Email:
[email protected]
Phone:
+91 93135 43530
Address:
133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
Butterfly Valve Supplier India — Krishna Industries (KELOR), Ahmedabad
Complete butterfly valve range for Indian EPC contractors, water treatment plants, HVAC MEP contractors, and industrial buyers — CI / DI / WCB / SS304 / SS316 body — EPDM / NBR / PTFE / Viton seat — wafer / lug / double flanged — lever / gear / electric / pneumatic / chain wheel / extended stem — DN50 (2″) to DN600 (24″) — PN10 / PN16 — API 598 tested — IS 13095 conforming.
GST Invoice · API 598 Certificate · MOQ 10 Nos · 50–500 Nos per PO · Pan India Dispatch · 2-Hour Quote
A butterfly valve is a quarter-turn rotary valve in which a disc rotates 90° around a central shaft to open or close flow. The disc remains in the flow path at all times — making butterfly valves more compact and lighter than gate or globe valves at equivalent bore. This is the preferred choice for large-diameter industrial pipelines across India where space, weight, and cost per bore size are critical.
Complete Butterfly Valve Range — Select Your Type
By End Connection
Wafer Type — LeverCI body · DN50–DN200 · PN10/PN16
Wafer Type — GearCI/DI body · DN150–DN600 · PN10/PN16
Lug Type BFVCI/DI/SS body · Dead-end service · DN50–DN600
Double Flanged BFVCI/DI body · Large bore · DN300–DN1200
By Operator / Actuation
Lever OperatedDN50–DN150 · Fast quarter-turn · Most economical
Gear OperatedDN150–DN600 · Worm gear · Self-locking
Electric Actuated220V AC · BMS/DCS · On-off / modulating
Pneumatic ActuatedCompressed air · Fail-safe spring return
Chain Wheel OperatedElevated pipeline · Floor-level chain operation
Extended StemUnderground buried · Valve pit · Insulated pipe
By Body Material
CI Body BFVIS 210 FG260 · Most economical · Water HVAC fire
Ductile Iron BFVASTM A536 · Large bore DN200+ · Higher strength
SS304 Body BFVCF8 · HVAC DM water pharma mild chemical
SS316 Body BFVCF8M · Chemical chloride coastal pharma GMP
PTFE Lined BFVAggressive acid alkali — full bore lining
WCB Carbon Steel BFVClass 150/300 · Oil gas steam · Higher pressure
By Seat Material
EPDM Seat BFVHVAC · Treated water · Biocide service
NBR Seat BFVRaw water · Sewage · Irrigation
PTFE Seat BFVChemical · High temp · Corrosive media
Viton Seat BFVHydrocarbon · Fuel oil · High temp chemical
Seat Material Selection Guide — EPDM vs NBR vs PTFE vs Viton
⚠️ Most common Indian project error: Specifying NBR seat for biocide-treated HVAC cooling water. Chlorine and bromine-based biocides degrade NBR within 6–12 months. Always specify EPDM for HVAC cooling water butterfly valves.
