series airvalve features a compact thermoplastic valve available in six models to handle a multitude of piping systems functions. This patented valve is designed so there is no metal contact with the fluid, and can be operated in any position. Air actuated at 40 to 80 PSI. Direct acting full flow with top entry for easy maintenance and minimum water hammer. Suitable for most harsh chemicals, pollution control, wet processing stations, plating equipment, chemical processing and water treatment applications.
1" Pressure Relief valve threaded PVC EPDM seals
Pressure relief valves are offered in PVC and corzan CPVC. Seals are FPM or EPDM. End connectins are threaded only. Pressure relief valves can be set fron 5 - 75 PSI. Minimum charge for setting pressure exists. Low pressure spring option is available. All valves are assempled with silicone lubricant. The valves are hand adjustable so tools are needed.
Pressure relief valves are offered in PVC and corzan CPVC. Seals are FPM or EPDM. End connectins are threaded only. Pressure relief valves can be set fron 5 - 75 PSI. Minimum charge for setting pressure exists. Low pressure spring option is available. All valves are assempled with silicone lubricant. The valves are hand adjustable so tools are needed.
The R-K FPR series fluid pressure regulator is designed to protect piping systems and equipment from pressure changes. The adjustable screw and lock nut makes it easy to convert varying upstream pressure into accurate pre-set downstream pressure. Outlet pressure should be adjusted in a closed loop system within a range of 15-100 PSI. Top entry and parallel inlet and outlet ports to faciliate installation and avoid piping problems. This patented pressure reducing valve is designed to keep the stainless steel spring totally isolated from the fluid chamber insuring no metal contact with the fluid. It is ideally suited for systems that require additional pressure protection.
The R-K NPR series pilot operated (remote) pressure regulator is ideal for hard to reach places and for situations where instant fluid pressure changes are needed (such as spraying or rinsing applications). When the valve is installed the pressure can be adjusted from 5-100 P.S.I. with an air pressure regulator to protect the system from pressure changes. It will provide accurate outlet flow if a series of pressure regulators are required for a system or operation. Wide working pressure range (5 to 100 PSIG) Top entry for easy in-line maintenance and a minimum water hammer. Air-to-open, spring to close.Molded bodies are standard for 1/2", 3/4", and 1" valves. Suitable for most harsh chemical applications.
Pressure relief valves are offered in PVC and corzan CPVC. Seals are FPM or EPDM. End connectins are threaded only. Pressure relief valves can be set fron 5 - 75 PSI. Minimum charge for setting pressure exists. Low pressure spring option is available. All valves are assempled with silicone lubricant. The valves are hand adjustable so tools are needed.
Pressure relief valves are offered in PVC and corzan CPVC. Seals are FPM or EPDM. End connectins are threaded only. Pressure relief valves can be set fron 5 - 75 PSI. Minimum charge for setting pressure exists. Low pressure spring option is available. All valves are assempled with silicone lubricant. The valves are hand adjustable so tools are needed.
The series RVDT angle pattern pressure relief valve features a single flat diaphragm which is an advantage where salt crystiallization problems can cause valve sticking. Relief setting is infinitely adjustable from 5 psi to 150 psi. The maximum inlet pressure in 210 psi. Availiable in PVC, natural poly pro, PVDF and PTFE. Seals are availble in EPDM or FKM. The adjusting bolt, lock nut and fasteners are stainless steel. The control spring is plated steel but no metal parts are in contact with liquid.
The series RVDT angle pattern pressure relief valve features a single flat diaphragm which is an advantage where salt crystiallization problems can cause valve sticking. Relief setting is infinitely adjustable from 5 psi to 150 psi. The maximum inlet pressure in 210 psi. Availiable in PVC, natural poly pro, PVDF and PTFE. Seals are availble in EPDM or FKM. The adjusting bolt, lock nut and fasteners are stainless steel. The control spring is plated steel but no metal parts are in contact with liquid.
