Lug Dual Check Valves,High quality valves,retainless valves

Short Description:

Dual wafer valves

1- Casting & Forged Carbon Steel,Stainless Steel,Duplex,Special Materials

2- Lug Type

3- Metal seated

4- 150Lb & 2500Lb

5- 2”~24”

Product Detail

Product Tags

Product Description

Product description

Double-clack check valve


Hn76H-double-clack check valve

Nominal diameter

NPS 2”~24”(DN50~DN600)

Operating temperature

-29℃~593℃(the range of service temperature may vary for different materials)

Nominal pressure

CLASS 150~2500 (PN20~PN420)


Main material: A890 4A(CD3MN)、5A(CE3MN)、6A(CD3MWCuN);A216 WCB、WCC; A217 WC6、WC9;; A352 LCB、LCC; A、M35-1; ASME B 148 C95800、C95500;A351 CF8、CF8M、CF3、CF3M、CF8C,etc.

Design standard

API 6D、API 594、ASME B16.34

Structural length

API 6D、API 594

Connecting end

ASME B16.5、ASME B16.47、GB/T 9113

Test standard

API 598、ISO 5208、GB/T 26480、GB/T 13927

Operation method

The valve clack is automatically opened and closed under the medium force to prevent flowing to another direction.

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.

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

Short closing travel of valve clack, and small impact at valve closing; short structural length, most suitable for positions with limited mounting space

Other remarks 3

Suitable for medium backflow prevention in pipeline or device

Other remarks 4

Built-in pin roll, without external leakage point

Other remarks 5

Due to loading of spring, the valve clack can move flexibly without jamming, and has a good sealing performance.

Available retainer type and retainerless type

Independent spring design

A spring design of dual plate check valve(6” and larger) allows higher torque to be exerted against each plate with independent closing in response to the process stream.testing has proved this action provides about 20% improvement in valve life and 50% reduction in water hammer.Each of the dual plates has its own springs,which provide independent closing action

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