Email:
[email protected]
Phone:
+91 93135 43530
Address:
133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
Lined Butterfly Valve supplier in Ahmedabad, Gujarat. PTFE lined (chemical service — acids, alkalis, solvents) and Rubber lined (EPDM / NBR / NR / Neoprene — water, ETP, slurry, abrasion service) — Cast Iron (CI) and Ductile Iron (DI) body…
Lined Butterfly Valve Supplier India | PTFE Lined & Rubber Lined | CI DI Body | SS304 SS316 Disc | DN50–DN1200 | PN10 PN16 | KELOR
Price on Request
About Company
- KRISHNA INDUSTRIES
- GST No. : 24AKLPP6499B1ZT
- Ahmedabad, Gujarat, India
- Manufacturer, Traders & Wholesale Supplier
- Year of Establishment : Since 1985
- Annual Turnover : Below Rs. 25 Crore Approx.
- Banker : APANI SAHAKARI BANK LIMITED
- Company CEO : Ruchin Panchal
- Constitution of Business : Proprietorship
- Leading Valve Supplier in India covering Maharashtra, Gujarat, Tamil Nadu, Karnataka, Telangana, Delhi NCR, West Bengal, Rajasthan, Madhya Pradesh, Uttar Pradesh, Punjab, Haryana, Andhra Pradesh, Odisha, Chhattisgarh, Jharkhand, Bihar, Kerala, Assam.
- Major Industrial Supply Cities: Ahmedabad, Vadodara, Rajkot, Surat, Mumbai, Pune, Thane, Nashik, Nagpur, Chennai, Coimbatore, Bengaluru, Hyderabad, Delhi, Noida, Gurugram, Faridabad, Kolkata, Jaipur, Indore, Bhopal, Lucknow, Kanpur, Ludhiana, Visakhapatnam.
Description
Lined Butterfly Valve Supplier India | PTFE Lined & Rubber Lined | CI / DI Body | SS304 / SS316 Disc | Lever / Gear / Pneumatic / Electric | DN50–DN1200 | PN10–PN16 | KELOR
Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Body: CI / DI | Disc: SS304 / SS316
Lining: PTFE / EPDM / NBR / NR / Neoprene | Sizes: DN50–DN1200
Lined Butterfly Valve Supplier in India
Krishna Industries (KELOR), based in Ahmedabad, Gujarat, is a B2B supplier of Lined Butterfly Valves — PTFE lined (for chemical, acid, alkali, and pharmaceutical service) and Rubber lined (EPDM / NBR / NR Natural Rubber / Neoprene — for water, ETP/STP, slurry, abrasion, and ozone service) — Cast Iron (CI IS 210) and Ductile Iron (DI ASTM A536) body — SS304 (CF8) and SS316 (CF8M) disc — lever operated / gear operated / pneumatic actuated (spring return or double acting) / electric actuated — wafer type and lug type — DN50 to DN1200 — PN10 / PN16 — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.
A lined butterfly valve places a chemically resistant barrier — PTFE or rubber — between the process fluid and the metal body, eliminating internal body corrosion in aggressive media. Where an unlined cast iron butterfly valve corrodes internally in acid, salt water, alkaline effluent, or abrasive slurry, a lined butterfly valve extends service life to 10–15 years in the same conditions, with seat and disc replacement as the only routine maintenance item.
PTFE Lined vs Rubber Lined — Selection Guide
The lining material is the first and most important specification decision for a lined butterfly valve. PTFE and rubber each have conditions where they outperform the other — specifying incorrectly shortens valve life significantly.