| Seat | Temp Range | ✅ Specify For | ❌ Not For |
|---|---|---|---|
| EPDM | −40°C to +120°C | ✅ HVAC chilled and condenser water, potable water, treated water, biocide-treated cooling tower water, DM water, hot water circuits — standard for all Indian HVAC and water treatment BFV specs | Mineral oil, petroleum, diesel, hydrocarbon — EPDM swells in hydrocarbons |
| NBR (Nitrile) | −20°C to +80°C | Raw water (non-treated), sewage, irrigation canal water, non-treated cooling water without biocide, fuel oil service | Biocide-treated HVAC water, hot water above 80°C, ozone-treated water |
| PTFE | −10°C to +180°C | Aggressive chemical, concentrated acid and alkali, high temperature above 120°C, seawater, pharmaceutical process | Standard water where EPDM is adequate — PTFE has higher operating torque |
| Viton (FKM) | −15°C to +200°C | Hydrocarbon service, fuel oil, diesel, crude oil, high-temperature chemical, petroleum refinery | Hot water and steam — Viton not required for water service |
Disc Material Selection — CI Disc vs SS304 vs SS316
| Disc | Cost | ✅ Specify For | ❌ Not For |
|---|---|---|---|
| CI Disc | Lowest | Raw water, sewage, slurry, irrigation — non-potable, non-treated, infrequent operation — CI disc corrosion acceptable where water quality and contamination not a concern | Potable water, treated HVAC water — CI corrodes and contaminates treated water, fails within 3–5 years |
| SS304 Disc (CF8) | ✅ Standard | ✅ Most common — HVAC treated water, potable water, DM water, mild chemical — 15–20+ year disc life — standard for all Indian HVAC and water treatment BFV BOMs | High chloride (above 150 ppm), seawater — SS304 pits in aggressive chloride service |
| SS316 Disc (CF8M) | Premium +15–20% | ✅ Coastal industrial (Mundra, Hazira, Dahej, Vizag, Chennai), seawater cooling, high chloride, offshore — Mo addition resists chloride pitting | Standard inland non-chloride HVAC and water supply — unnecessary premium |
Wafer Type vs Lug Type — Which to Specify
| Feature | Wafer Type | Lug Type |
|---|---|---|
| Body Design | Plain body — clamped between two pipeline flanges using through-bolts | Threaded inserts (lugs) cast into body — each flange bolts independently to the valve lugs |
| Dead-end service | ❌ Both flanges must always be present | ✅ Downstream flange can be removed while valve stays bolted to upstream flange |
| Cost | ✅ Lower — simpler body | Higher — threaded lug inserts add cost |
| Specify when | ✅ Standard in-line service — correct choice for ~90% of Indian BFV installations | Pump discharge, pipeline terminal end, equipment isolation where downstream removal is required |
Operator Selection — Lever vs Gear vs Electric vs Pneumatic
| Operator | Size Range | ✅ Specify For |
|---|---|---|
| Lever | DN50–DN150 | Frequent manual operation at accessible floor level — fast quarter-turn — 10-position locking for throttle — most economical |
| Gear (Worm) | DN150–DN600 | Large bore where lever torque too high — self-locking holds partial-open position for throttling — ISO 5211 pad for future actuator upgrade — mandatory from DN200+ |
| Electric Actuated | DN50–DN600 | BMS / DCS automation — HVAC zone control — ETP/STP automated isolation — 220V AC on/off or modulating — remote operation |
| Pneumatic | DN50–DN400 | Compressed air — fast cycling — fail-safe spring return — process plant ESD interlock service |
| Chain Wheel | DN100–DN600 | Valve at 3–15m elevation — floor-level chain operation — overhead pipeline, elevated pipe rack |
| Extended Stem | DN50–DN400 | Underground buried, valve pit, insulated piping — rigid extension spindle to top key at accessible level |
💡 PTFE seat note: Operating torque is 20–40% higher than EPDM at the same size and pressure. If specifying PTFE seat, specify gear operator one size earlier than the EPDM threshold — i.e., from DN125 or DN150 rather than DN200.
Technical Specifications — CI Wafer Butterfly Valve (Standard Grade)
| Parameter | Specification |
|---|---|
| Body Material | Cast Iron IS 210 FG260 (standard) / DI ASTM A536 / WCB ASTM A216 / CF8 SS304 / CF8M SS316 |
| Disc Material | SS304 CF8 (standard) / SS316 CF8M / CI (most economical) |
| Seat / Liner | EPDM (standard) / NBR / PTFE / Viton — replaceable resilient seat moulded integral to body |
| Shaft / Stem | SS304 (standard) / SS316 |
| End Connection | Wafer (standard) / Lug (threaded inserts) / Double Flanged (large bore DN300+) |
| Size Range | DN50 (2″) to DN600 (24″) standard |
| Pressure Rating | PN10 / PN16 / ANSI Class 150 |
| Temperature Range | −40°C to +120°C (EPDM) / −20°C to +80°C (NBR) / −10°C to +180°C (PTFE) |
| Face to Face | ISO 5752 Series 20 / MSS SP-67 |
| Flange Compatibility | Universal wafer — fits ANSI B16.5 Class 150 / DIN PN10 / DIN PN16 / IS 1538 without modification |
| Leakage Class | Class VI (zero leakage) per API 598 |
| Design Standard | API 609 / BS EN 593 / IS 13095 |
| Testing Standard | API 598 — hydrostatic shell + seat leakage |
| ISO 5211 Top Flange | Standard on all gear operated — electric / pneumatic upgrade without valve removal |
| MOQ | 10 Nos per size per configuration |
| HSN Code | 84818090 |
Standard Dimensions — Wafer Butterfly Valve (ISO 5752 Series 20)
| Size | DN | Face to Face (mm) | Flange OD (mm) | Bolt Circle (mm) | No. of Bolts |
|---|---|---|---|---|---|
| 2″ | DN50 | 43 | 125 | 92 | 4 |
| 3″ | DN80 | 46 | 160 | 127 | 4 |
| 4″ | DN100 | 52 | 180 | 145 | 8 |
| 6″ | DN150 | 56 | 240 | 200 | 8 |
| 8″ | DN200 | 60 | 295 | 254 | 8 |
| 10″ | DN250 | 68 | 355 | 310 | 12 |
| 12″ | DN300 | 78 | 410 | 362 | 12 |
| 16″ | DN400 | 102 | 515 | 463 | 16 |
| 20″ | DN500 | 114 | 620 | 565 | 20 |
| 24″ | DN600 | 127 | 725 | 670 | 20 |
Industries & Applications
💧 Municipal Water Supply
Bulk water transmission mains, pump station isolation, OHT inlet/outlet, zone distribution — 50–500 Nos per EPC project BOM.
