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Yuhuan Zhanfan Machinery Co., Ltd.  is a professional manufacturer for the Stainless Steel Water Meter parts&valves and high-tech enterprise integrated of research&design, Non-standard customized ,production, sales and service . It established in 2002, . located in the ‘CITY OF VALVE’– Yuhuan Industrial Area,Taizhou,Zhejiang province,with convenient transportation to Ningbo and shanghai Port and all the mainland place.

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  • Selection principle and selection of check valve

    Most check valve sizing is based on a qualitative evaluation of the minimum shock pressure or no shock closure and the required closing speed and its closing speed characteristics. 1. ZF8006 Stainless Steel female thread swing check valve DN20 for incompressible liquids Check valves for incompres...

  • Incorrect operation of gate valve

    When testing new piping systems, the pipes and valves are subjected to preliminary tests: two leak tests, one 150% hydrostatic test and one N2He (nitrogen, helium) leak test. These tests cover not only the flanges connecting the valve and piping, but also the bonnet and valve body interfaces, as ...

  • Preparations before ball valve repair

    After the ZF8004 Stainless Steel Hydraulic ball valve with lever DN15~DN50 female thread Customer designed OEM is in use, it usually needs to be disassembled and repaired. The following Yuhuan valve manufacturer will explain the preparations before the ball valve repair. When the ball valve is cl...