| Selection Factor | PTFE Lined | Rubber Lined (EPDM / NBR / NR / Neoprene) |
|---|---|---|
| Chemical Resistance | ✅ Near-universal — concentrated acids (H₂SO₄, HCl, HNO₃), concentrated alkalis (NaOH), solvents, oxidising agents, halogens — PTFE resists virtually all chemicals at standard process conditions | Media-specific — must select correct rubber grade — EPDM: water, steam, mild acid/alkali, ozone — NBR: oil and petroleum — NR: water-based slurry — Neoprene: ozone, weathering, mild chemical — no single rubber grade covers all chemical service |
| Abrasion Resistance | ❌ PTFE is chemically inert but relatively soft — abrasive particles (sand, grit, mineral fines) in high velocity slurry erode PTFE lining — not recommended for abrasive slurry service | ✅ Natural Rubber (NR) lining — high resilience — absorbs impact of abrasive particles elastically — bounces back — significantly better abrasion resistance than PTFE in slurry service — specify NR for mining, dredging, mineral slurry |
| Temperature Range | ✅ -40°C to +180°C — suitable for hot chemical service, steam-traced lines, elevated temperature process | -10°C to +120°C (EPDM) — suitable for ambient to moderate temperature — NOT for high temperature steam or hot chemical service above 120°C |
| Pressure Rating | PN10 / PN16 standard — PN25 on request | PN10 / PN16 standard |
| Cost | Higher — PTFE material and moulding cost — justified for chemical service where rubber is chemically attacked | ✅ Lower — economical for water, ETP, slurry service where chemical resistance of PTFE is not required |
| Primary Indian Applications | Chemical plants (Ankleshwar, Vapi, Dahej), pharma API plants, acid/alkali handling, chlorination systems, solvent transfer lines, aggressive industrial effluent | ✅ Municipal water supply, ETP/STP sludge and effluent, cooling water systems, mining slurry, dredging, irrigation, industrial cooling towers, general utility corrosive service |
| Specify When | Chemical resistance is the primary requirement — media is a concentrated acid, alkali, solvent, or oxidising agent — or media attacks rubber (check rubber chemical resistance chart for specific media) | ✅ Media is water-based, mildly corrosive, or abrasive slurry — cost is a factor — temperature is below 120°C — select rubber grade by media type |
Rubber Grade Selection — Rubber Lined Butterfly Valve
| Rubber Grade | Specify For | Not Suitable For |
|---|---|---|
| EPDM (Ethylene Propylene Diene Monomer) |
✅ Water supply, municipal ETP/STP, mild acid and alkali (dilute), steam, ozone, outdoor weathering — most widely used liner for Indian water and wastewater service — excellent ozone and UV resistance for outdoor installations | Petroleum products, oils, fuels, hydrocarbon solvents — EPDM swells in oil service — specify NBR instead |
| NBR (Nitrile Butadiene Rubber) |
✅ Oil-contaminated water, petroleum product transfer, fuel handling, oil field produced water — best oil resistance of standard rubber grades — refineries, petrochemical, fuel terminal service | Ozone, weathering, dilute acid/alkali — NBR degrades in ozone and UV exposure — specify EPDM or Neoprene for outdoor or ozone service |
| NR (Natural Rubber) |
✅ Abrasive slurry — mining tailings, mineral concentrate slurry, sand slurry, dredging — NR has highest resilience and abrasion resistance of standard rubber grades — absorbs and recovers from abrasive particle impact — slurry pumping systems, dredge pipeline isolation | Oil service (NR attacked by hydrocarbons), ozone (NR degrades in ozone), elevated temperature above 70°C |
| Neoprene / CR (Chloroprene Rubber) |
Outdoor service with ozone and weathering exposure — marine environment — mild acid/alkali — moderate oil resistance (better than EPDM, less than NBR) — cooling tower butterfly valves in outdoor installations — coastal and marine industrial service | Concentrated acids, ketones, aromatic solvents — specify PTFE lined for these media |
Body and Disc Material Selection
| Body Material | Specify For |
|---|---|
| Cast Iron (CI) IS 210 Grade FG260 |
✅ Standard specification for most Indian lined butterfly valve applications — DN50 to DN600 — PN10/PN16 — economical — widely specified in Indian ETP/STP, water supply, chemical plant, and utility projects — sufficient mechanical strength for standard process conditions |
| Ductile Iron (DI) ASTM A536 Gr 65-45-12 |
✅ Higher mechanical strength and impact resistance than CI — specify for DN300 and above where higher structural loads apply — mining and slurry service where external mechanical loads from pipe stress are higher — government water supply and municipal projects specifying DI body per IS 1538 |
| Disc Material | Specify For |
|---|---|
| SS304 (CF8) ASTM A351 CF8 |
Standard — non-corrosive to mildly corrosive media — water, EPDM-lined water service, dilute chemical — economical SS disc — disc contacts the fluid in both lined types (disc is SS, not lined) |
| SS316 (CF8M) ASTM A351 CF8M |
✅ Corrosive chemical service — PTFE lined chemical valves where disc contacts aggressive media — pharma GMP lines — chloride-rich water — specify SS316 disc with PTFE lined body for full corrosion resistance package in aggressive chemical service |
Lined Butterfly Valve Range — Krishna Industries (KELOR)
- PTFE Lined Butterfly Valve — full PTFE body liner, PTFE disc, PTFE seat — CI / DI body — SS316 disc — lever / gear / pneumatic / electric — DN50–DN600 — PN10/PN16 — chemical plant, pharma, acid/alkali handling, solvent service — detailed specifications, chemical resistance table, and full technical content on product page
- Rubber Lined Butterfly Valve — EPDM / NBR / NR Natural Rubber / Neoprene liner and seat — CI / DI body — SS304 / SS316 disc — lever / gear / pneumatic / electric — wafer and lug type — DN50–DN1200 — PN10/PN16 — water supply, ETP/STP, slurry, mining, cooling water, irrigation — detailed specifications and rubber grade selection on product page
Related Products — Krishna Industries (KELOR)
- Concentric Disc Rubber Lined BFV — Lug Type — lug body for dead-end service and line sectioning — rubber lined — wastewater, water supply
- SS Butterfly Valve — SS304 / SS316 body — for corrosive service where SS body (not lined CI) is specified — pharma, food, chemical plant
- Gear Operated Butterfly Valve — worm gear operator for DN200+ — manual large bore operation
- Single Plate Wafer Check Valve — install on pump discharge downstream of lined butterfly isolation valve — prevents backflow when pump trips
