Teflon Lined Butterfly Valve | PTFE Seat | CI & WCB Body | SS316 Disc | Class 150 | Chemical Plant Supplier India

Description

Teflon Lined Butterfly Valve Supplier India | PTFE Seat SS316 Disc | CI & WCB Body | PN10–Class 300 | API 609 | Chemical Plant | KELOR

Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Body: CI (PN10/PN16) / WCB (Class 150 / Class 300)
Standard: EN 593 / API 609 | Sizes: DN50–DN600

Teflon Lined Butterfly Valve Supplier in India

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, is a B2B supplier of Teflon Lined Butterfly Valves — Cast Iron (CI) and WCB cast carbon steel body — PTFE (Teflon) seat liner — SS316 disc — wafer and lug type — PN10, PN16, Class 150, Class 300 — DN50 to DN600 — lever, gear, pneumatic, and electric actuated — EN 593 / API 609 — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

“Teflon lined butterfly valve” is the trade term for a metal-body butterfly valve with a PTFE (polytetrafluoroethylene) seat liner — Teflon being DuPont’s brand name for PTFE. The PTFE seat liner provides chemical resistance at the disc-to-seat sealing interface, making the valve suitable for corrosive chemical, acid, alkali, solvent, and aggressive media service where a standard rubber-seated butterfly valve would be chemically attacked. The key specification decision for Indian chemical plant buyers is body material — CI (cast iron) for standard PN10/PN16 utility and moderate chemical service, or WCB (cast carbon steel) for process plant piping where CI body is excluded by project specification, higher pressure Class 150/300 is required, or ASME B31.3 compliance is needed.

CI Body vs WCB Body — Why It Matters for Chemical Plants

Rule for Indian chemical plant buyers: If your project specification or piping class document says “CS body” or “carbon steel body” — specify WCB. If it says “CI acceptable” or the service is non-hazardous utility — CI is the more economical choice. When in doubt on a process line, specify WCB.

PTFE Seat vs EPDM/NBR Seat — When to Specify Teflon Lined

Technical Specifications

Chemical Compatibility — PTFE Seat

Applications in Indian Industries

• Gujarat chemical belt (Ankleshwar, Vapi, Dahej, Bharuch) — WCB Class 150 PTFE SS316 — acid transfer lines, chemical reactor feed and discharge, neutralisation systems, chemical plant process piping — ASME B31.3 compliant, CS body accepted by EPC piping specs
• Petrochemical and refinery utilities — WCB Class 150 PTFE — utility chemical dosing, effluent treatment plant feed, cooling water chemical injection — where CI excluded by process piping class
• Pharmaceutical plants — CI or WCB PTFE SS316 — chemical dosing, solvent recovery ETP, process chemical distribution — FDA compliant PTFE seat
• Chlor-alkali plants — WCB PTFE SS316 — chlorine, caustic soda, hydrochloric acid lines — PTFE handles all three media
• Fertiliser plants — WCB Class 150 PTFE — phosphoric acid, sulphuric acid, ammonia utility lines
• Water treatment and chlorination — CI PN16 PTFE — chlorine dosing lines, hypochlorite distribution — PTFE preferred over EPDM for chlorine service
• Food and beverage processing — CI or SS316 body PTFE — CIP acid and alkali lines, process chemical dosing — FDA compliant PTFE, no contamination risk
• ETP and STP chemical dosing — CI PN16 PTFE — ferric chloride, polymer, acid/alkali pH correction dosing lines
• Textile and dyeing (Surat, Ahmedabad) — CI PN10/PN16 PTFE — dye chemical lines, bleaching agent distribution, acid/alkali treatment

Related Products — Krishna Industries (KELOR)

• PTFE Muffler Butterfly Valve — CI body PN10/PN16 PTFE seat — for general utility and moderate chemical service where WCB body is not required — more economical option
• Gear Operated Butterfly Valve — for DN200 and above where lever torque is excessive
• PP Flanged Diaphragm Valve — non-metallic alternative for highly corrosive chemical service where metal body is attacked
• PN16 Butterfly Valve — CI body EPDM seat for non-chemical PN16 service at lower cost

Frequently Asked Questions

1. What is the difference between “Teflon lined” and “PTFE seat” butterfly valve?

They describe the same construction — PTFE (Teflon) seat liner pressed or bonded into the metal body bore. “Teflon” is DuPont’s registered brand name for PTFE (polytetrafluoroethylene). Both terms refer to a metal-body butterfly valve where the seat sealing surface is PTFE rather than rubber (EPDM or NBR). The disc is stainless steel — it contacts the PTFE seat on closing — the PTFE provides chemical resistance at the sealing interface.

2. Why specify WCB body instead of CI for a chemical plant?

Three reasons. First, ASME B31.3 process piping code and most petrochemical EPC piping specifications exclude cast iron for flammable, toxic, and high-pressure process service — WCB is the minimum acceptable body material. Second, WCB Class 150 provides a higher pressure rating (20 bar at 38°C) than CI PN16 (16 bar). Third, WCB is ductile — it handles mechanical shock and pipeline vibration without cracking. CI is brittle and can fail suddenly under shock loading in process plant environments.

3. What is the maximum temperature for PTFE seat butterfly valve?

PTFE itself is rated to over 200°C, but the seat liner is bonded or pressed into a metal body — differential thermal expansion between PTFE and the metal body limits the practical service temperature. On CI body, maximum recommended service temperature for the PTFE seat is 150°C. On WCB body, 180°C. Above these temperatures, the PTFE liner can debond from the body, causing seat leakage. For steam service above 150°C, specify a metal-seated high-performance butterfly valve instead.

4. Is PTFE disc available instead of SS316 disc?

A fully PTFE-encapsulated disc (SS316 core with PTFE jacket) is available on request for highly aggressive chemical service where SS316 disc is also attacked by the media — concentrated oxidising acids, HF, and certain aggressive solvents. Specify “PTFE encapsulated disc” in your RFQ. Standard supply is SS316 bare disc with PTFE seat liner.

5. API 609 or EN 593 — which standard for my project?

EN 593 is referenced in most Indian private sector EPC project specifications for butterfly valves — default for European and Indian EPC companies. API 609 is required for petrochemical, refinery, and oil and gas projects following American standards — typically US-origin EPC companies or projects with American licensor specifications. Both standards cover resilient-seated butterfly valves — confirm which is required by your project piping specification before ordering.

6. What is the MOQ?

MOQ is 10 Nos. Project orders for chemical plant, ETP, or process piping — 20 to 200+ Nos across sizes — with project pricing, hydro test reports, MTR, and API 598 test certificates. WhatsApp your size list, body material (CI or WCB), pressure class, and quantity for bulk pricing within 2 hours.

Conclusion

The Teflon Lined Butterfly Valve supplied by Krishna Industries (KELOR) is the correct PTFE-seated butterfly valve for Indian chemical plant, petrochemical, process piping, pharmaceutical, ETP, and aggressive chemical service — CI body (PN10/PN16) and WCB body (Class 150 / Class 300) — PTFE seat liner — SS316 disc — wafer and lug type — DN50 to DN600 — lever, gear, pneumatic, and electric actuated — EN 593 / API 609 — API 598 tested — WCB body for ASME B31.3 process piping compliance and higher pressure Class 150/300 service. GST invoice, Pan India dispatch from Ahmedabad. WhatsApp body material, pressure class, size, and quantity for project pricing within 2 hours.