Linder

W series by WEY Sistag

W series by WEY Sistag

W series by WEY Sistag

WEY Valves

W Series: The Benchmark for Severe Service.

When standard solutions fail, the W Series from Swiss manufacturer WEY prevails. Designed to exceed limits, it sets a new standard for flexibility and performance. LINDER is proud to offer this model, guaranteeing you a definitive advantage over any competition.

Application areas

Mining

Characteristics W series

Nominal sizesDN 50 – 1400 mm
Pressure ratingPN 0 – 50 bar
MaterialStainless steel, Carbon steel, Cast tin-bronze, Cast aluminum-bronze
Flange drillingANSI Class 150, ANSI Class 300
Face to face dimensionMSS-SP135 Class 150 short, MSS-SP135 Class 150 long, MSS-SP135 Class 300 short, MSS-SP135 Class 300 long
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Actuation

Actuator Options

One body, several ways to drive it — chosen to suit your application.

  • Handwheel

  • Bevel gear

  • Pneumatic cylinder

  • Hydraulic cylinder

  • Electric actuator

Engineering

Design Details

The solutions that set this product apart — each one measurable on site.

  • The robust universal bonnet can be used for a wide variety of actuator types. Many different add-on parts can be easily fitted.

  • A unique transverse seal, consisting of a transverse seal profile and packing compound, makes the body bubble-tight towards the atmosphere.

  • The transverse seal can be repacked at any time and under full pressure using the lateral packing screws.

  • A mechanically retained round cord seal creates a bubble-tight shut off on the gate edge.

  • The gate is mechanically guided over the full stroke.

  • In the closed end position, the gate is also mechanically supported.

  • With its optimized gate geometry, accumulated media is pushed out of the gate guide and flushed out into the bore by the increased flow.

  • The flange threads make assembly considerably easier, while also allowing for dead-end installation.

Downloads

Documents

Data sheets, instruction manuals, declarations of conformity and CAD files.

Product Description

Conquer the Most Demanding Applications: The WEY SISTAG W Series Knife Gate Valve

In the harsh environments of industry, where abrasive slurries, corrosive chemicals, and extreme pressures are the norm, standard valves fail. Compromise is not an option when it comes to safety, efficiency, and operational continuity. This is the domain of severe service. This is where ordinary equipment reaches its limit, and the extraordinary begins.LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ, as the Official Authorized Dealer in Turkey for the prestigious Swiss manufacturer WEY SISTAG, introduces the ultimate solution: The W Series Knife Gate Valve. Engineered not just to meet challenges but to redefine what is possible in flow control for Turkish industries.

The Pinnacle of Swiss Severe-Service Engineering

The WEY SISTAG W Series represents the culmination of decades of relentless Swiss pursuit of perfection. Born from a philosophy that no application is too severe, this valve series has been engineered to its absolute limits. The result is a product offering unparalleled flexibility across nominal sizes (50 – 1400 mm), material grades, and pressure ratings (0 – 50 bar), creating an incredible scope of industrial application. We guarantee it will outperform conventional alternatives in any severe-service situation encountered in Turkey's robust industrial landscape.

Unmatched Design. Uncompromising Performance.

Bubble-Tight Integrity, Guaranteed

A unique, patented transverse seal system—combining a specialized elastomer profile and advanced packing compound—ensures the valve body is hermetically sealed towards the atmosphere. This critical safety and environmental feature can be repacked under full line pressure at any time via lateral screws, eliminating the need for costly system shutdowns and downtime for maintenance.

Superior Shut-Off and Unobstructed Flow

A mechanically retained, precision-molded round cord seal creates a bubble-tight shut-off on the gate edge. The reinforced gate is mechanically guided and supported through its full stroke, preventing vibration, deflection, and misalignment. The optimized gate geometry actively pushes accumulated media out of the gate guide and back into the flow bore, preventing sediment build-up and ensuring a clean, efficient, and energy-saving flow path.

Engineered for Operational Efficiency

The robust, universal bonnet design accommodates a comprehensive range of actuators (manual handwheel, pneumatic, hydraulic, electric), providing unmatched flexibility. Integrated flange threads significantly simplify field assembly, disassembly, and allow for reliable dead-end service, reducing installation time and labor costs.

Built for Turkey's Most Critical Industrial Applications

The WEY SISTAG W Series is the valve of choice for sectors where equipment failure translates to significant production loss and safety risks:

Mining & Mineral Processing

Masterfully handles abrasive mining slurry, sinter water, tailings, and process minerals with exceptional wear resistance, ensuring continuity in Turkey's vital mining sector.

Chemical & Petrochemical

Constructed from material combinations like Stainless Steel 316/316L, Ni-Resist, Duplex Steel, and lined with Aflas or PTFE to withstand highly corrosive media and aggressive process chemistries.

Pulp & Paper Industry

Reliably manages high-density pulp stocks, recycled fiber slurries, and aggressive bleaching chemicals, offering durability that reduces maintenance cycles.

Power Generation & Energy

Built to endure in fly ash handling, FGD (Flue Gas Desulphurization) slurries, bottom ash, and other critical power plant services, contributing to uninterrupted energy production.

Water & Wastewater Treatment

Ideal for raw sewage, sludge, and treated water applications, with configurations that prevent clogging and ensure reliable operation in municipal and industrial treatment plants.

Advanced Material Selection & Corrosion Protection

We offer a comprehensive range of body materials including Carbon Steel (WCB), Stainless Steel (CF8/CF8M), Cast Bronze, and specialized alloys. Critical wear components are available in hardened stainless steel or coated with advanced materials like tungsten carbide. Combined with superior corrosion protection protocols—such as E-coat (electrocoating) for valve bodies and epoxy powder coating for topworks—the W Series is engineered for maximum longevity in Turkey's diverse and challenging industrial environments.

Why Source the WEY SISTAG W Series Through LİNDER in Turkey?

Choosing LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ means more than a transaction; it signifies a strategic partnership for industrial excellence.

Official Conduit to Swiss Precision

As the official dealer, we guarantee access to 100% genuine WEY SISTAG products. You receive the full benefit of Swiss engineering integrity, original manufacturing quality, and all necessary international certifications, directly supported in Turkey.

Local Engineering Expertise, Global Standards

Our Turkish engineering team possesses deep, localized knowledge of the W Series and its applications across Turkey's key industries. We provide expert selection, hydraulic calculation, and bespoke technical support tailored to your specific project requirements and operational challenges.

Complete Turnkey Valve Solutions

We provide a holistic package—from the valve body to the perfectly matched pneumatic, hydraulic, or electric actuator from leading brands. Our service extends to comprehensive engineering support for installation, commissioning, and lifecycle maintenance.

Optimized Total Cost of Ownership (TCO)

The legendary durability, ease of maintenance, and repairability of the W Series, backed by our local inventory of spare parts and responsive service network, drastically reduce unplanned downtime and extend service intervals. This delivers a significantly lower Total Cost of Ownership and superior long-term return on investment for your operations.

Stop Compromising. Start Dominating Your Most Challenging Flow Control Applications.

LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ is your dedicated gateway to Swiss severe-service valve technology in Turkey. Let us demonstrate why the WEY SISTAG W Series is the definitive knife gate valve solution for maximizing your operational reliability and productivity.