Cast Iron Foot Valve | CR13 Trim | Flanged Class 150 | Suction NRV with Strainer | Supplier India

Description

Cast Iron Foot Valve Supplier India | CI CR13 Flanged Class 150 | IS 14846 | Pump Suction NRV with Strainer | KELOR

Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Body: Cast Iron (CI) | Trim: CR13 (13% Chromium)
Standard: IS 14846 | Sizes: DN40–DN300 | Rating: Class 150 / PN10 / PN16

Cast Iron Foot Valve Supplier in India

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, is a B2B supplier of Cast Iron Foot Valves — CI (ASTM A126) body — 13% Chromium (CR13) trim — flanged end — ANSI Class 150 / PN10 / PN16 — sizes DN40 to DN300 (1½” to 12″) — integrated SS304 perforated strainer — IS 14846 compliant — hydrostatic and seat leakage tested — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

A foot valve is a check valve with an integrated strainer, installed at the bottom of the pump suction pipe — submerged in the sump, tank, open channel, or borewell. It serves two functions simultaneously: the check valve prevents backflow when the pump stops, keeping the suction pipe primed so the pump restarts without manual priming; the strainer prevents sand, gravel, leaves, and debris from entering the suction pipe and damaging the pump impeller, seals, and casing. The Cast Iron foot valve with CR13 trim is the standard specification for Indian water supply, irrigation, municipal pumping, and fire fighting installations.

What is a Foot Valve — vs Check Valve vs NRV

Key point for Indian buyers: A foot valve is always the FIRST component in the suction line — installed at the very bottom, submerged. If you have a wafer check valve or swing NRV installed in the middle of a suction pipeline, that is a pipeline non-return valve, not a foot valve. The integrated strainer in a foot valve is what distinguishes it from a standard check valve — and why it must be at the bottom where debris enters.

CR13 Trim — Why It is Better Than Plain CI Trim for Indian Water Conditions

Indian water sources — open sumps, agricultural canals, municipal reservoirs, borewells — contain suspended solids, sand, silt, and dissolved minerals that are highly abrasive to soft seating surfaces. Plain cast iron trim (CI disc on CI seat) wears rapidly in these conditions, leading to seat leakage and loss of prime within 6 to 12 months.

13% Chromium (CR13) stainless steel trim provides significantly better wear resistance and moderate corrosion resistance compared to plain CI trim. The harder CR13 disc and seat surface resists scoring from sand and silt particles, extending service life to 3 to 5 years in normal Indian water supply conditions. CR13 is the standard trim specification for Cast Iron foot valves in Indian municipal and irrigation projects.

For higher corrosion resistance — aggressive chemical service, seawater, treated effluent — specify the SS316 Foot Valve. See Stainless Steel Foot Valve page for full specifications.

Integrated Strainer — Design and Sizing

The strainer basket at the inlet of the foot valve is a perforated SS304 cylinder or basket — perforation size typically 3mm to 6mm — with a strainer open area of 2 to 3 times the pipe bore area. The large strainer area is critical: if the strainer area is too small relative to the pipe, suction losses across the clogged strainer will exceed the pump’s available NPSH (Net Positive Suction Head) and cause cavitation. A correctly sized strainer allows significant debris accumulation before cleaning is required without affecting pump performance.

Strainer cleaning interval: In clean water sources (municipal supply, HVAC closed-circuit tank), inspect annually. In open sumps, canals, and agricultural irrigation with high suspended solids, inspect monthly during peak season. The first indication of a fouled strainer is increased pump noise (cavitation) or reduced flow — do not wait for pump failure before inspecting the foot valve strainer.

Technical Specifications

Flanged vs Screwed End Foot Valves

Installation Guide

Position: Install at the very bottom of the suction pipe — the foot valve inlet must be submerged minimum 150mm to 300mm below the lowest expected water level in the sump or tank. If the foot valve is too close to the water surface, air entrainment will occur during pump operation, causing cavitation and loss of prime.

Orientation: Vertical installation only — inlet facing downward, outlet connecting upward to suction pipe. Never install horizontally — the disc will not close reliably under gravity when the pump stops.

Clearance from sump floor: Install minimum 200mm to 300mm above the sump floor — if too close to the bottom, silt and sediment will continuously block the strainer.

Flange gasket: Use appropriate gasket (rubber sheet or compressed fibre) between the foot valve flange and the suction pipe flange. Tighten bolts evenly to prevent flange face distortion.

