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Dual flap wafer check valve WAFER DOUBLE DOOR CHECK VALVE
Size DN40-DN600 PN10/16/25 ANSI Class 125/150/250
Dongsheng cast iron wafer body double disc check valves have pin retainer holes in the body where plugs are inserted to hold the hinge pin and stop pin in place. Dongsheng offers a retainerless wafer body design in ductile iron, stainless steel, and other specially cast alloys .
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
Materials Structure:
Body:GG-25 Gray cast iron
Disc: 316 Stainless steel , GGG40 ductile iron
Connection:
Wafer type
Nominal Diameter:
DN40 (1.5”) – DN600 (24”)
Working Pressure:
Up to 16 bars
Working Temperature
-10°C to 120°C for EPDM seat
-10°C to 80°C for NBR seat
-10°C to 150°Cfor Viton seat
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
NO. |
Parts |
MATERIAL |
1 |
Body |
Cast iron GG25 / Stainless Steel |
2 |
Disc |
AISI 316 / chrome coated GGG40 |
3 |
Resilient seat |
EPDM |
4 |
Hinge pin |
AISI 316 |
5 |
Spring |
AISI 304 |
6 |
Retainer screw |
Carbon steel |
7 |
Disc bearing |
Teflon |
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