A rising-stem gate valve for isolation, with Socket weld ends, 1/2″–2″ (DN15–DN50), in Forged steel ASTM A105. Rated 800 PSI, built to API 602 / BS 5352 and tested to API 598. Graphite packed — isolation duty only, never throttling.
Tell us the size, the fluid, pressure and temperature — quotes within 2 working hours.
| Ends | Socket weld |
|---|---|
| Size | 1/2″–2″ (DN15–DN50) |
| Body | Forged steel ASTM A105 |
| Pressure | 800 PSI |
| Max temperature | −29 to 425 °C |
| Design | API 602 / BS 5352 |
| Inspection | API 598 |
| Stem | Rising stem, handwheel, multi-turn |
| Packing | Graphite |
Isolation duty, Socket weld ends, built to API 602 / BS 5352.
A rising-stem gate valve in 1/2″–2″ (DN15–DN50), body in Forged steel ASTM A105, rated 800 PSI, inspected and tested 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.
For where a threaded joint is not acceptable — steam, high temperature, or a no-leak requirement. Permanent once welded.
Held part-open, flow across the partly-raised gate vibrates it and erodes both gate and seat — permanently. Use a globe valve to regulate flow.
Metal-to-metal seating and a graphite-packed stem, rather than a PTFE seat. That is why gate valves take steam and hot oil where a ball valve stops at 150 °C.
As published. We print the catalogue figure rather than inferring one from a sibling variant.
The stem travels up out of the bonnet as the valve opens, so it needs more headroom open than closed. Handwheel operated — not a quarter turn.
The one standard common to every variant in this range, which is what makes their test pressures directly comparable.
The end type is the first decision and cannot be changed later. Check it against the pipework, not the pressure rating — all ten variants compared.
All photographs of the stocked item, not renders.
A rising-stem gate valve with the handwheel fitted. The stem you see above the bonnet is what travels as the valve opens — allow for it when you check headroom.
The end connection is the first thing to check against your pipework, and the one thing that cannot be changed after ordering.
Where the graphite packing sits. A small re-tighten of the gland after the first heat cycle is normal, not a fault.
Everything that goes on a purchase order.
| Item | Detail |
|---|---|
| Size range | 1/2″ to 2″ (DN15 to DN50) |
| End type | Socket weld — to ASME socket weld |
| Body material | Forged steel ASTM A105 |
| Working pressure | 800 PSI |
| Maximum working temperature | −29 °C to 425 °C |
| Design and manufacture | API 602 / BS 5352 |
| Inspection and test | API 598 |
| Shell or body test | 21.0 MPa |
| Seal test | 15.4 MPa |
| Gas tightness test | 0.6 MPa |
| Stem | Rising stem, handwheel operated, multi-turn |
| Packing | Graphite |
| Duty | Isolation only — never for throttling. For throttling use globe valves |
| Stock | Singapore & Malaysia warehouses — out within 24 hours |
Millimetres. Face-to-face L is the gap the valve needs in the run; on a rising-stem gate valve you also need headroom above it, because the stem travels up as it opens.
| Size | Bore d | A | Height H | Handwheel W | Face-to-face L | B |
|---|---|---|---|---|---|---|
| 1/2″ | 10.3 | 21.8 | 145 | 100 | 79 | 9.6 |
| 3/4″ | 13.5 | 27.1 | 145 | 100 | 92 | 12.7 |
| 1″ | 18 | 33.8 | 170 | 125 | 111 | 12.7 |
| 1 1/4″ | 23 | 42.6 | 190 | 160 | 120 | 12.7 |
| 1 1/2″ | 29 | 48.7 | 215 | 160 | 120 | 12.7 |
| 2″ | 36 | 61.2 | 240 | 180 | 140 | 12.7 |
This is a rising stem: the stem travels up out of the bonnet as the valve opens, so the space it needs open is greater than its closed height. Check the clearance before fitting it under a platform or in a duct.
Measure the gap in the run against it. On a replacement, measure the valve coming out rather than trusting a drawing — and remember a globe valve of the same size is longer.
Where a letter is ambiguous or mislabelled in the catalogue we say so rather than guess at what was meant.
A valve must not hang on the pipework, and must never be used to pull a misaligned joint together.
Socket weld — the end type is the first decision and cannot be changed after ordering.
Seventeen callouts, and seventeen items in the parts list below — the two match one for one. The dimension letters are the column headings in the size table above: d bore, A socket bore, B socket depth, L face-to-face, H height when open and W handwheel.
Callout numbers are the item numbers in the parts list below, and the dimension letters are the column headings in the size table above. Nothing on the drawing is named only there.
