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 .
Size PN200, pressure rate PN10, wafer type, clamping between flanges according to EN1092-1, the valve is three eccentric type. The butterfly valve is used for high temperature with radiator design. The material body material stainless steel A351 CF8, disc material stainless steel A351 CF8, stem SS, disc sealing ring SS304+graphite laminated.
The safety valve is a safety protection valve. Its opening and closing parts are normally closed under the action of external force. When the pressure of the medium in the equipment or pipeline rises and exceeds the specified value, it will automatically open. It is prevented by discharging the medium to the outside of the system. The pressure of the medium in the pipeline or equipment exceeds the specified value.
As per below detail description for the soft seat butterfly valve :DN250 rate PN16 type wafer end, clamped between flanges, the flange standard GOST 33259, the valve is motorize electric actuator operated, material body material ductile iron, disc material stainless steel CF8, shaft material stainless steel. The actuator is 380V / 50Hz / 3ph, no explosion-proof option, open / close type, with integrated limit switches, integrated torque switches, with manual override, IP67, for -40degree C, with cable gland .
Size 6inch, pressure rate class 150, LUG type tapped holes, clamping between flanges according to ANSI B16.5 class 150, valve construct is triple offset type, the butterfly valve is with stainless steel steel: The material body material stainless steel A351 CF8M, disc material stainless steel A351 CF8M, stem material 17-4PH, disc sealing ring SS316+graphite laminated.
Ball valve floating ball type, 2 piece construct, full bore, DN50, PN16, flanged end, flange with raised face, valve material stainless steel: body and bonnet AISI321, ball and stem AISI321, seat PTFE, the ball valve is manual operated with handle lever. AISI321 is better than normal stainless steel such as AISI304, AISI321 include special chemical element “Ti” which is better for corrosive medium .
Ball valve, type trunnion mounted ball with upper stem supported, class rate 300Lb, lockable gearbox with handwheel operation, split body ( two piece ) construct, which is generally used for middle and low pressure condition construct. the valve is full bore type, which provide excellent flow rate. Flanged end raised face, flange finishing with serrated face. fire-safe design, with anti-static device spring supported stainless steel small ball, also is blow-out proof stem design. The ball valve is double block and bleed function design. and stem & seat grease injection fitting. With bleed plug and vent plug. Main part material body and bonnet ASTM A216 WCB, ball ASTM A182 F316, seat ASTM A182 F316, prime sealing NYLON, stem SS A276 316, seat spring Inconel X-750, packing graphite, bolt and nut ASTM A193 B7 & A194 2H.
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