KNIFE GATE VALVE - MODEL DCNP

FLOWTURN CAST IRON GATE GLOBE AND CHECK VALVES 5.3

KNIFE GATE VALVE ACTUATOR DCNP/DCNP-B

DIMENSIONS & WEIGHTS - ACTUATED VALVE (MM & KG)

5.3

Flowturn Cast Iron Gate Globe And Check Valves

KNIFE GATE VALVE - MODEL DCNP-B OVERVIEW - BI-DIRECTIONAL

DESIGN

Flanging

ANSI B16.1/B16.5 125lb/150lb

AS 2129 Table D, E

AS 4087 PN14, PN16

ISO 7005-1, PN10, PN16

AS 4331.1 PN10, PN16

EN 1092-2 PN10, PN16

Pressure/Class

Rating

PN10 Rated Body.

Long Term Maximum

Packing & Seat Rating -

10 bar to 250NB

7 bar 300 ~ 450NB

4 bar 500 ~ 600NB

Face to Face Dimensions

AS 640I & MSS SP-81

Test Standards

MSS-SP71, ISO 5208, MSS SP-SP61

Pressure/Temperature

Rating Seat

EPDM 10 bar -10 to 120ºC

Viton 10 bar -10 to 200ºC

Stem Cover

Double Row Thrust Bearings

Stainless Steel Bearing Housing & Grease Nipple

Stainless Steel Safety Guards

Support Plate

Slots to Facilitate Limit Switches

Integral Body

Hard Chrome Plated Stainless Steel Gate for Longer Life

REPLACEABLE SEATS

Encapsulated Bi-directional seats ensure water tight shut-off in both directions. When seats do wear and need replacement, replacing the seat is easy.

GATE DESIGN

Each gate is precision ground and hard chrome plated as a standard. This provides superior abrasion and corrosion resistance. The edges are polished flat.

GUIDING GUIDES

Gate guides at the valve inlet and outlet (top & bottom) ensure alignment of gate throughout it’s travel.

DOUBLE STEM BEARINGS (Handwheel operated only)

At the top of the yoke, our knife gate valves are equipped with two stem bearings in a stainless steel housing and a grease nipple for reduced torque and easy operation.

PACKING

Proprietary multi-layer composite packing system ensures tight shut-off across a wide temperature range. Packing is fully adjustable and for non-hazardous service can be replaced without removing valve from line provided the line has been isolated and the valve is not under pressure. For air or gas applications, some packing leakage will occur, especially at higher pressures.

FLOWTURN CAST IRON GATE GLOBE AND CHECK VALVES 5.3

KNIFE GATE VALVE - MODEL DCNP-B

Standard Design Features

Bi-directional wafer style, fully lugged, rising stem full flow integral body knife gate offering true bi-directional tight shut off (resilient seat) clockwise close on-off operation. The DCNP-B model has multi row composite packing system and double row stem bearings (handwheel operated only). Stainless steel safety guards and stem protector are also included. Suitable for pulp, sludge, water, chemicals, bio-mass, slurry, bio-gas (not air tight). The gate is fully guided in the body throughout its entire travel to provide true bi-directional service.

Body

• Mono block integral body for extra strength and leak tightness.

• Cast-in gate guide claws (top & bottom) ensure a tight energised seal and eliminates potential valve shut-off clogging while avoiding seat damage.

• Unique multi row packing system comprises braided PTFE/silicon/PTFE-sheet to form a composite sealing system ensuring drip tight shut-off for different media/temperature and pressure applications.

• Suitable for dead-end service.

• Fully lugged design provides improved body strength & rigidity.

• Integral body ensures no shell leakage.

• Full port design minimises pressure drop and maximises flow capacity.

Gate

• Gate surface is polished and hard chrome plated both sides.

• Polished flat both faces and edges all around seating surface. The machining of the body inside, allows for more control in the different dimensions tolerances. This machining results in a perfect adjustment of the body with the gate and seal, reducing the required torque to maintain the tightness and avoiding any build-up of solids that could prevent the valve from closing. The valve design allows an end-of-line installation. Full port design in all cases for greater flow capacity and minimal pressure drop. The gate is guided on the whole stroke to ensure bi-directional shutoff.

Seat

• Precision design side-entry seat is replaceable, reducing the cost of maintenance.

• Replaceable seat is encapsulated into the integral valve body and ensures bi-directional flow.

• For air or gas applications leakage will occur especially at higher pressures.

• Seat is encapsulated into the body in contact with the gate all over its perimeter. This layout provides an adequate water tightness and seamless liquid flow in both directions. The seat is protected by the body itself.

Other Features

• Stainless steel safety guards

• Stainless steel stem cover tube

• Grease nipple to ease bearing lubrication

• Two roller thrust bearings minimises torque for operation with stainless steel bearing housing (handwheel operated only).

Applications

Dependant on Body/Seat/Configurations - Sludge, Storm Tanks/Mining/Waste Water Treatment/Chemical Plants/Power Plants/ Steel Industry/Aquaculture/Sewerage/Syrup/Sugar Manufacturing and Chemical Processing and bio gas (not air tight shut-off). Industry/Aquaculture/Sewerage/Coal/Slurry/Syrup/Slag/Sugar Manufacturing and Chemical Processing (not recommended for Air/ Gas).

FLOWTURN CAST IRON GATE GLOBE AND CHECK VALVES 5.3

KNIFE GATE VALVE - MODEL DCNP-B

CLOSE UP VIEW SEAT