Combined Butterfly-Check Valve

Combined Butterfly-Check Valve

ZhengFeng Combined Butterfly-Check Valve is used for the inlet pipe of pump outlet and turbine.

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Application

Product Scope: NPS 20” ~ NPS56” , 10bar ~ 16bar


Features:

Full Pipe Size Flow Area

Absolutely Reliable, Gravity-powered Closing System & Hydraulic Control System

Two-Speed Closing Action Prevents Surge Pressures

The Valve can be Opened Using an Emergency Hand Pump

Prevent  Pump from Reversing when Power Cut


Face to Face Dimensions:AMSE B16.10

Flange End Dimension :AMSE B16.10

Coating: Fusion Bonded Epoxy Coating 

Inspection and Test:API 598 / ISO 5208 / EN 12226-2

Part

Material

EN Spec.

Body

Ductile Iron

EN-JS1050

Heavy Punch

Ductile Iron

EN-JS1050

Disc/Stem

Stainless Steel 420

Stainless Steel 431

BS970 420S37

BS970 431S29

Hydraulic Power Pack

Siemens or others

Commercial

For materials options not listed,consult factory.

ZhengFeng manufactures valves in more than 50 different alloys.

NPS

In

20

24

28

32

36

40

48

56

O

mm

400

400

400

400

400

400

400

500

N

mm

342

397

437

517

567

637

730

902

Q

mm

358

439

451

546

588

646

756

993

P

mm

1012

1067

1107

1187

1237

1307

1400

1582


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