Threaded forged steel globe valve, ½" to 2"

A rising‑stem globe valve for throttling and isolation, in ½" to 2" (DN15 to DN50), with NPT threaded ends and a body in Forged steel ASTM A105. Rated 800 PSI, designed and manufactured to API 602 and BS 5352, inspected and tested to API 598.

Inside, flow turns up through a seat opening, past a disc that lifts squarely off the seat, and turns down again. The stem moves the disc towards or away from the seat, so the gap changes smoothly with stem position and a flow can be set and held. That is the job a gate valve cannot do — a gate parked part open vibrates and wears its seat. The cost is pressure drop even fully open, because the path turns twice. Globe against gate.

• The seat is Stellite faced and part of the body. Item 1 reads ASTM A105 + STL. Stellite is a cobalt‑chrome hardfacing that resists the erosion a throttling valve suffers, because flow through a narrow gap is fast. It is also not renewable — there is no seat ring to change.
• 800 PSI, and 21.0 MPa on shell test. Ten times the shell test of the 200 PSI stainless version. If your line pressure is anywhere near the top of a low‑pressure range, this is the body to use.
• NPT only. No BSPT option on this variant. If your pipework is BSPT, the 200 PSI SS316 valve offers both thread forms — at a quarter of the pressure.
• Same forging as the socket weld valve, with a different end. Identical 16‑item parts list, identical 800 PSI rating. Choose threaded if the joint has to come apart, socket weld if it must not.
• ⚠ Take a wrench on the body flats, not the bonnet. Tightening a taper thread puts real torque into the valve. Loading it through the bonnet bolts can lift the gland and start a stem leak that only shows up under pressure.

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

The manufacturer’s sectional drawing. The callout numbers correspond to the item numbers in the parts list.

• The item numbers are the manufacturer’s. They are the callout numbers from the sectional drawing, which is why a number can repeat a part name at a different position. We have left them exactly as published so a spares order matches the drawing.
• The seating surfaces are what wear. On a valve that runs part open, flow through the gap is fast, and the disc face and seat take that. They are the parts to ask about first.
• Everything here is published, not on request. If you need to know what touches your fluid, the whole list is above.

• ⚠ Do not design to these figures. They are manufacturing proof tests well above the working rating — the shell test proves the body, the seal test proves the disc against its seat. The valve is not intended to operate there.
• Gas tightness is 0.6 MPa, the same figure across all ten variants in this range. It is the one number that does not move with class, size or material.
• The temperature ceiling is the material, not a seat insert. A globe valve seals metal to metal and packs the stem with graphite, which is why the steel variants here reach 425 °C where a PTFE‑seated ball valve stops at 150. All ten compared.

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

All globe valves · gate valves for straight‑through isolation · ball valves for quarter‑turn · flange end ball valves · swing check valves · Y‑strainers to keep grit off the seat · needle valves for fine control at pressure · all low pressure valves.