Check Valves

Swing Check Valve - ZRK / ZRKF | AWS

AWS ZRK / ZRKF – Wafer Type Swing Check Valve The AWS ZRK and ZRKF are wafer-type swing check valves designed for installation directly between flanges. The ZRK operates via disc weight, while the ZRKF incorporates a return spring for controlled closure in non-horizontal or dynamic flow conditions. No actuator is used. Technical Data ZRK: DN32–DN1000....

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Swing Check Valve - RSK 920 | AWS

AWS

AWS RSK 920 – Plastic Wafer Check Valve The AWS RSK 920 is a wafer-type check valve designed for direct installation between flanges. Constructed from industrial-grade plastics, it is available with or without a return spring. The disc opens when flow force exceeds the disc weight and, if present, the spring force. The valve closes against the seat upon...

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Swing Check Valve - RSK 925.1 | AWS

AWS

AWS RSK 925.1 – Plastic Wafer Check Valve (Clapper Type) The AWS RSK 925.1 is a wafer-type check valve with clapper, constructed from PVC-U. It is designed for straightforward water applications, including swimming pools and building services. The valve is installed between flanges and operates via differential fluid pressure, without the need for an...

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Dual Plate Check Valves - 915 | AWS

AWS

AWS 915 – Dual Plate Check Valve The AWS 915 is a dual plate check valve designed for installation between flanges. The two plates open when flow force exceeds the spring closing force and close automatically upon pump shutdown or reverse flow. No actuator is required. Technical Data Sizes: DN50–DN900 / 2"–36" Flange compatibility: PN10, PN16, PN25, PN40...

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Dual Plate Check Valves - 916 | AWS

AWS

AWS 916 – Dual Plate Retainerless Check Valve The AWS 916 is a dual plate check valve with a retainerless body design, meaning there are no external shaft retention penetrations through the body. This configuration reduces potential external leakage points. The valve is suitable for industrial liquid or gas lines without solid particles. Operation is...

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Disc check valve DN 15-100 - 932 | AWS

AWS

AWS 932 DN15–DN100 – Wafer Spring-Loaded Disc Check Valve The AWS 932 is a wafer-type check valve designed for installation between flanges. It features a guided disc and return spring. Operation is automatic: the disc opens when flow force exceeds the closing force and closes upon reverse flow or pump shutdown. No actuator is used. Technical Data Sizes:...

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Disc check valve DN 125-300 - 932 | AWS

AWS

AWS 932 DN125–DN300 – Disc-Spring Check Valve The AWS 932 DN125–DN300 is a wafer-type check valve with a spring-loaded disc, designed for installation between flanges. It is suitable for liquid and gas media without solids, where short face-to-face dimensions and automatic closure on reverse flow or pump shutdown are required. No actuator is provided or...

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Disc check valve DN 15-100 - 932-HD | AWS

AWS

AWS 932-HD DN15–DN100 – High-Pressure Wafer Disc Check Valve The AWS 932-HD is a wafer-type spring-loaded disc check valve designed for high-pressure pipelines. It is installed between flanges and operates automatically based on differential fluid pressure; no actuator is required. The 932-HD series covers DN15–DN100 and is rated for operating pressures...

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Disc check valve DN 15-100 - 930 | AWS

AWS

AWS 930 – Spring-Loaded Wafer Check Valve The AWS 930 is a wafer-type disc check valve designed for installation between flanges. The disc opens under differential pressure and closes via a spring mechanism when inlet pressure drops or reverse flow occurs. No actuator is used; closure is automatic by spring force. Technical Data Sizes: DN15–DN100...

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Disc check valve DN 15-100 - 931 | AWS

AWS

AWS 931 – Spring-Loaded Disc Check Valve The AWS 931 is a wafer-type spring-loaded disc check valve designed for installation between flanges. The disc opens under differential pressure and closes via a spring mechanism when flow decreases or reverses. No actuator is provided. Intended for use with clean liquids and gases free of solids. Technical Data...

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Disc check valve DN125-200 - 931 | AWS

AWS

AWS 931 DN125–DN200 – Spring-Loaded Disc Check Valve The AWS 931 DN125–DN200 is a wafer-type check valve with a guided disc and return spring, designed for installation between flanges. It is intended to prevent reverse flow in liquid and gas media free of solids. The valve operates automatically via differential pressure; no actuator is used. Technical...

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Disc check valve DN 15-100 - 936 | AWS

AWS

AWS 936 DN15–DN100 – Plastic Wafer Disc Check Valve The AWS 936 is a spring-loaded wafer-type disc check valve designed for installation between flanges according to DIN EN 1092-1 B1 PN10. This series is intended for plastic piping systems or low-pressure chemical networks where reverse flow prevention is required without the use of actuators. Materials...

