Flange Check Valve


Flange Check Valve



In accordance with the structure, ZECO flange check Valve is divided into flange lift type check valve, flange swing check valve and flange dual plate check valve. Flange lift type check valve: Disc is sliding along the center line of body. small volume, light in weight, good process performance. It is one of the directions of development about Check Valves; Flange swing check valve: Disc is swing around the outside pin of the seat; Flange dual plate check valve: Two discs is swinging around the center shaft. Flange lift check valve is only be installed in level by flow. Flange swing check valve according to flow can also be mounted vertically and level, preferably the level of the installation. As a well-known flange check valve manufacturer, ZECO has strict requirements on check valve shell test, seal test and low-pressure gas seal test. 100% of the factory tests pressure according to API 598 standard to ensure that every valve is delivered to the customer site in good condition and safety.


1. The renewable seal welded seat of ZECO flange check valve is standard with stellite 6 while optional screwed in seat;

2. Flexible graphite gasket for Class 150 valves, spiral wound gasket for Class 300 & 600 valves, and ring joint for Class 900 & above valves or as an option for the Class 600 valves on customer request;

3. ZECO flange check valve can be placed at the bottom of the center line of the valve body according to the requirements of the user, to ensure that the valve body is blocked by small impurities, there is a maintenance point to remove these small impurities;

4. ZECO flange check valve is Simple and Compact structure, small volume, low weight. It is easy to realized quickly open/close, reliable sealing, excellent performance.


No Part Material
1 Body ASTM A216 WCB
2 Seat ASTM A105 +13Cr
3 Disc ASTM A216 WCB+ 13Cr
4 Arm ASTM A216 WCB
5 Nut ASTM A194 2H
6 Pin ASTM A182 F6a
7 Connector ASTM A216 WCB
8 Gasket Graphite + SS304
9 Bonnet ASTM A216 WCB
10 Bolt ASTM A193 B7

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