Control valve leakage test method Type A test method 1.1 The test medium is a cleaning gas (air or nitrogen) or a liquid (water or kerosene) at 5 ° C to 40 ° C. 1.2 The test medium pressure is 0.35 MPa, and the specified allowable pressure difference...

The electric butterfly valve is a valve that uses a circular disc as a starting and closing member and rotates with the valve stem to open, close and adjust the fluid passage. The butterfly valve is not only simple in structure, small in size, light ...

When some media that are easy to precipitate and contain solid particles are adjusted by ordinary valves, they are often blocked at the throttle and guide, and the gas and steam can be flushed at the bottom of the lower bonnet. When the valve is bloc...

The flow-opening type flows toward the opening direction, and the cavitation and erosion mainly act on the sealing surface, so that the sealing surface of the valve core and the valve seat is quickly damaged; the flow-closing type flows toward the cl...

PVC It is polyvinyl chloride plastic with bright color, corrosion resistance, firmness and durability. Due to the addition of some toxic auxiliary materials such as plasticizers and anti-aging agents in the manufacturing process, its products general...

By increasing the diameter of the valve to increase the working opening, the specific methods are as follows: 1. Change the valve of a small first diameter, such as DN32 to DN25; 2. The valve body does not change, replace the valve with small valve s...

Time flies, the years change, the busy 2018 has passed in a blink of an eye, and the expectant 2019 is coming to us. The new year gives birth to new goals and hopes, and Kaixin ushered in the 2018 annual meeting. There is a surprise when entering the...

Thank you letter to customers: Dear Customer 　　 Hello! On the occasion of New Year’s Day, we are grateful to extend our cordial greetings and sincere thanks to you: Thank you for your continued support and help to Kaixin Pipeline Technology ...

1. Large opening work extended life method Let the regulator work as far as possible at the maximum opening, such as 90%. Thus, cavitation, erosion, and the like occur on the head of the spool. As the spool is broken, the flow rate increases, and the...

The action of the regulating valve is unstable. The symptoms and causes are as follows: 1. The air source pressure is unstable. A. The compressor capacity is too small; B. The pressure reducing valve is faulty. 2. The signal pressure is unstable. A. ...

1. Leakage of valve body and bonnet ► Reason: 1. The casting quality of iron castings is not high, and there are defects such as blisters, loose tissues, slag inclusions on the valve body and bonnet body; 2. Day freeze cracking; 3. Poor welding, ther...

When the regulating valve is made of graphite-asbestos, the lubricating oil should be added to the packing for about three months to ensure the flexibility of the regulating valve. If it is found that the packing pressure cap is pressed very low, the...