Wafer check valve manufacturers in India — Krishna Industries (Since 1985)

Industrial wafer check valve suppliers — Krishna Industries Since 1985

Bulk supplier of Single Plate Wafer Check Valves in Cast Iron (CI), Mild Steel (MS), SS304 and SS316 from Ahmedabad, Gujarat. Size range: 1″ to 24″. Design standard: API 594. GST invoice. PAN India dispatch.

A Wafer Check Valve (also called a Single Plate NRV or Wafer Type Non-Return Valve) is a compact, lightweight backflow prevention valve designed to be clamped between two pipe flanges. It operates automatically — opening when upstream pressure exceeds downstream pressure, and closing instantly when flow stops or reverses, preventing water hammer and backflow damage.

Krishna Industries, trading as KELOR Valves, has been sourcing and supplying industrial valves from Ahmedabad, Gujarat since 1985. We supply wafer check valves directly to EPC contractors, fire system integrators, HVAC companies, water treatment plants, and MRO traders across India — at competitive bulk pricing with full documentation support.

Available Material Grades — Choose Your Variant

CI Wafer Check Valve Cast Iron Body · Most Popular MS Wafer Check Valve Mild Steel Body SS304 Wafer Check Valve Stainless Steel 304 SS316 Wafer Check Valve Stainless Steel 316

Technical Specifications

ParameterSpecification
Valve TypeSingle Plate Wafer Check Valve (Non-Return Valve / NRV)
Design StandardAPI 594 / BS EN 16668
Size Range1″ to 24″ (DN25 to DN600)
Pressure RatingPN10 / PN16 / ANSI Class 150
End ConnectionWafer Type (clamp between flanges — ANSI / DIN / IS flange compatible)
Body Material OptionsCast Iron (CI) · Mild Steel (MS/WCB) · Stainless Steel SS304 · Stainless Steel SS316
Disc MaterialSS304 / SS316 (standard) · MS (CI models)
Seat / SealEPDM (standard) · Nitrile (NBR) · PTFE (on request)
OperationAutomatic (flow-pressure operated) — spring-assisted closure
Flow DirectionUnidirectional — arrow marked on body
InstallationHorizontal or Vertical (upward flow)
Temperature Range-10°C to +120°C (EPDM) · up to +200°C (PTFE)
Testing StandardAPI 598 / BS EN 12266
HSN Code848180
Country of SupplyIndia 🇮🇳 (Dispatched from Ahmedabad, Gujarat)

Material Grade Selection Guide

Choosing the right material grade ensures long valve life and safe operation. Use the table below to select the correct grade for your application:

Grade Best For Media Avoid
CI (Cast Iron) Water supply, fire fighting, HVAC, general utilities Water, air, non-corrosive fluids Acids, seawater, aggressive chemicals
MS (WCB Carbon Steel) Oil, gas, steam, higher temperature lines Oil, gas, steam, neutral fluids Corrosive media, wet conditions
SS 304 Food, pharma, mild chemical, potable water Water, food-grade fluids, dilute acids Chloride environments, concentrated acids
SS 316 Offshore, seawater, chloride environments, chemical processing Seawater, chlorides, aggressive chemicals Hydrochloric acid at high concentration

Industries & Applications

🔥 Fire Fighting Systems

Pump discharge lines, sprinkler networks, hydrant systems. UL/FM-compatible on request.

💧 Water Treatment

Municipal WTP, pump stations, distribution mains, overhead tanks.

❄️ HVAC Systems

Chilled water circuits, AHU connections, cooling tower loops.

⚗️ Chemical Industry

Process pipelines, dosing lines (SS316 recommended for corrosive media).

⚡ Power Plants

Cooling water systems, utility lines, EPC project bulk supply.

🏗️ EPC & Infrastructure

Bulk project supply for government tenders, industrial estates, SEZ development.

🏭 Sugar & Distilleries

Process water and utility lines within sugar, ethanol and distillery plants.

🏢 Commercial Buildings

High-rise building services, hotels, hospitals, institutional complexes.

