China Lined Valve Manufacturers & Suppliers

PTFE PFA FEP Lined Dual Plate Wafer Check Valve

Place of Origin:
Suitable Packing for Sea/Air Transport
Wafer Type
PTFE:-29℃ ~180℃, PFA:-29℃~200℃, FEP:-29℃~150℃
PTFE PFA FEP Lined Dual Plate Wafer Check Valve

FVF PTFE PFA FEP Lined Dual Plate Wafer Check Valve

  • The dual plate check valve is an all purpose non return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing check valve or lift check valve. The double plate check valve employs two spring-loaded plates hinged on a central hinge pin.
  • In addition to the valve body and valve disc, the return spring is also fully lined with corrosion-resistant fluorine materials. The reasonably designed spring enables the valve disc to generate sufficient sealing specific pressure in the low-pressure area.And it ensures the reliability of the valve sealing in the low pressure area.
  • FVF lined check valve is mainly used in chemical industries,such as sulfuric acid, alkali etc.

Product Parameter

Materials of Main Parts

No. Part Name Material List
1 Body/Bonnet HT250 WCB CF8 CF8M CF3 CF3M
2 Disc/Stem 25                                           1Cr18Ni19/CF8                            00Cr17Ni14Mo2/CF3M
3 Lining/Seat PCTFE(F3)          FEP(F46)          PTFE(F4)          PFA          PO
4 Bolt 35 35 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9
5 Nut 45 45 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9

Technical Specification

Design & Manufacture Standard GB/T 12236 API 6D
Face-to-face Dimension Standard GB/T 12221 ASME B16.10
Flange Standard HG/T 20592 ASME B16.5
Inspection and Test Standard GB/T 13927 API 598
Nominal Pressure 1.0MPa 1.6Mpa 150LB
Test Pressure Shell Test 1.5MPa 1.5MPa 1.5MPa
High Pressure Sealing 1.1MPa 1.1MPa 1.1MPa
Low Pressure Sealing 0.6MPa 0.6MPa 0.6MPa
Temperature Range PFA:-29℃~200℃    PTFE:-29℃~180℃  FEP:-29℃~150℃
Applicable Medium Strong corrosive medium i.e.hydrochloric acid,Nitric acid,Hydrofluoric acid,Liquid chlorine,Sulfuric acid and Aqua regia etc.
Note:Test standard refers to general valve standard,high pressure should be customized for processing.

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