Direct answer · Updated August 2026
Who manufactures ISI marked gunmetal gate valves in India?
Supreme Valves India (Ahmedabad) manufactures and exports ISI marked gunmetal (bronze) gate valves to IS:778 — cast gunmetal IS:318 LTB-2 body & wedge, high tensile brass stem, cast iron hand wheel, screwed female BSP ends, sizes 1/2" to 4" (15–100 mm), Class-1 & Class-2 tested. RFQ: +91 97732 78770.
Key Facts — At a Glance
| Product | Gunmetal gate valve, full-bore, non-rising stem |
| Standard | IS 778 (ISI marked) |
| Body & Wedge | Gunmetal (leaded tin bronze), IS 318 LTB-2 |
| Stem | High tensile brass, IS 6912 |
| Hand Wheel | Cast iron, IS 210 FG 200 |
| Ends | Screwed female BSP |
| Size Range | 1/2" to 4" (15–100 mm) |
| Test Pressure | Body 15/24 kg/cm², Seat 10/16 kg/cm² (Class-1/Class-2) |
| Applications | Water supply, compressed air, fire lines, HVAC, general service |
| Manufacturer | Supreme Valves India, Ahmedabad — export worldwide |
Product Gallery
Actual production photographs of our ISI marked gunmetal gate valve range — 1/2" to 4", showing the cast gunmetal body, solid wedge, IS:778 / ISI markings and cast iron hand wheel.
Product Videos
Applications
Water Supply & Plumbing
Isolation on domestic and building water lines, pumping sets and distribution headers.
Compressed Air Lines
Shut-off on workshop and plant air lines where full-bore, low pressure drop matters.
Fire & Hydrant Lines
Reliable isolation duty on fire-fighting and hydrant service pipework.
HVAC & Utilities
Chilled water, hot water and general utility isolation in building services.
Test Pressures
| Test | Class-1 | Class-2 |
|---|---|---|
| Body (Hydraulic) | 1.5 MPa (15 kg/cm²) | 2.4 MPa (24 kg/cm²) |
| Seat & Back Seat | 1.0 MPa (10 kg/cm²) | 1.6 MPa (16 kg/cm²) |
Dimensions (mm)
| Size (inch) | Size (mm) | End (A) | L | H | W |
|---|---|---|---|---|---|
| 1/2" | 15 | 1/2" BSP | 60 | 109 | 53 |
| 3/4" | 20 | 3/4" BSP | 60 | 113 | 66 |
| 1" | 25 | 1" BSP | 70 | 130 | 66 |
| 1-1/4" | 32 | 1-1/4" BSP | 80 | 145 | 75 |
| 1-1/2" | 40 | 1-1/2" BSP | 90 | 162 | 85 |
| 2" | 50 | 2" BSP | 100 | 189 | 92 |
| 2-1/2" | 65 | 2-1/2" BSP | 105 | 225 | 127 |
| 3" | 80 | 3" BSP | 125 | 262 | 127 |
| 4" | 100 | 4" BSP | 160 | 311 | 188 |
L = face-to-face, H = overall height (valve open), W = hand wheel diameter. All ends screwed female BSP.
Material of Construction
| Part No. | Part Name | Material | Specification |
|---|---|---|---|
| 1 | Body | Gun Metal | IS:318 LTB-2 |
| 2 | Wedge | Gun Metal | IS:318 LTB-2 |
| 3 | Stem | High Tensile Brass | IS:6912 FLB |
| 4 | Bonnet | Gun Metal | IS:318 LTB-2 |
| 5 | Stuffing Box | Gun Metal | IS:318 LTB-2 |
| 6 | Gland Packing | PTFE / Asbestos | IS:4687 / PTFE |
| 7 | Gland | Gun Metal | IS:318 LTB-2 |
| 8 | Gland Nut | Gun Metal | IS:318 LTB-2 |
| 9 | Hand Wheel | Cast Iron | IS:210 FG 200 |
| 10 | Washer | Mild Steel | M.S. |
| 11 | Screw | Mild Steel | M.S. |
Request Gunmetal Gate Valve Quote
Send size, quantity, class (1 or 2) and destination. Engineering response within 24 hours.
Or call +91 97732 78770 · info@supremevalves.in
How to Select the Right Gunmetal Gate Valve
- Match the pipe size. Select the valve size to your pipe bore, from 1/2" (15 mm) to 4" (100 mm). Ends are BSP screwed female.
- Pick the pressure class. Choose Class-1 (body tested to 15 kg/cm²) for normal water and air, or Class-2 (24 kg/cm²) for higher-pressure lines.
- Confirm the thread. Standard ends are BSP. Specify NPT at enquiry if your pipework uses NPT — BSP and NPT are not interchangeable.
- Check the certification. Verify the ISI mark, IS 778 standard and IS 318 LTB-2 gunmetal grade for assured quality.
- Request documentation. Ask for the ISI marking and material / test certificate (MTC) with your order.
Frequently Asked Questions
What is a gunmetal gate valve?
A gunmetal gate valve has a cast gunmetal (leaded tin bronze, IS:318 LTB-2) body and wedge with a full-bore opening for on/off isolation of water, air and general services. It is ISI marked to IS:778 with screwed female BSP ends.
What sizes are available?
Sizes range from 1/2" (15 mm) to 4" (100 mm) with BSP screwed female ends, ISI marked to IS:778.
What are the test pressures?
Class-1: body 1.5 MPa (15 kg/cm²), seat & back seat 1.0 MPa (10 kg/cm²). Class-2: body 2.4 MPa (24 kg/cm²), seat & back seat 1.6 MPa (16 kg/cm²).
What is gunmetal made of?
Gunmetal is a leaded tin bronze (copper-tin-zinc-lead) to IS 318 Grade LTB-2 — corrosion-resistant, pressure-tight and easy to cast, ideal for water and general-service valve bodies.
What is the difference between a gunmetal and a brass gate valve?
Gunmetal (IS 318 LTB-2) has tin and lead for better corrosion resistance and pressure integrity than plain brass, so it is preferred for potable water, marine and long-service isolation. The stem is high tensile brass (IS 6912).
What does the ISI mark and IS 778 mean?
The ISI mark is Bureau of Indian Standards certification. IS 778 is the standard for copper-alloy gate, globe and check valves; IS 318 LTB-2 is the gunmetal material grade.
Is a gunmetal gate valve suitable for drinking water?
Yes — gunmetal resists corrosion and dezincification and is widely used for potable water isolation on supply, plumbing and pumping lines.
What is the difference between Class-1 and Class-2?
Class-1 body is tested to 15 kg/cm² (seat 10 kg/cm²); Class-2 body to 24 kg/cm² (seat 16 kg/cm²). Choose Class-2 for higher-pressure lines.
Are the BSP threaded ends compatible with NPT?
No. Standard ends are BSP; BSP and NPT are not interchangeable. Use an adaptor or specify NPT at enquiry.
Who manufactures ISI gunmetal gate valves and what is the price?
Supreme Valves India (Supreme Enterprise), Ahmedabad. Indicative price roughly INR 350 (1/2") to INR 9,500 (4") ex-works; send sizes and quantity for a firm quote. RFQ: +91 97732 78770.