Body SS304 Wafer Check Valve 2'' PN10 Seat EPDM High Safety And Reliability
Size Range: DN100-DN2000
Body Materials: Ductile Iron QT450
Seat Materials: EPDM
|Product Name||CHECK VALVE|
|Standard||DIN GB JIS ANSI|
|Body and Ball Material||CF8 CF3 CF8M CF3M WCB PVC UPVC PP|
|Thread||-29~150(PTFE), -29~200( PTFE+GLASS), -29~300(J2 PPL)|
|Steam Seat and Gasket||PTFE|
Applicable medium:Water,Oil, etc
Application field: Water treatment, municipal construction, drainage, power plant, etc
1. QT450-10 or WCB valve body,the chemical composition and mechanical properties meet the the national standard,
material report can be provided;
2.All parts are processed by precision CNC machine tools to ensure product accuracy;
3.Excellent performance of slow closing system, not affected by the medium in the pipeline. The valve disc closes quickly
first and than slowly closes to prevent destructive water hammer;
4. Rubber seals or stainless steel hard seals, smooth opening and closing, no vibration, no noise, valve discs and other parts
can also be selected according to working conditions;
5.Valve shaft is supported by self-lubricating sleeve bearings to reduce friction and torque;
6.250μm thickness Akzo epoxy coating;
7.Each valve will be inspected for shell and seal pressure before leaving factory.
Stainless Steel Check Valve Application:
Valve is used for preventing the back-going of medium in pipelines and equipments, and the pressure of medium will bring the result of opening and closing automatically.
When the medium is back-going, valve disc will automaticaly closed to avoid accidents.
Stainless Steel Check Valve Test Pressure
|Test Item||Shell Test||Seal Test||Back Seal Test||Air Seal Test|
Types of Valves
The type of disk will decide the type of valve. Most common types of Check valves are
Dual Plate Type
Stop Check Valve
Swing Check Valve
The disc in a swing type valve is unguided as it fully opens or closes. This Valve operates when there is flow in the line and get fully closed when there is no flow. Turbulence and pressure drop in the valve is very low.
Disk and seat designs can be of metal to metal or metal to composite.
The angle between the seat and the vertical plane is known as the seating angle and varies from 0 to 45 degrees.
Usually, the seat angles are in the range of 5 to 7 degrees. Larger seat angles reduce the disc travel, resulting in quick closing, thus minimizing the possibility of water hammer. A vertical seat has a 0-degree angle.
The swing type valve allows full, unobstructed flow and automatically closes as pressure decreases. Usually installed in combination with gate valves because they provide relatively free flow combinations.
A basic swing type valve consists of a valve body, a bonnet, and a disk that is connected to a hinge.
1. Executive standard:
|Name||Design and manufacture||Face to face Length||End Flange||Pressure Test|
|GB/T 12238||GB/T 12221||GB/T 17241.6||GB/T 13927|
2. Material of Main Parts:
Contact Person: Ms. TOBO
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