Larox Heavy Duty Wafer Knife Gate Valve is built with a cast body and features a heavy-duty stainless steel blade. Removable seats on either side of the gate provide a bi-directional bubble tight seal, with no metal parts in contact with the slurry. LKW is available with pressure rating up to 10 bars
Features
- Double seat design for heavy duty slurry service.
- Easily replaceable ring sleeves.
- Full bore.
- When open, the knife-gate is fully withdrawn from the slurry flow.
- No metal parts in contact with the flowing slurry.
- Bubble tight shutoff.
- No clogged bonnet to impede flow.
- External epoxy coated.
- Easily adapted to suit most actuators
- Low maintenance requirements.
- Suitable for wet or dry service.
- Bi-directional flow.
- No packing gland to maintain.
- Wide range for elastomer available.
- No seat cavity where solids can collect and prevent full gate closure.
Product Specification
Body:
Wafer pattern SG Iron as standard.
Elastomer Sleeves:
NR, (Standard) Nitrile, others on request
Pressure Rating:
10 Bar, standard (150psi)
Diameter:
50-600 mm
Gate Material:
316 Stainless Steel with optional wear coatings. Various blade materials optional.
Stem protection as standard
Drilling patterns:
DN50 to DN600 drilled and Tapped DIN, ANSI.
Other in request.
Flushing port as standard
Material Certification:
Certified chemical and physical test reports can be supplied
How the rubber ring sleeves work
Matching rubber ring sleeves are placed in the valve housing to seal against the gate when the valve is closed and seal against each other when the valve is open. This tight seal contains the high internal line pressure. Double seated design provides bi-directional flow and tight shut off.
Secondary Seal
The field replaceable elastomer secondary seal replaces conventional gland packing, providing both wiping and lubricating actions to the blade as it strokes - via contact between the blade surface and the silicone grease filled contours of the seal itself. Lubrication of the blade allows for easier actuation and movement. There is no need to remove the valve from the line when replacing the secondary seal.
Dimension and weights
Click picture to enlarge it
Dimensions are for guidance only - detailed dimensions drawings available on request. All dimensions are in millimeters, unless stated.
