ZFVALVES participated in the 10th Shanghai International Pump and Valve Exhibition in 2021.
The manufacturer tells you how to deal with valve failure 1. Leakage of valve packing. Cause Analysis: 1. The packing gland is not tightly pressed. 2. The filler becomes invalid due to long-term use or improper storage.
According to the differences in the main application sites, effects and actual meanings of grooved gate valves, the application fields of pressure regulators in China are divided into three situations: market sales, mid-market sales and mid- and low-end market sales.
There are two types of electric valves. One is a quarter-turn electric valve: a quarter-turn electric actuator is used in conjunction with a quarter-turn valve to achieve internal rotation of the valve within 90 degrees to control the flow of fluid in the pipeline; the other is a straight-stroke electric valve: The straight-stroke electric actuator is used in conjunction with the straight-stroke valve to realize the up and down movement of the valve plate to control the flow of the pipeline. It is usually used in conjunction with equipment with a higher degree of automation.
According to the selection of control functions, various valves have their own functions, so pay attention to their corresponding functions when selecting.
Corrosion has always been one of the most serious hazards of chemical equipment. A slight carelessness can damage the equipment, or cause an accident or even a disaster. In the selection of chemical valves, the first thing to pay attention to is the scientific nature of material selection. There is usually a misunderstanding that stainless steel is a "universal material". It is very dangerous to hold stainless steel valves regardless of the medium and environmental conditions.
The globe valve is one of the more widely used valves. The reason why it is popular is that the friction between the sealing surfaces during the opening and closing process is small, it is relatively durable, the opening height is not large, the manufacturing is easy, and the maintenance is convenient. Low pressure, but also suitable for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the disc and the sealing surface of the valve seat closely fit to prevent the medium from flowing.
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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