Uncompromising Flow Control: The WEY SISTAG VS Series Knife Gate Valve. Engineered in Switzerland, Mastered by LİNDER in Turkey.

In the most demanding industrial environments across Turkey—where abrasive slurries, corrosive chemicals, and viscous media define daily operations—compromise is not an option. Your processes demand valves that don’t just function but excel; equipment built to last for decades, designed for zero leakage, and engineered for total reliability under extreme pressure.

This is the standard set by Swiss precision. This is the performance guaranteed by WEY SISTAG. LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ is the proud and official authorized dealer for the Swiss manufacturer WEY SISTAG in Turkey, bringing you the pinnacle of industrial flow control technology. We provide more than just supply; we deliver complete engineered solutions, backed by our in-depth local engineering expertise, project management, integrated logistics, and technical service support.

The VS Series Advantage: Redefining Cost-Efficiency with Swiss Resilience

Introducing the revolutionary WEY SISTAG VS Series Knife Gate Valve—a masterpiece of intelligent design that delivers outstanding cost-efficiency without sacrificing the legendary performance synonymous with Swiss engineering.

The competitive edge of the VS Series lies in its ingenious semi-lug design. This innovative engineering results in a remarkably lightweight and compact valve body, offering significant savings in material costs, shipping, and installation effort. Available in robust stainless steel, it provides an exceptional balance of strength and value. Despite its optimized profile, the VS Series is engineered to deliver maximum reliability and durability, standing resilient against the toughest conditions found in Turkish mining, chemical, and water treatment plants.

Core Engineering Principle: Zero-Emission Maintenance

A fundamental tenet of WEY SISTAG design is enabling maintenance without process interruption. The VS Series, like all premium WEY valves, can be repacked under full line pressure. This critical feature ensures zero leakage to the atmosphere throughout the valve’s entire lifecycle, safeguarding both plant uptime and environmental safety—a non-negotiable requirement in modern industry.

Engineered for Superior Performance: Key Differentiating Features

The WEY SISTAG VS Series integrates features that directly solve common operational challenges in industrial valve applications:

Robust, Service-Friendly Metal Yoke

The valve features a heavy-duty metal yoke designed for simple and optimal mounting of mechanical or inductive limit switches. Engineered for unparalleled serviceability, the yoke can be removed from one side, providing technicians with effortless access to internal mechanical parts for swift maintenance and precise adjustments, minimizing downtime.

Unique Transverse Seal System

At the heart of its emission control is a proprietary transverse seal. This system, utilizing a specialized sealing profile and high-performance packing compound, guarantees a bubble-tight seal between the valve body and the atmosphere, effectively eliminating fugitive emissions and meeting stringent environmental standards.

Optimized Self-Cleaning Gate Geometry

The gate is not a simple blade; it is an intelligent component. Its advanced geometric design acts as a self-cleaning mechanism, pushing accumulated solids and media out of the gate guide and flushing them back into the pipeline bore during operation. This prevents material build-up, ensures a clean shut-off, and reduces wear.

Mechanical Support in Closed Position

When fully closed, the gate receives direct mechanical support, providing unmatched stability and preventing deflection or vibration under high differential pressure. This guarantees a secure, reliable seal and protects the integrity of the seating surfaces.

Technical Specifications: WEY SISTAG VS Series

• Nominal Diameter (DN): 50 – 900 mm
• Pressure Rating (PN): 0 – 10 bar
• Standard Body Material: AISI 316 Stainless Steel (Special alloys available on request)
• Flange Standard: ANSI Class 150
• Face-to-Face Dimension: MSS-SP-81
• Operating Temperature: -20°C to +120°C (dependent on seal material)
• Standard Seal Material: Aflas® (Excellent chemical and temperature resistance)

Proven Applications Across Turkish Industry

The versatility and robustness of the WEY SISTAG VS Series make it the ideal choice for a vast spectrum of demanding applications throughout Turkey:

Energy & Environmental

Biogas plants (abrasive substrates, silage, manure), power generation (FGD scrubber slurries, ash handling), and water treatment (raw water, sludge, digested sludge, seawater intake).

Process Industries

Chemical & Petrochemical (corrosive acids, alkalis, solvents, viscous pastes, bitumen), Pulp & Paper (all pulp stock grades, lime mud, chemical cooking liquors), and Cement (slurry, dust).

Infrastructure & Manufacturing

Municipal wastewater and stormwater management, food & beverage processing (syrups, juices, mashes, powders), and general industrial water circuits.

Complete Actuation Solutions from LİNDER

To ensure seamless integration into your automated processes, LİNDER supplies the complete VS Series with a full range of actuation options:

• Manual Operation (Handwheel / Lever)
• Bevel Gearboxes
• Pneumatic Actuators (Double-Acting / Spring-Return)
• Hydraulic Actuators
• Electric Motor Actuators

Our engineering team will specify the perfect actuator for your required torque, speed, and control interface.

Your Trusted Partner for Swiss Valves in Turkey

Choosing the WEY SISTAG VS Series through LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ means more than a transaction. It is an investment in a partnership. You gain direct access to world-class Swiss engineering, coupled with the dedicated local support of Turkey’s leading industrial solutions provider. We ensure correct selection, timely delivery, and lifelong technical support.