Gate Valves Β· Forged Steel Gate Valves
Compact Forged Gate Valves
The compact forged gate valve is the small-bore, high-pressure execution of the gate family: a forged body built to API 602, in bolted-bonnet and pressure-seal-bonnet designs, covering NPS 1/2 to 2 at ASME Class 150 through 4500. The benchmark page spans carbon steel, low-temperature steel, stainless steel, alloy steel, duplex stainless steel, nickel-base and titanium-alloy bodies, with RF, BW, RTJ, SW and NPT ends and manual, pneumatic, electric or hydraulic operation.
Part of the Forged Steel Gate Valves family
Last updated: 2026-11
Specifications
| size range | NPS 1/2"~2" (DN15~DN50) |
|---|---|
| pressure class | ASME CLASS 150~4500 (PN16~PN760) |
| body materials | Carbon steel, Low-temperature steel, Stainless steel, Alloy steel, Duplex stainless steel, Nickel base, Titanium alloy steel |
| end connections | RF, BW, RTJ, SW, NPT |
| operation | Manual, Pneumatic, Electric, Hydraulic |
| end to end class900 1500 pressure seal | NPS 1/2: 120 mm | NPS 3/4: 120 mm | NPS 1: 140 mm | NPS 1-1/4: 178 mm | NPS 1-1/2: 178 mm | NPS 2: 216 mm (end-to-end length, Class 900/1500 pressure seal bonnet, regular port size, full port one size smaller) |
| bore diameter class900 1500 pressure seal | NPS 1/2: 9.5 mm | NPS 3/4: 12.7 mm | NPS 1: 16 mm | NPS 1-1/4: 27 mm | NPS 1-1/2: 27 mm | NPS 2: 35 mm (bore diameter, Class 900/1500 pressure seal bonnet, regular port size, full port one size smaller) |
| weight class900 1500 pressure seal | NPS 1/2: 3.8 kg | NPS 3/4: 5.3 kg | NPS 1: 8.3 kg | NPS 1-1/4: 12.8 kg | NPS 1-1/2: 12.8 kg | NPS 2: 21.8 kg (approx. weight, Class 900/1500 pressure seal bonnet, regular port size, full port one size smaller) |
| end to end class2500 welded | NPS 1/2: 178 mm | NPS 3/4: 178 mm | NPS 1: 186 mm | NPS 1-1/4: 232 mm | NPS 1-1/2: 232 mm | NPS 2: 279 mm (end-to-end length, Class 2500 welded bonnet, ASME B16.34, regular port size, full port one size smaller) |
| bore diameter class2500 welded | NPS 1/2: 9.0 mm | NPS 3/4: 12.0 mm | NPS 1: 15 mm | NPS 1-1/4: 27 mm | NPS 1-1/2: 27 mm | NPS 2: 35 mm (bore diameter, Class 2500 welded bonnet, ASME B16.34, regular port size, full port one size smaller) |
| weight class2500 welded | NPS 1/2: 8.0 kg | NPS 3/4: 8.0 kg | NPS 1: 11 kg | NPS 1-1/4: 20 kg | NPS 1-1/2: 20 kg | NPS 2: 25 kg (approx. weight, Class 2500 welded bonnet, ASME B16.34, regular port size, full port one size smaller) |
| end to end class2500 pressure seal | NPS 1/2: 178 mm | NPS 3/4: 178 mm | NPS 1: 186 mm | NPS 1-1/4: 232 mm | NPS 1-1/2: 232 mm | NPS 2: 279 mm (end-to-end length, Class 2500 pressure seal bonnet, ASME B16.34, regular port size, full port one size smaller) |
| bore diameter class2500 pressure seal | NPS 1/2: 9.0 mm | NPS 3/4: 12.0 mm | NPS 1: 15 mm | NPS 1-1/4: 27 mm | NPS 1-1/2: 27 mm | NPS 2: 35 mm (bore diameter, Class 2500 pressure seal bonnet, ASME B16.34, regular port size, full port one size smaller) |
| weight class2500 pressure seal | NPS 3/4: 10.0 kg | NPS 1: 13 kg | NPS 1-1/4: 21.8 kg | NPS 1-1/2: 21.8 kg | NPS 2: 28 kg (approx. weight, Class 2500 pressure seal bonnet, ASME B16.34; NPS 1/2 column excluded, kg/lb inconsistent in source; regular port size, full port one size smaller) |
