Product type

Switch valve

Product description

 Swing check valve

Model

H44H-Pressure sealing swing type check valve

Nominal diameter

NPS 2”～48”(DN50～DN1250)

Operating temperature

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

Nominal pressure

CLASS 600～2500 （PN100～PN420）

Material

Main material: A216 WCB、WCC; A217 WC6、WC9、C5、C12、C12A、CA15; A351 CF8、CF8M、CF3、CF3M、CF8C; A352 LCB、LCC; A890 4A(CD3MN)、5A(CE3MN)、6A(CD3MWCuN); ASME B 148 C95800、C95500, etc.

Design standard

ASME B16.34、API 6D、API 594、BS 1868

Structural length

ASME B16.10

Connecting end

ASME B16.5、ASME B16.47、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, tap water engineering in urban construction, chemical engineering, etc.

Other remarks 1

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.

Other remarks 2

The pressure self-sealing type is adopted between valve body and bonnet for reliable sealing, where the higher the pressure is, the better the sealing performance would be.

Other remarks 3

Suitable for medium backflow prevention in pipeline or device

Other remarks 4

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.

Other remarks 5

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.