Wey Knife Gate Valve Options & Accessories

Wey Valve offers a large variety of actuation, controls and accessories along with it‘s high performance knife gate valves. Due to servicing a wide range of industries including mining, chemical and petrochemical, power generation, pulp and paper, waste water and many more, Wey brings applications experience and customization capabilities to the table to find the right solution for our customer‘s needs. Our know-how translates into sound advice, unrivalled product competence and top service. The aim: to provide superior safety and achieve customer satisfaction right from the start. That’s the Wey. Always has been and always will be.

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MATERIALS OF CONSTRUCTION

There are many different materials that can be used in the design of a Wey High Performance Knife Gate Valve. A typical Wey Knife Gate Valve will use several different materials within its construction to achieve the best combination of functionality and cost. The following briefly shows the most common materials that Wey uses for the critical valve parts in their design of an effective high performance knife gate valve.

– 316 Stainless Steel– 317 Stainless Steel– A890 Grade 4A (Super Duplex) – A995 Grade 5A (Super Duplex)– 904L Stainless Steel – Hasteloy C – Avesta 254 SMO– Avesta 654 SMO– Titanium– A216 WCB Carbon Steel – Cast Iron– Cast Ni-Resist– Ductile Iron– Ductile Ni-Resist

Seal Material

– Buna N – Viton – TFE – EPDM – Aflas – Hypalon– Polyurethane

Body Material

ECOATECOAT is a proprietary non-stick coating used on valve body and gate. The friction free coating is used on many applications to prevent buildup of media on valve internal parts. The inherent lubricity of this coating also helps to reduce operating forces of the actuator.

– 316 Stainless Steel– 317 Stainless Steel– 904L Stainless Steel– 17.4PH Stainless Steel– Avesta SMO (AL6XN is plate stock for gates)– Hasteloy C – Titanium

Gate Material

– White Buna N– Food Grade EPDM – ETFE – FEP – White Food Grade Viton – Chemraz– Kalrez

Coating and Overlay Option

HVAF CoatingHVAF or High Velocity Air-Fuel is a thermal spray process for deposition of coatings for protection of parts, vessels and structures against abrasion, erosion and corrosion. Application to gate leading edge and face allows for prolonged service life in severely abrasive conditions. A variety of coating options are available. Chromium Carbide and Tungsten Carbide (86WC-10Co-4Cr) are primary coatings used industry wide.

Overlay OptionsThe overlay options in the bore area provide extended service life by means of adding additional protection in the up- and downstream side of the seat area. Primarely used in highly ab-brasive applications. In addtion the overlay option can be used to match your pipe I.D. to create a smooth, laminar flow.

Options:– Chrome Carbide– Tungston Carbide– Polyurethane

ESC CoatingAfter applying the ESC coating the surface of any steel or alloy part converts into an extremely hard (RCH 72), corrosion resis-tant, and self-lubricating platform, with excellent durability in both lubricated and un-lubricated contact.

ACTUATOR OPTIONS

Wey Valve offers an excellent selection of manual, pneumatic, hydraulic or electirc operators to suit your specific needs. The Wey topworks design provides a stable foundation for any style of actuators. Due to the innovative and customizable design of all Wey Knife Gate Valves, it is possible to change the style of actuator even if the valve has already been in service.

Pneumatic Cylinders

Manual Operators

Pneumatically operated cylinders available in double acting or spring return type design. Bore sizes available up to 36’’ tandem DA units. Working pressures available up to 300 psi. Spring re-turn available as “fail close” (preloaded spring with enough force to close the gate upon air loss) or “fail open”, (spring which dri-ves the valve open upon air loss).

Besides a regular handwheel Wey can supply you with fully en-closed, permanently lubricated heavy duty bevel gear operators provide high torque and smooth operation. Used to reduce rim pull in larger sizes requiring excessive force or to reposition hand wheel to desired direction.

Hydraulic Cylinders

Heavy duty hydraulic cylinders up to 3,000 psi hydraulic working pressures. Double acting cylinder available in bore sizes from 1.50’’ to 16’’. Cylinders can be operated by exis-ting hydraulic lines or portable power units. Very useful in remote applications such as tailings lines.

Electric Motor

Electric multi-turn actuators available in voltages from 120 to 600 VAC. Motors supplied in many configurations inclu-ding integrated or remote controls, NEMA 7 explosion proof construction, heaters, position indicators, declutch and manual overrides.

ACCESSORIES & OTHER OPTIONS

Wey offercs customizable options and accessories that can enhance the valve performance in specific applications. Thanks to our customizable design we can help our customers with our tailor-made solutions to increase profit through increased productivity and less process down-time.

Bore & Body Options

Wear RingThe Wear Ring is fitted into machined recess on the inlet side of the valve to stop abrasive media from eroding the body. Depending on the wear ring materilal, this option can drastically extend the life time of your valve.

Wear Ring Options:– Ni-hard– Tool Steel– Ceramic

Pipe I.D. Lining:– Chrome Carbide– Tungston Carbide– Polyurethane

V-PortThe V-Port option is used in throttling or modulating services, usually in combination with a positioner.

Powder PacThe Powder Pack provides smooth powder flow without jamming. Any solids in gate guide area are pushed ahead of the gate. Solids drop out of groove area through slots that are machined in lower gate guides.

Gate

Chrome Carbide Overlay

Hardened Wear Ring

HVAF

Body

Chrome Carbide or Urethane Liner

HVAF

Elastomer Seat (mechanically retained)

– Solinoid– Proximity Switches– Mechanical Limit Switches – Pneumatic positioner – Electronic positioner

Controls

Other Accessories

Chest LinerDelrin or TFE liner within chest provides smooth surface for gate to slide on during cycling. Reduces tolerance between gate and body thus preventing solids from entering the chest area. Liner is mechanically retained and replaceable. Often used in concert with gate guides for high cycle applications.

Gate Guides Mechanically retained guides in Bronze, TFE or Delrin along gate sliding area. Used in applications of high cycling.

Position IndicatorThis is a highly visible scale enabling users to determine position of the valve from a distance.

LockoutThere are two types of lockouts available. The rotary lockout for hand wheel operated valves uses a crab claw style multi-position lockout whereas the hardened hitch pin style lockout is used to safely lock out valve in open or closed position.

OSHA Yoke GuardSerrated steel cover placed around four post top works to protect ope-rator from valve moving parts.

Weyone ClevisThe high visibility coating on the clevis is for ease of position recognition. Due to its capability of absorbing day light, the Weyone Coating will glow during the dark.

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