Black water gray water coal slurry ball valve

Specifications

Technical specifications

Structural classification

✔ It can be divided into two-piece and three-piece metal sealing ball valves, through the spray welding of cemented carbide technology on the sealing surface of the ball seat, the thickness of the alloy is ≥0.8mm, and the hardness value is ≥ more than 52HRC, so that the sealing pair of the valve can withstand the corrosion, scouring and wear of particles, sediment, slag, cinder, corrosive gas, etc. in the medium, ensuring the sealing performance and service life of the product. After the sphere is sprayed and polished by a special grinding machine, its roundness can reach 0.005~0.008mm, the surface roughness can reach 0.1μm, and the sealing pair has a high degree of anastomosis, so that the sealing performance of the valve is superior, especially for high pressure and severe working conditions of particle scouring in the medium.

Two-piece floating structure

Two-piece floating structure

1. Left valve body 2. Seat seal ring 3. Outlet seat 4. Sphere 5. Imported valve seat 6. Press Circle 7. Disc spring 8. Sealing gasket 9. Nuts/Studs 10. Right valve body 11. Valve stem 12. Folio Ring 13. Thrust pad 14. Packing pads 15. Packing 16. Packing Press Sleeve 17. Packing platen 18. Screws 19. Limit plate 20. Elastic retaining ring 21. Handle 22. Gasket 23. Hex bolts

 

Three-piece fixed structure

1. Valve body 2. Hex nuts 3. Legs 4. Stud 5. Dust ring 6. Cylindrical springs 7. Seat seal ring 8. Dust ring 9. Valve seat 10. Spheres 11. Winding pad 12. Lower Shaft Sleeve 13. Winding pads 14. Screws 15. Bottom shaft 16. Valve body 17. Hanging ears 18. Cylindrical Pin 19. Stuffing Box 20. Screws 21. Packing platen 22. Studs/Nuts 23. Brackets 24. Worm gearbox 25. Packing Pressing Sleeve 26. Filler 27. Packing pads 28. Upper shaft sleeve 29. Winding pad 30. Stem 31. Spherical shaft sleeve 32. Dust ring

Product features:

★ Excellent design concept

The valve adopts a two-body floating ball or a three-body fixed ball design, and the sphere and valve stem adopt a split design. The valve body material can be cast or forging according to user requirements. The material of the ball shaft is selected from different austenitic stainless steel, and the valve stem is made of 17-4PH, which not only ensures the material requirements of the ball hardening treatment, but also ensures the strength of the valve stem.

The unique patented design of the integrated fully isolated valve seat (patent number ZL202022217094.1) of Grand Valve can effectively prevent solid particles from entering the spring void. The spring is made of InconelX-750 nickel alloy material, which is resistant to high temperature, corrosion and oxidation.

★ Medium flange quantitative compression design

★ Self-cleaning double scraper structure design

The inner and outer sides of the sealing surface of the valve seat are designed with a scraper structure, which can automatically clean the impurities and dirt bonded on the surface of the sphere when the valve switches and closes.

★ Natural anti-static structure design

The metal parts such as the valve body, valve seat, and sphere of the metal hard seal ball valve are in close contact, naturally forming an electrostatic channel connected to each other. Therefore, metal hard-sealed ball valves do not require special anti-static installations.

★ Complete fireproof structure design

The sealing surface of the metal hard seal ball valve adopts a metal-to-metal sealing structure, the packing material is made of flexible graphite, and the gasket is wound with stainless steel + flexible graphite, so the valve ensures a reliable seal even in the event of a fire.

★ Reliable stem design

Valve stem explosion-proof spray safety design Targeted valve stem anti-wear design More than 2 times safety factor design 90° quick switch

Quantitative Preloading Dynamic Active Load Seal Patent (Patent No. ZL 2021 2 1859290.7) Design: The disc spring pack with quantitative compression in a closed space provides a continuous sealing preload for the packing material, which can automatically compensate for packing leakage caused by changes in packing due to valve operation, temperature and pressure cycling, and time-related changes in packing volume.

★ Double blocking and discharge function structure design

Double blocking function: The metal hard seal fixed ball valve generally adopts the ball front seat sealing structure, and its two valve seats can independently cut off the medium at the inlet and outlet ends to achieve double blocking function.

Discharge function: When the sphere is in the closed position, even if both ends of the valve inlet and outlet are pressurized at the same time, the middle cavity and the channels at both ends of the valve are blocked from each other, and the residual medium clamped between the sealing surfaces of the two valve seats can be discharged through the discharge channel.

★ Automatic pressure relief design in the middle chamber

When the medium pressure in the middle chamber of the valve is abnormally pressurized, the design of the retraction valve seat can ensure that the pressure in the middle chamber pushes the valve seat and automatically relieves the pressure, ensuring the safety of the valve.

★ The floating ball is equipped with a one-way sealing structure design as standard, and the fixed ball is equipped with a two-way sealing structure design as standard

★ Prevent misoperation of the structural design

★ The fixed ball is equipped with double bearing positioning and protection structure design as standard

★ The runner is designed to be washed out and hardened

The hardening treatment design of the runner is solved by the following two measures to prevent corrosion, wear and erosion of the medium:

1. Add a wear-resistant coating to the parts of the sphere and valve seat that are easily washed away.

2. Add wear-resistant coating to the channel part of the ball valve, including body, cover and ball channel.

★ Purge device can be added to the valve cavity and valve shaft (optional)

★ design of actuators and accessories

According to the working conditions of the medium, select high-performance valve actuators to meet the requirements of working conditions, and select original imported solenoid valves, position switch transmitters, air filtration pressure reducing valves and other accessories.

Dimensional data

Black water gray water coal slurry ball valve

Special metal hard seal ball valve for black water ash water coal slurry is specially designed for the complex working conditions of coal gasification, and is a special hard seal ball valve that can adapt to high temperature, high pressure and high wear resistance working conditions. Mainly to solve the problem that the valves cannot be opened and closed normally due to medium scaling and wear of the valves used in the coal slurry feeding and black water process pipelines in the gasification plant, the key valves of the gasification device suitable for coal slurry, black water and gray water and other media are developed to improve the service life of the valves and ensure the long-term operation of the whole set of gasification devices. Black water is actually water containing most of the gasified residual carbon directly discharged from the bottom of the gasifier and scrubber; Gray water is actually the water containing most of the gasified residual carbon directly discharged from the bottom of the gasifier and scrubber after flash evaporation treatment to clarify and remove slag.

Black water and gray water are characterized by complex composition, a large number of solid particles, easy scaling, high concentration of chloride ions, H2S and other acidic substances, high temperature and pressure. The black water gray water coal slurry ball valve is used for frequent opening and closing (once every half hour), fast opening and closing speed (generally 3 seconds to 10 seconds), high temperature, high pressure (generally using Class 600 to Class 900 pressure level), gray water, black water, mortar and coal slurry and other media working conditions containing a large number of solid hard particles. The product has good sealing performance, reliable sealing and long service life.