Cast Iron Wafer Check Valve 1 Inch Supplier India — CI CS SS | KELOR

Cast Iron Wafer Check Valve 1 Inch Supplier in India — CI / CS / SS | KELOR

Name: Kelor Valves
Address: IN
Price range: $$

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, supplies Cast Iron Wafer Check Valve 1 Inch — CI (Cast Iron), CS (Carbon Steel), SS (Stainless Steel) body options — wafer type non-return valve (NRV) — PN10 / PN16 — water, oil, gas, steam — compact design for installation between flanges — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

Industrial Valves, Fasteners, Gaskets & Safety Equipment — our complete business scope. GST invoice with every dispatch.

⚡ Quick Reference

SupplierKrishna Industries (KELOR) — Ahmedabad, Gujarat

Valve TypeWafer Check Valve (NRV)

Size1 Inch (DN25)

Body MaterialCI / CS / SS

Pressure RatingPN10 / PN16

End ConnectionWafer (between flanges)

MediaWater, Oil, Gas, Steam, Chemicals

MOQ10 Nos per body material

Cast Iron Wafer Check Valve 1 Inch — Overview

Krishna Industries (KELOR) supplies the Cast Iron Wafer Check Valve in 1 Inch (DN25) — a compact, lightweight non-return valve designed for installation between two pipeline flanges. The wafer-type design eliminates the need for extended bolted flanges on the valve body itself, reducing both weight and installation space. The valve opens automatically when forward flow pressure exceeds the cracking pressure and closes instantaneously when flow reverses, preventing backflow and protecting upstream equipment such as pumps, compressors, and heat exchangers from damage caused by reverse flow or water hammer.

KELOR supplies this valve in three body material grades to cover the full range of industrial service conditions. CI (Cast Iron, GG25/FC250) is the most economical choice for water, HVAC, and general industrial service. CS (Carbon Steel, WCB/ASTM A216) provides higher mechanical strength for oil, gas, and steam applications. SS (Stainless Steel, SS304/SS316) offers corrosion resistance for chemical, seawater, food-grade, and pharmaceutical installations. All three material grades are available in PN10 (10 bar) and PN16 (16 bar) pressure ratings from verified vendor partners with Pan India dispatch from the Ahmedabad warehouse.

How a Wafer Check Valve Works

A wafer check valve is a swing-type non-return valve with a disc (flapper) that pivots on a hinge pin at the centre of the valve body. During forward flow, the pressure differential across the valve lifts the disc away from the seat, allowing fluid to pass through. When flow stops or reverses, the disc swings back onto the seat under gravity and reverse flow pressure, sealing the valve and preventing backflow. The wafer body has no extended flanges — it is clamped between two pipeline flanges using through-bolts, full-face gaskets, and the flange bolt circle of the adjacent piping.

Forward Flow Opens

When pipeline pressure exceeds the cracking pressure, the disc pivots open on its hinge pin. Fluid flows through the valve body with minimal pressure drop. The disc stays fully open during continuous forward flow.

Continuous Flow

During steady forward flow, the disc remains in the fully open position, parallel to the flow path. Pressure drop across the valve is minimal — typically 0.1 to 0.3 bar at rated flow for a 1 inch wafer check valve.

Flow Stops

When the pump stops or the system pressure equalises, forward flow velocity drops. The disc begins to swing back toward the seat under gravity and the reducing forward pressure differential.

Backflow Prevention

If reverse flow occurs, the pressure differential pushes the disc firmly onto the seat, sealing the valve. Reverse flow is completely blocked. The valve reopens automatically when forward flow resumes.

Body Material Selection — CI / CS / SS

CI — Cast Iron CS — Carbon Steel SS — Stainless Steel

Material	Grade / Standard	Specify For	Not For
CI (Cast Iron)	GG25 / FC250 / ASTM A126 Class B	Water distribution, HVAC chilled water, fire-fighting systems, general industrial service, air and gas lines where media is non-corrosive — most economical option — standard for Indian municipal and building services	Seawater, corrosive chemical, acidic media, high-chloride water — cast iron corrodes rapidly in chloride environments
CS (Carbon Steel)	WCB / ASTM A216	Oil and gas pipelines, steam condensate return, compressed air at elevated pressure, petrochemical process — higher mechanical strength than CI — suitable for temperatures up to 400°C	Corrosive chemical, seawater, food-grade, pharmaceutical — carbon steel corrodes without corrosion allowance or coating
SS (Stainless Steel)	SS304 (CF8) / SS316 (CF8M)	Chemical process, seawater, food and beverage, pharmaceutical, coastal installations, DM water — excellent corrosion resistance — SS316 preferred for chloride service	Cost-sensitive non-corrosive applications where CI is adequate — SS commands a 2 to 3x price premium over CI

