Rising-stem throttling valves in ten variants — flanged ANSI 150 and JIS 10K, threaded NPT and BSPT, and socket weld — in cast iron, cast steel, forged steel A105 or SS316. Unlike a gate valve, a globe valve is designed to run part-open. That is the whole reason to choose one.
DN15 to DN150 across the range — the limits differ by variant.
Built to run part-open — the job a gate valve cannot do.
Most variants, graphite packed. Three depart from it — see the temperature table.
The highest here, on the threaded and weld ends, not the flanged ones.
Tell us the size, the end type and flange standard, the fluid, pressure and temperature — quotes within 2 working hours.
Each has its own page with the full bill of materials, every dimension and its test pressures.
Regulating flow — the job a gate valve cannot do.
In a globe valve the flow turns. It comes up through a seat opening, past a disc that lifts squarely off that seat, and turns down again to leave. The stem moves the disc towards or away from the seat rather than sliding a gate across the bore, and that geometry is what makes the valve controllable: the gap between disc and seat changes smoothly and predictably with stem position, so flow can be set and held anywhere between shut and fully open.
The cost is pressure drop. Because the path turns twice, a globe valve restricts the line even fully open, where a gate valve presents a clear bore. So the two are not alternatives — they do different jobs.
Two of the ten, side by side. Look at the same S-shaped path in both: the disc lifts straight off its seat, which is what lets a globe valve be held part open — and also where its pressure drop comes from. Every variant page carries its own sectional drawing, with a bill of materials whose numbers match it one for one.
Running it part-open is normal service, not abuse. A gate valve held part-open erodes its own seat permanently; a globe valve is built for it.
A globe valve is physically longer face-to-face at the same size — at 2″ in cast steel, 203 mm against 178 mm. It will not fit the gap a gate valve came out of.
The turning flow path is the price of control. If you need isolation with minimal restriction, that is a gate valve; if you need fast on-off, a ball valve.
Graphite packing and metal seating, well past the 150 °C of a PTFE-seated ball valve. Three variants depart from it — see the temperature table.
ANSI 150 and JIS 10K will not bolt to each other despite similar ratings. Check the pipework, not the pressure.
Unless the manufacturer says otherwise — flow entering beneath the disc. It makes the valve easier to open against pressure and keeps the packing out of the throttling stream.
The most common question on this page, and the answer is not price.
| Globe valve | Gate valve | |
|---|---|---|
| Job | Throttling and isolation | Isolation only |
| Run part-open? | Yes — that is the point | Never — it destroys the seat |
| Flow path | Turns twice, past a seat | Straight through |
| Pressure drop, fully open | Significant | Almost none |
| Face-to-face at 2″, cast steel | 203 mm | 178 mm |
| Interchangeable in the pipe? | ⚠ No — 25 mm longer at 2″ | ⚠ No — a globe will not fit its gap |
| Stem travel | Short | Long — the gate must clear the bore |
| Frequent operation | Suits it | Better left alone between duties |
| Temperature, most variants | 425 °C | 425 °C |
| Highest pressure here | 800 PSI threaded / weld | 800 PSI threaded / weld |
Replacing a gate valve with a globe valve of the same nominal size will not fit — at 2″ you need 25 mm more in the run. Measure before ordering.
Not a preference — a gate valve used for regulation will fail, and then it will not isolate either.
A gate valve is the better buy: cheaper, and almost no pressure drop.
Neither — a ball valve is a quarter turn against many turns for both of these. But a ball valve stops at 150 °C and cannot throttle.
In this range — so once the job is settled, the rest of the choice runs the same way.
End type first, then standard, then material.
| Variant | End | Size | Material | Pressure | Max temp | Choose it when… |
|---|---|---|---|---|---|---|
| ANSI 150 cast iron | ANSI 150# flange | 2″–6″ | Cast iron | 150# | ≤ 205 °C | Throttling water — lowest cost |
| ANSI 150 cast steel | ANSI 150# flange | 2″–6″ | Cast steel | Class 150 | 425–429 °C | Steam and hot oil, larger sizes — BS 1873 |
| ANSI 150 forged steel | ANSI 150# flange | 1″–1½″ | Forged A105 | 150# | −29 to 425 °C | Small-bore flanged — forged, API 602 |
| ANSI 150 SS316 | ANSI 150# flange | 1″–4″ | SS316 | 150 PSI | 425 °C | Corrosive on ANSI — two size bands |
| JIS 10K cast iron | JIS 10K flange | 2″–6″ | Cast iron | 10K | 230 °C | Japanese pipework — JIS F7307, not API 598 |
| JIS 10K SS316 | JIS 10K flange | 1″–4″ | SS316 | 10K | −29 to 425 °C | Corrosive on JIS — genuine JIS dimensions |
| Threaded forged steel | NPT | 1/2″–2″ | Forged A105 | 800 PSI | −29 to 425 °C | Small bore, high pressure — 800 PSI screwed |
| Threaded SS316, 200 PSI | BSPT or NPT | 1/2″–2″ | SS316 | 200 PSI | 150 °C | Light corrosive — BSPT, 150 °C only |
| Threaded SS316, 800 PSI | NPT only | 1/2″–2″ | SS316 | 800 PSI | 200 °C | Corrosive at pressure — NPT only, 200 °C |
| Weld end forged steel | Socket weld | 1/2″–2″ | Forged A105 | 800 PSI | −29 to 425 °C | A threaded joint is not acceptable |
Rated 230 °C and built and tested to the JIS F7307 / F7400 marine standards, as the catalogue states — the other variants are tested to API 598. Treat 230 °C as the governing figure for that valve.
