Email: sales@kelorvalves.com
Phone: +91 93135 43530
Address: 133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
KELOR Valves — This Wafer Check Valve (Non-Return Valve / NRV) price list covers the most procured valve categories in the Indian industrial market: Single Plate Swing Check and Dual Plate Wafer Check valves. Rates reflect mid-to-late 2026 market averages for direct manufacturer supply from our Ahmedabad facility. Prices cover Cast Iron (CI), Ductile Iron (DI), Carbon Steel (WCB), and Stainless Steel (SS304/SS316). All prices are ex-works, exclusive of 18% GST.
API 594 / API 6D
Dual Plate Non-Slam
IS:14816 Compliant
Pan-India Supply
Topic at a Glance
CI / DI Wafer NRV₹1,160 – ₹35,000 / pc
SS304 / SS316 NRV₹2,400 – ₹1,76,330 / pc
WCB (Carbon Steel)₹3,500 – ₹45,000 / pc
Size Range2″ to 24″ (DN50 – DN600)
Design StandardAPI 594 / API 6D / IS:14816
Pressure RatingPN10, PN16, Class 150/300
vs Flanged Premium30% – 40% Cheaper
HSN Code8481 (18% GST)
Table of Contents
- Wafer Check Valve Overview & Standards
- Cast Iron (CI) & Ductile Iron (DI) Price Chart
- Stainless Steel (SS304 / SS316) Price Chart
- Carbon Steel (WCB) Price Chart
- Single Plate vs. Dual Plate Cost & Performance
- Engineering: Water Hammer & Joukowsky Equation
- Wafer vs. Flanged Check Valve Comparison
- Bulk Discount Tiers for EPC & OEM Orders
- Manufacturing & Raw Material Cost Drivers
- Frequently Asked Questions
1. Wafer Check Valve Overview & Standards
Wafer Check Valves (also known as Non-Return Valves or NRVs) are designed to prevent backflow in piping systems, protecting pumps, compressors, and sensitive equipment from reverse flow damage. Unlike traditional flanged swing check valves, wafer check valves are “sandwiched” between two pipe flanges using standard bolts. This compact design reduces the face-to-face dimension by up to 80%, drastically lowering material costs, shipping weight, and installation space requirements. KELOR valves are manufactured and tested in strict compliance with API 594 (Check Valves: Flanged, Lug, Wafer, and Butt-Welded), API 6D (Pipeline Valves), and Indian Standard IS:14816.
| Parameter | Cast Iron (CI / DI) | Carbon Steel (WCB) | Stainless Steel (CF8 / CF8M) |
|---|---|---|---|
| Material Standard | IS:210 / ASTM A126 | ASTM A216 WCB | ASTM A351 CF8 (304) / CF8M (316) |
| Design Standard | API 594 / IS:14816 | API 594 / API 6D | API 594 / API 6D |
| Pressure Rating | PN10 / PN16 | Class 150 / Class 300 | Class 150 / Class 300 / PN40 |
| Seat Material | EPDM / Nitrile (Buna-N) | Metal-to-Metal / Stellite Overlay | PTFE / Viton / Metal-to-Metal |
| Primary Use | Water, HVAC, Firefighting, Irrigation | Oil, Gas, Steam, Non-corrosive liquids | Chemicals, Pharma, Food, Marine |
Understanding API 594 vs API 6D for Indian Procurement
For general industrial, water treatment, and HVAC applications across India, API 594 is the standard specification and offers the most cost-effective solution. However, if you are supplying to Oil & Gas pipelines, cross-country petroleum transport, or high-pressure hydrocarbon systems (e.g., Reliance, ONGC, or GAIL projects), API 6D certification is strictly mandated. API 6D valves undergo more rigorous hydrostatic and pneumatic shell testing and require full material traceability. Always confirm the project specification sheet before ordering to avoid site rejection.
2. Cast Iron (CI) & Ductile Iron (DI) Price Chart — Per Piece (INR)
Cast Iron (CI) and Ductile Iron (DI) wafer check valves dominate the Indian municipal water supply, firefighting (HDPE/PVC pipe networks), and commercial HVAC sectors. Ductile Iron (GGG40/GGG50) commands a slight premium over standard Grey Cast Iron due to its superior tensile strength and impact resistance, making it mandatory for high-pressure water mains and underground valve chambers. Prices below are for standard EPDM seated valves suitable for water and air service up to 80°C.
