DN250 Pneumatic Operated Unidirectional Knife Gate Valve

Pneumatic actuator unidirectional Knife Gate Valve,lug type/wafer type

Feature:

This type of knife gate is a unidirectional wafer valve used on industrial pipeline for on-off operation. The unique valve structure eliminates potential clogging shutoff when the valve is dealing with flow with particles. Beveled knife gate design also generates great shear stress for easy flow penetration.

Application:

Pulp and Paper/ Mining /Waste Water Treatment/ Food and Beverage/Chemical Plants/ Power Plants/ Steel Industry/Etc.

Design Feature

BODY:

· Cast-in guide claws at the port bottom for gate fixture, instead of a groove, eliminates potential valve shutoff clogging while providing tighter seal. The guide claws also push gate to seat for tight seal in closed position.

· Integral body design ensures easy assembly and 0 shell leakage.

· Full port design minimizes pressure drop and maximize flow capacity.

· PTFE resilient points against gate eliminate metal-metal contact between gate and bo dy.

GATE:

· Beveled knife edge provides strong cutting stress and tight sealing.

· Gate thickness can be increased to meet higher pressure.

· Gate surface is well polished at both sides for tight seal and less jamming.

· Gate is hard chrome coated for metal sealing valve.

SEAT:

· Side-entry seat is replaceable, reducing the cost of maintenance.

· L-shape seat retainer locks seat into valve body and covers seat side to prevent direct flow flushing.

Other:

· Stem cover is available to ensure long service life for stem.

· Two thrust bearings minimizes torque for operation.

· Grease nipple is available to ease bearing lubrication.

Technical Data

Sizes:

DN 50 to DN 600 (larger diameters on request)

Seat Material:

Resiliant: PTFE/RPTFE/PEEK/DEVLON/NYLON

Metal: Tungsten Carbide/Satellite/Ni60

Pressure Rating:

DN 50 to DN250 10 Bar NPS 2-10 150 psi

DN 300 to DN450 7 Bar NPS 12-18 90 psi

DN 500 to DN600 4 Bar NPS 20-24 60 psi

Actuator :

Hand wheel (Rising & Non-rising Stem), Electric,Bevel Gear ,Pneumatic (single & double-acting),Chain wheel ,Hydraulic,Lever

*Note: for other options, please contact us for availability.

Face to Face:

Vendor Standard (Wafer Type)

ISA S75.04, IEC/DIN 534-3-2 (Flange Type)Standard flange connection:

EN1092, GB/T 9113,ASME B16.5,AS 2129/4087,JIS B2220,Others on request

Certificate:

CE, ISO9001