Double Flanged Butterfly Valve | DI CI WCB | EPDM PTFE | DN200–DN1200 | Municipal Industrial Supplier India

Description

Double Flanged Butterfly Valve Supplier India | DI GGG50 / CI / WCB | Epoxy Coated | PN10 PN16 Class 150 | IS 13095 EN 593 | Municipal & Industrial | KELOR

Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Standard: IS 13095 / EN 593 / BS 5155 / API 609
Sizes: DN200–DN1200 | Rating: PN10 / PN16 / Class 150 / Class 300

Double Flanged Butterfly Valve Supplier in India

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, is a B2B supplier of Double Flanged Butterfly Valves — Ductile Iron (DI GGG50 / EN-GJS-500-7), Cast Iron (CI), and WCB body — epoxy coated (FBE or liquid epoxy) — SS304, SS316, Nickel-Aluminium-Bronze disc — EPDM, NBR, PTFE, and metal seat — integral double flanged ends — EN 1092-2 PN10/PN16 / ASME B16.5 Class 150/300 — DN200 to DN1200 — gear operated (standard DN200 and above), pneumatic, and electric actuated — IS 13095 / EN 593 / BS 5155 / API 609 — EN 558 Series 13/14 face-to-face — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

The double flanged butterfly valve is the correct butterfly valve body style for municipal water supply infrastructure, buried pipeline service, large bore industrial isolation, water treatment plants, and power plant cooling water systems — where the thin-body wafer type cannot be used due to installation constraints, buried service requirements, or large bore structural demands. The integral flanges cast onto both body ends allow the valve to be bolted independently to the pipe flanges on each side, support its own weight and pipeline thrust, and remain leak-free even where pipeline alignment shifts — making it the only butterfly valve body style suitable for underground and buried service.

Double Flanged vs Wafer vs Lug — Body Style Comparison

Why Ductile Iron (DI) — Not Cast Iron — for Municipal Water

Ductile Iron (DI, also called SG Iron, Spheroidal Graphite Iron, or GGG50) is the standard body material for double flanged butterfly valves in Indian municipal water supply projects — and for good reason. Cast iron is brittle — it can crack suddenly under soil load, water hammer pressure surge, or mechanical impact without warning. Ductile iron has significantly higher tensile strength and elongation — it bends rather than cracks under stress, giving time for detection and repair before failure. Indian municipal specifications including JICA, ADB, and World Bank funded water supply projects typically mandate DI GGG50 body for buried butterfly valves.

For above-ground industrial service where mechanical shock is not a concern — power plant, process plant utility — Cast Iron body is acceptable and more economical. For buried mains, pumping station headers, and water treatment plant below-ground pipework, specify DI GGG50.

Epoxy Coating — Internal and External

Double flanged butterfly valves for potable water and municipal water supply service are epoxy coated inside and outside to prevent corrosion of the DI or CI body. Two types are available:

Colour: RAL 5005 (signal blue) is the standard external colour for water supply butterfly valves in India — matches Indian municipal pipeline colour coding. Confirm colour requirement in project RFQ if different colour is specified.

Technical Specifications

Applications in Indian Industries and Infrastructure

• Municipal water supply projects — DI GGG50 liquid epoxy EPDM PN16 — buried main isolation valves, pumping station discharge headers, water treatment plant distribution — AMRUT, JNNURM, Smart City, and JICA/ADB funded water supply projects across India — IS 13095 compliance and DI body are standard tender requirements
• Water treatment plants (WTP) — DI or CI epoxy coated EPDM PN10/PN16 — DN200 to DN600 — inlet channel isolation, filter bank isolation, treated water outlet headers, sludge dewatering feed
• Irrigation infrastructure — DI EPDM PN10 — main canal distribution, pumping station discharge, large bore header isolation on canal distribution networks — Gujarat, Rajasthan, Maharashtra irrigation projects
• Power plant cooling water — DI or CI EPDM PN10/PN16 DN300–DN1200 — condenser cooling water inlet/outlet isolation, cooling tower basin supply and return headers — large bore isolation at lower cost than gate valve
• Thermal and hydro power plant auxiliary — CI or WCB DN200–DN600 — service water, fire water, auxiliary cooling water — double flanged for self-supporting installation on large bore overhead piping
• Industrial cooling water and process water — CI or DI EPDM PN16 — plant utility water headers, cooling tower supply and return isolation, DN200–DN600
• Sewage treatment plants (STP) — DI epoxy EPDM PN10 — raw sewage inlet, treated effluent outlet, sludge recirculation headers — buried and above-ground service
• Large bore fire water mains — DI EPDM PN16 DN200–DN400 — fire hydrant ring main isolation, fire pump discharge headers — double flanged for buried fire main service