💡 Material Selection Rule for 1 Inch Wafer Check

For water, HVAC, fire-fighting, and general service: CI body — the most common and economical choice for 1 inch piping in building services and municipal water systems. For oil, gas, steam, and elevated temperature: CS body — provides the strength and temperature rating required for process piping. For chemical, seawater, food, or pharmaceutical: SS body — specify SS304 for general corrosion resistance or SS316 for chloride-containing service. The price increases in the order CI < CS < SS, so always select the material that meets the service requirement without over-specifying.

Technical Specifications

Parameter	Specification
Product	Cast Iron Wafer Check Valve — Non-Return Valve (NRV)
Size	1 Inch (DN25)
Body Material	CI (GG25) / CS (WCB) / SS (SS304 / SS316)
Design	Wafer Type — Swing Disc
Pressure Rating	PN10 (10 Bar) / PN16 (16 Bar)
End Connection	Wafer — installed between pipeline flanges
Face-to-Face	Per EN 558-1 / ASME B16.10 (as applicable)
Operating Media	Water, Oil, Gas, Steam, Chemicals
Operating Temperature	CI: -10°C to 200°C / CS: -29°C to 400°C / SS: -196°C to 400°C
Seat Material	EPDM / NBR / PTFE (as per media requirement)
Disc Material	CI / CS / SS / Duplex (matching or overlaid body material)
MOQ	10 Nos per body material

Applications

Water Treatment & Distribution

Municipal water supply, water treatment plants, pump discharge lines, and distribution networks use 1 inch wafer check valves to prevent backflow when pumps stop. CI body with EPDM seat is standard for water service.

Oil & Gas Pipelines

Oil and gas pipeline systems use CS or SS body wafer check valves for backflow prevention on pump discharge, compressor discharge, and metering stations. CS body for crude oil and natural gas, SS body for sour gas with H2S.

Chemical & Petrochemical

Chemical process plants and petrochemical refineries use SS body wafer check valves for corrosion resistance against aggressive chemicals, acids, and solvents. PTFE seat for widest chemical compatibility.

HVAC & Fire-Fighting

HVAC chilled water circuits and fire-fighting pump installations use CI body 1 inch wafer check valves. Compact wafer design fits between standard flanges without extra space — critical for tight mechanical room layouts.

Installation Guidelines

Correct installation of a wafer check valve is essential for reliable operation and long service life. The 1 inch wafer check valve is designed for installation between two pipeline flanges using through-bolts and full-face gaskets. Follow these guidelines for every installation:

🔧 Installation Steps

Verify valve size (1 inch DN25) matches the pipeline size and flange class before installation
Check the flow direction arrow on the valve body — the arrow must point in the direction of forward flow
Install full-face gaskets on both sides of the valve between the valve body and the pipeline flanges
Insert through-bolts through both flanges and the valve body, ensuring proper alignment
Tighten bolts in a criss-cross pattern evenly to the specified torque — uneven tightening distorts the wafer body and causes leakage
For vertical installation: install with flow going upward (bottom to top) only — never install with downward flow
Ensure at least 5 pipe diameters of straight pipe upstream of the valve for stable flow conditions

⚠ Do Not Install with Downward Flow

A wafer check valve relies on gravity and reverse flow pressure to close the disc onto the seat. In a vertical downward-flow pipeline (flow from top to bottom), gravity holds the disc away from the seat and the valve cannot close. Always install with flow going upward in vertical pipelines. For horizontal pipelines, the valve can be installed in any orientation as long as the flow direction arrow matches the pipeline flow direction.

Why Choose KELOR

✅

Quality from Verified Vendors

Every valve is sourced from verified vendor partners who supply to consistent quality standards. KELOR inspects incoming stock for dimensional accuracy and finish quality before dispatch.

🚚

Pan India Dispatch

CI body 1 inch wafer check valves dispatched within 3 to 5 working days. CS and SS valves within 5 to 7 working days. Express dispatch available for urgent project requirements.

