Features and benefits
● Bonneted design: Standard body-bonnet joint with an efficient non-asbestos reinforced fiber or PTFE gasket.
● Easy repacking in-line (Valve should be de-pressurized when repacking in-line.)
● Beveled knife-stem connection locks the knife blade tight against the seat. The seat is sealed by positive torque closure – not media pressure – unlike any other knife gate valve.
● Raised-face seat: A groove around the seat collects particles pushed aside by the knife and prevents clogging. When the valve opens, media pressure cleans the groove.
● Lapped seat ensures tight closure.
EASY OPERATION
● Lower running torque due to reduced friction: Friction between stem and packing in bolted bonnet knife gate valve is far less than the friction between the blade and the packing in a standard knife gate valve.
● Low-friction, acid-resistant Ni-Resist stem nut
● Valves can operate with smaller actuators than standard knife gate valves, due to lower running torque.
ALL CAST STAINLESS STEEL DESIGN
● One-piece stainless steel, fully-lugged, cast body is stronger than welded bodies and less subject to distortion due to thermal stress. Posts are stainless steel instead of chrome-plated carbon steel for longer life.
● Designed for vertical or horizontal line operations.
● Standard wafer, TAPPI face-to-face for easy replacement of leaky standard knife gate valves.
● Maintenance and adjustment-free. Long cycle life.
● Suitable for most pulp and paper applications. Can be used throughout the mill as a general-purpose knife gate valve up to 5% pulp consistency.
Features and benefits
● Bonneted design: Standard body-bonnet joint with an efficient non-asbestos reinforced fiber or PTFE gasket.
● Long-life leak proof stem seal: Standard cylindrical packing chamber with 125 RMS wall finish, burnished non-rotating stem and PTFE or graphite packing rings. Many times the cycle life of a standard knife gate valve.
● Virtually no contamination of the environment: No dewatering of stock, unlike standard knife gate valves.
● Easy repacking in-line. (Valve should be de-pressurized when repacking in-line.)
TIGHTER SEATS WITH POSITIVE TORQUE CLOSURE OF KNIFE
● Beveled knife-stem connection locks the knife blade tight against the seat. The seat is sealed by positive torque closure – not media pressure – unlike most other knife gate valves.
● Raised-face seat: A groove around the seat collects particles pushed aside by the knife and prevents clogging. When the valve opens, media pressure cleans the groove.
● Lapped seat ensures tight closure.
● Crimped resilient seat ensures longer service life.
BYPASS TO PREVENT CLOGGING OF BONNET
● Bypass lets pulp circulate inside the bonnet when valve is opened, preventing clogging.
EASY OPERATION
● Lower running torque due to reduced friction: Friction between stem and packing in bolted bonnet knife gate valve is far less than the friction between the blade and the packing in a standard knife gate valve.
● Low-friction, acid-resistant Ni-Resist stem nut:
● Valves can operate with smaller actuators than standard knife gate valves.
ALL CAST STAINLESS STEEL DESIGN
● One-piece stainless steel, fully-lugged, cast body is stronger than welded bodies and less subject to distortion due to thermal stress. Posts are stainless steel instead of chrome-plated carbon steel for longer life.
● Designed for vertical or horizontal line operations.
● Standard wafer, TAPPI face-to-face for easy replacement of leaky standard knife gate valves.
● Maintenance and adjustment-free. Long cycle life.
● Suitable for most pulp and paper applications. Can be used throughout the mill as a general-purpose knife gate valve up to 5% pulp consistency.
Features and benefits
● Designed to handle light slurries, pulp stock and corrosive fluids in process industries.
● Meets TAPPI standard TIS 405-8 and MSS SP-81 for wafer-type knife gate valves.
● Lug bolt pattern matches ASME B16.5 Class 150. Holes tapped.
● 150 psig (10.3 bar) maximum working pressure. 150°F (65°C) maximum working temperature. Applications outside of these conditions require special design considerations.
● These high quality metal-seated knife gate valves with ground knife gates and lapped seating faces have maximum leakage rate 4-10 times less than the permissible rates shown in TAPPI 405-8 & MSS SP-81.
● Needle bearings on NPS 14–24 (DN 350-600) valves.
● Available with actuation.
Features and benefits
● Designed to handle light slurries, pulp stock and corrosive fluids in process industries where applications call for resilient seat with zero leakage to 150 psi (10.3 bar) in main direction and limited tightness in opposite direction, at low pressure.
● Replaceable, resilient crimped seat rings on NPS 18 (DN 450) and larger.
● Meets TAPPI standard TIS 405-8 and MSS SP-81 for wafer type knife gate valves.
● Non-clogging large port.
● 150 psig (10.3 bar) maximum working pressure. 150°F (65°C) maximum working temperature. Applications outside of these conditions require special design considerations.
● Needle bearings on NPS 14 –24 (DN 350-600) valves.
● Available with air actuation.
● Lug bolt pattern matches ASME B16.5 Class 150. Holes tapped.
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