PVC Butterfly Valve | UPVC Wafer Lug Type | DN50–DN300 | PN6 PN10 | Supplier India

Description

PVC Butterfly Valve Supplier India | UPVC DN50–DN300 | PN6 PN10 | Wafer & Lug | KELOR Ahmedabad

Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Sizes: DN50–DN300 | Pressure: PN6 / PN10
Body: Rigid UPVC | Shaft: SS316 | Seat: EPDM / NBR

Introduction – PVC Butterfly Valve Supplier India

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, India, is a trusted B2B supplier of PVC Butterfly Valves sourced from verified Indian manufacturers. We supply PVC / UPVC Butterfly Valves in rigid UPVC body — SS316 stainless steel shaft — EPDM and NBR seat — PP disc option — wafer and lug type — sizes DN50 to DN300 (2″ to 12″) — PN6 and PN10 pressure rating — lever, gear, and pneumatic actuated — DIN 16962 / ISO 5752 face-to-face dimensions.

PVC Butterfly Valves are the correct choice wherever corrosion is the primary concern and operating conditions stay within the material limits — temperature below 60°C continuous, pressure within PN6 or PN10, and media compatible with PVC and the chosen seat material. They are widely used in water treatment plants, irrigation networks, swimming pools, aquaculture farms, chemical dosing systems, and industrial utility UPVC piping systems — where a metal butterfly valve would corrode rapidly and a PVC valve lasts 15 to 20 years with minimal maintenance.

PVC vs UPVC vs CPVC vs PP — The Material Confusion Explained

Indian buyers, project specifications, and supplier catalogues use PVC, UPVC, CPVC, and PP interchangeably or incorrectly. This table clarifies exactly what each material is and when to specify it:

PVC and UPVC are the same material in valve context — rigid, unplasticised PVC. The term UPVC is technically more correct; PVC in valve catalogues always means UPVC. If you see “PVC butterfly valve” and “UPVC butterfly valve” in the same catalogue at the same price — they are the same product.

When to upgrade from PVC to PP: If your chemical is a strong alkali (caustic soda NaOH, potassium hydroxide KOH), bleaching agent (sodium hypochlorite NaOCl above 10%), or any solvent — specify PP body instead of PVC. PP butterfly valves are available from Krishna Industries on request.

Wafer Type vs Lug Type — End Connection Guide

Seat Material Selection — EPDM vs NBR

For 95% of PVC butterfly valve applications in India — specify EPDM seat. EPDM is the correct standard specification for water treatment, irrigation, swimming pools, aquaculture, and general chemical utility with PVC body. NBR is rarely the right choice with PVC body — if your media requires NBR, verify that PVC body is also compatible.

Critical: PVC Pressure-Temperature Derating

PVC loses pressure-handling capability as temperature rises. This is the most important technical fact that most Indian project specifications miss — and the most common cause of PVC butterfly valve failure in Indian plants.

Practical rule for Indian engineers: If your pipeline is outdoors in Gujarat or Rajasthan and carries water in summer — the pipeline temperature can reach 40–50°C in direct sun. Derate your PVC valve pressure rating accordingly. For hot process water, cooling tower return, or any media above 50°C — do not specify PVC. Specify CPVC or metal.

PVC Chemical Compatibility — Quick Reference

For chemical compatibility outside this table: Contact Krishna Industries with your chemical name, concentration, and temperature — we will confirm PVC compatibility before supply.

