ANSI 150 cast steel gate valve, 2" to 6"

A rising‑stem gate valve for isolation, with ANSI 150# flange ends, in 2" to 6" (DN50 to DN150). The body is Cast steel ASTM A216 WCB, rated 150 PSI, designed and manufactured to API 600 with ends to ASME B16.5 and inspection and testing to API 598.

Fully open, the gate lifts clear of the bore and the valve presents almost no restriction and almost no pressure drop. That is what a gate valve is for. It is not a throttling valve: held part‑open, flow across the partly‑raised gate vibrates it and erodes both gate and seat, and the damage is permanent. To regulate flow, use a globe valve.

• ⚠ Isolation only. Fully open or fully shut — never throttle a gate valve. A throttled gate eventually will not shut off at all.
• Built to API 600 — the standard for cast, bolted‑bonnet steel gate valves, and the heavier of the two API specifications in this range. If your specification says “gate valve to API 600”, this is the one.
• 425 °C, and the highest flanged test pressure here at 3.1 MPa. Steam and hot oil at 2" and above is exactly what this valve is for.
• ⚠ A216 WCB is carbon steel and does not resist corrosion. For aggressive fluids or wet, salty environments use SS316.
• ⚠ The specification box says 5"–6" but the valve is tabulated from 2". Two size bands are published, 2" to 4" and 5" and 6", with different dimension schemes. Both are below; the specification box describes only the larger one.
• Tested to 3.1 MPa shell and 2.2 MPa seal, with gas tightness at 0.6 MPa. Proof tests, not working pressures. The figures.

Four angles on the same valve. All photographs of the stocked item, not renders.

• The item numbers are the manufacturer’s, taken from the sectional drawing rather than renumbered 1 to 20. We publish them as printed so a spares order matches the drawing.
• Graphite packing is what allows the temperature rating. A gate valve seats metal to metal and packs the stem with graphite — no PTFE in the pressure boundary, which is why this range goes far past a ball valve.

• ⚠ Do not design to these. They are proof tests well above the working rating — the body or shell test proves the casting or forging, the seal test proves the gate against its seat.
• Inspected and tested to API 598, the standard common to all ten gate valve variants, which is what makes these figures comparable across the range. All ten.

Letters follow the manufacturer’s drawing. L is the face‑to‑face length and the figure that decides whether the valve drops into your run; H is the height with the stem risen. Where a letter is ambiguous we have left it exactly as published rather than guess at it.

• ⚠ Allow headroom above the height figure. This is a rising stem valve — the stem and handwheel travel up as it opens, and you need clearance above that plus room to turn the wheel.
• Measure the gap in the run against L, and on a replacement measure the valve coming out rather than trusting a drawing.

All ten, side by side: the comparison table. Other variants: ANSI 150 cast iron · ANSI 150 forged steel · ANSI 150 SS316 · JIS 10K cast iron · JIS 10K SS316 · Threaded forged steel · Threaded SS316 200 PSI · Threaded SS316 800 PSI · Weld end forged steel.

All gate valves · globe valves for throttling · ball valves for quarter‑turn isolation · flange end ball valves · swing check valves · Y‑strainers to keep grit off the seat · all low pressure valves.