The valve sleeve type blowdown stop valve is evolved from the gate, and uses the gear rotation 90 degrees to drive the valve stem to ascend, realizes the opening and the closing goal.
The valve sleeve type drain valve has the advantages of simple structure, good sealing performance, small volume, light weight, and less consumption of materials, installation of small size, especially the drive, regular sewage drain valve PN 20MPa high pressure boiler, can five channels at the same time can also be a channel of sewage, sewage.
Order note:
If there is no selected model, please provide detailed parameters, such as medium, temperature, pressure, caliber, material and so on. Our technicians will select for you
Two. Provided that the selected model is available according to the selected model
Three, non standard products need to provide samples or confirmed by drawings
Note: the information is for reference only, or incomplete, so please feel sorry for the inconvenience. The company can choose according to different requirements and parameters. The company has a variety of sizes, pressure, different materials, connections, drive mode, to meet the different needs of various types of gate valve. Please contact 021-6651 8677 or consult online.
1, this valve is a new type of throttle, cut-off, vent products, the valve adopts the cage - shaped fan legion throttle, with multi-stage throttle effect, throttle effect is obvious, reliable sealing, easy to operate and maintain the characteristics.
2, the valve USES double seal (hard, soft seal) to make the seal reliable, hard alloy cover can be more resistant to airflow erosion, wear resistance, double seal can achieve in high pressure gas medium conditions of zero leakage. Long service life of valve.
3. The sealing surface of the valve seat adopts taper seal, which is conducive to cleaning the dirt attached to the sealing surface of the valve itself.
4, the valve disc set on the balance hole, piston seal, to ensure the opening/closing full pressure differential condition of stable operation, open light and flexible, small opening and closing torque.
5. The packing adopts v-shaped packing structure with self-sealing ability, which is very light to open and close without adjustment. The stuffing box is provided with auxiliary sealing grease injection structure, so that the valve packing sealing performance is reliable.
6. The valve can be repaired online, and the pipeline can replace a series of vulnerable parts such as packing under pressure.
7, the valve in the bottom of the valve set a large drain hole, when necessary to open, clean the dirt in the valve.
8. There is a high o-ring seal in the outer garden of the valve disc of the sewage valve, which has the function of self-cleaning and sealing when opening/closing, and the function of reducing the pressure when discharging.
Working principle 1, normally closed state: disc hard seal pay on seat convex platform, forming a hard seal, and embedded in the disc with soft seal seat face tight pressure, formation of the second seal, double quality sealing structure ensures zero leakage of the valve, because the disc opened balance hole again, make the valve in the closed and open, the disc by smaller force, also make the valve opened and closed with a smaller torque.
2, throttle blowdown state: the disc seals off the seat, because there is a balance hole in the disc, making the valve open very light. After the valve is opened, the medium and impurities in the pipeline flow through the valve sleeve and valve seat together to realize throttling and sewage discharge. The sealing surface of disc and valve seat can change the flow direction of the medium by the beveled Angle of cushion, which has the function of self-cleaning, so that the seal is free of impurities.
3, closed state: after the discharge of media in the pipeline, close the valve, media from the cushion oblique Angle into the valve seat channel, the flow resistance coefficient increases, speed up the flow rate, oblique Angle changes the direction of media flow, generating vortex, the end face of the valve seat medium radial force increases, realize the valve seat unsealed purge. Disc sealing pay close to the seat, the set of cushion and seat channel fit clearance flow direction of medium to prevent larger particles seal pay, combined with the further increase of flow velocity and transverse force of purging medium, the valve closing seal pay impurity is clean, ensure the sealing performance of valve after discharge, thus further ensure drainage after sealing can achieve without leakage. This greatly improves the capability and prolongs the service life.
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