Butterfly valve, also name as flap valve, is a simple regulating valve, which can be used for butterfly valve controlled by switches in low pressure pipeline, and the closing part (disc or butterfly plate) of butterfly valve revolves around the valve shaft to achieve opening and closing.
Production Size:DN40-DN300mm
Pressure range:PN10,PN16
Design Standard:
Face to Face:DIN3202/EN558-1
Flange Standard:EN 1092/DIN2533
Testing Standard:EN12266
Main Material of parts:
Body:GG20/GG25/GGG45/GGG50
Disc:GG20/GG25/GGG45/GGG50/Carbon steel/stainless steel
Stem:2Cr13/SS304/SS316
Seat:PTFE/RPTFE/TFM1600
It can be used to control all kinds of fluids such as air, water, steam, corrosive media, mud, oil, liquid metal and radioactive medium. The main function is cutting off and throttling in the pipeline.
Butterfly Valve Wafer Type Butterfly Valve,Lug Type Butterfly Valve,Thread End Butterfly Valve,High Performance Butterfly Valve CANGZHOU HENGJIA PIPELINE CO.,LTD , http://www.czhjpipe.com
Worldwide, terrorists use hidden explosives for cheats, hijackings, horrific and tragic events such as machine crashes and train explosions. In order to eliminate the occurrence of these tragic events and ensure the safety of people's lives and property, airports, docks, railway stations and other places must be able to effectively detect hidden explosives in luggage and parcels. Therefore, the detection of hidden explosives is a concern of the world.
At present, many countries in the world are studying explosive detection instruments of various methods. Conventional X-ray imaging technology mostly detects the density of luggage and parcels. It is up to the operator to judge based on experience and cannot tell with certainty whether the baggage and the package contain explosives.
The China Institute of Atomic Energy, in cooperation with the Beijing Municipal Public Security Bureau, uses the Nuclear Quadrupole Resonance (NQR) technology to develop an explosives detection device that performs an inspection of explosives based on the NQR characteristics of each human being. The explosives detection device not only detects explosives, but also detects radioactive materials at the same time. The device is a channel structure with only a few buttons. At present, only a few countries in the world can produce practical detection devices.
China has developed a new explosive detector
A channel-type explosive detector for the inspection of luggage and suitcases successfully developed by the China Institute of Atomic Energy has recently passed the acceptance and review of relevant experts.