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  • DN15-PN16 Close Die Forged Lift Check Valve
    DN15-PN16 Close Die Forged Lift Check Valve
    Design Standard DIN 3356
    Nominal Size DN15
    Pressure Class PN16
    Structure Type Lift Type, Bolted Bonnet
    Connection Type Welded Flange
    Installation Horizontal Piping
    Body Material ASTM A105 (Forged Carbon Steel)
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  • Standard Dual Plate Check Valve
    Standard Dual Plate Check Valve
    Design Standard API 594 / API 6D / ASME B16.34 / ISO 5752
    Face-to-Face API 594 Short Pattern / ISO 5752 Series 20
    Flange Drilling ASME B16.5 / ASME B16.47 / EN 1092-2
    Inspection & Test API 598 / ISO 5208 / EN 12266-1
    Pressure Rating Class 150 / 300 / 600 / 900 / 1500 / 2500
    Size Range 2″ – 60″ (DN50 – DN1500)
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  • Seawater Service Dual Disc Check Valve
    Seawater Service Dual Disc Check Valve
    Valve Type Double Plate Wafer Check Valve (Dual Plate Check Valve)
    Nominal Size DN300 (12 inch)
    Pressure Rating 150 LB (Class 150)
    End Connection Wafer Type (Fits between ASME B16.5 Flanges)
    Design Structure Dual Plate / Non-Slam
    Medium Water, Oil, Gas, and Mild corrosive media
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  • PN16 Ball Check Valve
    PN16 Ball Check Valve
    Valve Type Ball Check Valve (Free Floating Ball Design)
    Body Material Ductile Iron (ASTM A536 Grade 65-45-12 / GGG-50)
    Ball Material Carbon Steel + Fully Lined EPDM
    Nominal Size 2″ – 12″ (DN50 – DN300)
    Pressure Rating Class 125 / Class 150 / PN10 / PN16
    End Connection Flanged (FF / RF) / Threaded (NPT / BSP)
    Design Standard API 594 / Manufacturer Standard
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  • CPVC True Union Ball Check Valve
    CPVC True Union kogelterugslagklep
    Type: 2-weg, echte verbinding, drijvende kogelterugslagklep
    Werking: Zelfwerkend (geen externe aandrijving vereist)
    Ontwerpnorm: ASTM D1784 (CPVC-materiaalnorm)
    Eindverbinding: mof (oplosmiddelcement voor CPVC-leidingen)
    Maat: 2” (DN50)
    Drukklasse: 150 lb (geschikt voor CPVC-leidingsystemen)
    Temperatuurbereik: -20°C tot +120°C
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  • Plumbing brass check valve
    Loodgietersmessing terugslagklep
    FOTO TOONT ​​SPECIFICATIES ZOALS HIERONDER
    MAAT: DN25
    BEOORDELING: PN16
    CARROSSERIE EN MOTORKAP: MESSING
    SCHIJF: MESSING
    STAM: MESSING
    ZETEL: MESSING
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  • Fully Rubber Lined Dual Plate Check Valves
    Fully Rubber Lined Dual Plate Check Valves
    Valve Type Dual Plate Wafer Check Valve
    Design Type Wafer, Dual Plate (Spring-loaded tilting disc)
    Nominal Size (DN) DN50 ~ DN600 (2″ ~ 24″)
    Pressure Rating PN10 / PN16 / PN25; Class 125LB / 150LB
    End Connection Wafer Type (clamped between flanges)
    Face-to-Face Standard API 594 / ISO 5752 / EN 558
    Design Standard API 594 / JB/T 8937 / DIN 3356
    Testing Standard API 598 / GB/T 13927 / ISO 5208
    Certification CE, WRAS, ACS and other certifications available
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  • Full Internal Rubber Lined Dual Plate Check Valve
    Full Internal Rubber Lined Dual Plate Check Valve
    Available Size Range 2″ – 48″ (DN50 – DN1200)
    Pressure Class ASME Class 150 / PN 10, PN 16 (standard); Class 300 on request
    Body Type Wafer, Dual Plate
    Body Base Material CF8M (ASTM A351 Gr. CF8M) — Cast equivalent of AISI 316 Stainless Steel
    Internal Lining Material EPDM Rubber (Ethylene Propylene Diene Monomer)
    Lining Coverage Full internal coverage: body bore, disc surfaces, hinge pin, spring housings, and seal faces
    Lining Thickness 3 mm – 5 mm (uniform, non-porous, vulcanized / bonded)
    Disc Base Material CF8M (ASTM A351 Gr. CF8M), fully encapsulated in EPDM
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  • Axial Silent Check Valve
    Axial Silent Check Valve
    Size Range DN50 – DN600 (2″ – 24″)
    Pressure Ratings PN10 / PN16 / Class 125 / Class 150 / Class 300
    Design Standards API 594, ASME B16.34, ISO 5752
    Face-to-Face Dimensions ASME B16.10, EN 558, API 609, BS 5155, DIN 3202
    Flange Accommodation ASME B16.42, DIN PN10/PN16, BS 4504, ISO 7005
    End Connections Wafer type, flanged (RF, FF), plain face
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A check valve, also known as a non-return valve, is a type of valve that allows fluid or gas to flow in one direction only, preventing backflow that could damage equipment or disrupt system performance. It operates automatically and doesn’t require manual or external control. Inside the valve, a disc or similar mechanism opens when fluid flows in the intended direction and closes if the flow reverses. There are several types of check valves, such as swing, lift, ball, and diaphragm types, each designed for specific applications or media. For instance, swing check valves are commonly used in water and wastewater systems, while lift check valves are more suitable for high-pressure lines. Check valves are critical in protecting pumps, compressors, and pipelines from backflow damage, maintaining pressure, and preventing contamination. Their simple, self-operating design makes them ideal for both industrial and domestic use, especially in systems where reliability and safety are essential.

Why Are Check Valves Important In Piping Systems?

Check valves are essential components in piping systems because they automatically prevent reverse flow, which can cause serious issues such as water hammer, pressure drops, contamination, and equipment failure. In systems involving pumps, check valves ensure that the fluid only moves in the desired direction, thereby avoiding potential damage when the pump shuts down or pressure fluctuates. They are especially important in systems with vertical piping or in applications where back pressure is a concern. Additionally, check valves contribute to system efficiency by maintaining line pressure and reducing the load on pumps and compressors. Their ability to operate without human intervention also makes them reliable safety devices in both high-pressure and low-pressure systems. Whether used in water treatment, oil and gas, HVAC, or chemical processing, check valves play a vital role in maintaining flow control, system integrity, and operational safety.

Check Valves FAQ

  • 1.What does a check valve do?

    It prevents reverse flow in a piping system.

  • 2.Is a check valve one-way?

    Yes, it only allows flow in one direction.

  • 3.Can check valves be installed vertically?

    Yes, but only certain types like lift or spring-loaded ones.

  • 4.Do check valves need maintenance?

    Generally low-maintenance, but periodic checks help.

  • 5.Where are check valves commonly used?

    Pumps, pipelines, HVAC, water treatment, and chemical systems.

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