Pneumatic piston to cut off the pneumatic valve industry valve _ pneumatic components factory

Pneumatic pneumatic valve pneumatic piston to cut off the pneumatic valve definition: pneumatic piston to cut off the pneumatic valve in application and common in polysilicon industry, and other instruments and accessories, which can realize the process of production process such as pressure, level, temperature, flow parameters and medium such as gas, liquid, steam and solid particles of the remote control. Pneumatic piston to cut off the pneumatic valve in polysilicon industry mainly includes the pneumatic valve, metal hard seal cutting soft seal cut off the pneumatic valve, etc. According to perform structure is divided into the cylinder piston, gear and rack type and fork type 3 kinds. The correct selection and installation of pneumatic piston to cut off the pneumatic valve is particularly important, it relates to the cut-off valve operating performance, personal and production safety, the problem such as the cost of production. Pneumatic piston to cut off the pneumatic valve must be in strict accordance with the process and control system requirements for selection, installation and maintenance. Pneumatic piston to cut off the pneumatic valve overview: pneumatic piston to cut off the pneumatic valves are widely used in polysilicon industry, suitable for medium, gas, liquid and steam is mainly used to truncate or on line in the medium, can also be used to adjust and control of the fluid. Pneumatic piston to cut off the main consideration in the selection of pneumatic valve to meet process control requirements under the premise of chosen cut-off valve structure simple, reliable, strong commonality and easy maintenance. From a reliability perspective, the structure is simple, its reliability, the more, the choice of material is also very critical. The role of the pneumatic piston to cut off the pneumatic valve: pneumatic piston to cut off the pneumatic valve is mainly used to cut and through media, can also be used for fluid regulation and control, V pneumatic can accurate flow control, pneumatic and tee is used to assign the medium and change the flow of medium. Usually a pneumatic piston to cut off the pneumatic valve is made up of three parts, pneumatic actuator, body, attachments, Contains will choose attachment solenoid valve) , triple pieces; Optional accessories have handwheel, limit switch, the rest of the working condition of the accessories have a requirement according to the requirements of customers to choose (even Whether you need such as voltage requirements, field explosion-proof, explosion-proof grade, etc. ) 。 Pneumatic piston to cut off the pneumatic valve body composition: 1, the body is composed of five large: stem and packing, valve core and valve seat and shells. 2, the valve stem material generally are mostly 2 cr13 material, also can be optional according to user requirements. 3, packing material has four fluorine ring (V 180℃） And graphite ( 220℃） 。 4, seat: the seat of PTFE sealing materials have soft seal ( 180℃） PPL ( 180℃~220℃） And hard seal ( Alloy steel and carbide) 。 5, valve core material: 304, 316, 316, l6, valve body material: WCB, 304, 316, 316 l pneumatic piston to cut off the working principle of the pneumatic valve, pneumatic piston to cut off the only need to use pneumatic valve pneumatic actuator drives the body to rotate 90 °, can realize the medium flow truncation and the opening of the function. And only need a small rotational torque can be closed tightly. Full equality of the valve body cavity provides medium with a resistance is very small, and straightway port. Pneumatic piston to cut off the pneumatic valve features: 1, the fluid resistance small, pneumatic valve is all valve class a zui fluid resistance small, even reducing pneumatic valve, the fluid resistance is small. 2, thrust bearing, reduce the stem friction torque, can make the valve stem long smooth and flexible operation. 3, the valve stem seal is reliable, because stem rotational motion and not only do the lifting movement, the valve stem packing seal is not easy to damage, and sealing ability increases as the medium pressure increases. 4, seat sealing performance is good, use the sealing ring made of elastic material, such as teflon structure is easy to be sealed, and pneumatic valve valve sealing ability increases as the medium pressure increases. 5, such as ptfe material has good self-lubrication, with aerodynamic body wear loss is small, so the long service life of pneumatic valve. 6, bottoms type valve stem and valve stem head convex order to prevent the valve stem, stem seal damage caused by such as fire, convex order between the body and also can form metal contact, to ensure that the valve stem seal. 7, anti-static function: set between aerodynamic body, valve stem and valve body spring, will be generated switching process of electrostatic export. Pneumatic piston to cut off the pneumatic valve installation requirements: 1, the inspection before installation of pneumatic piston before cut off the pneumatic valve, check the pneumatic cut off the appearance of the pneumatic valve, accessories, spare parts, factory test records, prior to installation debugging to calibration when necessary. 2, the principle of installing pneumatic piston to cut off the pneumatic valve installation position and the ground to want to have a certain height, valve up to leave a certain space, disassembling and repairing for valve. For equipped with limit switches, solenoid valve and pneumatic piston to cut off the pneumatic valve handwheel, must ensure that the operation, observation and easy to adjust. Pneumatic piston to cut off the pneumatic valve can be installed in vertical or horizontal pipe runs with the valve and pipe up and down vertically, before and after the valve pipe installed on the fixed bracket. Horizontal pneumatic piston cut pneumatic valve under the valve to support, to ensure stable and reliable. For vertical installations pneumatic cut pneumatic valve and shut-off valve should be support ( Except for small diameter cut-off valve) 。 Especially large-diameter fork type cut-off valve, because the cylinder is larger, more attention should be paid to the pneumatic cutting fixed pneumatic valve cylinder for support. Pneumatic cut pneumatic valve installation to ensure that the pipeline and pneumatic cut concentric pneumatic valve, keep parallel connecting flange. Pneumatic piston to cut off the pneumatic valve sealing ring rubber parts such as low temperature aging become fragile, high temperature aging, when installation should pay attention to the installation location, away from the steam and low temperature liquid pipeline. : pneumatic cut-off pneumatic valve Q947F Q641F/H/H electric cut off the pneumatic valve pneumatic cutting characteristics of pneumatic valve type O cut off the working principle of the pneumatic valve