| Size (Inches / MM) | Cast Iron (CI) Single Plate | Ductile Iron (DI) Dual Plate | Approx. Weight (kg) |
|---|---|---|---|
| 2″ (50mm) | ₹1,160 | ₹1,850 | 3.5 kg |
| 3″ (80mm) | ₹1,650 | ₹2,400 | 5.2 kg |
| 4″ (100mm) | ₹2,100 | ₹3,200 | 7.8 kg |
| 6″ (150mm) | ₹3,400 | ₹5,100 | 14.5 kg |
| 8″ (200mm) | ₹5,200 | ₹7,800 | 24.0 kg |
| 10″ (250mm) | ₹7,500 | ₹11,200 | 36.5 kg |
| 12″ (300mm) | ₹9,800 | ₹15,800 | 52.0 kg |
| 16″ (400mm) | ₹16,500 | ₹24,500 | 85.0 kg |
| 20″ (500mm) | ₹24,000 | ₹35,000 | 130.0 kg |
| 24″ (600mm) | ₹32,500 | ₹48,000+ | 185.0 kg |
3. Stainless Steel (SS304 / SS316) Price Chart — Per Piece (INR)
Stainless Steel wafer check valves are mandatory for India’s chemical, pharmaceutical, dairy, and food processing industries (especially in Gujarat and Maharashtra MIDC belts). SS304 (CF8) is standard for mild corrosives and food-grade applications, while SS316 (CF8M) is required for chloride environments, marine applications, and aggressive acids. Seat materials for SS valves are typically PTFE (Teflon) or Viton to handle higher temperatures and chemical attack.
| Size (Inches) | SS304 (CF8) Class 150 | SS316 (CF8M) Class 150 | SS316 (CF8M) Class 300 |
|---|---|---|---|
| 1″ (25mm) | ₹2,400 | ₹3,200 | ₹4,500 |
| 2″ (50mm) | ₹4,800 | ₹6,500 | ₹8,900 |
| 3″ (80mm) | ₹7,200 | ₹9,800 | ₹13,500 |
| 4″ (100mm) | ₹11,500 | ₹15,200 | ₹21,000 |
| 6″ (150mm) | ₹18,500 | ₹24,000 | ₹34,500 |
| 8″ (200mm) | ₹28,000 | ₹38,500 | ₹52,000 |
| 10″ (250mm) | ₹42,000 | ₹56,000 | ₹78,000 |
| 12″ (300mm) | ₹65,000 | ₹85,000 | ₹1,15,000 |
| 16″ (400mm) | ₹95,000 | ₹1,25,000 | ₹1,65,000 |
| 24″ (600mm) | ₹1,45,000 | ₹1,76,330+ | Custom Quote |
4. Carbon Steel (WCB) Price Chart — Per Piece (INR)
WCB (Wrought Carbon Steel) wafer check valves bridge the gap between brittle Cast Iron and expensive Stainless Steel. They are the standard choice for oil & gas pipelines, thermal power plants, and high-temperature steam or hydrocarbon services where pressures exceed PN16. WCB valves can handle temperatures up to 425°C when fitted with metal-to-metal or Stellite overlay seats.
| Size (Inches) | WCB Class 150 | WCB Class 300 |
|---|---|---|
| 2″ (50mm) | ₹3,500 | ₹5,200 |
| 4″ (100mm) | ₹6,800 | ₹9,500 |
| 6″ (150mm) | ₹11,200 | ₹16,500 |
| 8″ (200mm) | ₹17,500 | ₹24,000 |
| 12″ (300mm) | ₹32,000 | ₹45,000+ |
5. Single Plate vs. Dual Plate Cost & Performance
The most common engineering decision when specifying wafer check valves is choosing between a traditional Single Plate (Swing) design and a modern Dual Plate (Folding Disc) design. While Dual Plate valves carry a 15–25% price premium, they solve critical hydraulic issues like water hammer that frequently destroy single plate valves and piping systems in pump discharge lines.
| Feature | Single Plate (Swing Check) | Dual Plate (Folding Disc) |
|---|---|---|
| Relative Cost | Base Price (1x) | +15% to +25% Premium |
| Weight & Size | Heavy, longer face-to-face length | Ultra-compact, 50% lighter |
| Closing Mechanism | Relies on gravity & reverse flow to close | Spring-assisted, closes before flow reversal |
| Water Hammer | High risk (slamming effect) | Eliminated (non-slam design) |
| Installation | Must be installed horizontally or vertically up | Can be installed in any orientation (horizontal/vertical) |
| Best Application | Low velocity, gravity flow, HVAC return lines | Pump discharge, high velocity, compressor lines |
Installation Orientation Tip
Because Single Plate valves rely on gravity to return the heavy disc to the closed position, they must be installed in horizontal pipelines with the hinge pin at the top, or in vertical pipelines with upward flow. If installed incorrectly, the disc will not seal. Dual Plate valves, utilizing torsion springs, are completely independent of gravity and can be installed in horizontal, vertical (up or down flow), or even angled pipelines without any loss of sealing performance.
