What does a check valve do?

It prevents reverse flow in a piping system.

Is a check valve one-way?

Yes, it only allows flow in one direction.

Can check valves be installed vertically?

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

Do check valves need maintenance?

Generally low-maintenance, but periodic checks help.

Where are check valves commonly used?

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

체크 밸브

DN250-PN16 Wafer Dual Plate Check Valve

Product Name Wafer Dual Plate Check Valve / Wafer Double Door Check Valve
Type/Series General Purpose (e.g., Series equivalent to Pegler V909, Oventrop, Honeywell Impact)
Nominal Diameter DN250 (10 inches)
Nominal Pressure PN16
End Connection Wafer Type Design, designed for installation between PN16 flanges (According to EN 1092-2, ISO 7005-2, or ASME B16.5 Class 150)
Design Structure Dual Plate / Double Door with Spring-Loaded Hinge

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DN80-PN40-RF Axial Check Valve

Nominal Size DN80
Pressure Rating PN40 (4.0 MPa / 40 bar / 580 psi)
Connection Type Flanged, Raised Face (RF)
Flange Standard EN 1092 1 (Type B1 or B2) / ASME B16.5 optional
Design Standard API 594 (Type B – wafer or lug) or manufacturer specific
Face to Face Dimension Wafer type: per API 594 / EN 558 Series 48 (approx. 60 – 70 mm)
Construction Axial flow – streamlined body, centre guided disc, spring assisted closure
Body Material WCB (Carbon Steel) / CF8M (316 SS) / Ductile Iron
Disc / Trim Stainless steel (CF8M) with optional Stellite hardfacing

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DN50-PN40-RF Axial Check Valve

Nominal Diameter (DN) 50 mm
Nominal Pressure (PN) 40 bar
Connection Type RF (Raised Face Flange)
Design Type Axial, Spring-Assisted
Applicable Media Water, Oil, Steam, Gas, etc.
Media Temperature Range -20°C ~ +200°C
Body Material Carbon Steel WCB / Stainless Steel 304 / 316
Disc Material SS 304/316 + Stellite hard-faced sealing
Seat Seal Metal Hard Seal / Soft Seal (PTFE)
Spring Material SS 316 / Inconel X-750
Flange Standard EN 1092-1 (PN40) / ASME B16.5 (Class 300)
Cracking Pressure ≤ 0.1 bar
Full Flow Pressure Drop ≤ 0.02 bar

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DN8-PN40 Y Pattern Lift Check Valve

Nominal Diameter (DN) DN8
Nominal Pressure (PN) PN40 (40 bar)
Body Configuration Y Pattern
Valve Type Lift Check (Spring-loaded)
Applicable Media Water, oil, gas, non-corrosive or mildly corrosive media
Temperature Range -20°C to +180°C (depending on sealing material)
End Connections Threaded / Socket Weld / Butt Weld (optional)
Flow Direction Unidirectional, arrow marked on body

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2″-2500LB Inconel 625 Lift Check Valve

Nominal Size 2″ (DN50)
Pressure Rating Class 2500 (PN 420)
Valve Type Lift Check Valve – Automatic Non Return
Body Construction Pressure Seal Bonnet (recommended for Class 2500)
End Connections Flanged – ASME B16.5 Class 2500, Ring Type Joint (RTJ) facing standard
Temperature Range –196°C ~ +650°C (depending on trim)
Suitable Media Sour gas, seawater, high pressure steam, superheated water, corrosive chemicals, acidic environments
Flow Direction Horizontal (preferred) or vertical with upward flow

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1″-600LB-SW Close Die Forged Lifting Check Valve

Valve Type Lifting Check Valve (Piston / Disc Type)
Nominal Size 1 inch (DN25)
Pressure Rating Class 600
Connection Type Socket Weld (SW) Ends
Body / Bonnet Material ASTM A105 (Carbon Steel) or ASTM A182 F316 (Stainless Steel)
Operation Automatic (Flow-dependent)

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