Butterfly valve Principle
Valve opening and closing is a disc-shaped pieces of the disc, the valve body around its own axis of rotation, or adjustments to achieve the opening and closing the valve called the Butterfly valve. Valve fully open to fully closed is usually less than 90 degrees, Butterfly valve and Butterfly valve stroke does not have a strong self-locking, in order to position the disc to install the valve stem on the worm gear reducer. With worm reducer, not only can make the disc with self-locking capability, so that the disc stops at any position, but also to improve the operational performance of the valve. Industry-specific characteristics of Butterfly valve valves to high temperature, for higher pressure range, the valve nominal diameter of large, carbon steel valve body, valve plate rubber seal with metal ring instead of ring. Large-scale manufacture of high temperature valve welded with steel plate, the main medium for high-temperature air duct smoke and gas pipelines.
Butterfly valve benefits
Butterfly valve valves open and close easily and quickly, saving, small fluid resistance, can often operate, simple structure, small size, light weight, can carry mud accumulation of fluid in the pipe outlet at least, low pressure, can achieve a good seal, adjusting performance,
Valve defects
Butterfly valve valve with pressure and operating temperature range is small, poor sealing, the installation, the valve flap to stop in the closed position, open position to disc rotation should be determined with a bypass valve Butterfly valve valve, Open the bypass valve opening should be preceded.
Electric Butterfly valve valve uses the integrated structure, with features, small volume, light and pleasant, reliable performance, supporting a simple element, flow capacity, on the temperature, clean the media, the choice of disc plus soft seal, rubber ring, PTFE ring to reduce leakage, high temperature and pressure conditions can choose three eccentric seal body.
Pneumatic Butterfly valve valve with a new series of GT-type pneumatic actuator, double-acting and single acting spring return, gear transmission, safe, reliable, large-diameter valves with pneumatic actuator Series AW-type fork-type drive, reasonable structure, the output torque Great moment, there are double acting and single acting, dual piston gear, the output torque, small size.
Signal Butterfly valve valve for the fire signal system, control valves, normally open the occasion required, when the valve is open or closed to the specified position, the valve on the signal device can send a signal sent to the fire testing center can demonstrate valve open or closed to prevent the closure of the valve error sprinkler function.
tags: Air gas Range Valves, Natural Gas Top Burner Valve, Gas Top Burner Valve
Flexible Butterfly valve valve Butterfly valve valve with automatic compensation reduction to facilitate loading and unloading pipe thermal expansion and contraction function, use the following at the temperature at 425 ℃, nominal pressure 1.6MPa below in the petroleum, chemical, power, paper making, water supply and drainage, and municipal construction and other industries pipe flow and for regulating the body contains the best drying equipment.
Ventilation Butterfly valve valve used in metallurgy, chemical industry, building materials, power plants, glass and other industries such as ventilation, dust environmental projects in cold or hot gas pipeline, as the gas medium regulate the flow or cut off the device.
Lined Butterfly valve valves for different types of industrial liquid and gas pipeline (including vapor) transport, in particular, the use of corrosive media with a serious situation, such as: sulfuric acid, hydrofluoric acid, phosphoric acid, chlorine, alkali, Wang water and other corrosive media with strong
Soft seal Butterfly valve valve for temperature ≤ 120 ℃, nominal pressure ≤ 1.6MPa of food, medicine, chemical, oil, electricity, textile, paper and other water supply and drainage, gas pipes for regulating traffic and closure of the role of media.
The use of sophisticated hard seal Butterfly valve valve seals and three J-shaped flexible metal seal eccentric multi-level structure, is widely used in medium temperature ≤ 425 ℃ for metallurgy, electric power, petrochemical, and municipal construction, drainage and industrial pipelines for drying the body regulate flow and carrier use.
PTFE sealing Butterfly valve valve installed in the petroleum, chemical, food, medicine, textile, paper, utilities, shipping, water supply and drainage, smelting and other systems, in all corrosive, non-corrosive gases, liquids, semi-fluid and solid powder pipelines and containers used for regulation and closure can be installed anywhere.

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