The sealing principle of the wedge gate valve is based on the tight combination of the two sealing surfaces on the wedge gate and the two sealing surfaces on the valve body to achieve the seal. The purpose of using the wedge gate is to increase the auxiliary sealing load, so that the metal hard-seal wedge gate valve can seal both high medium pressure and low medium pressure. When closing, rotate the valve stem clockwise to make the sealing surface of the gate valve and the sealing surface of the valve body close to achieve a seal.
Author: Fucheng County PENGDA machinery Source: valve manufacturers Published: 2020-11-18 09:21 Views: 98
ZFV ( Zhejiang zhengfeng valve co., ltd ) is a professional triple eccentric butterfly valve manufacturer, producing high qulity butterfly valve with various manufacturing standard include API, DIN, JIS. GOST, EN, ISO, GB and so on , with different materials. We welcome customer over the world to contact us for consultion.
Valve size DN80, pressure rate PN16, flanged end, raised face, the pipe flange as per GOST 33259-2015 for E, floating ball construct. The ball valve is used for shutoff purpose on-off type, main part material is austenic stainless steel: body ASTM A351 CF8, ball ASTM A182 F304, stem ASTM A182 F304, seats material PTFE. It’s full bore type valve. With firesafe design. the valve leakage class is as per GOST 9544 - A, valve operated by single action pneumatic actuator.
Refer to below detail description of concentric butterfly valve :DN200 rate PN16 wafer type, clamped between flanges, the flange standard GOST 33259, the valve is operated by electric actuator, material body material carbon steel WCB, disc stainless steel CF8, shaft stainless steel. The actuator is 380V / 50Hz / 3ph, no explosionproof, open / close type, with integrated limit switches, integrated torque switches, with manual override, IP67, for -40degree C, with cable gland .
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