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เช็ควาล์ว

  • Rubber seated resilient dual plate check valve
    วาล์วตรวจสอบแผ่นคู่ยืดหยุ่นนั่งยาง
    ภาพถ่ายแสดงข้อมูลจำเพาะดังต่อไปนี้
    ขนาด:DN100
    คะแนน:PN16
    ตัวถังและฝากระโปรง : ASTM A536 65-45-12
    แผ่น: ASTM A536 65-45-12
    เพลา: 416SS
    เบาะนั่ง: EPDM
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  • 125Lb Bronze Seated Swing Check Valve-MSS SP-71
    125Lb Bronze Seated Swing Check Valve-MSS SP-71
    Valve Type Swing Check
    Body Material Cast Iron (ASTM A126 Class B) / Ductile Iron (ASTM A536)
    Disc Material Cast Iron / Ductile Iron
    Seat Material Bronze Alloy (e.g., ASTM B62 C83600)
    Connection Type Flanged
    Flange Standard ASME B16.1 (Cast Iron) / ASME B16.5 (Class 125/150)
    Pressure Rating Class 125 / Class 150
    Temp. Range -10°C to +200°C
    Media Water, Steam, Oil, Gas, other non-corrosive fluids
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  • CPVC True Union Ball Check Valve
    เช็ควาล์วบอลยูเนี่ยนทรู CPVC
    ประเภท: 2 ทาง, สหภาพแท้, เช็ควาล์วลูกบอลลอย
    การทำงาน: การทำงานอัตโนมัติ (ไม่ต้องใช้การกระตุ้นจากภายนอก)
    มาตรฐานการออกแบบ: ASTM D1784 (มาตรฐานวัสดุ CPVC)
    การเชื่อมต่อปลาย: ซ็อกเก็ต (ซีเมนต์ตัวทำละลายสำหรับท่อ CPVC)
    ขนาด: 2” (DN50)
    ระดับแรงดัน: 150 ปอนด์ (เหมาะสำหรับระบบท่อ CPVC)
    ช่วงอุณหภูมิ: -20°C ถึง +120°C
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  • Plumbing brass check valve
    เช็ควาล์วทองเหลืองสำหรับงานประปา
    ภาพถ่ายแสดงข้อมูลจำเพาะดังต่อไปนี้
    ขนาด:DN25
    คะแนน:PN16
    ตัวเรือนและฝากระโปรง : ทองเหลือง
    แผ่น: ทองเหลือง
    แกน: ทองเหลือง
    ที่นั่ง: ทองเหลือง
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  • API 6D/594 Standard Swing Check Valve
    API 6D/594 Standard Swing Check Valve
    Valve Type Swing Check Valve (Full Bore)
    Design Standard API 6D (24th Edition)
    Pressure Standard ASME B16.34
    Face-to-Face ASME B16.10 / API 6D Table 8
    End Connection RF Flanges (ASME B16.5) or BW Ends (ASME B16.25)
    Fire Safe Design API 607 / API 6FA (Optional)
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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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  • 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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  • 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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  • 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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  • 1/2″-800LB Close Die Forged Lift Check Valve
    1/2″-800LB Close Die Forged Lift Check Valve
    Valve Type Lift Check Valve
    Design Standard API 602 / ASME B16.34 / BS 5352
    Nominal Size 1/2 inch (DN15)
    Pressure Class Class 800 LB (PN130)
    Structure Type Lift Type, Bolted Bonnet
    Connection Type NPT Threaded (ASME B1.20.1) or Socket Weld (ASME B16.11)
    Installation Horizontal Piping
    Body Material ASTM A105N (Forged Carbon Steel)
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  • CF3M Wafer Dual Plate Check Valve
    CF3M Wafer Dual Plate Check Valve
    Pressure Rating PN16 (Equivalent to Class 150)
    Nominal Size DN50 – DN600 (NPS 2″ – 24″) Specify as required
    End Connection Wafer Type / Lug Type Select as required
    Face to Face Dimension API 594 / EN 558 Series 20
    Sealing Type Metal-to-Metal Hard Seal
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  • DN400-PN16-RF Metal Seated SS Swing Check Valve
    DN400-PN16-RF Metal Seated SS Swing Check Valve
    Nominal Size DN400
    Pressure Rating PN16 (1.6 MPa / 16 bar)
    End Connection Flanged, Raised Face (RF) — EN 1092 1 / ASME B16.5 or equivalent
    Body Construction Swing check, metal seated, with external counterweight mechanism
    Temperature Range –29°C ~ +400°C (depending on seat hardfacing material)
    Applicable Media Water, steam, oil, corrosive fluids, high temperature services
    Flange Standard EN 1092 1 PN16 / ASME B16.5 Class 150 (customer specified)
    Face to Face EN 558 Series 1 / ASME B16.10 / API 6D
    View details

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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