Description

Detailed information:

Large diameter electric double eccentric gas butterfly valve SP**7H*2.5

Nominal diameter: DN**0~***0

Nominal pressure: 0.*5~0.*5MPa

Suitable temperature: less than or equal to **0 DEG C and less than or equal to **0 DEG C

Drive mode: manual, electric, pneumatic, hydraulic

Applicable medium: dust laden gas, air, etc.

Butterfly valve is a disc type open and close parts of the fluid switch *0 degrees, usually in the liquid, gas, and other fluid pipeline system as a block open, flow control valve and damper function. Large diameter butterfly valve is a valve with a diameter greater than **0cm.

The original butterfly valve is a simple, and the closure of the valve is not strict, simple fluid control switch

With the progress of science and technology civilization now butterfly not only has the advantages of simple structure, small volume, light weight, material consumption province, installation of small size, and the driving torque is small, simple, rapid and also has good traffic withered Festival function and closure sealing characteristics, in the past ten years, the fastest growing variety of valves.

Especially in the United States, Japan, Germany, France, Italy and other developed industrial countries, the valve is widely used. The variety and quantity of its use still continues to expand and to acid and alkali resistant, high temperature, high pressure, large diameter, high sealing, long life, excellent regulation characteristics and a valve and more power to development direction, its reliability and other performance indicators reached higher level, and has been partially replaced by cut-off valves, gate valves and ball valves.

With the progress of butterfly valve technology. In a short period of time can be expected, especially in large and medium diameter, low pressure areas of use, the valve will become the dominant form of the valve.

Large diameter butterfly valve butterfly plate installed in the direction of the diameter of the pipe. In the butterfly valve body cylindrical channel, the disc shaped disc around the axis of rotation, rotation angle of 0 degrees **0 degrees, between the rotation to *0 degrees, the valve is fully open state.

Large diameter butterfly valve, the clip type butterfly valve structure is simple, small size, light weight, only by a few parts. And only need to rotate *0 degrees to quickly open and close, easy to operate, and the valve has a good flow control characteristics. Butterfly valve in the fully open position, the butterfly plate thickness is the medium flow through the body when the only resistance, so the pressure generated by the valve is very small, so it has a good flow control characteristics.

Butterfly valve with elastic seal and metal seal two kinds of sealed type. Elastic sealing valve, sealing ring can be embedded in the body or attached to the periphery of the butterfly plate.

Using metal sealing valve generally more than flexible sealing valve life is long, but it is difficult to do completely sealed. The metal seal can adapt to the higher working temperature, and the elastic seal has the limitation of temperature.

If you require the use of flow control valve as the main choice is the right size and type of valve. Butterfly valve structure is particularly suitable for the production of large diameter valves. Butterfly valve is widely used in oil, gas, chemical industry, water treatment and other general industry, but also applied to the cooling water system of thermal power station.

Butterfly valves commonly used in the butterfly valve and flange type butterfly valve two. The clip type butterfly valve is a double headed bolt connecting the valve between the two pipe flange, flange type butterfly valve is a valve with a flange, with bolts on both ends of the valve flange connection on the pipe flange.

performance comparison

Nominal pressure and nominal diameter of the same common butterfly valve and gate valve which is relatively good, not easy to leak?

The sealing property of the valve is better than that of the butterfly valve, but also has a good performance of the butterfly valve closed.

Gate valve has large volume and large occupied space. Can withstand greater pressure.

Butterfly small size, small occupied space. Can withstand the pressure is relatively small.

Specific choice of time, but also consider the temperature of the media