Set up in 1995, Tonglu Valves Manufactring Co.,Ltd. is one of the leading China check valve manufacturer and supplier in Yongjia County of Zhejiang Province. We manufacture all products strictly conforming to the API, JIS, ANSI, BS, GB, NF and DIN standards. Our oem check valves are available to users on request and are used for municipal works, petroleum, chemical industry, power station, metallurgy, national defense, and scientific research fields.

Check valve lift type DIN3202-F1
Components:
1 Body Cast iron/ductile iron
2 Bonnet stainless steel
3 Disc Cast iron/ductile iron
4 BONNET Cast iron/ductile iron
Application:
Face to face is according to DIN3202-F1
Flange drilled is according to DIN2532/2533
Test:
Working pressure PN10 PN16
Shell pressure 15 bars 24 bars
Seat pressure 11 bars 17.6 bars
Check valve swing type DIN3202-F6
Components:
1 Body Cast iron or ductile iron
2 Seat Brass
3 Disc Seat Ring Rubber
4 Disc Cast iron or ductile iron
5 Stem Carbon steel or stainless steel
6 Cover Cast iron or ductile iron
Application:
1 Face to face DIN3202-F6 PN10/16
2 Flange end DIN2532/2533
3 Nominal Pressure PN10/16
Test:
Working Pressure PN10/PN16
Test Pressure
Shell 15 bars/24 bars
Seat 11 bars/17.6 bars

1) Construction features: bolted cover, swing type disc, threaded or welded seat ring
2) Standard compliance:
a) Basic design: BS 1868
b) Face to face dimension: ANSI B16.10
c) End to end dimension: ANSI B16.10
d) Flanged ends:
i) 2 - 58" to ANSI B16.5
ii) 24" to MSS SP-44
iii) API 605 on request
iv) B.W. ends to ANSI B16.25
e) Shell wall thickness:
i) 2 - 58" to API 600
ii) > 24" to manufacturer's standard
3) Manufactured to NACE MR 01-75 on request
The valve is mainly used in air-conditioners, usually matched with capillary tube. For refrigeration, the refrigeration mixture flows through main capillary tube, entering the check valve, and then flows into the evaporator. For heating, it reverses its flow direction. The refrigeration flows through subsidiary capillary tube which is parallel-connected due to the automatic closure of check valve. We mainly manufacture two series of check valve with nylon and steel valve cores, involving varieties of products: &Phi8, &Phi9.52, &Phi12.7, &Phi16, etc. All these check valves have a lower leakage, longer life-span than the same field, and the size of connectors could be decided by our customers

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