Series RVDT relief valves are available in Geon® PVC, Corzan® CPVC, Natural Polypropylene (virgin, unpigmented, unfilled PPL), Kynar® PVDF and PTFE body materials. The wetted diaphragm is PTFE energized by a non-wetted FKM diaphragm. Spring housing (not wetted) is PVC. Springs (not in wetted area) are zinc-plated steel, external fasteners are stainless steel. Lock nut and adjusting screw are HDPE on 1/4" - 1" sizes. Lock nut and adjusting screw are stainless steel on 1½" and 2" sizes.
Series RVDT relief valves are available in Geon® PVC, Corzan® CPVC, Natural Polypropylene (virgin, unpigmented, unfilled PPL), Kynar® PVDF and PTFE body materials. The wetted diaphragm is PTFE energized by a non-wetted FKM diaphragm. Spring housing (not wetted) is PVC. Springs (not in wetted area) are zinc-plated steel, external fasteners are stainless steel. Lock nut and adjusting screw are HDPE on 1/4" - 1" sizes. Lock nut and adjusting screw are stainless steel on 1½" and 2" sizes. If your environment is incompatible with any of the external materials, or you are interested in some other type of body material, options are available on quantity or special orders.
The series RVDT angle pattern pressure relief valve features a single flat diaphragm which is an advantage where salt crystiallization problems can cause valve sticking. Relief setting is infinitely adjustable from 5 psi to 150 psi. The maximum inlet pressure in 210 psi. Availiable in PVC, natural poly pro, PVDF and PTFE. Seals are availble in EPDM or FKM. The adjusting bolt, lock nut and fasteners are stainless steel. The control spring is plated steel but no metal parts are in contact with liquid.
Series RVDT relief valves are available in Geon® PVC, Corzan® CPVC, Natural Polypropylene (virgin, unpigmented, unfilled PPL), Kynar® PVDF and PTFE body materials. The wetted diaphragm is PTFE energized by a non-wetted FKM diaphragm. Spring housing (not wetted) is PVC. Springs (not in wetted area) are zinc-plated steel, external fasteners are stainless steel. Lock nut and adjusting screw are HDPE on 1/4" - 1" sizes. Lock nut and adjusting screw are stainless steel on 1½" and 2" sizes. If your environment is incompatible with any of the external materials, or you are interested in some other type of body material, options are available on quantity or special orders.
The series RVDT angle pattern pressure relief valve features a single flat diaphragm which is an advantage where salt crystiallization problems can cause valve sticking. Relief setting is infinitely adjustable from 5 psi to 150 psi. The maximum inlet pressure in 210 psi. Availiable in PVC, natural poly pro, PVDF and PTFE. Seals are availble in EPDM or FKM. The adjusting bolt, lock nut and fasteners are stainless steel. The control spring is plated steel but no metal parts are in contact with liquid.
TW Series 3-Way ball valves are available in PVC and Corzan CPVC. O-rings are either FPM or EPDM and the seats are PTFE. Up to 2 in. sizes have socket and threaded end connections. All TW Series valves are assembled with silicone free lubricant. They are easy to maintain with a solid actuator mounting design for easy automation. TW series valves are available in standard and lateral configuration.
The R-K FPR series fluid pressure regulator is designed to protect piping systems and equipment from pressure changes. The adjustable screw and lock nut makes it easy to convert varying upstream pressure into accurate pre-set downstream pressure. Outlet pressure should be adjusted in a closed loop system within a range of 15-100 PSI. Top entry and parallel inlet and outlet ports to faciliate installation and avoid piping problems. This patented pressure reducing valve is designed to keep the stainless steel spring totally isolated from the fluid chamber insuring no metal contact with the fluid. It is ideally suited for systems that require additional pressure protection.
This compact valve features PTFE diaphragm with no wetted elastomers or metals. The PTFE diaphragm is backed with an elastomeric diaphragm to enhance flexibility and improve longevity. Valve bodies are available in Geon® brand PVC, natural unpigmented virgin polypropylene, Kynar® brand PVDF, and PTFE. This valve is ideal for high purity processes such as deionized water, as well as ultra-harsh chemicals not compatible with elastomers. Series BSDA is available in pipe sizes 1/4" through 1½", with threaded, socketed, and spigot ends.
