Square Knife Gate Valve

Square Knife Gate Valve is a fabricated square or rectangular port low-pressure valve for fluids with :

High solids concentration or solids,

Mainly used in bulk handling

Silo outlet applications in industries such as Chemical Plants, Power Plants, Food and Beverage, Wastewater Treatment Plants, Mining, Etc.

SPECIFICATIONS : SQUARE KNIFE GATE VALVE

Sizes : Size 8’’ x 8’’ to Size 24’’ x 24’’ (larger diameters on request)

Working Pressure :

8’’ x 8’’ : 35 PSI
10” x 10” : 30 PSI
12” x 12’’ : 30 PSI
14” x 14” : 21 PSI
16’’ x 16’’ : 21 PSI
18’’ x 18’’ : 18 PSI
20’’ x 20’’ : 14 PSI
24’’ x 24’’ : 14 PSI (Above Sizes on Request)

Seat Types :

METAL / METAL : High temperature, High density media application , Positive shut off

RESILIENT : Temperature according to seat material, Replaceable seal retainer plates.

Temperature Range : up to 1200°F (650°C)

Materials : Valves are available in solid or wetted parts in any weldable alloy, Stainless Steel, Hastelloy, Inconel, Monel.

Abrasive Service : Optional abrasion & corrosion resistant designs with hard facing like Stellite, Tungsten Carbide, Pulse Fusion.

Valve Style : Bonnet less Valve, Bonneted Valve

MATERIAL OF CONSTRUCTION OF SLIDE GATE VALVE :

BODY :

Unidirectional fabricated type square knife gate valve

Cast mono block design.

Internal cast gate wedges and guides allow for tighter shut off.

Square port design for greater flow capacity and minimal pressure drop.

Internal design avoids any build up of solids that would prevent valve from closing.

GATE:

Standard stainless steel gate.

Polished gate on both sides for a greater seal between the packing and the seat.

Bottom of the gate edge bottom is machined to a bevel to shear off the solids during the final closing stage.

PACKING CHAMBER :

Several lines of braided fibre plus an EPDM O-ring for long life, with an easy access packing gland ensuring a tight seal.

Long-life braided packing is available in a wide range of materials.

STEM :

Rising & non-rising stem configurations available

The standard stainless steel stem offers a long corrosion resistant life.

A standard nipple fitted on the hand wheel to lubricate the stem whilst operating the valve

For rising stem hand wheel, a stem protector provides additional protection against dust while the valve is in the open position.

YOKE & SUPPORT PLATES :

EPOXY coated steel (stainless steel available on request).

Compact design makes it robust even in the most severe conditions.

Reinforced design is standard starting from size 14’’ x 14’’.

Manual (hand wheel and bevel gear),

hydraulic, pneumatic (double-acting cylinder)

electric actuation options available