What are the structural characteristics of pneumatic ball valves?
Pneumatic ball valves are evolved from plug valves. It has the same 90 degree rotation, except that the plug body is a sphere with a circular through hole or passage through its axis. The ratio of the spherical surface to the passage opening should be such that when the ball is rotated 90 degrees, the spherical surface should be entirely present at the inlet and outlet to intercept the flow. This type of valve can be installed in any position in the pipeline. 150Mm Graphite Electrodes,Rp 150 Graphite Electrode,Graphite Electrode Rp Grade,Graphite Electrode For Smelting Carbographite Industrial PTE.LTD , https://www.graphites.pl
The structural characteristics of the pneumatic ball valve are:
Pneumatic Actuator: It adopts a new series of GT-type pneumatic actuators, with double-acting and single-acting (spring return), rack and pinion transmission, safe and reliable; large-diameter electric valve adopts series HAW pneumatic actuator forklift drive. Reasonable structure, large output torque, double acting and single acting (spring return); refer to our pneumatic actuator sample.
Shell structure: The valve body of the fixed ball valve can be designed into three forms: casting structure, forged structure and all-welded structure according to different needs of users and actual working conditions. The ball valve of all welded structure is mainly suitable for buried use.
Unique seat sealing structure: The floating ball valve adopts the lip-type elastic sealing ring structure to ensure the reliability of the seal. For low pressure, ultra low pressure or vacuum; the ball valve used for the condition, the valve seat sealing structure loaded by the leaf spring can ensure The ball valve has a long-term reliable seal. The seat material of medium and high temperature ball valves can be selected from para-polyphenyl or metal materials. The fixed ball valve selects the ball front sealing structure, the ball rear sealing structure or the front and rear double sealing structure according to the pressure, the medium property and the sealing requirements. The seat material of medium and high temperature ball valves can be selected from para-polyphenyl or metal materials.
Blocking and draining: When the valve is closed, the valve seat on the upstream and downstream sides blocks the liquid, and the accumulation of the cavity in the valve body can be drained through the drain.
Automatic pressure relief structure: When the pressure in the middle chamber rises abnormally, the medium cavity medium can push the valve seat by its own thrust and automatically release pressure, thus ensuring the safety of the valve.
Reliable sealing of the valve stem: the valve stem adopts a bottom-loading structure with inverted sealing. The sealing force of the inverted seal increases with the increase of the medium pressure, so that the valve stem can be reliably sealed, and when the valve stem is abnormally boosted, The valve stem will not be ejected.
Fireproof structure: The ball valve can be designed as a fireproof structure according to the working conditions and the needs of the user. The Refractory design of the ball valve is regulated by the standards of API607 and JB/T6899. When a fire occurs and the soft seal is burnt, the fireproof structure of the ball valve can prevent a large amount of leakage of the medium and prevent further expansion of the fire.
Anti-static structure: When the valve is operated, due to the friction between the ball and the valve seat, the electrostatic charge of the cattle will be generated and accumulate on the sphere. In order to prevent the generation of static sparks, an electrostatic device is placed on the valve to accumulate on the sphere. Charge derivation.
Full-bore structure and reduced-diameter structure: In order to meet the different needs of users, the company's ball valve products have two series of full diameter and reduced diameter. The inner diameter of the full-bore ball valve is the same as the inner diameter of the pipe, which is easy to clean. The weight of the reduced-diameter ball valve is relatively light, but the flow resistance is only about 1/7 of the same diameter stop valve. Therefore, the application of the reduced diameter series ball valve is broad. .
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