Knife Gate Valve Supplier India | CI DI WCB SS316 | Manual Pneumatic Electric | DN50–DN600 | Slurry Pulp Wastewater | KELOR

Description

Knife Gate Valve Supplier India | CI / DI / WCB / SS304 / SS316 | Manual / Pneumatic / Electric | DN50–DN600 | PN10–PN16 | Slurry, Pulp, Wastewater, Mining | KELOR

Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Body: CI / DI / WCB / SS304 / SS316
Operator: Manual / Pneumatic / Electric | Sizes: DN50–DN600

Knife Gate Valve Supplier in India

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, is a B2B supplier of Knife Gate Valves — Cast Iron (CI), Ductile Iron (DI), WCB (carbon steel), SS304 (CF8), and SS316 (CF8M) body — SS316 knife-edge gate — EPDM / NBR / PTFE / metal-to-metal seat — wiper seals — rising and non-rising stem — manual handwheel / gear operated / pneumatic actuated / electric actuated — wafer type and flanged — DN50 to DN600 — PN10 / PN16 — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

Knife gate valves are the correct isolation valve for slurry, fibrous pulp, paper stock, sludge, fly ash, mineral tailings, sewage, and any solid-laden fluid where conventional gate valves jam and butterfly valves erode prematurely. The thin flat knife-edge gate slides cleanly through the flow path, cutting through fibrous media and clearing solids from the seat line on every operation — a mechanism specifically designed for the conditions that destroy other valve types.

Why Knife Gate Valve — Not Butterfly Valve or Gate Valve — for Slurry Service

Body Material Selection Guide

→ For WCB body knife gate valves: WCB Knife Gate Valve — detailed specifications
→ For SS304/SS316 body knife gate valves: SS Knife Edge Gate Valve — detailed specifications

Operator Selection Guide

Technical Specifications

Applications in Indian Industries

• ETP and STP — wastewater treatment — CI or DI wafer type PN10/PN16 DN80–DN300 — sludge line isolation, raw sewage inlet isolation, dewatering press feed isolation, scum chamber isolation — manual for maintenance isolation, pneumatic spring return for automated sludge discharge cycles — CI body economical for near-neutral pH municipal sewage — SS316 for industrial ETP with acidic or chemical waste
• Mining and mineral processing — DI or WCB DN150–DN400 — mineral tailings slurry, iron ore slurry, coal slurry discharge, thickener underflow isolation — high abrasive particle loading — DI body with Hardox gate for severe abrasion — gear operated for large bore — pneumatic actuated for automated thickener discharge control
• Power plant ash handling — WCB or DI DN200–DN600 — bottom ash sluicing lines, fly ash slurry discharge, HDPE-lined ash pond feed lines — large bore gear operated or electric actuated — non-rising stem for low headroom installation in underground pump sumps
• Pulp and paper — paper mills — SS316 DN100–DN300 — pulp stock lines, broke chest outlets, white water lines, black liquor (with appropriate body material for liquor chemistry) — knife-edge cuts through fibrous pulp and rags — pneumatic actuated for automated machine chest level control
• Cement plants — WCB DN150–DN400 — cement slurry, fly ash, raw meal slurry in wet process — abrasion-resistant gate with wiper seals — gear operated for large bore — wear on gate is the primary maintenance item — replaceable gate without removing valve from line
• Sugar mills — Uttar Pradesh, Maharashtra — WCB or SS316 DN100–DN300 — juice line isolation, molasses transfer, bagasse slurry — seasonal operation with cleaning and maintenance between crushing seasons — replaceable seat design allows annual seat replacement during off-season maintenance

Knife Gate Valve Range — Krishna Industries (KELOR)

• WCB Knife Gate Valve — ASTM A216 WCB body — SS316 gate — EPDM/NBR/PTFE seat — manual handwheel — DN50–DN600 — PN16 — industrial process slurry, power plant, cement, sugar, pulp and paper
• SS Knife Edge Gate Valve — SS304 / SS316 — CF8 / CF8M body — SS316 gate — EPDM/PTFE seat — manual or actuated — DN50–DN300 — PN16 — corrosive slurry, chemical plant, pharma, food processing