❄️ HVAC Systems
Chilled water AHU isolation, cooling tower supply/return, condenser water circuits — EPDM seat mandatory for biocide-treated cooling water.
🔥 Fire Fighting
Pump discharge, hydrant ring main isolation, sprinkler zone valves — CI body EPDM PN16 standard Indian fire specification.
🌾 Irrigation
PMKSY distribution headers, main canal off-takes, drip system isolation — large bore DN200–DN600 gear operated.
🏭 ETP / STP Plants
Inlet, outlet, aeration basin, sludge recirculation — large bore gear operated standard for treatment plant BOMs.
⚗️ Chemical Plants
Gujarat chemical belt (Ankleshwar, Vapi, Dahej) — SS316 CF8M body PTFE seat — chemical distribution headers.
⚡ Power Plants
Cooling water distribution headers, condenser inlet/outlet, DM water utility — DI large bore gear operated.
🏗️ EPC & Infrastructure
Government water supply, smart cities, industrial townships — 500–5000 Nos per project — single GST invoice.
Why EPC Contractors and Plant Buyers Choose Krishna Industries
🏭
Sourced from GIDC Vatva / Naroda
Ahmedabad manufacturers — Gujarat factory pricing, shortest supply chain, fastest dispatch.
📦
50–500 Nos per PO
EPC project volumes — all types, all sizes, all body grades in one consolidated PO — single GST invoice.
📄
Complete Documentation
GST invoice (GSTIN: 24AKLPP6499B1ZT), API 598 test certificate, MTC for SS grades, IS 13095 conformance — full QA package.
🔬
API 598 Tested
Every valve hydrostatic shell tested and Class VI seat leakage tested to API 598 — certificate with each lot.
🚚
Pan India Dispatch
Maharashtra, Tamil Nadu, Rajasthan, Karnataka, UP, Delhi NCR and all states — VRL / Professional Courier — 2–7 days transit.
⏱️
2-Hour Quote
WhatsApp complete BOM — size, body, disc, seat, operator, wafer/lug, qty. Project pricing within 2 hours.
Need Bulk Butterfly Valve Pricing for Your Project or MRO Order?
Share your BOM: size (DN) · body (CI / DI / SS304 / SS316) · disc (SS304 / SS316 / CI) · seat (EPDM / NBR / PTFE) · operator (lever / gear / electric) · wafer or lug · quantity. Project BOM pricing within 2 hours.
📲 WhatsApp Your BOM — Price in 2 HoursSupply Coverage — PAN India from Ahmedabad
Krishna Industries dispatches butterfly valves from Ahmedabad to all major industrial cities: Mumbai, Pune, Nashik, Nagpur, Aurangabad (Maharashtra) · Chennai, Coimbatore, Bengaluru, Hyderabad, Vizag, Kochi (South India) · Delhi, Noida, Gurugram, Jaipur, Indore (North/Central India) · Surat, Vadodara, Rajkot, Ankleshwar, Vapi, Dahej (Gujarat) · Kolkata, Patna, Raipur, Lucknow (East/Central India) via VRL and Professional Courier.
