Cast Iron Disc Butterfly Valve Supplier India | CI Body CI Disc | NBR EPDM PTFE Seat | Wafer Lug | PN10 PN16 | DN50–DN300 | Lever Gear Operated | KELOR

Description

Cast Iron Disc Butterfly Valve Supplier India | CI Body / DI Body | CI Disc | NBR / EPDM / PTFE Seat | Wafer & Lug | PN10 / PN16 | DN50–DN300 | Lever & Gear Operated | KELOR

Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Body: CI IS 210 / DI ASTM A536 | Disc: Cast Iron
Seat: NBR / EPDM / PTFE | Sizes: DN50–DN300 | Pressure: PN10 / PN16

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Cast Iron Disc Butterfly Valve Supplier in India

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, supplies Cast Iron Disc Butterfly Valves — CI body (IS 210 FG260) and DI body (ASTM A536) — Cast Iron disc — NBR / EPDM / PTFE seat — wafer type (standard) and lug type — PN10 / PN16 — lever operated (DN50–DN150) and gear operated with handwheel (DN150–DN300) — DN50 (2″) to DN300 (12″) — API 598 tested — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

A Cast Iron disc butterfly valve is the most economical butterfly valve for non-corrosive water service — raw water, sewage, cooling tower water, irrigation, fire fighting, and infrastructure utility piping. Furthermore, CI disc is significantly lower cost than SS304 or SS316 disc at large bore DN200–DN300 — the saving is most significant at DN225 and DN300 where the cost difference between CI and SS disc is substantial on bulk project orders. Consequently, CI disc butterfly valve is the standard specification for Indian civil, infrastructure, and municipal water projects where corrosion resistance of SS disc is not required.

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CI Disc vs SS Disc — Which to Specify

The disc material is the most important cost and performance decision on a butterfly valve order. Moreover, it determines both the price and the application suitability of the valve. Specifying SS disc where CI disc is adequate wastes project budget. Specifying CI disc where SS disc is required causes premature corrosion and contamination.

Factor	Cast Iron Disc (This Page)	SS304 Disc	SS316 Disc
Material	Grey cast iron IS 210 — same material family as body — economical	SS304 CF8 — austenitic stainless steel — corrosion resistant	SS316 CF8M — SS304 + 2–3% Mo — chloride resistant
Corrosion Resistance in Water	Adequate for non-corrosive raw water, sewage, cooling water — corrodes in chemically treated water, seawater, DM water	✅ Good — resists standard water, mild chemical — not for chloride-rich water	✅ Excellent — resists chloride, seawater, treated cooling water with biocide
Iron Contamination Risk	Iron leaches into fluid — acceptable for raw water and sewage — NOT for potable water (taste/colour), DM water (contamination), pharma/food	✅ No iron contamination — suitable for potable water and DM water	✅ No iron contamination
Cost (Relative)	✅ Lowest — most economical — significant saving at DN200–DN300 on large infrastructure projects	Medium — SS material premium over CI	Highest — SS316 Mo premium over SS304
Specify For	✅ Raw water intake, raw sewage and wastewater ETP/STP, fire fighting (non-potable), irrigation, cooling tower open circuit non-treated, storm water, infrastructure utility — anywhere fluid is non-corrosive and iron contamination is acceptable	✅ HVAC chilled and hot water, potable water supply, DM water, mildly treated cooling water — where iron contamination is not acceptable	✅ Chemically treated cooling water with biocide, seawater, coastal industrial, chloride-rich water, aggressive chemical utility
Do NOT Specify For	Chemically treated cooling water (biocide attacks CI) — seawater — DM water — potable water (iron colour/taste) — pharma — food — chemical plant	Chloride-rich water — seawater — biocide-heavy treatment — specify SS316 instead	Very high temperature above 425°C

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Seat Selection Guide — NBR vs EPDM vs PTFE

Seat Material	Temperature Range	Specify For	Do Not Use For
NBR (Nitrile)	-20°C to +80°C	✅ Raw water, raw sewage and STP sludge, fuel oil and diesel pipeline isolation, compressed air — most economical seat for raw water and sewage service — standard seat for Indian civil and infrastructure projects on non-potable raw water	Hot water above 80°C — steam — ozone-treated water — HVAC cooling water with biocide (NBR degrades in biocide) — hydrocarbon-free chemical service
EPDM (Ethylene Propylene)	-40°C to +120°C	✅ Hot water and steam utility — HVAC chilled water and condenser water — potable water supply — ozone-treated water — cooling water with biocide and scale inhibitor treatment — most common Indian HVAC and water treatment butterfly valve seat	Oil, fuel, diesel, petroleum products — EPDM swells rapidly in hydrocarbon service — specify NBR for oil and fuel service
PTFE (Teflon)	-50°C to +180°C	Chemical service where EPDM and NBR are not chemically compatible — high temperature above 120°C — seawater — aggressive acid or alkali — widest chemical compatibility of the three seat options	Standard water service where EPDM is adequate — PTFE has higher operating torque and higher cost — do not over-specify PTFE where EPDM suffices