Frequently Asked Questions
1. Why use a lined butterfly valve instead of an SS butterfly valve for chemical service?
A PTFE lined butterfly valve provides better chemical resistance than SS316 for many aggressive chemicals — concentrated hydrochloric acid, concentrated sulphuric acid, and many halogenated solvents attack SS316 but do not attack PTFE. The lined valve also costs significantly less than a full SS316 body valve at larger bore sizes — the CI or DI body provides structural strength and the PTFE lining provides chemical resistance, giving the performance of a PTFE valve at a fraction of the cost of an all-PTFE or all-SS construction. Specify SS316 body butterfly valve where temperature or pressure conditions exceed the PTFE liner rating, or where the process engineer specifically requires a metallic body construction.
2. Can a rubber lined butterfly valve handle mining slurry?
Yes — specify Natural Rubber (NR) lining for abrasive mining slurry service. NR has significantly higher resilience than PTFE — abrasive particles impact the rubber lining and the rubber deforms elastically and recovers, rather than being cut. In mineral tailings slurry, iron ore slurry, or sand slurry service, an NR lined butterfly valve outperforms a PTFE lined valve in abrasion resistance. For chemical mining slurry where both abrasion and chemical attack are present — acidic mineral slurry — evaluate both lining types against the specific chemistry and select accordingly. PTFE is more chemically resistant; NR is more abrasion resistant — the dominant failure mode determines the correct specification.
3. What is the difference between wafer type and lug type lined butterfly valve?
A wafer type lined butterfly valve is clamped between two pipeline flanges using through-bolts — it has no integral flange lugs. It is compact, economical, and correct for most lined butterfly valve applications in continuous piping where both upstream and downstream flanges are present. A lug type lined butterfly valve has threaded lugs on the body that allow it to be bolted independently to each pipeline flange — the upstream and downstream flange bolts are separate. This allows the downstream piping to be removed while the valve remains in service, making lug type correct for dead-end service (where the valve is at the end of a pipeline) and for systems where downstream piping must be dismantled for maintenance without isolating the upstream side.
4. What is the temperature limit of rubber lined butterfly valves?
EPDM rubber lined butterfly valves are rated to approximately 120°C continuous service — suitable for hot water, low pressure steam condensate, and moderate temperature chemical service. NBR is rated to approximately 100°C. NR to approximately 70°C. Neoprene to approximately 100°C. For service above 120°C — hot chemical, steam-traced lines, high temperature process — specify PTFE lined butterfly valve which is rated to 180°C. Above 180°C, specify a metallic seated butterfly valve (triple eccentric or high performance) — lined valves are not suitable for very high temperature service.
5. What is the MOQ?
MOQ is 10 Nos. Project orders — 20 to 500+ Nos across sizes, lining types, and operators — with dimensional report, test certificate, and GST invoice. For pneumatic actuated orders: actuator sizing, spring return direction (FTC/FTO), solenoid voltage, and limit switch wiring diagram supplied. WhatsApp lining type (PTFE / rubber grade), body material, disc material, size, pressure class, operator type, and quantity for project pricing within 2 hours.
Conclusion
Krishna Industries (KELOR) supplies Lined Butterfly Valves for corrosive chemical, water, slurry, and abrasive fluid isolation — PTFE lined (near-universal chemical resistance, -40°C to +180°C, chemical plant and pharma standard) and Rubber lined (EPDM / NBR / NR / Neoprene — water supply, ETP/STP, slurry, mining, cooling water service) — Cast Iron (CI) and Ductile Iron (DI) body — SS304 (CF8) and SS316 (CF8M) disc — lever / gear / pneumatic actuated (spring return or double acting) / electric actuated — wafer and lug type — DN50 to DN1200 — PN10 / PN16. GST invoice, Pan India dispatch from Ahmedabad. WhatsApp lining type, size, and quantity for project pricing within 2 hours.
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