This compact valve features PTFE diaphragm with no wetted elastomers or metals. The PTFE diaphragm is backed with an elastomeric diaphragm to enhance flexibility and improve longevity. Valve bodies are available in Geon® brand PVC, natural unpigmented virgin polypropylene, Kynar® brand PVDF, and PTFE. This valve is ideal for high purity processes such as deionized water, as well as ultra-harsh chemicals not compatible with elastomers. Series BSDA is available in pipe sizes 1/4" through 1½", with threaded, socketed, and spigot ends.
1" Pressure Bypass valve threaded PVC EPDM seals
The R-K Series MOV (manually operated valve) features a compact design to be used with a minimum of hand, foot or knee pressure. This allows one or both hands to be free for other tasks.
The R-K AOV series airvalve features a compact thermoplastic valve available in six models to handle a multitude of piping systems functions. This patented valve is designed so there is no metal contact with the fluid, and can be operated in any position. Air actuated at 40 to 80 PSI. Direct acting full flow with top entry for easy maintenance and minimum water hammer. Suitable for most harsh chemicals, pollution control, wet processing stations, plating equipment, chemical processing and water treatment applications.
1-1/2" Pressure Relief valve threaded PVC EPDM seals
Pressure relief valves are offered in PVC and corzan CPVC. Seals are FPM or EPDM. End connectins are threaded only. Pressure relief valves can be set fron 5 - 75 PSI. Minimum charge for setting pressure exists. Low pressure spring option is available. All valves are assempled with silicone lubricant. The valves are hand adjustable so tools are needed.
Pressure relief valves are offered in PVC and corzan CPVC. Seals are FPM or EPDM. End connectins are threaded only. Pressure relief valves can be set fron 5 - 75 PSI. Minimum charge for setting pressure exists. Low pressure spring option is available. All valves are assempled with silicone lubricant. The valves are hand adjustable so tools are needed.
The R-K FPR series fluid pressure regulator is designed to protect piping systems and equipment from pressure changes. The adjustable screw and lock nut makes it easy to convert varying upstream pressure into accurate pre-set downstream pressure. Outlet pressure should be adjusted in a closed loop system within a range of 15-100 PSI. Top entry and parallel inlet and outlet ports to faciliate installation and avoid piping problems. This patented pressure reducing valve is designed to keep the stainless steel spring totally isolated from the fluid chamber insuring no metal contact with the fluid. It is ideally suited for systems that require additional pressure protection.
The R-K NPR series pilot operated (remote) pressure regulator is ideal for hard to reach places and for situations where instant fluid pressure changes are needed (such as spraying or rinsing applications). When the valve is installed the pressure can be adjusted from 5-100 P.S.I. with an air pressure regulator to protect the system from pressure changes. It will provide accurate outlet flow if a series of pressure regulators are required for a system or operation. Wide working pressure range (5 to 100 PSIG) Top entry for easy in-line maintenance and a minimum water hammer. Air-to-open, spring to close.Molded bodies are standard for 1/2", 3/4", and 1" valves. Suitable for most harsh chemical applications.
Designed for highly corrosive and ultra-pure chemicals, this pressure regulator uses compressed air to control pressure with greater accuracy as compared to standard spring controlled models. Sizes 1/4", 1/2" and 3" are series PRA; sizes 3/4", 1", 1 1/2", and 2" are series PRAM. The PRA.PRAM will routinely handles inlet pressure up ro 150 PSI and accurately maintain a downstream pressure from 5 to 125 PSI. The design features two large are frictionless rolling diaphragms. Process pressure is applied to one of the diaphragms; air pressure is applied to the other. Because the air pressure can be maintained with more accuracy than the force provided by the spring, the PRA/PRAM offers greater sensitivity and less vairance from set pressure than any thermoplastic pressure regulator previously available.
