Huang Zhen, Anhui Science and Technology Co., Ltd. supply valve butterfly valve

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Huang Zhen, Anhui Science and Technology Co., Ltd. supply valve butterfly valve

Information Name:	Huang Zhen, Anhui Science and Technology Co., Ltd. supply valve butterfly valve
Published:	2015-07-09
Validity:	365
Specifications:	Various specifications
Quantity:	10000.00
Price Description:
Detailed Product Description：	Butterfly known as flap valve, a control valve simple structure can be used to switch control valve low pressure pipeline medium refers to closed parts (disc or disc) to the disc around the valve axis to achieve the opening and closing a valve, the valve can be used to control the flow of air, water, steam, corrosive media, mud, oil, liquid metals and radioactive fluids and other types of media. Cut off from the main pipe and the throttle effect. Valve opening and closing member is a disc-shaped butterfly plate in the valve body around its own axis, so as to achieve the purpose of opening and closing or adjusting. Butterfly (English: butterfly valve) is closed parts (valve or disc) to the disc around the valve axis to achieve the opening and closing a valve in the main pipeline from the cutting and the throttling effect. Valve opening and closing member is a disc-shaped butterfly plate in the valve body around its own axis, so as to achieve the purpose of opening and closing or adjusting. Valve fully open to fully closed is usually less than 90 °, butterfly and butterfly stroke itself is not self-locking capability, in order to position the disc to install the worm gear on the stem. Using worm reducer, not only can make the disc with self-locking capability, so the disc stop in any position, but also to improve the valve performance. Industry-specific characteristics of butterfly valves to high temperature, higher pressure range, the valve nominal diameter large, carbon steel valve body, the valve plate seal with a metal ring in place of the rubber ring. Large temperature valve with welded steel manufacturing, mainly for smoke duct and gas pipelines high temperature media. Electrically adjustable butterfly valves and electric belong to electric control valve in a species. Connections are: flange and wafer type. Industrial automation and control important execution units. Electric control valve installation points two analysis: installation position, altitude, direction of imports and exports must meet the design requirements, pay attention to the direction of flow of the medium should be consistent with the direction of the arrow on the valve body, the connection should be firmly tight. Electric control valve must be visually inspected prior to installation, the valve plate should be consistent with existing national standards, "Universal Valve logo" GB12220's. For working pressure greater than 1.0MPa and the role played off valve in the main pipe, before mounting strength and rigorous performance tests should be carried out. Passing behind the prospective use. Strength test, the test pressure is 1.5 times the nominal duration of not less than 5min, the valve housing, packing should be no leakage in compliance. Electric control valve structure can be divided into the bias plate, vertical plate, swash plate and leveraged. Press the seal can be divided into soft and hard seal sealing type two. Soft sealing type commonly used rubber ring seal, hard seal type commonly used metal ring seal. By driving score (1) electric butterfly valve (2) pneumatic valve (3) hydraulic valve (4) manual butterfly structure divided by: (1) the center of the sealing valve (2) a single eccentric seal butterfly valve (3) double eccentric sealing butterfly valve (4) Three eccentric butterfly valve seal sealing surface Material: (1) soft sealing butterfly valve. 1) Sealing of non-metallic soft materials soft non-metallic materials. 2) Sealing material made of non-metallic rigid metal soft material. (2) metal seal butterfly valve. Sealing a metallic hard material metal hard material. Press the seal in the form points: (1) forces sealed off valve. 1) elastic sealing butterfly valve. Sealing pressure when the valve is closed by the valve plate squeeze the elastic valve seat or valve plate production. 2) applied torque sealing butterfly valve. Sealing pressure generated by the applied torque to the valve shaft. (2) pressurized sealing butterfly valve. Sealing pressure seal made of an elastic member seat or valve plate filling pressure generating element. (3) self-sealing valve. Sealing pressure generated automatically by the media pressure. By work pressure points: (1) vacuum valve. Working pressure is lower than standard atmospheric pressure valve stack. (2) low-pressure valve. Nominal PN100MPa butterfly. According to the working temperature points: (1) high temperature. t> 450 ° C butterfly. (2) temperature butterfly. 120 C

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