GGG40 Knife Gate Valve, DI, DN125, PN16, PU Lined, Electric

Product Name: GGG40 Knife Gate Valve
Type: Bidirectional Knife Gate Valve
Body Material: Ductile Iron GGG40
Nominal Size: DN125, 125 mm, 5 Inch
Nominal Pressure: PN16, Class 150 LB
End Connection: The Round, Full Bore
Lining Material: Full PU (Polyurethane 150°C)
Operation: Electric Actuator

Polyurethane, when used in immersion, exhibits wear resistance that is 8 times greater than carbide, 7 times that of vulcanized rubber, and 3 times that of ultra-polymer polyethylene. Its exceptional wear resistance to solid particles, combined with its elasticity and mechanical properties, allows it to absorb the impact of particles and minimize wear. By incorporating polyurethane into the design of valves, we significantly increase their lifespan. The Full PU Lined Slurry Knife Gate Valve is designed for bi-directional, tight on-off service in abrasive slurry applications. These valves feature a full polyurethane lining, with the wear-resistant material injected using a whole-mold process, ensuring all media are encased in the lining for comprehensive wear protection. This results in excellent wear life and 100% positive shutoff of abrasive slurry. These valves are particularly well-suited for mining applications.

Technical Specification

» Normal Size Range: NPS 2-24 Inch (DN50-DN600)

» Normal Pressure Rating: PN6, PN10, PN16, CLASS 150

» Connection Type: The round, Full bore

» Seat and Lining Material: Polyurethane (PU)

» Body Material: GGG40, ASTM A216 WCB, A351 CF8, CF8M, Special Alloy, etc.

» Pressure Test Standards: GB/T 13927, MSS SP-81

» Face-to-Face Dimensions: GB/T 12221, MSS SP-81

» Operation Methods: Handwheel, Bevel Gear, Chain Wheel, Pneumatic, Electric

» Service Temperature: -20°C to 150°C

Bidirectional Sealing

It is composed of a two-piece valve body and an integral polyurethane combination, effectively blocking direct contact between the medium and the valve body, which can greatly improve the overall wear resistance and sealing of the valve. Positive full pressure can achieve zero leakage, and reverse full pressure reflux can achieve zero leakage.

Wear Resistant Polyurethane Lining

This product adopts an integral mold column fully lined wear-resistant polyurethane structure, made of imported BASF polyurethane, which has the characteristics of wear resistance, low temperature resistance, aging resistance, high hardness, and excellent elasticity;

The bottom of the valve seat adopts a groove free design, which is not easy to block and has no residue. The pipeline is easy to clean, effectively improving the sealing effect of the knife gate valve and preventing leakage when the valve is closed.

Full Port

This valve is a full bore cut-off valve. After the valve plate is opened, it is lifted into the valve chamber. The valve plate does not directly contact the medium, avoiding wear and tear caused by medium erosion and effectively extending the service life of the valve plate.

Scraper Blade

When the valve plate is moved up and down, it plays a role in self-cleaning the adhesion of slurry on the surface of the valve plate, preventing the surface of the valve plate from clumping, avoiding an increase in switch torque or blockage, and greatly extending the service life of the intermediate seal.

Valve Plate

Adopting thickened stainless steel valve plate, the surface is ground and polished, and subjected to wear-resistant treatment. Valve seat and intermediate sealing structure, If there is wear and tear, the accessories can be replaced on site, and the updated product can be restored to its original service life, greatly saving the supply cycle of newly installed equipment.

The feature of replaceable valve seat and packing, develops out a continuous service life. Seat and packing can be replaced on site. After replacement, the product can regain its original service life, with replacement costs being only 20-30% of the total cost of a new unit.