6. Engineering: Water Hammer & The Joukowsky Equation
Why do EPC engineers specify Dual Plate valves despite the 20% price premium? The answer lies in fluid dynamics. When a pump stops suddenly, fluid reverses direction. A Single Plate valve waits for the reverse flow to push the heavy disc shut, causing a massive shockwave (Water Hammer) that bursts pipes. A Dual Plate valve uses springs to shut before the fluid reverses.
The Joukowsky Equation (Water Hammer Pressure Rise)
Formula: ΔP = ρ × c × Δv
Where:
ΔP= Magnitude of pressure surge (Water Hammer)ρ= Fluid density (e.g., 1000 kg/m³ for water)c= Speed of sound in the fluid (approx. 1480 m/s in water)Δv= Change in fluid velocity at the moment of valve closure
The KELOR Dual Plate Advantage: By utilizing spring-assisted closure, the Dual Plate valve reaches the closed position before flow reversal occurs. Therefore, Δv approaches zero smoothly, eliminating the massive ΔP pressure spike. Spending ₹2,000 more on a Dual Plate valve routinely saves lakhs of rupees in avoided pipeline bursts and pump impeller damage in Indian municipal water and industrial pumping stations.
7. Wafer vs. Flanged Check Valve Comparison
Why do EPC contractors and OEMs prefer Wafer Check Valves over traditional Flanged Check Valves? The economics and logistics heavily favor the wafer design for 90% of standard piping applications.
30-40%Cheaper than Flanged Ends
50%Lighter Shipping Weight
80%Shorter Face-to-Face Length
0Extra Gaskets Required
Important Installation Limitation
Wafer Check Valves cannot be used for end-of-line service. Because they do not have their own bolt holes, they must be sandwiched between two mating flanges to hold the valve body together and seal the pipeline. If you need a valve at the very end of a pipe discharging to a tank or atmosphere, you must use a Flanged or Lug-type Check Valve.
8. Bulk Discount Tiers for EPC & OEM Orders
Indian valve manufacturers operate on volume-based pricing. Procurement for EPC water projects, OEM skid manufacturing, and annual maintenance contracts (AMC) qualify for progressive discounts. The tiers below apply to consolidated orders shipped from our Ahmedabad manufacturing facility.
| Order Value (INR) | Typical Discount | Buyer Profile | Additional Perks |
|---|---|---|---|
| Under ₹50,000 | List price | Retail / Local Hardware / Maintenance | Standard dispatch (5-7 days) |
| ₹50,000 – ₹2,00,000 | 5% – 8% off | Small Contractors / Fabricators | Free PMI testing on SS valves |
| ₹2,00,000 – ₹10,00,000 | 10% – 15% off | Industrial OEMs / EPC Subcontractors | Free 3.1 Mill Test Certificates |
| ₹10,00,000+ | 15% – 22% off | Large EPC / Government Tenders | Dedicated account manager, priority CNC machining |
9. Manufacturing & Raw Material Cost Drivers
Unlike machined fasteners, valve pricing is heavily influenced by foundry casting costs, CNC machining time, and hydrostatic testing overhead. The prices in this 2026 guide reflect current Indian foundry rates for sand casting and investment casting.
| Raw Material / Process | Cost Impact | Trend (2026) | Impact On |
|---|---|---|---|
| Grey Iron / WCB Scrap | Base Foundry Cost | Stable | CI, DI, and WCB valve bodies |
| SS316 / Molybdenum | High Alloy Premium | Slight upward trend | Drives the 35% premium of SS316 over SS304 |
| VTL CNC Machining | High Overhead | Stable | Larger valves (16″+) require massive lathes |
| API 598 Testing | Quality Assurance | Mandatory | Hydrostatic shell and seat leakage testing |
| Inconel / SS Springs | Component Cost | Stable | Dual Plate torsion springs for non-slam closing |
Chemical & Petrochemical
SS316 (CF8M) Dual Plate valves with Viton seats for aggressive acids and chlorides in hubs like Dahej, Vapi, and Mumbai MIDC. Prevents backflow into sensitive reactor vessels.
Municipal Water & HVAC
Ductile Iron (DI) Single Plate valves for cooling towers, RO plants, and municipal pumping stations. EPDM seats ensure zero-leakage at low PN16 pressures.
Power & Thermal Plants
WCB Carbon Steel valves with Stellite overlay seats for high-temperature steam and feedwater lines (NTPC, Adani Power). Handles temperatures up to 425°C.