Technical Specifications

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Applications in Indian Industries

• Municipal and industrial water treatment plants (WTP) — DN80 to DN300 wafer type EPDM seat — chlorinated and ozonated water, filter inlet/outlet, clear water pipelines
• Sewage treatment plants (STP / ETP) — UPVC body for corrosion-free long service in treated water and effluent lines
• Irrigation and agricultural piping — DN50 to DN200 lever operated — lightweight, easy field installation, long UV and weathering resistance
• Swimming pools and water parks — DN50 to DN150 — chlorinated water, backwash lines, filtration system isolation
• Aquaculture and fish farms — UPVC non-toxic, seawater and brackish water compatible
• Chemical dosing systems — dilute acid and alkali feed lines in WTP and ETP — confirm chemical compatibility before specifying
• Industrial utility UPVC piping — compressed air (dry, ambient temperature), process water, cooling water — where UPVC piping system is installed
• RO water treatment plants — feed water, permeate, and reject water lines — UPVC the standard material for RO systems in India
• Plumbing and building services — large bore domestic and commercial water supply isolation

Installation Notes — Matching PVC Butterfly Valve to UPVC Piping

PVC butterfly valves are designed for installation in UPVC / PVC piping systems with standard flanged connections per DIN 2501 PN10. Key installation notes for Indian project sites:

• Flange drilling: Confirm your UPVC pipe flange drilling — DIN 2501 PN10 is standard in India. ANSI / ASME B16.5 flanged butterfly valves cannot be bolted to DIN PN10 UPVC flanges without adapter plates
• Gasket material: Use EPDM flat gaskets between UPVC flange and butterfly valve face — never use metallic spiral wound gaskets on plastic flanges
• Bolt torque: Do not overtighten — UPVC flanges crack under excessive bolt torque. Use torque wrench and follow manufacturer’s specified values
• UV exposure: UPVC has moderate UV resistance — for permanently outdoor exposed pipelines, painted or UV-stabilised UPVC is preferable
• Thermal expansion: UPVC expands more than metal per degree — allow expansion loops in long straight UPVC pipe runs adjacent to butterfly valves
• Support: Butterfly valve weight must be supported independently — do not allow valve weight to load UPVC pipe flanges

EPC and Project Buyers — Bulk Supply

• Complete UPVC piping system valve BOM — butterfly valves, ball valves, check valves, Y strainers in single consolidated order
• All sizes DN50 to DN300, wafer and lug type, in single order — single GST invoice, single dispatch
• Hydrostatic test certificates provided
• GST invoices — GSTIN: 24AKLPP6499B1ZT
• Fast dispatch from Ahmedabad — 3 to 5 working days standard stock sizes
• MOQ 10 Nos per line item — scalable to full project BOM quantities

PAN India Supply Coverage

Gujarat — Ahmedabad, Surat, Vadodara, Rajkot, Bharuch, Ankleshwar, Vapi, Dahej
Maharashtra — Mumbai, Pune, Navi Mumbai, Nashik, Aurangabad, Nagpur
Rajasthan — Jaipur, Jodhpur, Udaipur, Kota, Bhilwara
Delhi NCR — Delhi, Noida, Gurgaon, Faridabad, Ghaziabad
Tamil Nadu — Chennai, Coimbatore, Madurai, Tirupur, Salem
Karnataka — Bangalore, Hubli, Mysore, Belgaum, Mangalore
Telangana and Andhra Pradesh — Hyderabad, Vizag, Vijayawada, Kakinada
Madhya Pradesh — Indore, Bhopal, Jabalpur, Pithampur
Punjab and Haryana — Ludhiana, Amritsar, Chandigarh, Panipat
West Bengal — Kolkata, Durgapur, Asansol, Haldia

Export FOB Mundra / JNPT. IEC: AKLPP6499B.

Related Products from Krishna Industries

• PN10 Butterfly Valve (CI / DI) — metal butterfly valve for higher pressure and temperature service
• Gear Operated Butterfly Valve — large bore metal butterfly valve DN200–DN1200
• Y Strainer Valve — upstream protection for UPVC piping systems
• Wafer Check Valve — non-return valve for pump discharge in water treatment systems

Frequently Asked Questions

1. What is the difference between PVC and UPVC butterfly valve?

In valve context, PVC and UPVC refer to the same material — rigid unplasticised polyvinyl chloride. UPVC is the technically correct term; PVC butterfly valve in supplier catalogues always means UPVC. If you see both terms at the same price — they are the same product. The distinction only matters for pipes, where plasticised PVC (flexible) and UPVC (rigid) are genuinely different products.

