According to the different parameters, several different pressure reducing cagesare designed to form a multi-stage pressure reducing internals. The cages are designed according to different working conditions to ensure the elimination of flash and cavitation of the valve. The medium begins to throttle from contacting the frst cage and gradually reduces the differential pressure of the inlet through multiple throttling. This effectively ensures that the pressure is always above the saturated vapor pressure when the medium flows in the valve, so that it eliminates the possibility of fash and cavitation, and prolongs the service life of the control valve in bad working conditions.

Design Features

1.Continuous regulation in the range of high pressure difference.
2.Adopt multi-stage gradual decompression, anti-cavitation, and low noise.
3.The valve plug is sealed by a conical surface with a good sealing effect.
4.Multiple design of valve plug, providing good regulation performance.
5.Hard alloy spray welding for valve plug and valve seat ensures erosion resistance and long service life.
6.The valve core is equipped with a guiding structure, balanced adjustment, and no vibration.
7.Actuator can be subject to interchangeable installation.

Structure and Materials

Part Material

Note: 1.The above is of standard configuration structure; the valve seat is metal seal, and the valve seat is soft seal, grade VI optional. It can provide valve trim of spray welding cemented carbide. 2.The conventional material is carbon steel and stainless steel, and the special material regulating valve products can be customized according to the user’s work conditions.

Structure of High-Pressure Control Valve

Multi-stage axial-flow structure

It is subject to multi-stage cage type valve plug or axial-flow labyrinth type valve plug, to reduce pressure by multi-stage, fully control the flow velocity of medium flowing through the valve, and greatly reduce the noise generated by high-pressure gas or steam in the valve. In addition, the stable multi-stage pressure reduction can effectively prevent the liquid from cavitation. It is a control valve with stable performance in high-pressure medium place, and multi-spring pneumatic diaphragm actuator or electric actuator, etc., are available.

Cage type high-pressure angle structure

The valve body is rectangular, with simple flow passage and small resistance. It is especially suitable for the adjustment of high viscosity, suspension, and granular medium fluid, avoiding coking, sticking, and blocking. The valve plug is plunger type, which is used under the condition of high pressure difference. The valve plug is surfacing with tungsten cobalt alloy, which has the advantages of cavitation resistance, impact resistance, greatly improving the service life. It is widely used in the chemical industry, petroleum refining, and other industries, especially in the medium regulation under high-pressure and high-pressure difference conditions in the synthesis of nitrogen and urea industry.

Two-stage cage sleeve structure

The valve is mainly suitable for occasions with large pressure difference and easy to produce flash and cavitation. According to different parameters, several different pressure-reducing cages are designed to form multi-stage pressure-reducing internals. The cages are designed according to different working conditions to ensure the elimination of flash and cavitation of the valve. The medium begins to throttle from contacting the first cage and gradually reduces the differential pressure of the inlet through multiple throttling. This effectively ensures that the pressure is always above the saturated vapor pressure when the medium flows in the valve, which eliminates the possibility of flash and cavitation, and prolongs the service life of the control valve in bad working conditions.