Pharma & Dairy
SS304 (CF8) valves with PTFE seats and electropolished finishes for hygienic, food-grade, and sanitary CIP (Clean-In-Place) systems.
Commercial Specifications
Payment Terms30% Advance, 70% against Proforma Invoice before dispatch
DeliveryEx-works Ahmedabad; 7–15 working days for standard sizes
CertificationEN 10204 Type 3.1 Mill Test Certificate & Hydrostatic Test Report
PackingStandard plywood cases; export-worthy fumigated wood on request
HSN Code8481 (Taps, cocks, valves and similar appliances)
GST18% applicable on all industrial valve sales in India
Minimum OrderNo strict MOQ, but bulk pricing applies above ₹50k order value
Surface FinishEpoxy coated (CI/WCB), Passivated (SS), or bare machined
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API 598 Hydrostatic Testing
Every valve is subjected to 1.5x rated pressure shell testing and 1.1x seat leakage testing before dispatch, ensuring zero-leakage performance in critical pipelines.
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3.1 Material Traceability
Full EN 10204 Type 3.1 certificates provided for WCB and Stainless Steel valves, detailing exact chemical composition and mechanical properties for EPC compliance.
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Pan-India Supply Network
Rapid dispatch to major industrial hubs: Dahej/Vapi (Chemicals), Pune/Mumbai (OEMs), Chennai (Automotive), and NCR (Infrastructure) via trusted surface transport.
📐
Free CAD Drawings
2D PDF and 3D STEP/CAD models available for all standard wafer check valves to assist EPC engineers with piping layout and clash detection.
⚙️
Custom Face-to-Face Dimensions
Need a valve to replace an existing European or Japanese make? We can machine custom face-to-face lengths to match your existing pipe spool without modifying the pipeline.
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EIL & Vendor Approvals
KELOR is an approved vendor for multiple Indian EPC giants and PSU undertakings. Contact our sales team for current vendor approval lists and technical questionnaires.
Important Disclaimer
All prices published in this 2026 guide are indicative market rates for standard API 594 / IS:14816 compliant Wafer Check Valves and are intended for budgetary estimation. Actual quoted prices will vary based on exact pressure class (PN10 vs PN40), seat material (EPDM vs Viton vs PTFE), actuation requirements, and current raw metal indices. Always request a formal Proforma Invoice (PI) from our sales desk before finalizing project budgets. Prices exclude 18% GST and freight.
Download the Complete 2026 PDF Rate List & CAD Drawings
Are you an EPC Contractor, OEM, or Procurement Manager? Get the full technical catalog and bulk pricing tiers for Pan-India supply.
📧 Email: sales@kelorvalves.com 📞 WhatsApp InquiryFrequently Asked Questions
What is the price of a Wafer Check Valve in India in 2026?
The price of a Wafer Check Valve (NRV) in India ranges from ₹1,160 for a 2-inch Cast Iron single plate valve up to ₹1,76,330+ for a 24-inch SS316 dual plate valve. Pricing depends heavily on the body material (CI, DI, WCB, SS304, SS316), the plate design (single vs. dual), and the pressure rating (PN16 vs Class 150/300).
What is the difference in price between Single Plate and Dual Plate Wafer Check Valves?
Dual Plate Wafer Check Valves typically cost 15% to 25% more than Single Plate (Swing) Wafer Check Valves of the same material and size. However, dual plate valves are significantly lighter, require less installation space, and close much faster via spring-assistance, which prevents water hammer and protects piping systems in high-flow pumping applications.
Are Wafer Check Valves cheaper than Flanged Check Valves?
Yes, Wafer Check Valves are generally 30% to 40% cheaper than equivalent Flanged Check Valves. Because wafer valves are sandwiched between two pipe flanges and do not have their own heavy flanged ends or bolt holes, they use significantly less raw material and require less CNC machining, resulting in lower manufacturing costs and reduced shipping weight.
What is the HSN Code and GST rate for Wafer Check Valves in India?
The HSN code for industrial check valves in India is 8481 (Taps, cocks, valves and similar appliances for pipes). The standard GST rate applied to Wafer Check Valves is 18%. Registered Indian businesses can claim full input tax credit on this GST amount.
How do you calculate Water Hammer to justify a Dual Plate Valve?
Water hammer pressure rise is calculated using the Joukowsky equation: ΔP = ρ × c × Δv. Because Dual Plate valves use torsion springs to close before flow reversal (Δv approaches zero smoothly), they eliminate the massive shockwave (ΔP) caused by heavy Single Plate swing discs slamming shut, saving lakhs in pipeline repair costs.