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Manual Parallel Gate Valve

Manual parallel gate valve

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Manual parallel gate valve Double gate valve

Manual parallel gate valve product features
1. The valve seat adopts an O-ring seal and a floating valve seat structure that applies preload force, so that the inlet and outlet of the flat gate valve are sealed in both directions; and the opening and closing torque of this structure is only 1/2 of that of ordinary valves, making it easy to open and close. Close valve
2. When fully open, the channel is smooth and straight, with extremely small flow resistance coefficient and no pressure loss. The pipeline can be cleaned by passing hair balls. 3. It adopts a packing structure with self-sealing ability, which does not require frequent adjustment. It is extremely light to open and close, and The sealing performance is reliable. The stuffing box is equipped with an auxiliary sealing grease injection structure. The sealing performance is absolutely reliable and truly achieves zero leakage. It solves the problem of leakage at the packing part of general valves. 4. The flat gate valve can automatically remove the high pressure in the inner cavity when it is closed. , ensure safe use
5. Fully enclosed structure, good protective performance, adaptable to all-weather requirements
6. The sealing structure of the valve seat should be elastic and pre-tightened, with the upstream and downstream sealing seats sealed at the same time. There is always a face-to-face seal between the valve seat and the seal. 7. The valve seat has a self-cleaning function and is not directly washed by air flow during the opening or closing process of the valve. The valve seat should be made of lubricated, non-abrasive material.
8. Failure of the valve actuator will not affect other parts of the valve, and repair and replacement work can be performed without dismantling the valve.
9. Yoke bushing – The aluminum bronze yoke bushing is equipped with a needle thrust bearing to minimize operating torque. 10. Valve stem – thread length to bracket; pins and spot welds; for stability.
11. Pressure seal – Simple structure, equipped with segmented retaining rings and silver-plated mild steel gaskets to facilitate disassembly and achieve the best bonnet seal.
12. Seat ring – The welded seat ring is perpendicular to the flow channel and is easy to maintain.
13. Actuator – These valves can be equipped with electric, hydraulic or pneumatic actuators. Below DN300, it is equipped with a standard manual handwheel, and above DN350, it is equipped with a helical gear operating mechanism.
14. Yoke – The fully assembled yoke has passed seismic tests and is easy to maintain and install the actuator.
15. Gland – two-piece, self-adjusting gland to avoid being ejected.
16. Integral rear seat – hard surface, longest service life.
17. Disc – The spring-loaded disc is self-adjusting, reducing torque requirements on the actuator.
18. Integral stop – The integral cast bracket stop device positions the assembled bracket valve disc, making the valve seat more stable and reliable.
19. The valve body has two structures: casting and welding.
20. The valve seat adopts an O-ring seal and a floating valve seat structure that applies preload force to make the valve inlet and outlet sealed in both directions; and the opening and closing torque of this structure is only 1/2 of that of ordinary valves, making it easy to open and close. valve. 21. Metal-to-metal sealing valves have a grease injection structure on the outside of the valve body. The grease enters the valve sealing surface through the grease injector and the valve seat, making the valve achieve zero leakage.
22. The valve seat is inlaid with PTFE on the sealing surface, which has double sealing of PTFE to metal and metal to metal. The PTFE sealing surface can also remove dirt from the gate plate.
23. The gate plate and valve seat are treated with special technology, spray-welded with carbide and wear-resistant PTFE to achieve double sealing. It can also be filled with grease to assist sealing for double protection, making the sealing more reliable and the service life longer.