Plug Valves
Compact quarter-turn shut-off for process lines.
Explore Plug ValvesSolids / Slurry valve range SIYA supply & sourcing
Knife Gate Valves
Slim-profile isolation for slurry and solids.
Slim-profile isolation valves for slurry, pulp, powder, effluent and solids-handling services where a sharp blade cuts through the media.
Supplied through selected market sources. Manufacturer and model are confirmed in the quotation; SIYA is not represented as the manufacturer.
Overview
Understanding the knife gate valve
A knife gate valve drives a thin blade through the flow to cut and seal against fibrous, viscous or solids-laden media that would block a standard gate valve.
Resilient-seated versions give bubble-tight shut-off; metal-seated versions suit abrasive or hot service. The slim body saves space and weight in tight pipework.
Construction options
Common knife gate valves designs
These are general valve-family descriptions, not a statement that every configuration is available. The selected supplier and design are confirmed for each quotation.
| Design | Description | Typical context |
|---|---|---|
| Wafer | Compact body fitting between flanges | Tight pipework, general slurry |
| Lug / double-flanged | Threaded lugs for end-of-line and maintenance | Dead-end service, heavy duty |
| Resilient-seated | Elastomer seat for tight shut-off | Wastewater, pulp, mild slurry |
| Metal-seated | Hardened seat for abrasion and temperature | Mining, ash, cement |
| Bonnetless | No packing gland; reduces leakage risk with solids | Powder, bulk handling |
Technical selection
Specifications confirmed to order
No model-specific size, pressure, temperature, materials, certificates or standards are guaranteed by this page. The exact specification is checked against the selected supplier's datasheet and confirmed in writing before supply.
- Size, pressure & temperature
- Confirm operating conditions and design envelope for the selected model.
- Body, trim & soft parts
- Match the process fluid, temperature and compatibility requirements.
- Ends & installation
- Specify connection type, facing, drilling and applicable piping standard.
- Operation & accessories
- Confirm manual or actuated operation, control signal and accessories.
- Standards & testing
- Confirm the applicable design, inspection and test requirements for the order.
- Documents & traceability
- State certificate and documentation requirements in the enquiry.
Please do not select a valve from a general web description alone. SIYA will confirm the offered make, model, datasheet and deviations with the quotation.
Where they are used
Typical applications
- Pulp, paper and textile effluent
- Mining and mineral processing
- Cement and ash handling
- Wastewater and sludge
- Sugar, food and starch
- Powder and bulk-solids handling
Selection checklist
What to specify
- Medium and solids content
- Seat: resilient or metal
- Body style and flange standard
- Pressure and temperature
- Bi-directional shut-off requirement
- Handwheel or actuator
Need a valve for a specific duty?
Send the details you have. We’ll help confirm the right specification.
Include service conditions, quantity and delivery location. A datasheet, BOQ or valve photo is also helpful.