果冻久久尤物

Stainless Steel Wafer Type Butterfly Valve D373W

The butterfly plate of the butterfly valve is mounted in the diametrical direction of the pipe. In the butterfly valve body cylindrical channel, disc-shaped butterfly plate around the axis of rotation, the rotation angle of 0 ° -90 ° between, can play the role of flow regulation, when the butterfly plate to 90 °, the valve reaches the maximum Opening. Wafer-type butterfly valve structure is simple, small size, light weight, only by a few parts. And only need to rotate 90 ° to quickly open and close, simple operation, while the valve has good fluid control characteristics.

The butterfly plate of the butterfly valve is mounted in the diametrical direction of the pipe. In the butterfly valve body cylindrical channel, disc-shaped butterfly plate around the axis of rotation, the rotation angle of 0 ° -90 ° between, can play the role of flow regulation, when the butterfly plate to 90 °, the valve reaches the maximum Opening.

Wafer-type butterfly valve structure is simple, small size, light weight, only by a few parts. And only need to rotate 90 ° to quickly open and close, simple operation, while the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the disc thickness is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. Butterfly valve has a flexible soft seal and metal seal two seal types. Elastic soft sealing valve, the ring can be embedded in the valve body or attached to the disc around.

Valves with metal seals generally have a longer life than elastically sealed valves, but they are difficult to completely seal. Metal seals can be adapted to higher operating temperatures, while flexible elastomeric seals are subject to temperature limitations.

If a butterfly valve is required for flow control, it is important to select the correct valve size and type. Butterfly valve structure is particularly suitable for the production of large diameter valves. Butterfly valve not only in the oil, gas, chemicals, water treatment and other general industry is widely used, but also used in thermal power plant cooling water system. This type of valve in the pipeline should generally be installed horizontally.

Commonly used butterfly valve on the clip-on butterfly valve and flange butterfly valve two. Wafer-type butterfly valve is a double-headed bolt to connect the valve between the two pipe flanges, flange-type valve with a flange on the valve, the valve flange on both ends of the flange connected to the pipe.

structure type

(2) Single eccentric sealing butterfly valve (3) Double eccentric sealing butterfly valve (4) Three eccentric sealing butterfly valve

Sealing surface material

(1) soft seal butterfly valve. 1) The sealing pair is made of non-metallic soft material for non-metallic soft material. 2) The sealing pair is composed of metal hard material for non-metal soft material. (2) hard metal seal butterfly valve. The sealing pair is made of a metal hard material to a metal hard material.

Seal form

(1) forced seal butterfly valve 1) elastic seal butterfly valve. Seal pressure is generated by the elasticity of the valve plate when the valve is closed by squeezing the seat, seat or valve plate. 2) plus torque sealed butterfly valve. The seal specific pressure is generated by the torque externally applied to the valve shaft. (2) pressure sealing butterfly valve. Sealing pressure by the valve seat or valve plate on the bomb seal element produced by the pressure. (3) automatic sealing butterfly valve. The sealing specific pressure is automatically generated by the medium pressure.

Working pressure

(1) vacuum butterfly valve. Working pressure is lower than the standard reactor atmospheric history butterfly valve. (2) low-pressure butterfly valve. Butterfly valves with PN <1.6mpa nominal pressure. Pn = ""> 100MPa butterfly valve.

Operating temperature

(1) high temperature butterfly valve. T> 450 ° C butterfly valve (2) temperature butterfly valve. 120 & lt; t & lt; 450 & lt; 0 & gt; C. (3) room temperature butterfly valve. A butterfly valve of 40 ° C <t <; 120 ° C. (4) low temperature butterfly valve. A butterfly valve of 100 <t <- 40 ° C. (5) ultra-low temperature butterfly valve. T <a 100 ° C butterfly valve.