Related Products — Krishna Industries (KELOR)

• Gear Operated Butterfly Valve — wafer type gear operated butterfly valve for above-ground DN200+ industrial service
• Lever Operated Butterfly Valve — wafer and lug type DN40–DN300 for industrial project supply
• PN16 Butterfly Valve — wafer type PN16 for above-ground industrial and HVAC service
• Dual Plate Check Valve — pump discharge NRV to pair with butterfly valve isolation on large bore pump stations
• Cast Iron Gate Valve — alternative for large bore isolation where full bore and low pressure drop required

Frequently Asked Questions

1. Why can a double flanged butterfly valve be buried but a wafer type cannot?

A wafer type butterfly valve depends on continuous through-bolt compression between the two pipe flanges to maintain its seal — the thin body is held in compression between the flanges. In a buried pipeline, ground movement, soil settlement, and thermal expansion can cause the through-bolts to lose tension over time, allowing the wafer body to shift and leak. A double flanged butterfly valve has its own integral flanges — it bolts independently to the pipe flanges on each side and maintains its seal regardless of pipe movement. This is why all buried pipeline butterfly valve specifications require double flanged body.

2. What body material for municipal water supply tender in India?

Ductile Iron (DI GGG50 / EN-GJS-500-7) is the standard for Indian municipal water supply tenders — required by IS 13095 for buried service. DI is stronger and more ductile than CI — it does not crack under soil load, water hammer surge, or mechanical impact. Epoxy coating (liquid epoxy or FBE) is applied internally and externally. For JICA, ADB, and World Bank project specifications, confirm specific material grade and coating requirements in the tender document before ordering.

3. What is EN 558 Series 13 face-to-face?

EN 558 is the European standard that defines face-to-face dimensions for industrial valves. Series 13 (short pattern) and Series 14 (long pattern) are the two face-to-face dimensions for double flanged butterfly valves. Series 13 is the most common in Indian project specifications. Face-to-face must match the pipe spool dimensions — always confirm EN 558 series required by your project before ordering. Wafer type butterfly valves use Series 20 — different dimension series entirely.

4. What size range is available from stock vs sourced to order?

DN200 to DN600 in standard DI GGG50 EPDM PN16 gear operated — available from stock or short lead time sourcing — typically 5 to 10 working days dispatch. DN700 to DN1200 — sourced to order — 15 to 30 working days depending on manufacturer production schedule. For project orders of 10+ Nos at any size, provide size list and required delivery date for schedule confirmation.

5. Is IS 13095 compliance available for government tenders?

Yes — IS 13095 compliant double flanged butterfly valves with DI GGG50 body, epoxy coating, EPDM seat, and compliance documentation are available. Hydro test certificates (API 598 / EN 12266), dimensional inspection reports (EN 558 Series 13), and material test reports (EN 1563 for DI GGG50) available on request for government tender submissions. Specify full documentation requirement at order stage.

6. What is the MOQ?

MOQ is 10 Nos total. Project orders for municipal, water treatment, power plant, or large industrial — 10 to 100+ Nos — handled with complete project documentation, hydro test reports, and consolidated dispatch. WhatsApp size list, body material, pressure class, and quantity for project pricing within 2 hours.

Conclusion

The Double Flanged Butterfly Valve supplied by Krishna Industries (KELOR) is the correct butterfly valve body style for buried pipeline service, municipal water infrastructure, large bore industrial isolation, water treatment, power plant cooling water, and any application where wafer type is not suitable — DI GGG50, CI, and WCB body — epoxy coated — SS304, SS316, Ni-Al-Bronze disc — EPDM, NBR, PTFE, metal seat — DN200 to DN1200 — PN10, PN16, Class 150, Class 300 — gear, pneumatic, and electric actuated — IS 13095 / EN 593 / BS 5155 / API 609 — EN 558 Series 13/14 face-to-face — API 598 tested — MTR and IS 13095 compliance documentation for government tenders. GST invoice, Pan India dispatch from Ahmedabad. WhatsApp size, body material, pressure class, coating, and quantity for project pricing within 2 hours.