One: Overview of pneumatic stop valves

       The pneumatic stop valve adopts a double acting cylinder, and uses the upper cavity inlet or the lower chamber air inlet to remotely control the valve. The operation is convenient and flexible. Cylinder medium: compressed air, nitrogen. The utility model has the advantages of simple structure, convenient manufacture and maintenance, small work stroke, short opening and closing time, close sealing of the body (valve) and the sealing surface of the valve seat, and the sealing force is small, and the utility model has the advantages of erosion resistance and reliable sealing. The valve seat can be replaced by a replaceable valve seat, which can be assembled in combination with the sealing surface material of the closing parts to meet the working conditions and prolong the service life.
 

Two: Pneumatic stop valve structure features
 1, exquisite selection of materials, in line with relevant standards at home and abroad, reasonable structure, beautiful appearance.
 2, the valve flap and the valve seat sealing surface by the iron-based alloy surfacing or Stellite (Stellite) surfacing cobalt based alloy, wear resistance, high temperature resistance, corrosion resistance, good anti abrasion performance, long service life.
 3, the valve stem has been quenched and tempered and treated by surface nitriding. It has good corrosion resistance and scratch resistance.
 4, can use a variety of piping flange standards and flange sealing surface type, to meet the needs of various engineering and user requirements.
 5, the valve material variety is complete, packing and gaskets can be selected according to actual conditions or user requirements, suitable for a variety of pressure, temperature and medium conditions.  
 6, the inverted sealing screw connection, sealing seat or body austenitic stainless steel surfacing, sealing is reliable, change the filling can be in the case of no downtime, convenient and fast, does not affect the system operation.
 

Three: the implementation of standards

Four: main parts and materials

Main dimensions and connecting dimensions of pneumatic stop valves

       Pneumatic globe valve actuator is important in industrial automation control system, remote centralized control can meet the needs of computer program; now widely used in petroleum, chemical industry, gas equipment, nuclear power equipment, water treatment, air conditioning, iron and steel metallurgy, industrial furnace, canned equipment, brewing equipment, drying equipment, vacuum equipment, surface treatment, bio pharmaceutical, food machinery, textile, papermaking and other industries.

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