2. What is the maximum temperature for a PVC butterfly valve?

60°C continuous maximum. Critically — pressure rating drops significantly with temperature. A PN10 valve at 20°C handles 10 bar; the same valve at 60°C handles only approximately 2 bar. For applications above 60°C, specify CPVC (up to 93°C) or metal butterfly valve. For outdoor Gujarat and Rajasthan summer conditions, account for pipeline ambient temperature reaching 45–50°C and derate accordingly.

3. Which seat material — EPDM or NBR?

EPDM for water, chlorinated water, dilute acid, dilute alkali, ozone, and general chemical service — correct for 95% of Indian PVC butterfly valve applications. NBR for oil-based media and fuels. If your media is water or a water-based chemical — specify EPDM.

4. Can PVC butterfly valve handle caustic soda (NaOH)?

PVC handles dilute NaOH up to approximately 40% concentration at ambient temperature. For concentrated caustic soda above 40% or elevated temperature, specify PP (polypropylene) body butterfly valve — PP has significantly better alkali resistance than PVC. Contact us with your NaOH concentration and temperature for material confirmation.

5. What is the wafer face-to-face dimension for PVC butterfly valve?

DIN 16962 / ISO 5752 Series 20 for wafer type. This matches standard UPVC piping flanges per DIN 2501 PN10. Always confirm face-to-face dimension when replacing an existing valve — different standards (ANSI vs DIN) have different face-to-face dimensions for the same nominal size.

6. Can PVC butterfly valve be actuated?

Yes — pneumatic single-acting and double-acting actuators available for process automation. Gear operated available for larger sizes DN150 and above where lever torque becomes high. Specify fail-open or fail-close and supply voltage / control signal in your RFQ for actuated versions.

7. What chemicals are NOT compatible with PVC butterfly valve?

Ketones (acetone, MEK), aromatic hydrocarbons (toluene, xylene, benzene), chlorinated solvents (trichloroethylene, DCM), concentrated sulphuric acid above 70%, hydrofluoric acid, and tetrahydrofuran (THF). For any of these media, do not specify PVC — contact us for alternative material recommendations.

8. Wafer type or lug type for my application?

Wafer type for mid-line installation in continuous UPVC pipeline — both flanges always present. Lug type for end-of-line service, pump discharge isolation, and any location where one side of pipeline must be removed independently while the valve remains in service. Lug type costs more but provides the flexibility of dead-end service.

9. What is the flange drilling standard for PVC butterfly valve?

DIN 2501 PN10 standard — the same as Indian UPVC pipe flanges per IS 4985. Always confirm your UPVC pipe flange drilling before ordering — if your piping system uses ANSI B16.5 flanges instead of DIN, the bolt circle will not match and adaptors are needed.

10. What is the MOQ?

MOQ is 10 Nos. Mixed sizes and types (wafer + lug) in one order welcome.

Conclusion

The PVC / UPVC Butterfly Valve supplied by Krishna Industries (KELOR) is the correct choice for water treatment, irrigation, aquaculture, swimming pools, RO systems, and mild chemical service in UPVC piping — rigid UPVC body — SS316 shaft — EPDM and NBR seat — wafer and lug type — DN50 to DN300 — PN6 and PN10 — DIN 16962 / ISO 5752 face-to-face. Temperature limit 60°C — pressure derated above 20°C. Full chemical compatibility guide available for project specifications. Sourced from verified Indian manufacturers with test certificates and GST documentation. Fast PAN India dispatch from Ahmedabad.

For water treatment engineers, irrigation project buyers, EPC contractors, and industrial purchase managers — contact Krishna Industries (KELOR), your trusted PVC Butterfly Valve supplier in Ahmedabad, Gujarat, India. WhatsApp your size, seat material, type (wafer/lug), and quantity for bulk pricing within 2 hours.