Frequently Asked Questions — Butterfly Valve Specification
What is the difference between wafer type and lug type butterfly valve?
A wafer type butterfly valve has a plain body clamped between two pipeline flanges using through-bolts spanning both flanges — both flanges must always be present and the valve cannot be used as a dead-end valve. A lug type butterfly valve has threaded inserts (lugs) cast into the valve body allowing each pipeline flange to bolt independently to the valve. The downstream piping can therefore be unbolted and removed for maintenance while the valve remains securely bolted to the upstream flange. Specify lug type for pump discharge isolation, terminal ends of pipelines, and equipment isolation where downstream removal is required without shutting the entire system. Specify wafer type for all standard in-line service — it is more economical and the correct choice for approximately 90% of Indian butterfly valve installations.
Why is EPDM seat specified for HVAC cooling water butterfly valves instead of NBR?
Indian HVAC cooling water systems use biocide treatment chemicals — typically chlorine or bromine-based — to prevent Legionella growth in cooling towers. NBR (nitrile rubber) degrades in these biocide chemicals within 6–12 months — the biocide attacks NBR polymer chains causing the seat to harden, crack, and fail. EPDM resists chlorine and bromine-based biocides reliably throughout its service life. EPDM also handles the full HVAC temperature range from chilled water at 7°C to hot water circuits at 80°C, while NBR has a lower hot water limit. For all Indian HVAC butterfly valve specifications involving biocide-treated cooling water or hot water circuits, EPDM seat is the mandatory specification.
From what size should I specify gear operated instead of lever for a butterfly valve?
The standard Indian project specification threshold is DN150 (6″) for gear operated. From DN50 to DN125 (2″–5″) lever operated is standard — torque is comfortable for single-person manual operation. At DN150, lever becomes heavy for frequent operation — specify gear if the valve will be operated regularly. From DN200 (8″) and above, gear operated is mandatory — lever torque exceeds comfortable single-person operation. For PTFE seat valves, operating torque is approximately 20–40% higher than EPDM at the same size — specify gear one size earlier than the EPDM threshold.
What is the difference between CI disc and SS304 disc in a CI butterfly valve?
Both use the same Cast Iron body and EPDM/NBR seat — only the disc material differs. A CI disc corrodes in treated HVAC water and potable water — within 3–5 years the corroded disc leaves rust particles contaminating treated water and loses structural integrity causing valve failure. An SS304 disc is corrosion resistant — 15–20+ year service life in treated water — no contamination risk. For HVAC and water treatment butterfly valve BOMs, SS304 disc is the standard specification. CI disc is acceptable only for raw water, sewage, and irrigation where water quality is low and contamination is not a concern.
Does a butterfly valve fit ANSI, DIN, and IS flanges without modification?
Yes. The standard wafer butterfly valve body (ISO 5752 Series 20 face-to-face) has a universal body design that fits between ANSI B16.5 Class 150, DIN PN10, DIN PN16, and IS 1538 flanges of the same nominal bore without any modification. The through-bolt pattern depends on the connecting flanges, not the valve body — no change to the valve is needed when the flange standard changes. This universal fit is one of the main reasons wafer butterfly valves dominate Indian industrial piping.
Do you supply butterfly valves conforming to IS 13095 for government tenders?
Yes. Butterfly valves sourced from Ahmedabad — conform to IS 13095 and API 609. IS 13095 test reports and API 598 hydrostatic test certificates are available for government tender documentation including JICA, World Bank, and state water board funded bulk water supply projects. WhatsApp your project specification and BOM — we confirm the applicable certificate before quotation.
What is the MOQ and how do I order for a project BOM?
MOQ is 10 Nos per size per configuration. For EPC project BOMs — 50–500+ Nos across CI and SS body grades, EPDM and NBR seat, lever and gear operator, wafer and lug, multiple sizes — WhatsApp or email your complete BOM listing each line: size (DN), body, disc, seat, operator, end connection (wafer/lug), pressure (PN10/PN16), and quantity. Consolidated project pricing within 2 hours, formal quotation within 4 hours. Every order includes GST invoice (GSTIN: 24AKLPP6499B1ZT), API 598 test certificate per lot, and E-Way bill for interstate supply.