Combination ball valves can be customized
Ball valve seat structure classification
by：AIRWOLF
2021-01-15
Ball valve seat can be divided into ordinary seat, resilient seated, elastic ball sealing structure and rotating seat.
1. Ordinary seats. Ordinary seat ball valve features are: under the effect of pre-tightening force or fluid pressure, the valve seat and the ball pressure, and make the seat material and elastic-plastic deformation to seal. The sealing effect depends on the seat in the fluid pressure or pre-tightening force, under the action of compensation sphere can not roundness and the degree of surface micro roughness.
2. Resilient seated. Resilient seated in addition to ordinary seat, the pre-tightening force or fluid pressure ( Or both) , the seat material produce elastic deformation on the seal, the two also due to the special structure of the seat itself or with the aid of with the elastic element, such as metal elastic skeleton, the way such as spring, prestressing force in produce elastic deformation or fluid pressure, to compensate for temperature, pressure, abrasion and other external conditions change will effect the performance of the valve seal.
3. Elastic ball sealing structure. Its structure characteristic is: there is a narrow sphere below the groove, make rigid sphere is easy to deformation of the elastic ball, the ball above the processing a tapered flat incision, with a tapered flat head of the bottom of the stem. This kind of sealing structure overcomes the metal to metal seal the disadvantages of large torque of operation, and simple structure, easy fabrication, applicable to occasions of high temperature and high pressure.
4. Rotate the seat. The main characteristics of the valve is in the process of opening and closing, the valve seat can make rotation movement along the tunnel axis. Its structure and function principle is: the inlay seat of floating bearing with 24 tooth scattered around on the sphere has two engages with the teeth on the rotary seat body of the jaw, in the process of operation, each time ball valve closed, the ball on the dial the claw will toggle rotation of the body on a tooth, the entire seat with 15 ° rotation Angle. So, rotating seat, even wear along the circumference of a circle, so as to improve the working conditions of valve seat, prolong the service life of it.
this paper by: original pneumatic ball valve, reprint please indicate the article source: http://www. thank you
1. Ordinary seats. Ordinary seat ball valve features are: under the effect of pre-tightening force or fluid pressure, the valve seat and the ball pressure, and make the seat material and elastic-plastic deformation to seal. The sealing effect depends on the seat in the fluid pressure or pre-tightening force, under the action of compensation sphere can not roundness and the degree of surface micro roughness.
2. Resilient seated. Resilient seated in addition to ordinary seat, the pre-tightening force or fluid pressure ( Or both) , the seat material produce elastic deformation on the seal, the two also due to the special structure of the seat itself or with the aid of with the elastic element, such as metal elastic skeleton, the way such as spring, prestressing force in produce elastic deformation or fluid pressure, to compensate for temperature, pressure, abrasion and other external conditions change will effect the performance of the valve seal.
3. Elastic ball sealing structure. Its structure characteristic is: there is a narrow sphere below the groove, make rigid sphere is easy to deformation of the elastic ball, the ball above the processing a tapered flat incision, with a tapered flat head of the bottom of the stem. This kind of sealing structure overcomes the metal to metal seal the disadvantages of large torque of operation, and simple structure, easy fabrication, applicable to occasions of high temperature and high pressure.
4. Rotate the seat. The main characteristics of the valve is in the process of opening and closing, the valve seat can make rotation movement along the tunnel axis. Its structure and function principle is: the inlay seat of floating bearing with 24 tooth scattered around on the sphere has two engages with the teeth on the rotary seat body of the jaw, in the process of operation, each time ball valve closed, the ball on the dial the claw will toggle rotation of the body on a tooth, the entire seat with 15 ° rotation Angle. So, rotating seat, even wear along the circumference of a circle, so as to improve the working conditions of valve seat, prolong the service life of it.
this paper by: original pneumatic ball valve, reprint please indicate the article source: http://www. thank you
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