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Isogate® WS Series

Slurry Knife Gate Valve

The Isogate® WS series slurry knife gate valve is specifically designed for a wide range of tough, abrasive and corrosive applications.

A wafer-style slurry knife gate valve designed for abrasive applications

• Mining
• Power utilities
• Pulp and paper
• Cement
• Sand and gravel
• Coal
• Phosphate
• Soda ash
• Alumina
• Mineral sands

Using materials proven by our extensive experience and installation base in the slurry transport industry, Weir Minerals has developed the Isogate® WS series wafer-style valve to deliver reliability and long term performance. Its unique design provides ease of maintenance and low overall ownership costs, delivering outstanding results. Continuous innovation in material, product design, engineering and manufacturing ensures that the Isogate® knife gate valve range remains at the forefront of valve design.

Bi-directional Double Elastomer Sleeve Design

Only thick elastomer sleeves are in contact with slurry. No metal parts contact the fluid. The gate is located in between thick elastomer sleeves, with full tight shut-off. The elastomer sleeves are easily replaced in the field without disassembling the valve.

Size Range

50mm (2”) to 600mm (24”)

Maximum Working Pressure

• 50mm (2”) through 400mm (16”) - 1034kPa (150psi)
• 450mm (18”) through 600mm (24”) - 700kPa (100psi)

Flanges

50mm (2”) to 600mm (24”): ANSI B16.5 class150#. Other flange options available.

Materials

• Body: Cast ductile iron as standard.
• Gate: 316 stainless steel as standard.
• Other materials such as HASTELLOY C-276 alloy, alloy 2205 are also available.
• Sleeves: Natural rubber as standard. EPDM and other materials are also available.
• Yoke: Carbon steel.

Actuator Options

• Bevel gear
• Pneumatic cylinders
• Hydraulic cylinders
• Handwheel
• Electric motor

Pneumatic Cylinder Valve Dimensions

...specific dimensions not reformatted due to length...

Hydraulic Cylinder Valve Dimensions

...specific dimensions not reformatted due to length...

Handwheel Valve Dimensions

...specific dimensions not reformatted due to length...

Bevel Gear Valve Dimensions

...specific dimensions not reformatted due to length...

Design Features

• Robust construction ensures long service life.
• Two-piece elastomer sleeve design protects flow areas against corrosion.
• Wafer body, narrow pattern minimises space requirement.
• Field replaceable thick elastomer sleeves are easily replaced without disassembling the valve.
• Sleeves incorporate Linatex® rubber technology, with a wide range of elastomer compounds available.
• Bi-directional 100% bubble tight shut-off.
• Packingless design - no gate or stem packing.
• Full port design reduces pressure drop and turbulence, minimising wear.
• Suitable for use in abrasive slurry services with high percentages of solids.
• Open bottom allows for the purging of large solids, and solids in high concentration.
• No seat cavities where solids can collect and cause gate interference.
• Yoke design allows fitting for all designed actuators.
• Flush control option allows for periodic cleaning of the lower discharge vent and allows flushing as needed.

Body Options

Open Bottom: Open bottom allows for the purging of large solids, and solids in higher concentration. The purging of solids stops when the gate is in the full open or closed position.

Flushing Plate: Flushing plate option adds flexibility to the standard open bottom. This option also allows for periodic cleaning of the lower discharge vent and can allow flushing as needed.

Adjustment Free Packingless Upper Seal

The Isogate® WS series heavy duty knife gate valve features an adjustment free packingless upper seal which eliminates the need to constantly tighten the packing to eliminate leakage. The upper seal design features lubrication channels that contain a gate lubricant for smoother gate actuation and increased sleeve life. Fittings are accessible to recharge the upper seal while in service.

* sizes 50mm (2”) through 400mm (16”)

Note: The diagram above features the Linatex® premium rubber sleeve option.

Copyright © 2017, Weir Minerals Australia Ltd. All rights reserved. ISOGATE is a trademark and/or registered trademark of Weir do Brasil Ltda.; LINATEX and the Linatex Red Colour are trademarks and/or registered trademarks of Linatex Limited; WEIR and the WEIR logo are trademarks and/or registered trademarks of Weir Engineering Services Ltd. Certain features of the technology featured in this publication may be protected by pending and granted patents in the name of The Weir Group PLC and/or one of its subsidiaries. HASTELLOY is not a trademark of any company forming part of The Weir Group PLC. WMD0188/201703