Conquer Abrasive Media with Unmatched Reliability

In the most punishing industrial environments—from biogas plants handling abrasive manure and substrates to mineral processing and wastewater treatment—conventional valve failure is a costly risk. Downtime, leaks, and inefficiency plague operations that rely on standard equipment not designed for the challenge.

This is where Swiss precision engineering meets industrial necessity. LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ is proud to be the Official Authorized Dealer in Turkey for the world-renowned Swiss manufacturer WEY SISTAG. We deliver engineered superiority, starting with the flagship VG Series Knife Gate Valve—a system not merely adapted, but born from the ground up to dominate in the most demanding applications.

The VG Series: A Paradigm of Purpose-Built Design

While standard valves falter, the VG Series is defined by its application-specific intelligence. Featuring a specialized flange design for direct, seamless integration into biogas and industrial piping systems, it eliminates adaptation issues. Manufactured in high-strength cast iron (EN-GJL-250) for nominal sizes DN 150 and DN 200, it is the bedrock of a secure and continuous process flow.

Core Technical Specifications at a Glance

• Nominal Sizes (DN): 150 – 200 mm
• Pressure Rating: 0 – 4 bar
• Body Material: High-Strength Cast Iron (EN-GJL-250)
• Flange Standard: Special application-specific drilling
• Face-to-Face: EN 558 Series 20
• Corrosion Protection: Durable EKB Powder Coating

Engineered Superiority: Features That Define the Next Generation

The WEY SISTAG VG Series integrates patented innovations that systematically address the failure points of ordinary valves.

1. Guaranteed Sealing Integrity, Zero Downtime

• Bubble-Tight Transverse Seal: A unique sealing system combining a specialized profile and packing ensures an absolute leak-proof seal between valve body and atmosphere.
• Live-Loaded Repacking Function: The transverse seal can be repacked under full pressure during operation via lateral screws. This revolutionary feature eliminates costly system shutdowns for maintenance.
• Mechanically Retained Round Cord Seal: Provides perfect, bubble-tight shut-off on the gate edge, preventing media seepage and ensuring total control.

2. Intelligent Design for Harsh Environments

• Self-Cleaning Gate Geometry: An optimized gate design actively expels accumulated abrasive media back into the bore during operation, preventing jamming and wear.
• Heavy-Duty, Accessible Yoke: Allows simple mounting of limit switches and enables easy, one-side removal for effortless maintenance and part access.

3. Unshakeable Mechanical Stability

Full-stroke gate guidance and end support ensure precise alignment and a secure seal, even under pressure surges and vibration, guaranteeing long-term structural integrity.

Material Excellence & Configuration Flexibility

Every component is selected for maximum endurance. The standard material specification is a testament to its robustness:

• Body: EN-GJL-250 (Cast Iron)
• Gate: 1.4301 (Stainless Steel)
• Seal: EPDM
• Stem/Piston Rod: 1.4104 (Stainless Steel)
• Topwork: Carbon Steel with EKB Coating

Alternative materials are available upon request for specialized corrosive or thermal applications.

Complete Actuation Versatility

The VG Series is engineered for seamless integration with your control system, compatible with:
Handwheel, Bevel Gear, Pneumatic Cylinder, Hydraulic Cylinder, and Electric Actuator.

Primary Application Areas

The VG Series is the definitive choice for industries where reliability is non-negotiable:

• Biogas & Organic Waste: Mastery in handling liquid manure, organic substrates, and abrasive slurries.
• Water & Wastewater Treatment: Reliable performance in sludge, slurry, and process water lines.
• Mining & Mineral Processing: Durable control for tailings, slurries, and abrasive process media.
• Power Generation & Chemical Processing: Robust solution for demanding auxiliary lines.

Why Partner with LİNDER for Your WEY SISTAG Solutions?

Choosing LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ as your gateway to WEY SISTAG means investing in a partnership anchored in expertise and local support.

• Official Turkish Dealer: We guarantee genuine WEY SISTAG products, direct from manufacturer specifications, with full warranty and traceability.
• Engineering & Technical Support: Our specialized engineering team provides expert selection, system calculation, and seamless project integration support.
• End-to-End Service: From initial consultation and sizing to supply, installation supervision, and after-sales service, we offer a comprehensive single-source solution.
• Proven Industrial Partner: Our competence is validated by references from key Turkish industries and a portfolio of successful project completions.