First operation: After installation, manually fill the suction pipe with water through a priming port before starting the pump — on first start, the foot valve check will have no upstream pressure to hold it closed and requires priming assistance. Subsequently, the foot valve maintains prime automatically on pump stop.

Applications in Indian Industries

• Municipal water supply pumping stations — IS 14846 compliant CI CR13 foot valve — government and PWD tender supply — DN80 to DN300
• Agricultural irrigation systems — borewell with rising main, open channel suction pumps — CI CR13 flanged — seasonal supply for Gujarat, Rajasthan, Punjab, Maharashtra irrigation projects
• Fire fighting systems — IS 3844 fire pump suction — CI CR13 flanged Class 150 — underground tank suction line foot valve — DN80 to DN150
• HVAC cooling tower and chilled water systems — cooling tower basin suction pump — CI CR13 flanged — Ahmedabad, Mumbai, Pune commercial building projects
• Industrial water supply — process water sump pumps, cooling water intake, boiler feed water pre-treatment tank suction
• Mining and construction dewatering — sump pump suction in excavations, mines, and construction pits — CI CR13 robust enough for suspended solids-laden water
• Cooling towers — basin suction pump — CI CR13 DN80 to DN150 flanged
• Residential and commercial pumping — overhead tank and sump pump systems in apartments, hotels, and commercial complexes — DN40 to DN80

Related Products — Krishna Industries (KELOR)

• Stainless Steel Foot Valve (SS316) — for chemical, pharmaceutical, food, and high-purity water service where cast iron corrodes
• Single Plate Wafer Check Valve — install on pump discharge line alongside suction foot valve for complete pump backflow protection
• Y Strainer Valve — additional pipeline straining for process applications
• CI Wafer Check Valve — for discharge line and pipeline non-return valve applications

Frequently Asked Questions

1. What is a foot valve and how is it different from a check valve?

A foot valve is a check valve with an integrated strainer, installed at the bottom of the pump suction pipe — submerged in the water source. A regular check valve (wafer NRV, swing NRV) is installed in the middle of a pipeline without a strainer. The foot valve serves two purposes: preventing backflow to keep the pump primed, and straining debris to protect the pump. A regular NRV serves only the backflow prevention function.

2. Why is it called a foot valve?

Because it is installed at the “foot” — the bottom — of the suction pipe. It is always the lowest component in the suction line, submerged in the water source.

3. What is CR13 trim and why is it used?

CR13 is 13% Chromium stainless steel — harder and more corrosion resistant than plain cast iron, and more economical than full SS304 or SS316. In Indian water conditions with sand, silt, and dissolved minerals, CR13 disc and seat resist wear and scoring significantly better than plain CI trim, extending service life to 3–5 years vs 6–12 months for plain CI.

4. Do I need a foot valve for a submersible pump?

No — submersible pumps have a built-in check valve and are designed to operate submerged. Foot valves are for surface-mounted centrifugal pumps that draw water through a suction pipe from an open sump, tank, canal, or borewell with a rising main.

5. How deep should the foot valve be submerged?

Minimum 150mm to 300mm below the lowest expected water level. If the foot valve inlet is too close to the water surface, air entrainment causes cavitation. Maintain minimum 200mm clearance from the sump floor as well to prevent silt from blocking the strainer.

6. What size foot valve do I need?

Match the foot valve nominal size to the pump suction flange nominal size. DN80 (3″) foot valve for a pump with DN80 suction flange, and so on. Do not use a smaller foot valve than the suction pipe — increased suction velocity across the strainer reduces available NPSH and can cause cavitation.

7. Is this IS 14846 compliant?

Yes — CI CR13 flanged foot valves supplied by Krishna Industries comply with IS 14846, the Indian standard for foot valves. Test certificates and compliance documentation available on request for government and municipal tender submissions.

8. What is the MOQ?

MOQ is 10 Nos. Bulk project supply — 50 to 500+ Nos — handled with competitive pricing and fast dispatch from Ahmedabad.

Conclusion

The Cast Iron Foot Valve with CR13 trim supplied by Krishna Industries (KELOR) is the standard specification for Indian water supply, irrigation, fire fighting, HVAC, and municipal pump suction applications — CI ASTM A126 body — CR13 disc and seat — integrated SS304 strainer — flanged ANSI Class 150 / PN10 / PN16 — DN40 to DN300 — IS 14846 compliant — hydrostatic and seat leakage tested. Fast dispatch from Ahmedabad, GST invoice, IS 14846 test certificates for government tenders. WhatsApp size and quantity for bulk pricing within 2 hours.