Related Products — Krishna Industries (KELOR)

• Dual Plate Check Valve — for slurry pump discharge NRV — low cracking pressure, spring-assisted — wafer type CI/WCB/CF8M — prevents backflow in slurry pump lines when pump trips
• Y Strainer — install upstream of knife gate valve on process pump suction — removes oversized particles that could damage gate and seat
• Pneumatic Ball Valve — for clean fluid automated isolation where knife gate is not required
• WCB Globe Valve — for throttling service in process lines — knife gate valve is NOT suitable for throttling
• Cast Iron Gate Valve — for clean water isolation where slurry service is not a concern and conventional gate valve is specified

Frequently Asked Questions

1. Can a knife gate valve be used for throttling?

No — knife gate valves are on/off isolation valves only. In the partially open position, the high-velocity slurry flow passes through the narrow opening at the gate edge and causes rapid erosion of the gate, seat, and body in that zone — the valve fails quickly in throttling service. For flow control in slurry systems, use a pinch valve or an adjustable orifice device designed for throttling in solid-laden service. Knife gate valves must be operated fully open or fully closed.

2. What is the difference between wafer type and flanged knife gate valve?

A wafer type knife gate valve has no integral flanges — it is clamped between two pipeline flanges using through-bolts, with gaskets on both faces. It is compact (short face-to-face), economical, and correct for most new installation applications. A flanged knife gate valve has integral flanges that bolt directly to the pipeline flanges — it is easier to install and remove without disturbing the piping, which is important for valves that require frequent removal for maintenance or gate replacement. For large bore DN300+ in high maintenance applications like mineral processing, flanged type is often preferred despite the higher cost.

3. When should I specify pneumatic spring return versus double acting?

Spring return (fail-safe) should be specified whenever the safe condition of the process requires the valve to automatically move to a defined position on instrument air failure. For example: an ETP overflow protection knife gate valve should be fail-safe closed — if air fails, valve closes and prevents overflow discharge. A sludge discharge valve on an automated dewatering press should be fail-safe closed — if air fails, process stops rather than running uncontrolled. Double acting (requires air to both open and close) is correct for non-critical process automation where air failure position is not a safety requirement — the valve simply stays in last position on air failure.

4. What causes knife gate valves to fail in slurry service and how is it prevented?

The primary failure modes in slurry service are gate erosion (abrasive particles eroding the gate surface), seat erosion (abrasive particles cutting the elastomer seat during closure), and packing leakage (slurry migrating up the stem past the packing gland). Gate erosion is managed by specifying SS316 gate (standard), hardened steel gate, or Hardox-faced gate for severe abrasion. Seat erosion is managed by specifying the correct elastomer (EPDM for water-based slurry, NBR for oil-contaminated, PTFE for chemical) and replacing the seat during planned maintenance — replaceable seats allow gate maintenance without removing the valve body from the pipeline. Packing leakage is managed by periodic gland tightening and repacking during shutdown.

5. What is the MOQ?

MOQ is 10 Nos. Slurry system project orders — 20 to 200+ Nos across sizes and body materials — with dimensional report, shell and seat test report, MTC on request, and GST invoice. For pneumatic actuated orders: actuator sizing calculation, spring return direction (FTC/FTO), solenoid voltage, and limit switch wiring diagram supplied. WhatsApp body material, gate material, seat material, size list, pressure class, operator type, and quantity for project pricing within 2 hours.

Conclusion

Krishna Industries (KELOR) supplies Knife Gate Valves for slurry, fibrous pulp, paper stock, sludge, fly ash, mineral tailings, sewage, and solid-laden fluid isolation — Cast Iron (CI), Ductile Iron (DI), WCB, SS304 (CF8), SS316 (CF8M) body — SS316 knife-edge gate — EPDM / NBR / PTFE / metal-to-metal seat — wiper seals — rising and non-rising stem — manual handwheel / gear / pneumatic actuated (spring return FTC/FTO or double acting) / electric actuated — wafer type and flanged — DN50 to DN600 — PN10 / PN16. GST invoice, Pan India dispatch from Ahmedabad. WhatsApp full specification and size list for project pricing within 2 hours.