| end to end class800 bolted | NPS 1/4: 79 mm | NPS 3/8: 79 mm | NPS 1/2: 79 mm | NPS 3/4: 92 mm | NPS 1: 111 mm | NPS 1-1/4: 120 mm | NPS 1-1/2: 120 mm | NPS 2: 140 mm (end-to-end length, Class 800 bolted bonnet, full port size, threaded and socket weld ends, ASME B16.34/API 602) |
| bore diameter class800 bolted | NPS 1/4: 7.5 mm | NPS 3/8: 10 mm | NPS 1/2: 13 mm | NPS 3/4: 13 mm | NPS 1: 18 mm | NPS 1-1/4: 24 mm | NPS 1-1/2: 29 mm | NPS 2: 36.5 mm (bore diameter, Class 800 bolted bonnet, full port size, threaded and socket weld ends) |
| end to end class150 flanged | NPS 1/2: 108 mm | NPS 3/4: 117 mm | NPS 1: 127 mm | NPS 1-1/2: 165 mm | NPS 2: 178 mm (end-to-end length, Class 150 flanged, bolted bonnet, regular port, ASME B16.10) |
| end to end class300 flanged | NPS 1/2: 140 mm | NPS 3/4: 152 mm | NPS 1: 165 mm | NPS 1-1/2: 190 mm | NPS 2: 216 mm (end-to-end length, Class 300 flanged, bolted bonnet, regular port, ASME B16.10) |
| end to end class600 flanged | NPS 1/2: 165 mm | NPS 3/4: 190 mm | NPS 1: 216 mm | NPS 1-1/2: 241 mm | NPS 2: 292 mm (end-to-end length, Class 600 flanged, bolted bonnet, regular port, ASME B16.10) |
| bore diameter class150 300 600 flanged | NPS 1/2: 10 mm | NPS 3/4: 12.2 mm | NPS 1: 18 mm | NPS 1-1/2: 29 mm | NPS 2: 37 mm (bore diameter, Class 150-300-600 flanged, bolted bonnet, regular port) |
| end to end class800 welded | NPS 3/8: 76 mm | NPS 1/2: 76 mm | NPS 3/4: 86 mm | NPS 1: 102 mm | NPS 1-1/4: 118 mm | NPS 1-1/2: 118 mm | NPS 2: 132 mm (end-to-end length, Class 800 welded bonnet, regular port size, full port one size smaller) |
| bore diameter class800 welded | NPS 3/8: 9.5 mm | NPS 1/2: 9.5 mm | NPS 3/4: 12.7 mm | NPS 1: 17.5 mm | NPS 1-1/4: 23.8 mm | NPS 1-1/2: 28.6 mm | NPS 2: 36.5 mm (bore diameter, Class 800 welded bonnet, regular port size, full port one size smaller) |
| weight class800 welded | NPS 3/8: 1.5 kg | NPS 1/2: 1.5 kg | NPS 3/4: 2.0 kg | NPS 1: 3.0 kg | NPS 1-1/4: 4.0 kg | NPS 1-1/2: 5.5 kg | NPS 2: 7.5 kg (approx weight, Class 800 welded bonnet, regular port size, full port one size smaller) |
| end to end class900 1500 bolted or welded | NPS 3/8: 90 mm | NPS 1/2: 90 mm | NPS 3/4: 104 mm | NPS 1: 120 mm | NPS 1-1/4: 130 mm | NPS 1-1/2: 130 mm | NPS 2: 150 mm (end-to-end length, Class 900/1500 bolted or welded bonnet, regular port size, full port one size smaller) |
| bore diameter class900 1500 bolted or welded | NPS 3/8: 6.5 mm | NPS 3/4: 12.7 mm | NPS 1: 16 mm | NPS 1-1/4: 22.5 mm | NPS 1-1/2: 27 mm | NPS 2: 35 mm (bore diameter, Class 900/1500 bolted or welded bonnet, regular port size, full port one size smaller; NPS 1/2 (regular port) omitted - printed mm/in pair inconsistent in source) |
| weight class900 1500 bolted or welded | NPS 3/8: 2.5 kg | NPS 1/2: 2.5 kg | NPS 3/4: 3.5 kg | NPS 1: 5.5 kg | NPS 1-1/4: 8.0 kg | NPS 1-1/2: 8.5 kg | NPS 2: 14.5 kg (approx weight, Class 900/1500 bolted or welded bonnet, regular port size, full port one size smaller) |