It sits clear of the bore when the valve is open. That is the gate valve's advantage — almost no restriction — and the reason it must not be held half open, because flow past a partly raised wedge erodes both faces.
This is a catalogue section, not a manufacturing drawing: no tolerances and no material callouts. Order spares by the item numbers in the parts list.
The manufacturer’s item numbers, so a spares order matches the parts list.
| No | Part name | Material |
|---|---|---|
| 1 | Body | ASTM A105 |
| 2 | Seat | ASTM A276 410 + STL |
| 3 | Wedge | ASTM A276 420 |
| 4 | Stem | ASTM F182 F6A |
| 5 | Gasket | SS304 + Graphite |
| 6 | Bonnet | ASTM A105 |
| 7 | Bonnet Nut | ASTM A194 2H |
| 8 | Bonnet Bolt | ASTM A193 B7 |
| 9 | Packing | Graphite |
| 10 | Pin | ASTM A307-A |
| 11 | Gland | ASTM A276 410 |
| 12 | Gland Flange | ASTM A105 |
| 13 | Gland Bolt | ASTM A193 B7 |
| 14 | Gland Nut | ASTM A194 2H |
| 15 | Yoke Sleeve | ASTM A276 410 |
| 16 | Lock Nut | Carbon Steel |
| 17 | Handwheel | ASTM A197 |
They match the callouts on the sectional drawing, so a spares order matches the section rather than a description.
Everything else is a casting or a fastener. On an isolation valve those two surfaces take the duty every time it is closed.
It is also the part that beds in. A small re-tighten of the gland after the first heat cycle is normal.
A bent or scored stem is the usual reason a gate valve will not seat, and it is the part that moves furthest every cycle.
If you need to know what touches your fluid, the whole list is above — we have not summarised it.
Factory proof tests. Not working pressures — the shell test proves the body, the seal test proves the gate against its seat. Do not design to them.
| Item | Value |
|---|---|
| Nominal Pressure | 800 PSI |
| Shell Test Pressure | 21.0 MPa |
| Seal Test | 15.4 MPa |
| Gas-Tightness Test | 0.6 MPa |
| Max working temperature | −29 °C to 425 °C |
The shell test proves the body and the seal test proves the gate against its seat. They are proof tests well above the working rating, and the valve is not intended to operate there.
That is the number to design to, at −29 to 425 °C.
Every variant in this range is inspected and tested to it, so the figures on the other nine pages can be read against these directly.
It is being run part-open. Throttling on the gate face erodes gate and seat permanently, and a wrecked seat will not shut off when you need it.
EN 10204 3.1 is available on request and the castings carry heat numbers — ask with the order, not after the goods arrive.
End type first, then the standard, then the material.
All ten side by side: the comparison table.
Isolation — fully open or fully shut. A rising-stem gate valve with Socket weld ends in 1/2″–2″ (DN15–DN50), body in Forged steel ASTM A105, rated 800 PSI, built to API 602 / BS 5352 and tested to API 598. Fully open it presents almost no restriction and almost no pressure drop.
No. Held part-open, flow across the partly-raised gate vibrates it and erodes both gate and seat — and the damage is permanent. A wrecked seat cannot be relied on to shut off. Use a globe valve to regulate flow.
Rated −29 to 425 °C, as published. The packing is graphite and the seating is metal to metal, which is what allows the heat — a PTFE-seated ball valve stops at 150 °C.
1/2″–2″ (DN15–DN50). Part numbers, the bill of materials and the test pressures are all on this page, as printed in the catalogue.
More than its closed height. This is a rising stem: the stem travels up out of the bonnet as the valve opens. Check the clearance before fitting it under a platform or in a duct.
We hold it in our Singapore and Malaysia warehouses, out of the warehouse within 24 hours of PO. Quotes within 2 working hours.
A gate valve isolates: fully open or fully shut. A globe valve throttles — it is built to run part-open, which a gate valve is destroyed by. If the valve will ever be adjusted, it must be a globe valve. Note the globe is also longer face-to-face, so the two are not interchangeable in the run.
Designed and manufactured to API 602 / BS 5352, and inspected and tested to API 598. API 598 is the common thread across all ten variants, which is what makes their test pressures directly comparable.
It is handwheel operated and multi-turn, not quarter turn. Operating torque, the number of turns and any ISO 5211 pad are not published for this range — settle the actuation arrangement with us rather than assuming a top plate.
No Cv, no operating torque or turn count, no ISO 5211 pad, and no fire-safe certificate. EN 10204 3.1 certificates are available on request and the castings carry heat numbers. Anything the catalogue does not state we get from the factory rather than infer from a sibling variant.
Related: all gate valves · globe valves · ball valves · all low pressure valves
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