MG series by WEY Sistag

Defy the Pressure Limit with the MG Series.
While standard knife gate valves cap at 10 bar, the MG Series is engineered for up to 16 bar, maintaining the same EN 558-20 face-to-face dimension. It combines this superior pressure rating with the proven design features that define a genuine WEY valve. Offered by LINDER, your official dealer for Swiss-engineered WEY solutions.

Application areas
Biogas plants, Mining, Chemical and petrochemical industries, Infrastructure, Coal fired power stations, Food and beverage, Pulp and paper industry, Waste water treatment plants, Water treatment

Characteristics MG series

Nominal sizes
DN 50 – 800 mm
Pressure rating
PN 0 – 16 bar
Material
Stainless steel, Ductile iron, Special material
Flange drilling
PN10, PN16, ANSI Class 150, BS10-D, BS10-E, AS2129-D, AS2129-E
Face to face dimension
EN 558 series 20
Handwheel
Handwheel
Bevel gear
Bevel gear
Pneumatic cylinder
Pneumatic cylinder
Hydraulic cylinder
Hydraulic cylinder
Electric actuator
Electric actuator

Details

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Most known pipe-cleaning methods (e.g., pigs, brush cylinders, etc.) can be used with the body bore, resulting in minimal pressure drops.
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With its optimized gate geometry, accumulated media is pushed out of the gate guide and flushed out into the bore by the increased flow.
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The gate is mechanically guided over the full stroke.
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In the closed end position, the gate is also mechanically supported.
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A unique transverse seal, consisting of a transverse seal profile and packing compound, makes the body bubble-tight towards the atmosphere.
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The transverse seal can be repacked at any time and under full pressure using the lateral packing screws.
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A mechanically retained round cord seal creates a bubble-tight shut off on the gate edge.
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Robust 4-post topwork for maximum load and a wide variety of actuator types.
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The non-rising stem in the manual actuator saves space and provides good mechanical power transmission.

About MG series by WEY Sistag

Redefining Reliability: The WEY SISTAG MG Series Knife Gate Valve Engineered for Extremes in Turkey

As the official and trusted dealer for WEY SISTAG in Turkey, LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ delivers Swiss-engineered valve solutions that set a new standard for performance in the nation’s most demanding industrial sectors. We bridge the gap between cutting-edge European engineering and the robust needs of Turkish industry, providing not just products but comprehensive flow control partnerships.

The End of Compromise in Critical Flow Control

Across Turkey’s vital industrial landscape—from the demanding mines of Anatolia and the robust pulp & paper plants to essential water treatment and chemical processing facilities—standard knife gate valves often represent a critical operational compromise. While they promise basic functionality, they frequently falter under intense pressure, abrasive slurries, and continuous cycling. The result is predictable: unplanned downtime, spiraling maintenance costs, and persistent bottlenecks that throttle productivity and profitability.

This cycle of compromise ends with a partnership rooted in precision and strength. LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ, as the authorized dealer for the renowned Swiss manufacturer WEY SISTAG, introduces the definitive solution: the MG Series Knife Gate Valve. This valve represents the fusion of unparalleled Swiss precision with unwavering industrial durability. It is a strategic investment in your plant’s process integrity, operational safety, and long-term reliability.

The MG Series: The Reinforced Industry Standard

Conventional knife gate valves, even those built to common standards, typically face limitations in pressure rating. The WEY SISTAG MG Series obliterates these boundaries. Engineered to withstand significantly higher pressures within an identical compact envelope, it delivers superior performance without requiring additional space or complicated piping redesigns. WEY SISTAG has preserved its legendary core design principles while integrating next-generation enhancements, resulting in the most robust and reliable valve in its category.

Unmatched Engineering for Zero-Compromise Operation

The superiority of the MG Series is defined by patented innovations designed to eliminate common failure points and ensure uninterrupted operation.

Superior Flow Dynamics & Self-Cleaning Design

The valve’s optimized gate geometry actively forces accumulated media out of the gate guide and back into the main flow bore during operation. This self-cleaning action, combined with a full-port body bore, drastically minimizes pressure drop and prevents clogging—a transformative feature for abrasive slurries, viscous stock, and fibrous sludges.

Unshakeable Mechanical Integrity & Alignment

To combat stem wear and gate misalignment—primary causes of valve failure—the MG Series features a gate that is mechanically guided throughout its entire stroke. This innovative design eradicates harmful vibration, dramatically reduces wear, and guarantees perfect, leak-free alignment for millions of cycles.

Guaranteed Bubble-Tight Sealing System

A dual-sealing architecture provides absolute isolation:

  • Atmosphere Seal: A unique, laterally repackable seal ensures the body remains hermetically sealed. It can be serviced under full line pressure, eliminating costly system shutdowns.
  • Shut-Off Seal: A mechanically retained, precision-engineered round cord seal creates a definitive, bubble-tight shut-off directly on the gate edge, securely containing even the most aggressive media.

Heavy-Duty Construction for Maximum Service Life

Durability is anchored by a robust 4-post topwork, engineered for maximum load capacity and seamless compatibility with any actuation method—from manual gearboxes to full pneumatic, hydraulic, and electric automation.

Proven Performance Across Turkey’s Key Industrial Sectors

The WEY SISTAG MG Series is a battle-tested solution for the core industries driving the Turkish economy:

Mining & Mineral Processing

Excels in handling highly abrasive coal dust, mineral concentrates, and tailings slurry, offering exceptional wear resistance that reduces downtime.

Pulp, Paper & Forestry

The ideal choice for high-density pulp stock and corrosive chemical liquors, ensuring smooth flow and reliable shut-off in demanding processes.

Water & Wastewater Treatment

Its clog-resistant design is perfect for managing raw sewage, thickened sludge, and biogas substrates, ensuring reliability in critical municipal infrastructure.

Chemical, Petrochemical & Power Generation

Built to resist corrosive acids, alkalis, and FGD slurries, providing a safe and durable sealing solution in punishing environments.

Food & Beverage Processing

Available with hygienic design finishes and material certifications for handling food-grade products, meeting stringent industry hygiene standards.

Technical Specifications: WEY SISTAG MG Series

Nominal Size (DN): 50 – 800 mm
Pressure Rating: 0 – 16 bar (PN16)
Flange Standards: PN10/16, ANSI Class 150, BS10 Table D/E, AS2129 Table D/E
Face-to-Face: EN 558 Series 20
Body Materials: Ductile Iron (EN-GJS-400-15) or Stainless Steel (1.4408)
Sealing Options: NBR, EPDM, Viton. Hard-chroming available for extreme abrasion.

Your Trusted Partner for WEY SISTAG in Turkey

Choosing LİNDER ENDÜSTRİ DIŞ TİCARET LİMİTED ŞİRKETİ as your source for WEY SISTAG means entering a technical partnership. As the official dealer, we provide:

  • Direct access to genuine WEY SISTAG technology and innovation.
  • Expert engineering support for valve selection, sizing, and application analysis.
  • Comprehensive after-sales service, technical support, and genuine parts supply.
  • Streamlined logistics and customs handling specifically for the Turkish market.

We ensure every valve is perfectly specified and integrated into your system for optimal performance, longevity, and return on investment.

Intensify Your Operational Reliability. Contact LİNDER Today.

Stop compromising on performance. Upgrade your critical processes with Swiss-engineered reliability and the dedicated support of Turkey’s official WEY SISTAG partner.