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Lever vs Gear Operated — Size and Torque Guide

Operator	Standard Size Range	How It Works	Specify When
Lever Operated	DN50 (2″) to DN150 (6″) standard	Quarter-turn handle — 90° rotation from fully open to fully closed — locking notches at open, closed, and intermediate positions — direct hand operation	✅ DN50–DN150 at PN10/PN16 — low to medium cycle frequency — operator can comfortably operate lever by hand — most economical operator for small to medium bore BFV
Gear Operated (Handwheel)	DN150 (6″) to DN300 (12″) standard — can be specified from DN100	Worm gear gearbox — multiple turns of handwheel to drive disc through 90° — gearbox multiplies torque — reduces force required at handwheel — position indicator shows disc position	✅ DN150 and above — where lever torque is too high for comfortable manual operation — high differential pressure service — frequent operation — large bore infrastructure isolation valves where handwheel is preferred over lever for operating convenience

For DN100–DN150, both lever and gear are available. Specify gear at DN100–DN150 when the valve is operated frequently, when differential pressure is high, or when the valve is in an elevated or difficult-access location where lever operation is inconvenient.

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Technical Specifications

Parameter	Specification
Valve Type	Concentric disc wafer butterfly valve — CI disc
Body Material	CI IS 210 FG260 (standard) / DI ASTM A536 (DN200+ heavy duty)
Disc Material	Cast Iron IS 210 — same grade as body
Seat Material	NBR (raw water, sewage, fuel) / EPDM (hot water, HVAC, treated water) / PTFE (chemical, high temp) — specify at order
Stem / Shaft	SS304 / SS316
End Connection	Wafer type (standard — clamped between flanges ASME B16.5 / IS 1538) / Lug type (dead-end service)
Size Range	DN50 (2″) to DN300 (12″)
Pressure Rating	PN10 / PN16
Temperature Range	NBR: -20°C to +80°C / EPDM: -40°C to +120°C / PTFE: -50°C to +180°C
Operation	Lever (DN50–DN150 standard) / Gear operated handwheel (DN150–DN300 standard)
Face to Face	As per MSS SP-67 / ISO 5752 Series 20
Testing	API 598 — hydrostatic shell test + seat leakage test
MOQ	10 Nos
HSN Code	84818090

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Applications in Indian Industries

Municipal Water Supply and Distribution

CI body CI disc NBR or EPDM seat gear operated DN150–DN300 PN10/PN16. Zone isolation valves on municipal water distribution networks — raw water from reservoir, river, or bore well — CI disc adequate for non-potable raw water at distribution stage. Furthermore, most economical large bore isolation valve specification for Indian municipal water board projects. MOQ 10 Nos — bulk project pricing available for 50+ Nos per size.

Sewage and Wastewater Treatment — ETP and STP

CI body CI disc NBR seat lever DN80–DN150 and gear DN150–DN300 PN10. Raw sewage inlet, inter-stage process isolation, treated effluent discharge. CI disc adequate for non-corrosive sewage and STP effluent. Moreover, NBR seat resists the range of chemicals and pH levels found in Indian municipal and industrial sewage. Most economical butterfly valve specification for ETP/STP isolation across sizes.

Fire Fighting Systems

CI body CI disc EPDM seat lever DN80–DN150 and gear DN150–DN300 PN10/PN16. Water supply isolation for fire hydrant networks, sprinkler systems, deluge systems, and fire hose reels — non-potable fire water — CI disc adequate for fire water service. Furthermore, lug type for dead-end service at fire hydrant termination points where downstream piping must be removable for maintenance.

Irrigation and Agricultural Pipelines

CI body CI disc NBR seat lever DN80–DN150 gear DN150–DN300 PN10. Irrigation main line and sector isolation — bore well water, canal water, reservoir water — CI disc adequate for raw irrigation water — most economical large bore specification for Indian agricultural infrastructure projects. Consequently, CI disc BFV is the standard specification for Gujarat, Maharashtra, and Rajasthan irrigation department projects.

Cooling Tower — Open Circuit Non-Treated Water

CI body CI disc EPDM seat gear DN100–DN300 PN10/PN16. Open circuit cooling tower make-up water and distribution isolation where water is not chemically treated with biocide or scale inhibitor. CI disc adequate for non-treated raw cooling water. However, specify SS304 or SS316 disc where cooling water is chemically treated — biocide attacks CI disc and causes premature corrosion and seat failure.

