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TieLing ZG Valve Technology Co.,Ltd
Add:Fuzhou Road,Economic Development Zone,Tieling,Liaoning,China
Tel:+86-24-72690555
Fax:+86-24-72690111
Ph:+8615941025678
E-mail:tlvalve@aliyun.com
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Butterfly Valve Regularly Check The Use Of Results
- Jun 01, 2017 -

Butterfly valve installation matters

1, butterfly valve installed before the need to confirm product performance and media flow arrows are consistent with the movement conditions, and the valve chamber scrub clean, not allowed in the seals and butterfly plate with impurity foreign body, not allowed to be closed before cleaning Butterfly plate, so as not to damage the seal.

2, discs supporting the installation of flanges recommended disc valve dedicated flange, that is, HGJ54-91 type welded steel flange.

3, installed in the pipeline position, the best position for the standing equipment, but can not flip.

4, the need to adjust the flow of use, there are worm gear box to control.

5, open, closed more times the disc valve, in about two months time, open the worm gear cover, check the butter is normal, should keep the amount of butter.

6, check the connection parts required to tighten, that is to ensure that the packing of the seal, but also to ensure flexibility and flexible stem.

7, metal seal butterfly valve products are not suitable for installation at the end of the pipeline, such as must be installed at the end of the pipeline, need to take the export flange, to prevent the seal squeeze, over the bit.

8, regularly check the valve use effect, found that the failure to rule out.

Functional use:

  Butterfly valve (butterfly valve) refers to the closure (disc or butterfly plate) for the disc, around the valve shaft rotation to achieve the opening and closing of a valve in the pipeline from the main cut and throttling effect. Butterfly valve opening and closing parts is a disc-shaped butterfly plate, in the valve body around its own axis of rotation, so as to achieve the purpose of opening or closing or adjustment. Butterfly valve fully open to the whole is usually less than 90 °, butterfly valve and butterfly rod itself does not have self-locking ability, in order to butterfly plate positioning, to install the worm on the stem reducer. The use of worm reducer, not only can make the disc with self-locking ability, so that the butterfly plate to stop at any position, but also improve the valve operating performance. The characteristics of industrial butterfly valve can be high temperature, suitable pressure range is also high, the valve nominal diameter, the valve body made of carbon steel, valve plate sealing ring with metal ring instead of rubber ring. Large-scale high-temperature butterfly valve made of steel welding, mainly used for high-temperature media, smoke duct and gas pipeline.

Selection rule:

  Stem diameter: on the multi-turn class stem valve. It can not be assembled into electric valves. Therefore, if the electric butterfly valve device allows passage of the largest stem diameter can not pass through the valve stem of the valve. The inner diameter of the hollow shaft of the electric device must be greater than the stem diameter of the stem valve. For the local rotary valve and multi-turn valve in the dark bar valve, although not consider the stem diameter through the problem, but should also take into account the choice of stem diameter and keyway size, so that after assembly to work properly.

Operating Torque: The operating torque is the most important parameter for selecting the valve motor. The electric butterfly valve movement process can be controlled by the stroke, the torque or the axial thrust. As the operating characteristics and utilization of the valve electric device depends on the type of valve, the device work standard and the position of the valve on the pipeline or equipment, the valve electric butterfly valve device is the indispensable equipment to realize the valve program control, automatic control and remote control. Therefore, the correct choice of valve electric device, to prevent the occurrence of overload (working torque is higher than the control torque) is essential. Usually, the correct choice of valve electric butterfly valve device basis.

The output torque of the electric device shall be 1.2-1.5 times the maximum torque of the valve operation.