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Adjust the valve than infinite
1958 RHWEIKER designed the first rubber plug-type control valve to meet the gas industry for low-noise multi-purpose needs, this rubber plug-type control valve universally affirmed. Later, many improvements have been made and become today's WELKER JET control valve. Features: Absolutely off, large and soft sealing surface, even in the case of welding slag, larger particles, but also close tightly. The minimum flow is absolutely zero. The main part of the valve can be directly connected as a direct role, can also be coupled with the pilot valve into an indirect role, but also through pneumatic control. The main valve structure: It and rubber pinch valve the opposite principle, there is a streamlined hollow rubber plug located in the middle of the channel, the rubber plug has a hollow hydraulic medium, when the hydraulic medium pressure increases, rubber expansion, the channel ring Smaller area, play a role in interception, the media pressure continues to rise, the rubber stopper can completely close the channel. The large diaphragm and stem compose the gas-liquid pressurization device, which provides pressure for the deformation of the rubber plug. The power of the large diaphragm comes from the feedback of the regulating valve outlet, connected by the signal pipe. I do not know if you did not understand it