ASTM A351 CF8M Knife Gate Valves, DN250, PN16, Lug, Electric

Product Name: ASTM A351 CF8M Knife Gate Valves
Type: Bidirectional Knife Gate Valve
Body Material: ASTM A351 CF8M, Cast Stainless Steel
Seat Material: VITON (200°C)
Nominal Size: DN250, 250 mm, 10 Inch
Nominal Pressure: PN16, Class 150 LB
End Connection: Lug Type
Operation: Electric Actuator

The maintenance-free compact cross seal, featuring a double seal lip profile, ensures a tight shutoff and can be adjusted without interrupting operation. A self-cleaning effect of the bidirectional knife gate valve is achieved through flush-out corners in the body and the cutting edge under the gate. Solids and fibers are cut by the cutting edge before tightening against the elastic seat. The gate's guidance is momentarily interrupted during the stroke, allowing dirt to be ejected. Bidirectional shutoff is achieved by the lateral gate surfaces and the elastic seat, which is integrated into the body. The seat is chambered and pre-stressed for durability. The high-quality finish of both the guide and sealing surfaces guarantees long service life and a tight shutoff. The lateral guidance prevents gate fluttering in both flow directions and during throttling.

Technical Specifications

» Nominal Diameter: NPS 2–32 Inch (DN50–DN800)

» Design Pressure: PN10, PN16, CLASS 150

» Temperature Range: -29°C to 200°C

» Max Working Pressure:

  DN50–DN250: 10 bar

  DN300–DN450: 7 bar

  DN500–DN600: 4 bar

» Body Material: GGG40, ASTM A351 CF8, CF8M, Special Alloys, etc.

» Disc Material: Stainless Steel, Chrome Plated, Special Alloys, etc.

» Seat Material: VITON (200°C), Polyurethane (120°C)

» Flange Standard: GB/T 9113.1, JB/T 79.1, HG 20592, ASME B16.5, EN 1092-1

» Face-to-Face: MSS SP-81

» Operation: Manual, Pneumatic, Electric, Hydraulic

Product Features

» The two-piece knife type gate valve is composed of two valve bodies combined, and the inside and outside of the valve body are CNC precision machined to achieve higher overall accuracy and more stable sealing performance.

» The valve adopts a full bore design, and the bidirectional sealing structure can achieve bidirectional pressure bearing without slag accumulation, leakage, or erosion, greatly improving the service life of the valve and enhancing its pressure bearing capacity.

» Two piece knife gate valve is more suitable for various media such as slurry, liquid, mud, gas, etc. It has high flushing force, high sealing requirements, harsh operating environment, high wear resistance, high corrosion resistance and other special working conditions.

» The valve seat adopts a U-shaped integrated hot melt injection rubber sealing ring.

Application

» Mining: ball mill, cyclone, flotation, magnetic separation, tailings reduction, concentration

» Coal washing (coal slurry separation)

» Paper making

» Slag discharge

» Electricity, flue gas desulfurization, fuel transportation

» Sand water mixture

» Wastewater treatment