Infrastructure and Civil Projects

CI body CI disc NBR or EPDM seat lever and gear DN50–DN300 PN10/PN16. Storm water drainage isolation, raw water intake at pump stations, construction site dewatering, bulk water transfer pipelines. CI disc is the most economical and practical specification for large civil infrastructure projects where fluid is non-corrosive raw water and cost is the primary criterion for valve selection.

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Related Products — Krishna Industries (KELOR)

• Gear Operated Butterfly Valve — SS Disc — same gear operated configuration with SS304 disc for HVAC, potable water, and chemically treated water service
• Lever Operated Butterfly Valve — SS Disc — lever operated DN50–DN200 with SS304 disc for HVAC and clean water service
• Extended Stem Butterfly Valve — CI disc butterfly valve with extension spindle for underground buried pipeline and valve pit installations — same CI disc body configuration with extended stem
• Electric Actuated Butterfly Valve — automated version of the same CI/DI body butterfly valve for BMS-integrated HVAC and ETP automation
• Single Plate Wafer Check Valve (NRV) — install on pump discharge in the same raw water, sewage, and irrigation pump stations where CI disc butterfly valve provides suction and discharge isolation

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Frequently Asked Questions

1. When is CI disc butterfly valve the correct specification and when should I upgrade to SS disc?

CI disc is correct when the fluid is non-corrosive raw water, raw sewage, non-treated cooling water, irrigation water, or fire fighting water — and when iron contamination in the fluid is acceptable. In these applications, CI disc performs adequately and offers significant cost savings over SS disc, especially at large bore DN200–DN300 on bulk project orders. Upgrade to SS304 disc when the fluid is potable water (iron causes colour and taste issues), HVAC chilled or hot water (frequent operation accelerates CI disc corrosion), chemically treated cooling water with biocide (biocide attacks CI disc), or DM water (iron contaminates the demineralised water). Upgrade to SS316 disc when the fluid contains chloride, is seawater, or is aggressively treated.

2. Can CI disc butterfly valve be used for potable drinking water supply?

CI disc butterfly valves are generally not recommended for potable water distribution in India. Cast iron in contact with potable water can leach iron, causing discolouration (yellow or brown water) and metallic taste at the consumer tap — especially in low-flow or stagnant conditions. Furthermore, Indian BIS standards for potable water valves require materials that do not adversely affect water quality. Specify SS304 disc butterfly valve for potable water supply. CI disc is acceptable for raw water before treatment, fire fighting non-potable supply, and irrigation water.

3. What is the difference between wafer type and lug type for the same CI disc butterfly valve?

A wafer type butterfly valve is clamped between two pipeline flanges using bolts that pass through both flanges on either side of the valve. Both upstream and downstream flanges must remain in place — if either flange is removed, the valve falls out. A lug type butterfly valve has threaded lugs cast into the body that bolt independently to each pipeline flange. As a result, the downstream piping can be removed while the valve remains bolted to the upstream flange — correct for dead-end service, pump discharge, and pipeline terminations where downstream pipework must be removable for maintenance. Specify wafer for standard in-line service and lug for dead-end or pump discharge applications.

4. At what size should I specify gear operated instead of lever for a CI disc butterfly valve?

Specify gear operated from DN150 upward as standard. At DN150 with PN16 pressure and EPDM seat, the disc operating torque is already high enough that lever operation becomes physically demanding for most operators — especially during long operating cycles in field conditions. Furthermore, at DN200–DN300, lever operation is impractical without a torque multiplier. Gear operated is also recommended at DN100–DN125 when the valve is operated frequently (more than once per shift) or when high differential pressure across the disc is expected. Always specify gear for any CI disc butterfly valve that will be installed in a location where a full-strength adult operator cannot comfortably exert sufficient torque on a lever.

5. What is the MOQ?

MOQ is 10 Nos. Civil and infrastructure project orders — 10 to 1000+ Nos across sizes — with API 598 hydrostatic test certificate and GST invoice. Specify size, seat material (NBR / EPDM / PTFE), end connection (wafer / lug), pressure rating (PN10 / PN16), and operator (lever / gear) for each line item. WhatsApp your BOM for consolidated project pricing within 2 hours.

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Conclusion

Krishna Industries (KELOR) supplies Cast Iron Disc Butterfly Valves for raw water, sewage, cooling tower, irrigation, fire fighting, storm water, and infrastructure utility applications — CI body (IS 210) and DI body (ASTM A536) — Cast Iron disc — NBR / EPDM / PTFE seat — wafer type and lug type — PN10 / PN16 — lever operated (DN50–DN150) and gear operated with handwheel (DN150–DN300) — DN50 (2″) to DN300 (12″) — API 598 tested — GST invoice — Pan India dispatch from Ahmedabad. WhatsApp size, seat, end connection, and quantity for bulk project pricing within 2 hours.

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Note: This page covers the complete Cast Iron Disc Butterfly Valve range DN50–DN300. Also available at DN225 PN10 as listed — same specifications apply.