Cock pneumatic valve advantages and disadvantages of inventory

cock pneumatic valve is a one-piece top pneumatic valve body design, with a top mounted ball type pneumatic valve has some comparability, and compared two chip or chip pneumatic ball valve is a completely different type and different applications of the products. Underneath, small make up to tally up cock the advantages and disadvantages of pneumatic valve. To cock the applicability of the pneumatic valve main application has the following advantages:
, pneumatic valve body for one-piece, roof mounted design, simple structure, easy maintenance, online without pneumatic valve leakage points, piping support higher intensity.
in the media has a strong corrosive, chemical process, in the chemical field, often see pneumatic valve body is corrosion medium, so the application in the chemical process of pneumatic valve, pneumatic valve body must have strong permeability and resistance to intergranular corrosion resistance, the cock of the pneumatic valve pneumatic valve for high grade casting, casting quality for class II, precision grade V.
, inside a minimalist, opening and closing the cock is completely covered by bushing, pneumatic valve body and cock no wear, simple and economic bushing and the replacement of the top seal can complete the maintenance and update of pneumatic valves, long-term use can achieve ℃, and belong to the application range of metal hard seal ball pneumatic valve compared with considerable competitive advantage.
pneumatic valve and plug the processing surface only top surface and flange, other parts all one-time casting molding, pneumatic valve internal processing, compared with the pneumatic ball valve has the advantages of lower machining allowance when material for INCONEL, MONEL, hartz alloy, such as material, have clear price advantage.
and plug pneumatic valve according to the user's demand a variety of design and achieve a specific function. Cock pneumatic valve of pneumatic valve is customized products, special custom cock pneumatic valve is easy to implement customer process, can make it three, four, five, six, double pneumatic valve group or pneumatic valve, all kinds of jacket requirements, etc. , such as the six flux distribution of pneumatic valve used in polyester industry is based on the patent business requirements of cocks pneumatic valve, pneumatic valve when using pneumatic ball valve do custom is difficult.
and sealing, no clearance at present is still cock the particular characteristics of pneumatic valves, although the presence of clearance pneumatic ball valve design, but just as much as possible to the pneumatic ball valve with pneumatic valve clearance to ~ mm pneumatic ball valve design, can't achieve cladding has the advantages of application of sexual face seal is cock the characteristics of pneumatic valve, pneumatic valve is suitable for processing the cock many harsh medium, such as easy to crystallization, viscosity, containing catalyst particles and deposit corrosion fluid.
, coated bushing provides face seal characteristics, can strictly control in accordance with API soft seal pneumatic seat zero leakage test requirements, can achieve TA - Luft or ISO pneumatic valve stem seal requirement.
cock pneumatic valve integrated is characteristic of its service life is long, high reliability, for a lot of corrosion resistance, abrasion resistance, toxic, continuous operation device such as a medium and is a good choice, in the field of chemical industry has the application advantages and extensive applicability.
cock pneumatic valve faults are as follows:
and face seal of driving torque requirements of improved design, equipped with pneumatic actuators in the necessary cases, compared with the pneumatic ball valve requirements with more actuators and accessories would increase the cost of users. Such as PP workers arts, the Lord cut off pneumatic valve, pneumatic valve USES is cock instead of pneumatic ball valve, but the high frequency switching pneumatic valve adopts pneumatic ball valve, pneumatic cock so basically pneumatic valve is applied to cut off the key position. Cock pneumatic valve is not recommended applied in control field, high frequency switch is not plug the advantage of pneumatic valve, it is of high reliability to cut off the pneumatic valve.
, in some applications, the liner material is not the right choice or pneumatic valve body according to the design of the liner deformation release area is undeserved, can cause a swelling phenomenon, PTFE liner materials lead to the change of the pneumatic valve drive torque required for several times, in the case of materials correctly and targeted to consider basic to avoid the happening of this kind of situation.
and plug the pneumatic ball valve pneumatic valve of one-time investment, but as the cock of the pneumatic valve reliability and life cycle cost advantage is gradually accepted by domestic users, more and more users will be extended to the original design requirements of cock pneumatic valve, and gradually reduce to pneumatic ball valve.