Check Valves

Disc check valve DN 15-100 - 930 | 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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High Pressure Check Valve | Cast Flow

Cast Flow Valves

Cast Flow HP Dual Plate – High Pressure Dual Plate Check Valve The Cast Flow HP Dual Plate is a dual plate check valve designed for installation between flanges in piping systems where short face-to-face dimensions and prevention of reverse flow at elevated pressure ratings are required. The two plates open under differential pressure and are returned by...

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Nozzle Check Valves | Cast Flow

Cast Flow Valves

Cast Flow Nozzle Check Valve The Cast Flow Nozzle is an axial flow check valve with a short-stroke disc and return spring. The nozzle-type geometry channels flow through a Venturi effect, reducing pressure drop compared to conventional swing or dual plate designs, depending on body size and configuration. Operation is driven by differential pressure; no...

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Non-Surge Aviation Fuel Check Valve - 81AF-8 | Cla-Val

Cla-Val

Cla-Val 81AF-8 Non-Surge Aviation Fuel Check Valve The Cla-Val 81AF-8 is a hydraulically operated check valve designed for aviation fuel distribution lines. It incorporates a controlled opening feature to minimize pressure transients (surge) during operation. The valve is based on the 100-34 Hytrol main valve (reverse flow configuration) and includes two...

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Non-Return Valves - Double Leaf Valve type CD | Mei

Mei Valvole

MEI CD – Dual Plate Check Valve The MEI CD is a twin flap (dual plate) check valve designed for installation between flanges. The two plates open under differential flow pressure and close via spring return when flow decreases or reverses. No actuator is required; operation is fully mechanical. Construction and Connections Standard design: wafer,...

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Non-Return Valves Disc Valve type DCEL | Mei

Mei Valvole

MEI DCEL – Disc-Spring Wafer Check Valve The MEI DCEL is a wafer-type disc check valve designed for installation between flanges. The disc opens under differential flow pressure and is returned to the closed position by a spring when flow decreases or reverses. No actuator is required for operation. Technical Data Type: disc valve, wafer pattern Sizes:...

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Non-Return Valves - Clapet Valve type CS | Mei

Mei Valvole

MEI CS – Wafer Type Swing Check Valve The MEI CS is a wafer swing check valve with a self-centering design for installation between flanges. The disc opens via differential flow pressure and closes when flow decreases or reverse pressure occurs. No actuator is required for operation. Technical Specifications Size Range: DN32–DN350 Connection: wafer /...

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Non-Return Valves - Clapet Valve type CV | Mei

Mei Valvole

MEI CV – Wafer Type Swing Check Valve The MEI CV is a wafer-type swing check valve, self-centering, designed for installation between flanges. The disc opens by differential flow pressure and closes when flow decreases or reverse pressure occurs. No actuator is required for operation. Technical Specifications Size Range: DN32–DN800 (refer to technical...

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Non-Return Valves - Valve With Counterweight type CC | Mei

Mei Valvole

MEI CC – Counterweight Wafer Check Valve The MEI CC is a wafer-type check valve with an external counterweight, designed for large diameter pipelines where adjustable opening pressure is required to match actual process conditions. The disc opens via differential flow pressure and closes when flow decreases or reverses. No actuator is used; closure is...

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