Automatic reflow pneumatic valve structure characteristics and working principle

automatic reflow pneumatic valve structure characteristics and working principle of the
automatic reflow pneumatic valve installed on the boiler feed water pump export, to prevent the reverse feed water, and to ensure that the minimum flow recirculation bypass has certain.
the feed water pump tee pneumatic valve by pneumatic valve body and valve cover through the flange connection, so that the installation, maintenance, maintenance and pneumatic valve seat grinding, changed the original rib structure. Pneumatic seat and disc are surfacing welding carbide, ensure the erosion resistance, abrasion resistance and sealing, prolong the service life. Pneumatic valve internal seal for rubber sealing ring seal to ensure the reliability of the seal. Pneumatic valve import and export and export recirculation system are connected by flange, convenient for dismantling and maintenance. This pneumatic valve integrated the parts, can complete the four different

automatic reflow pneumatic valve function:
automatic reflow pneumatic valve is installed in the pump export, but it can automatically detect the size of the pump flow, and through the guide control pneumatic valve pneumatic valve recycled actions ( Replaced the previous recycle action is controlled by pressure indirectly.
pneumatic valve body with recirculation relief facilities, can make the pressure medium flow around after a lot of small size and spend a lot of energy to reduce pressure recirculation system.
the pneumatic valve only at very low flow have a recirculation cooling pump, when the normal operation of pump, not recycle, thereby saving the past by continuous recycle consumption of electricity and water.
this automatic recycling control pneumatic valve does not need electrical wiring, also do not need two regulating pneumatic valve series, One for adjustment, one for the cut off, and the high-speed flow can bring a high pressure system is easy to stay and to minimize erosion phenomenon. Automatic reflow working principle of the pneumatic valve is given priority to reduce pneumatic valve flow, main pneumatic disc under the action of spring force to the pneumatic seat direction, when the flow reaches the minimum flow of the pump, pneumatic disc link drive the pneumatic valve guide, reduce pressure on the piston, the piston moves near the open vent valve, ( Through the vent valve of the fluid in the ventilation move under the regulation of the disc, make medium step-down, so that the pump at low load operation there is a small amount of recycled, guarantee the cooling pump. When flow more than the minimum flow of the pump, the main pneumatic disc rise, to close the pneumatic valve guide, to cut off the bypass. Fundamentally solve the previous system operation is not smooth, the noise big, short life, shortcomings and so on is expensive, and inconvenient installation and maintenance.