Product description

Swing Check Valve

Model

H44H-Swing Check Valve

Nominal diameter

2″～50″

Operating temperature

-196℃～593℃(the range of service temperature may vary for different materials)

Operating pressure

150-2500 CLASS

Material

Main material: A216 WCB, WCC; A217 WC6, WC9, C5, C12, C12A, CA15; A351 CF8, CF8M, CF3, CF3M, CF8C,   CN3MN, CK3MCUN, CN7M; A352 LCB, LCC; A494 CW-6MC, CU5MCuC, M35-1; A995 4A(CD3MN) , 5A(CE3MN) , 6A(CD3MWCuN); ASME B 148 C95800, C95500, etc.

Design standard

API 6D, API 594, BS 1868, ASME B16.34

Structural length

API 6D, ASME B16.10

Connecting end

ASME B16.5, ASME B16.25

Test standard

API 598, ISO 5208

Operation method

The valve clack can be automatically opened and closed with the medium force, movement weight can be increased to facilitate fast closing of valve clack, hydraulic cylinder can be increased to facilitate slow closing of valve clack to prevent vibration of pipeline, and pigging can be performed through manual opening and locking the valve clack at the opening position.

Application fields

For application in fields such as electric power industry, petroleum refining, petrochemical engineering, offshore oil, tap water engineering in urban construction, chemical engineering, etc.

Technical characteristics

The sealing faces of valve seat and valve clack are build-up welded with hard alloy to improve the erosion resistance and extend the service life of valve.

SS+ graphite or metallic seal or pressure self-sealing is adopted between valve body and bonnet for reliable sealing.

Suitable for medium backflow prevention in pipeline or device

Large check valves are designed with hydraulic damping cylinder to prevent the valve clack from bumping the valve seat, damaging the valve or causing pipeline vibration due to fast closing.

In case of pigging requirement, API 6D swing check valve can be manually operated to fix the opening position of valve clack, so as to achieve the pigging objective.