Pressure relief valves are offered in PVC and corzan CPVC. Seals are FPM or EPDM. End connectins are threaded only. Pressure relief valves can be set fron 5 - 75 PSI. Minimum charge for setting pressure exists. Low pressure spring option is available. All valves are assempled with silicone lubricant. The valves are hand adjustable so tools are needed.
The series RVDT angle pattern pressure relief valve features a single flat diaphragm which is an advantage where salt crystiallization problems can cause valve sticking. Relief setting is infinitely adjustable from 5 psi to 150 psi. The maximum inlet pressure in 210 psi. Availiable in PVC, natural poly pro, PVDF and PTFE. Seals are availble in EPDM or FKM. The adjusting bolt, lock nut and fasteners are stainless steel. The control spring is plated steel but no metal parts are in contact with liquid.
Series RVDT relief valves are available in Geon® PVC, Corzan® CPVC, Natural Polypropylene (virgin, unpigmented, unfilled PPL), Kynar® PVDF and PTFE body materials. The wetted diaphragm is PTFE energized by a non-wetted FKM diaphragm. Spring housing (not wetted) is PVC. Springs (not in wetted area) are zinc-plated steel, external fasteners are stainless steel. Lock nut and adjusting screw are HDPE on 1/4" - 1" sizes. Lock nut and adjusting screw are stainless steel on 1½" and 2" sizes. If your environment is incompatible with any of the external materials, or you are interested in some other type of body material, options are available on quantity or special orders.
Series RVDT relief valves are available in Geon® PVC, Corzan® CPVC, Natural Polypropylene (virgin, unpigmented, unfilled PPL), Kynar® PVDF and PTFE body materials. The wetted diaphragm is PTFE energized by a non-wetted FKM diaphragm. Spring housing (not wetted) is PVC. Springs (not in wetted area) are zinc-plated steel, external fasteners are stainless steel. Lock nut and adjusting screw are HDPE on 1/4" - 1" sizes. Lock nut and adjusting screw are stainless steel on 1½" and 2" sizes. If your environment is incompatible with any of the external materials, or you are interested in some other type of body material, options are available on quantity or special orders.
The series RVDT angle pattern pressure relief valve features a single flat diaphragm which is an advantage where salt crystiallization problems can cause valve sticking. Relief setting is infinitely adjustable from 5 psi to 150 psi. The maximum inlet pressure in 210 psi. Availiable in PVC, natural poly pro, PVDF and PTFE. Seals are availble in EPDM or FKM. The adjusting bolt, lock nut and fasteners are stainless steel. The control spring is plated steel but no metal parts are in contact with liquid.
The R-K FPR series fluid pressure regulator is designed to protect piping systems and equipment from pressure changes. The adjustable screw and lock nut makes it easy to convert varying upstream pressure into accurate pre-set downstream pressure. Outlet pressure should be adjusted in a closed loop system within a range of 15-100 PSI. Top entry and parallel inlet and outlet ports to faciliate installation and avoid piping problems. This patented pressure reducing valve is designed to keep the stainless steel spring totally isolated from the fluid chamber insuring no metal contact with the fluid. It is ideally suited for systems that require additional pressure protection.
1-1/2" Pressure Bypass valve threaded PVC EPDM seals
The R-K Series MOV (manually operated valve) features a compact design to be used with a minimum of hand, foot or knee pressure. This allows one or both hands to be free for other tasks.
Series RVDT relief valves are available in Geon® PVC, Corzan® CPVC, Natural Polypropylene (virgin, unpigmented, unfilled PPL), Kynar® PVDF and PTFE body materials. The wetted diaphragm is PTFE energized by a non-wetted FKM diaphragm. Spring housing (not wetted) is PVC. Springs (not in wetted area) are zinc-plated steel, external fasteners are stainless steel. Lock nut and adjusting screw are HDPE on 1/4" - 1" sizes. Lock nut and adjusting screw are stainless steel on 1½" and 2" sizes. If your environment is incompatible with any of the external materials, or you are interested in some other type of body material, options are available on quantity or special orders.