Key Technical Advantages

  • Compact wafer design — up to 60% shorter face-to-face dimension vs conventional swing check valves; ideal for tight installation spaces
  • Spring-assisted fast closure — disc closes before flow reverses, eliminating water hammer and reverse shock in pump systems
  • Low pressure drop — streamlined single-disc design ensures minimal flow resistance and lower energy consumption
  • Elastomer seat seal — EPDM/NBR/PTFE seat options ensure bubble-tight shutoff across all common industrial fluids
  • Lightweight construction — significantly lighter than flanged check valves; reduces pipe support and installation cost
  • Universal flange compatibility — fits ANSI 150, DIN PN10/PN16, IS flange standards without modification
  • Both horizontal and vertical installation — install in any orientation (vertical must be upward flow for spring-loaded models)

Why EPC Contractors and Traders Choose Krishna Industries

🏭

Supplier Since 1985

38+ years of sourcing and supply experience. Competitive pricing with no unnecessary middleman margin.

📦

Bulk Supply Capacity

Reliable supply for large EPC projects and repeat MRO orders. Selected sizes in ready stock.

📄

GST Compliant Billing

100% GST invoice with E-Way bill for every shipment. GST No: 24AKLPP6499B1ZT.

🚚

PAN India Dispatch

Dispatching from Ahmedabad to all major industrial cities in 7–15 working days.

🔬

Test Certificates Available

Material test certificates (MTC), hydro test reports and third-party inspection support on request.

🏷️

Private Label / OEM Supply

Supply under your brand name for traders and distributors. MOQ applies.

Need a Bulk Price for Your Project or Stock Order?

Share your size, material grade, quantity and delivery location. We reply within 2 hours on WhatsApp.

📲 WhatsApp for Bulk Price

Supply Coverage — PAN India

Krishna Industries dispatches wafer check valves from our Ahmedabad warehouse to all major industrial cities and states across India, including: Mumbai, Pune, Nashik, Nagpur (Maharashtra) · Chennai, Coimbatore, Bengaluru, Hyderabad (South India) · Delhi, Noida, Gurugram, Faridabad (NCR) · Kolkata (East India) · Jaipur, Indore, Lucknow, Kanpur, Ludhiana (Central & North India) · Surat, Vadodara, Rajkot (Gujarat) and all other states.

Export supply also available: FOB Mundra / Nhava Sheva. CIF / DAP terms on request.

People Also Ask

What is the difference between a wafer and a flanged check valve?
A wafer check valve has a slim, lightweight body designed to be clamped directly between two pipe flanges using long bolts that pass through the entire assembly. It does not have its own flanges. A flanged check valve has its own flanged ends that bolt directly to the mating pipe flanges, making it heavier, bulkier, and more expensive.
How does a dual plate wafer check valve work?
A dual plate wafer check valve features two semi-circular, spring-loaded plates (discs) attached to a central hinge pin. When forward fluid flow occurs, the pressure pushes the plates open against the spring tension. When the flow stops or reverses, the springs instantly force the plates to close against the valve seat, preventing backflow.
What are the standard pressure and temperature ratings for wafer check valves?
Standard pressure ratings are typically PN10, PN16, and ANSI Class 150. Temperature ratings depend on the seat material: EPDM seats handle -10°C to +120°C, Nitrile (NBR) handles up to +80°C, and PTFE or Viton seats can withstand temperatures up to +200°C.
How do you properly install a wafer type check valve between flanges?
To install, align the valve between two mating pipe flanges, ensuring the flow direction arrow on the valve body matches the pipeline flow. Insert the bolts through the flange holes and the valve body, then tighten the nuts evenly in a star pattern to ensure a uniform seal.
What materials are best for wafer check valves in highly corrosive environments?
For highly corrosive environments, Stainless Steel 316 (SS316) is the best standard choice due to its molybdenum content, which resists chlorides and industrial chemicals. For extreme chemical applications, exotic alloys like Duplex stainless steel or valves with PTFE linings are recommended.
How can water hammer be prevented in wafer check valve applications?
Water hammer is prevented by using spring-loaded wafer check valves. The internal spring forces the disc to close rapidly just before the fluid flow completely stops and reverses direction, preventing the sudden slam and shockwave associated with traditional swing check valves.
What is the advantage of a spring-loaded wafer check valve over a standard dual plate?
A spring-loaded single plate wafer check valve typically features fewer moving parts compared to a dual plate design. This results in a lower pressure drop, reduced risk of mechanical failure, lower maintenance requirements, and better performance in vertical upward flow installations.