Knife gate valves

We offer zhongcheng   Gate valves with a long working life as equivalents for replacing knife gate valves for slurry and sludge of world brands operated in China.

Gate valve (valve) zhongcheng  is a patented China design of a knife gate valve for pulp and sludge in the technological areas of concentrating and gold recovery plants. The design replaces and is equivalent, but exceeds in terms of working life and performance characteristics knife gate valves of world brands operated in China

• Isogate (WARMAN, Weir Minerals)

• Metso

• Sistag

• Orbinox

• CMO.

Since 2019, zhongcheng metagates have been used instead of imported gate valves in the most critical sections of slurry and sludge pipelines:

• PJSC MMC Norilsk Nickel

• PJSC "MMK"

• PJSC "POLYUS"

• JSC "POLYMETALL", etc.

Advantages of zhongcheng sliding gate valves (gate valves) for pump  and sludge in comparison with imported equivalents:

1. Longer working life in terms of the number of cycles and operating time until the necessary repair or replacement.

2. Do not use rubber inserts that are subject to wear and require constant monitoring and replacement.

3. Cleaning when lifting the knife from adhering solid particles of the pulp due to cutting with sharp metal edges of the body tightly adjacent to the knife.

4. The design of the knife with a round cut and lifting up when closing ensures guaranteed closing and opening without interference with any amount and size of solid particles in the working environment (solid particles do not interfere with the knife, remain in the pipeline and do not penetrate into the body cavities and on the sealing rings).

5. More than 1.5 times the thickness of the most worn part of the structure - the knife.

6. The knife, unlike the standard valve, is not made of relatively fragile stainless steel, but of a special heavy-duty "armored steel" NM 500.

7. For even greater protection against abrasive, the knife on the side of the pulp flow is coated with a special abrasive-resistant alloy - tungsten carbide.

8. The internal section of the body of the metagate, through which the pulp passes, is covered with cermet to protect it from the impact of the abrasive.

9. O-rings (rubber inserts), unlike a standard gate valve, are not located outside in the working medium flow, but are located inside the body and are closed from direct exposure to solid particles in the slurry.

for mixed (solid-liquid), viscous, slurry, abrasive media with possible formation of crystallizing deposits, max. medium temperature depending on the seal material:

• Manufacturing and supply: according to TU 3700-001-62724990-2010

• Nominal diameters: DN40 ÷ DN2000

• Nominal pressure: 1.0 MPa (10 atm.).

• Connecting flanges of the pipeline steel welded in accordance with GOST 12820-80 or 12821-80 (GOST R 54432-2011). Connecting dimensions and dimensions of sealing surfaces of pipeline flanges according to GOST 12815 (GOST R 54432-2011).

• Operating temperature of slide gate valve: -20 °С ÷ +180 °С

• Application area: pulp, waste water, sludge, slag, etc.

• Tightness according to class A according to GOST 9544-2005 (GOST R 54808-2011) in the direction of the working medium - two-sided. Each KG-QU series gate valve (gate) METAROSSA is tested for leaks.

• Manufacturing and supply: according to TU 3700-001-62724990-2010

• Nominal diameters: DN50 ÷ DN1200

• Nominal pressure: 1.0 MPa (10 atm.)

• Gate valve connection: interflange (coupling). Connecting flanges of the pipeline steel welded in accordance with GOST 12820-80 or 12821-80 (GOST R 54432-2011). Connecting dimensions and dimensions of sealing surfaces of pipeline flanges according to GOST 12815 (GOST R 54432-2011).

• Operating temperature of the slide gate valve: -60 °C ÷ +600 °C, (depending on the material used and the chemical composition of the medium)

• Applications: slurry, waste water, sludge, slag, etc.

• Tightness according to classes A, B, C according to GOST 9544-2005 (GOST R 54808-2011) in the direction of the working medium - one-sided. Each gate valve (gate) METAROSSA of the KG series is tested for leaks.

• Manufacturing and supply: according to TU 3700-001-62724990-2010

• Nominal diameters: DN50 ÷ DN1200

• Nominal pressure: 1.0 MPa (10 atm.)

• Gate valve connection: interflange (coupling). Connecting flanges of the pipeline steel welded in accordance with GOST 12820-80 or 12821-80 (GOST R 54432-2011). Connecting dimensions and dimensions of sealing surfaces of pipeline flanges according to GOST 12815 (GOST R 54432-2011).

• Operating temperature of the slide gate valve: -60 °C ÷ +600 °C, (depending on the material used and the chemical composition of the medium)

• Applications: slurry, waste water, sludge, slag, etc.

• Tightness according to classes A, B, C according to GOST 9544-2005 (GOST R 54808-2011) in the direction of the working medium - one-sided. Each gate valve (gate) METAROSSA of the KG series is tested for leaks.

• Manufacturing and supply: according to TU 3700-001-62724990-2010

• Nominal diameters: DN50 ÷ DN2000

• Nominal pressure: 1.0 MPa (10 atm.)

• Gate valve connection: interflange (coupling). Connecting flanges of the pipeline steel welded in accordance with GOST 12820-80 or 12821-80 (GOST R 54432-2011). Connecting dimensions and dimensions of sealing surfaces of pipeline flanges according to GOST 12815 (GOST R 54432-2011).

• Operating temperature of the gate valve: -60 °С ÷ +600 °С (depending on the material used and the chemical composition of the medium)

• Applications: slurry, waste water, sludge, slag, etc.

• Tightness according to classes A, B, C according to GOST 9544-2005 (GOST R 54808-2011) in the direction of the working medium - one-sided (on request - two-sided). Each gate valve (gate) METAROSSA of the KG series is tested for leaks.

Details of knife gate valve zhongcheng series KG-QU PN10 made of ductile iron DN 40÷2000

Ductile iron KG-QU gate valve (equivalent to Isogate, Weir Minerals, Metso, Sistag, Orbinox, CMO)

Details of the gate valve ZHONGCHENG series KG-QB(V) PN10 made of carbon and corrosion-resistant steels DN 50÷2000

Rising Stem KG-QB Gate Valve (equivalent to Weir Minerals, Isogate, Metso, Sistag, Orbinox, CMO)

Non Rising Stem KG-QV Gate Valve (equivalent to Metso, Weir Minerals, Isogate, Sistag, Orbinox, CMO)

Parts of the ZHONGCHENG KG-QW PN10 knife gate valve made of corrosion-resistant steels with a through blade DN 50÷2000

KG-QW solid blade gate valve (equivalent to Orbinox, Isogate, Weir Minerals, Metso, Sistag, CMO)