Description

Technical Specification 
Design and Manufacture Standard: ASME B*6.*4, HG/T ***4
Face-to-face Dimension: ASME B*6.*0 , GB/T ****1

Flange Standard: ASME B *6.5 ,GB/T ***9 ,DIN ,JIS
Inspection and Testing: API **8, GB/T ****7

Product Specification
Body Material: WCB, ASTM A**5 , CF8 ,CF8M

Lining Material: PTFE , PFA , PO ,FEP

Nominal Diameter: 1/2"**4"(DN*5~DN**0)
Pressure Range: Class**0 , PN*0 , PN*6

 

Product description:

1.FlyvalveLined check valves come in several forms, all of which fulfill the same basic purpose, namely to allow forward fluid flow, but to minimize backwards flow. They prevent the back-flow of liquids in pipelines, prevent siphoning of pumps and eliminates pump impeller rotation in opposite direction due to back-flowing media. Generally check valve is automatically working. Under the pressure function of one direction flow, the disc opens, while when the liquid backflows, the valve will cut the flow.

2.Flyvalve lined swing check valves H*4 have a disc that rotates or swings out of the fluid flow in the forwards flow direction, but that swings back against its seat to prevent backwards flow.

3.Flyvalve fully lined wafer swing check valve H*4 is of two piece construction with only one moving part, ideal for use in totally lined piping systems in corrosion applications. The valve can be mounted horizontally or vertically with upward flow.

4.Flyvalve lined ball check valve H*0 do not have a spring to help with valve closing, limiting their use to vertical lines with upwards forward flow. The solid PTFE ball at valve body lining guarantees that ball rolls into the seat due to gravitation. Self-cleaning effect due to permanent ball rotation, resistance against solid particles. 

5.It can sustain any corrosive medium in addition to the ??molten alkali metals and fluorine elements??. It is ideal products used in chlor-alkali, industrial in organic chemicals, metal and mining, nitrogen and phosphatic fertilizers, petroleum refining, pharmaceutical etc.

6.Lining material: PFA, FEP, GXPO etc.

7.Flyvalve lined check valves are available as per the needs of applications in additional sizes and other than standard materials.

 

Material Specification:

1.Body/Disc/Bonnet: A**6 WCB+Lining material; A**1 CF8/A**1 CF8M+Lining material; A**1 CF3/A**1 CF3M+Lining material

2.Ball: PTFE

3.Lining material: FEP; PFA; GXPO

4.Bolt: A**3 B7; A**0 B8; A**3 B8M