Petrochemical special valve: In petrochemical special valves, the single-acting spool valve and double-acting spool valve in the catalytic cracking device are typical. The single-acting spool...
Petrochemical refers to the production of gasoline, kerosene, diesel, lubricating oil and liquefied petroleum gas and other petroleum products using petroleum and natural gas as raw materials; the...
(1) The valves used in the water supply pipeline are generally selected according to the following principles: 1. When the pipe diameter is not more than 50mm, a globe valve should be used. When...
Principles for determining pipeline design pressure ① The design pressure of the pipeline must not be lower than the maximum working pressure. ② The design pressure of the pipeline equipped with...
Safety valve calibration On-line calibration and checker calibration are the two most commonly used calibration methods. According to the equipment conditions of the coal chemical plant, the type...
Coal is chemically processed into gas, liquid and solid fuels and other chemical products. During the production process, the pressure of the medium in the equipment or pipeline rises due to...
The 14th Wenzhou Pump and Valve Exhibition 2019 will be held in Yongjia, North China on October 25th. PVPEW, the 14th Wenzhou (Jinying) Pump and Valve Exhibition 2019 Exhibition period: October 25...
Installation requirements for cryogenic valves Because of the special structure of the cryogenic valve, the installation of the cryogenic valve also has its special requirements. Because of the...
The electric valve actuator is an indispensable device for realizing valve program control, automatic control and remote control. The movement process can be controlled by the stroke, torque or...
1. Working principle of plug valves Plug valves are one of the most widely used valves for both on/off and throttling services. Their design is fairly simple. Plug valve is comprised of three main...
In pipeline engineering, the correct selection of electrically operated valves is one of the guarantee conditions to meet the requirements of use. If the electric valve used is not properly...
Selection of safety valve type: 1. Determining valve type Conditions of Use Recommended Type of Safety Valve Flammable Gas, Toxic Gas, Refrigerant, Polluting Gas Closed Safety Valve Water...
The angle control valve is similar to the single seated valve on structure except that the valve body is angled. Its characteristics determine its simple flow path and low resistance, especially...
The safety valve is a valve type pressure relief device, which is mainly consistent of three parts: valve seat, disc and loading mechanism. The safety valve is an automatic valve that uses the...
The fundamental causes of the pipeline vibration of the unit system are the design, installation, operation and running of the unit. The pipeline vibration of the system directly reflects the...
1) Elimination of resonance noise Only when the regulating valve resonates, is there energy superposition that produces a strong noise of more than 100 decibels. Some produce strong vibration with...
In the rotating equipment and flowing medium, low-intensity mechanical vibration is unavoidable. The mechanical vibration of the rotating equipment is transmitted to the pipeline system through the...
When it comes to the seat and sealing of a trunnion mounted ball valve, we often classify them into DBB and DIB type. People usually get really confused about how to differentiate a DBB ball valve...
When the steam is transferred from the boiler to the steam point of equipment under high pressure condition, the pressure reduction control is usually carried out. Why does steam need to be...
The valve controls and conveys the medium by the cooperation between the valve body and the valve disc. After the valve is closed, the pressure at the inlet end and the outlet end is different, and...