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Main Features:
DONGSHENG Dual Flap Wafer Check Valve is designed to operate with the minimum of flow restriction.
The twin spring loaded half disc operate with the pipeline flow and reseal back against the rubber disc seating providing a positive shut off against any back flow. The resilient seating prevent a slamming action.
Check Valves offer greater flexibility and low cost in most piping systems and moreover, of its light weight, it is so convenient to install and has smaller face to face dimension than conventional swing check valve.
These valves can be supplied to match the international standards of flange (DIN, ANSI, JIS & BS).
DongSheng check valves when compared with order traditional isolating valve such as swing check valve offer the following advantages:
Low purchase cost
Compact design
Non-slam principle of operation
Light weight
Easy installation
Good flow characteristic and less pressure drop
Suitable for horizontal and vertical up flow
Typical Applications:
Heating air-conditioning pipe lines
High frequency lines
Fire extinguishing system
Vessel pipelines
Iron and steel industry
Mineral, oil industry
Wood working, pulp and paper industry
Textile industry
Water and condensate lines
Applicable fluids:
Water, warm water, sea water, air and weak acid
Material List
Item
Description
Available  materials
1
Body
Grey cast iron GG25; Ductile ironGGG40; CF8M
2
Spring
Stainless steel 316
3
Door
Stainless steel 316,304; Al.Bronze; Carbon steel
4
Lifting Eye Bolt
 Steel
5
Seat Gasket
BUNA-NÂ Â RESILIENT SEAT MOLDED TO BODY
6
Hinge pin
Stainless steel 316
7
Stop pin
Stainless steel 316
8
Gasket
Teflon
9
Stop pin retainer
 Steel
10
Hinge pin retainer
 Steel
Dual Flap Wafer Check Valve
Model NO.: H741X-10Z
Flow Direction: Unidirection
Standard: JIS
Application: Industrial Usage, Water Industrial Usage
Size Range: Dn40-Dn600
Seat: Metal/ EPDM / Buna-N/ Vion
Class: ANSI 125 / 250
Flange: DIN,AISI,JIS,Bs
Brand: as Per Your Request
Advantage: Long Working Life Without Leakage
Trademark: DS
Specification: Quality Grade: CE, SGS and ISO9001
Origin: Laizhou Yantai City, Shandong Province, China
HS Code: 8481804090
DUAL FLAP WAFER CHECK VALVE