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Dual Plate Check Valve | Neway

Neway

Neway Dual Plate Check Valve The Neway dual plate check valve is designed for backflow prevention in industrial piping systems. It features two spring-loaded plates that open under differential pressure and close rapidly with independent torsion springs. No actuator is required; operation is automatic based on flow conditions. Construction Range Size:...

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Swing Check Valve - Cryogenic | Neway

Neway

Neway Cryogenic – Swing Check Valve The Neway Cryogenic swing check valve is designed for cryogenic liquid or gas lines. It operates automatically via process flow and reverse pressure, with no actuator required. Typical media include LNG, liquid nitrogen, oxygen, argon, and other cryogenic utilities. Oxygen service valves are supplied with certified...

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Swing Check Valve - Forged Steel | Neway

Neway

Neway Forged Steel – Forged Check Valve (Piston & Swing Type) The Neway Forged Steel check valve is designed for small-bore, high-pressure lines in industrial process systems. Product range covers NPS 1/2"–2" / DN15–DN50, pressure ratings ASME Class 150–4500 / PN16–PN760, and end connections RF, BW, RTJ, SW, NPT. Construction & Variants According...

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Swing check valve with pressure seal - UNIFLOW Fig. 31 | Comeval

Comeval

Comeval UNIFLOW Fig. 31 – Swing Check Valve, Pressure Seal The Comeval UNIFLOW Fig. 31 is a pressure seal swing check valve designed for high-pressure pipelines. The disc opens with flow and closes automatically when the differential pressure drops or reverses. No actuator is required. Metal-to-metal sealing is standard, with a pivoted disc construction...

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Cast swing check valves - UNIFLOW Fig. 3S | Comeval

Comeval

Comeval UNIFLOW Fig. 3S – Cast Swing Check Valve The Comeval UNIFLOW Fig. 3S is a swing check valve with a hinged disc and metal seat, designed to prevent reverse flow in process piping. Operation is automatic, actuated by the process medium without external actuator. The 3S construction is cast, with a bolted cover and internal access for seat/disc...

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Ansi forged swing check valves extract catalog api din - Fig. 39 | Comeval

Comeval

Comeval UNIFLOW Fig. 39 – Forged Swing Check Valve The Comeval Fig. 39 is a forged swing check valve with a hinged disc and metal seat, designed to prevent reverse flow in small-bore pipelines. Operation is automatic, actuated by process flow without external actuators. The range covers DN10–DN50 / 3/8"–2", with pressure ratings PN16–PN420 / ANSI Class...

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Axial Check Valves | Cast Flow

Cast Flow Valves

Cast Flow Axial Disc Check Valve The Cast Flow Axial Disc Check Valve is designed for axial disc movement with a return spring. Flow remains aligned with the pipeline axis, and the short disc travel enables rapid closure when flow decreases or reverses. This configuration is primarily used to limit reverse flow and mitigate hydraulic shock (water hammer)...

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Ball Check Valves | Cast Flow

Cast Flow Valves

Cast Flow Ball Check Valves Cast Flow ball check valves are designed for use in clean water, wastewater, and viscous fluid lines. The check mechanism consists of a free-moving ball that responds to differential pressure, sealing against the seat when flow decreases or reverse pressure occurs. No actuator is required for operation. Versions and...

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Dual Plate Check Valves | Cast Flow

Cast Flow Valves

Cast Flow Dual Plate – Dual Plate Check Valve The Cast Flow Dual Plate is a spring-loaded check valve, available in wafer or flanged design, engineered to prevent reverse flow in liquid or gas pipelines. The two plates open under differential pressure and close via springs, without external actuators. Typical applications include pump stations, potable...

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Retainerless Dual Plate Check Valve | Cast Flow

Cast Flow Valves

Cast Flow Retainerless Dual Plate Check Valve The Cast Flow retainerless dual plate check valve is designed without external shaft retention penetrations in the body, minimizing potential leakage paths to atmosphere. This construction is specified for oil & gas, steam, and process vapor applications where fugitive emissions must be controlled. Discs...

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Rubber Lined Dual Plate & Ball Check Valve | Cast Flow

Cast Flow Valves

Cast Flow Rubber Lined – Rubber Lined Check Valve The Cast Flow Rubber Lined series includes ball check, dual plate, and retainerless dual plate variants with internal rubber lining. This construction is specified where corrosion or abrasion resistance is required via lining rather than full alloy body. Operation is automatic, actuated by differential...

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Foot Check Valves | Cast Flow

Cast Flow Valves

Cast Flow Foot Valve with Check Valve Function The Cast Flow foot valve integrates a check valve with a suction strainer basket. It is installed at the pump suction line inlet to prevent ingress of large solids and to maintain pump priming after shutdown. The assembly is not intended as a process filter; the basket retains coarse debris, while fine...

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