1. Multipass drain valve must be installed vertically in a horizontal line. 2. The pipeline after clean, to install the valve. 1. Anticlockwise turn the handwheel stem drive the valve core is gradually move up, release on sealing surface, the diversion on the valve core seat gradually out of the seat inner hole, form a narrow gap, medium by symmetric orifice into the seat on the seat, a small amount of medium can flow through narrow slit, gradually reduce the system pressure. 2. Continue to turn the handwheel counterclockwise, valve core upward movement, diversion on orifice removed the seat inside the cavity, more through the medium of seat and valve throttling after successful eduction. 3. Continue to turn the handwheel counterclockwise, Industrial Valves core is up to the full open position, at this point, the medium pressure greatly reduced, a large number of impurities can be directly to discharge from the valve orifice set, and the inverted the sealing seat of the vortex formation, keep clean the sealing surface, prevent adhesion of impurities on the seal. (2) the valve closed process: 4. Clockwise (valves, valve rod drives the valve core is moving, the sewage is over, the system pressure is low, the orifice area on the valve sleeve gradually decreases, and guide sleeve close to the seat, and the flow direction of medium change, medium after throttling at a certain speed through the valve core and valve sealing surface, gradually strengthen the strength of the sealing surface clean. 5. Continue to turn the handwheel, the guide seat into the seat on the valve core hole, form the narrow gap throttling, because near the end of that medium has fewer impurities, the guide sleeve and the narrow gap between the seat prevents the remaining small impurities into the sealing face, medium through the slit fast flow, thorough cleaning the sealing surface, guarantee seal contact with zero leakage. 6. Continue to turn the handwheel, Industrial Valves core and the seal seat contact. Seal. Drain valve standards, the size of the drain valve, drain valve, drain valve principle; Drain valve body and bonnet with clip type connection, drain valve structure is compact, drain valve disassembly convenient, drain valve is easy to install, drain valve manifold for welding connection. Drain valve self-tightening seal structure is adopted, and the drain valve sealing ring made of the forming of asbestos packing, the higher the drain valve of medium pressure, sealing the better. Down by the branch into the sewage drain valve medium. Drain valve disc to the piston structure and boriding processing. Drain valve corrosion resistance to erosion long service life.
Maintaining os&y gate valve is not as easy as it may seem. You have to do plenty of important tasks. So cruel is the truth unless you've got a to help you.
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