💰

Competitive Pricing

KELOR offers competitive pricing for project BOM orders and bulk quantities. CI body valves are the most economical option for water and general service applications.

🌐

Export Supply

KELOR supplies wafer check valves for export orders with export-grade packing, commercial invoices, and shipping documentation. Export pricing varies by destination.

🏢

OEM Branding Support

KELOR supports OEM buyers with neutral packing and customised labelling. Buyer’s brand name and part number can be printed on packaging for bulk project orders.

📋

Full Documentation

GST invoice with every dispatch. Documentation customised for project requirements including purchase order references and delivery challans.

Commercial Information

💰 Pricing & Ordering

MOQ10 Nos per body material

GST18% (HSN 8481 80 90)

Dispatch3–5 days (CI), 5–7 days (CS / SS)

PackingStandard export carton with product label

PaymentAdvance or as agreed for project orders

DocumentationGST Invoice, Delivery Challan

ExportAvailable with commercial invoice and shipping docs

RFQWhatsApp or email body material, quantity, delivery location

Frequently Asked Questions

Is the 1 inch Cast Iron Wafer Check Valve suitable for seawater?

For seawater and saline environments, specify SS (stainless steel) body instead of CI or CS. Cast iron corrodes rapidly in seawater due to chloride attack. Stainless steel (SS304 or SS316) body provides the necessary corrosion resistance for seawater, brackish water, and coastal industrial applications.

What is the difference between PN10 and PN16 pressure rating for a 1 inch wafer check valve?

PN10 corresponds to a maximum working pressure of 10 bar (approximately 150 psi) at ambient temperature. PN16 corresponds to 16 bar (approximately 232 psi). For most water distribution and general industrial applications at 1 inch pipe size, PN10 is adequate. PN16 is specified for higher-pressure steam, gas, or chemical service where the system operating pressure exceeds 10 bar.

Can a wafer check valve be installed vertically?

Yes — a wafer check valve can be installed in a vertical pipeline provided the flow direction is upward (bottom to top). In a vertical upward-flow installation, gravity assists the disc closing when flow stops, ensuring reliable backflow prevention. Never install a wafer check valve in a vertical downward-flow pipeline — the disc would remain open under gravity and the valve would not close.

What is the delivery time for 1 inch CI wafer check valve bulk orders?

Standard dispatch is 3 to 5 working days for CI body 1 inch wafer check valves. CS and SS body valves may require 5 to 7 working days. Express dispatch is available for urgent project requirements. MOQ is 10 Nos per body material. WhatsApp or email body material, quantity, and delivery location for pricing within 2 hours during business hours.

Which body material should I choose — CI, CS, or SS — for a 1 inch wafer check valve?

Choose CI (cast iron) for water distribution, HVAC chilled water, fire-fighting systems, and general industrial service where the media is non-corrosive — CI is the most economical option. Choose CS (carbon steel) for oil and gas pipelines, steam condensate, and slightly elevated temperature service where higher mechanical strength is needed. Choose SS (stainless steel — SS304 or SS316) for chemical service, seawater, food processing, pharmaceutical, and any corrosive or chloride-containing media.

What gaskets are required for installing a 1 inch wafer check valve between flanges?

A 1 inch wafer check valve is clamped between two pipeline flanges using full-face gaskets on both sides. Standard gasket material is rubber (NBR or EPDM) for water service and spiral wound graphite gasket for steam and high-temperature service. The gasket inner diameter must match the valve bore and the outer diameter must cover the full flange face. Bolts must be evenly torqued in a criss-cross pattern to prevent uneven clamping that can distort the valve body.

Request a Quote for 1 Inch Cast Iron Wafer Check Valve

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🔗 Connect with KELOR

Instagram — @kelorvalves LinkedIn — Krishna Industries (KELOR) WhatsApp — +91 93135 43530 Email — [email protected]

Krishna Industries (KELOR) supplies Cast Iron Wafer Check Valve 1 Inch in three body material grades — CI for water and general service, CS for oil, gas, and steam, and SS for chemical and corrosive media. Available in PN10 and PN16 pressure ratings, the wafer-type NRV design provides compact, lightweight backflow prevention for installation between standard pipeline flanges. KELOR dispatches from the Ahmedabad warehouse with Pan India coverage, GST-compliant documentation, and competitive pricing for project BOM orders and bulk quantities. WhatsApp or email your specifications for pricing within 2 hours during business hours.