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Valves are any of various devices that regulate the flow of gases, liquids, or loose materials through piping or through apertures by opening, closing, or obstructing ports or passageways. Valves are used in a variety of applications including industrial, military, commercial, residential, transportation.An air operated valve is a type of power operated valve that uses air pressure against a piston or diaphragm to produce linear or circular movement to operate a valve. An air-operated valve comprises a piston, a cylinder in which the piston is allowed to slide by operation air and a valve section to be driven by sliding movement of the piston. The cylinder includes an outer member having a hollow portion and an inner member loaded in the hollow portion of the outer member to define a piston chamber in which the piston is allowed to slide. In the conventional air-operated valve, the cylinder is constituted of the base and the cap both made of rigid metal and engaged with each other. These base and cap have to be machined to form large hollow portions for the first and second piston chambers. If the sliding surfaces along which the first and second pistons slide are rough, the o-rings attached to the first and second pistons may be damaged, leading to leakage of the operation air from the pressure chambers into the backpressure chambers. To avoid such damages, the base and the cap have to be machined to form the respective sliding surfaces with improved surface roughness. The conventional air-operated valve requires many cutting works to the base and the cap made of metal ensuring pressure resistance, which would cause wasteful consumption of metal materials and high costs. He present air operated valve provides an air- operated valve comprising a piston, a cylinder in which the piston is allowed to slide by operation air, and a valve section to be driven by sliding movement of the piston, wherein the cylinder includes: an outer member having a hollow portion; and an inner member loaded in the hollow portion of the outer member, defining a piston chamber in which the piston is allowed to slide. The air-operated valve has the function of a cylinder including the function of causing a piston to slide and the structural function of ensuring pressure resistance to operation air. Specifically, the air- operated valve comprises the inner member that serves as a member having the former function and the outer member that serves as a member having the latter function. Thus, the inner member formed with the piston chambers correspondingly has a more complicated construction than the outer member. According to the air-operated valve, therefore, the outer member and the inner member are made of different materials according to respective intended use, thereby achieving a reduction in cost.
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Featured Suppliers of Air Operated Valve
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Ankit Sales & Services |
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Manufacturers & exporters of valves |
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Valves |
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R.k. Control Instruments Pvt. Ltd. |
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Mfrs. Of control valves with pneumatic actuators, positioner,booster, airlock, filter pressure regulator, for critical and non-critical processes, in various industries like chemical, petrochemical, fertiliser, refinery, power, steel, oil |
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Valves |
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Sant Industrial Controls Pvt. Ltd. |
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Manufacturers of : ball valves balancing valves butterfly valves check valves gate valves globe valves (g.M. & c.I.) 2 & 3 way solenoid valves 3 way mixing / diverting valves float & flow switches pot & `y type pan humidifiers boilers |
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Bajaj Engineering Works |
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Engineers & government suppliers of gun metal, cast iron, bronze valves & cocks and boiler mountings estd. 1967 pst/cst no. 27969412 dt. 3.6.67 |
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Valves |
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