The threaded SS316 800 PSI is rated 200 °C, and the ANSI 150 cast steel states 425 °C on the 2″–4″ band and 429 on the 2½″ band — design to 425 °C. Both as the catalogue prints them.
800 PSI against 150 PSI flanged — a small forged body takes far more than a large cast one. The trade is size: forged stops at 2″.
Despite both sitting near 1.6–2 MPa. Match the bolt circle on the pipework.
Ten manufacturer catalogues, one per variant. All AF Hydro PDFs, as printed.
Dimensions and part numbers per variant are in the catalogues, as printed; stock and price are not — send us the list and we will confirm both.
At 2″ in cast steel, 203 mm against 178 mm. Replacing a gate valve with a globe valve of the same nominal size will not fit without modifying the run.
Flow entering beneath the disc, unless the manufacturer says otherwise. It makes the valve easier to open against pressure and keeps the packing out of the throttling stream. The arrow on the body shows the direction.
ANSI 150 and JIS 10K sit at similar ratings and will not bolt to each other. And mind the threaded ones: BSPT on the 200 PSI, NPT only on the 800 PSI.
Rising stem, so the stem travels up out of the bonnet as it opens — though the travel is shorter than a gate valve's, because the disc does not have to clear the bore.
A valve must not hang on the pipework, and must never be used to pull a misaligned flange together. This matters more again on cast iron, which is brittle.
Graphite packing beds in. A small re-tighten of the gland once the line reaches working temperature is normal, not a sign of failure.
The catalogues are thorough on dimensions and test pressures, and silent on a few things people ask about regularly. We say which — we do not guess, and we do not borrow figures from another variant.
| Not published | What it means for you |
|---|---|
| Flow characteristic and Cv | This bites hardest on a globe valve, because it is the throttling valve. The catalogues publish neither a Cv nor a characteristic curve — so the relationship between stem position and flow rate cannot be calculated from the data sheet. If the regulation has to be precise, say so and we will ask the factory. |
| Disc type | Plug, parabolic or flat — not stated. The disc shape is what decides how smoothly the valve regulates at small openings. Ask before ordering if you are relying on control below 20% open. |
| Operating torque and number of turns | Not published. These are multi-turn — if the valve is to be actuated, or adjusted often by hand, ask before ordering. |
| ISO 5211 actuator pad | Not published across this range. These globe valves are handwheel operated — settle the actuation arrangement with us rather than assuming a top plate. |
| Fire-safe certification | Not claimed. What we can state: metal seating and graphite packing, which is the reason this range reaches 425 °C — but that is not a fire-safe certificate. |
| ⚠ The JIS 10K cast iron test regime | That variant is built and tested to JIS F7307 / F7400, not API 598 like the other nine. Its figures are therefore not directly comparable with the rest of this page. We set it alongside them as printed rather than harmonising it. |
| EN 10204 3.1 certificates | Available on request; the castings carry heat numbers. Ask with the order, not after the goods arrive. |
⚠ One published figure that disagrees with itself: ANSI 150 cast steel states 425 °C on the 2″–4″ band and 429 °C on the 2½″ band — the same valve, two figures. Design to 425 °C. We publish both as printed rather than quietly picking one.
Regulating flow — the job a gate valve cannot do. In a globe valve the flow turns: up through a seat opening, past a disc that lifts squarely off that seat, and down again to leave. The stem moves the disc towards or away from the seat, and that geometry is what makes the valve controllable — the gap changes smoothly and predictably with stem position.
The job. A globe valve throttles and can also shut off; a gate valve isolates only and must never be run part-open. A globe valve is built to run part-open — that is the point — whereas a gate valve held part-open destroys its own seat permanently. The cost is that a globe valve gives a pressure drop even fully open, because the flow path turns twice.
No. A globe valve is longer face-to-face at the same size — at 2″ in cast steel, 203 mm against 178 mm for the gate. You need 25 mm more in the run at 2″. Measure before ordering; this is the trap that comes up most often on this page.
Ten. Six flanged — ANSI 150 in cast iron, cast steel, forged steel and SS316, plus JIS 10K in cast iron and SS316 — three threaded, and one socket weld. The range runs 1/2″ to 6″.
Because it seals on metal and graphite rather than PTFE. Most of this range is rated 425 °C; a PTFE-seated ball valve stops at 150 °C. That is why globe valves are used to regulate steam and hot oil.
No. Both sit near 1.6 to 2 MPa and their bolt circles differ. Check the flange on the pipework, not the pressure.
Install it flow-under-the-seat unless the manufacturer says otherwise — flow entering beneath the disc. It makes the valve easier to open against pressure and keeps the packing out of the throttling stream. The arrow on the body shows the direction.
Three. JIS 10K cast iron is rated 230 °C and built to the JIS F7307 / F7400 marine standards — the only variant not tested to API 598. Threaded SS316 800 PSI is rated 200 °C. And threaded SS316 200 PSI is held to 150 °C. All as printed.
Note the difference: the 200 PSI offers BSPT or NPT, while the 800 PSI is NPT only. And that is BSPT, the tapered form — not BSPP. The threaded forged steel is NPT.
We hold it in our Singapore and Malaysia warehouses, out of the warehouse within 24 hours of PO. Quotes within 2 working hours. Send the size, end type and flange standard, fluid, pressure and temperature.
Related: gate valves · low pressure ball valves · butterfly valves · swing check valves · all low pressure valves · our videos on YouTube.
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