| center to top open class800 bolted | NPS 1/4: 157 mm | NPS 3/8: 157 mm | NPS 1/2: 157 mm | NPS 3/4: 157 mm | NPS 1: 185 mm | NPS 1-1/4: 226 mm | NPS 1-1/2: 241 mm | NPS 2: 273 mm (center-to-top (open) height, Class 800 bolted bonnet, full port size, threaded and socket weld ends, ASME B16.34/API 602) |
| center to top open class150 300 600 flanged | NPS 1/2: 157 mm | NPS 3/4: 157 mm | NPS 1: 185 mm | NPS 1-1/2: 241 mm | NPS 2: 273 mm (center-to-top (open) height, Class 150-300-600 flanged, bolted bonnet, regular port) |
| center to top open class800 welded | NPS 3/8: 157 mm | NPS 1/2: 157 mm | NPS 3/4: 165 mm | NPS 1: 192 mm | NPS 1-1/4: 272 mm | NPS 1-1/2: 277 mm | NPS 2: 283 mm (center-to-top (open) height, Class 800 welded bonnet, regular port size, full port one size smaller) |
| center to top open class900 1500 bolted or welded bolted | NPS 3/8: 163 mm | NPS 1/2: 163 mm | NPS 3/4: 190 mm | NPS 1: 225 mm | NPS 1-1/4: 263 mm | NPS 1-1/2: 264 mm | NPS 2: 319 mm (center-to-top (open) height, Class 900/1500 bolted or welded bonnet, regular port size, full port one size smaller, bolted bonnet) |
| center to top open class900 1500 bolted or welded welded | NPS 3/8: 177 mm | NPS 1/2: 177 mm | NPS 3/4: 206 mm | NPS 1: 240 mm | NPS 1-1/4: 271 mm | NPS 1-1/2: 276 mm | NPS 2: 325 mm (center-to-top (open) height, Class 900/1500 bolted or welded bonnet, regular port size, full port one size smaller, welded bonnet) |
| center to top open class900 1500 pressure seal | NPS 1/2: 230 mm | NPS 3/4: 294 mm | NPS 1: 337.5 mm | NPS 1-1/4: 396.5 mm | NPS 1-1/2: 396.5 mm | NPS 2: 449 mm (center-to-top (open) height, Class 900/1500 pressure seal bonnet, regular port size, full port one size smaller; NPS 3/8 not offered (printed dash)) |
| center to top open class2500 welded | NPS 1/2: 295 mm | NPS 3/4: 295 mm | NPS 1: 345 mm | NPS 1-1/4: 410 mm | NPS 1-1/2: 410 mm | NPS 2: 460 mm (center-to-top (open) height, Class 2500 welded bonnet, ASME B16.34, regular port size, full port one size smaller; NPS 3/8 not offered (printed dash)) |
| center to top open class2500 pressure seal | NPS 1/2: 383 mm | NPS 3/4: 383 mm | NPS 1: 406.5 mm | NPS 1-1/4: 454.5 mm | NPS 1-1/2: 454.5 mm | NPS 2: 540 mm (center-to-top (open) height, Class 2500 pressure seal bonnet, ASME B16.34, regular port size, full port one size smaller; NPS 3/8 not offered (printed dash)) |
| handwheel class150 300 600 flanged | NPS 1/2: 100 mm | NPS 3/4: 100 mm | NPS 1: 120 mm | NPS 1-1/2: 160 mm | NPS 2: 220 mm (handwheel diameter (W), Class 150-300-600 flanged, bolted bonnet, regular port) |
| handwheel class2500 pressure seal | NPS 1/2: 150 mm | NPS 3/4: 150 mm | NPS 1: 180 mm | NPS 1-1/4: 250 mm | NPS 1-1/2: 250 mm | NPS 2: 350 mm (handwheel diameter (W), Class 2500 pressure seal bonnet, ASME B16.34, regular port size, full port one size smaller; NPS 3/8 not offered (printed dash); NPS 3/8 not offered (printed dash)) |
| handwheel class2500 welded | NPS 1/2: 150 mm | NPS 3/4: 150 mm | NPS 1: 180 mm | NPS 1-1/4: 250 mm | NPS 1-1/2: 250 mm | NPS 2: 350 mm (handwheel diameter (W), Class 2500 welded bonnet, ASME B16.34, regular port size, full port one size smaller; NPS 3/8 not offered (printed dash); NPS 3/8 not offered (printed dash)) |
| handwheel class800 bolted | NPS 1/4: 100 mm | NPS 3/8: 100 mm | NPS 1/2: 100 mm | NPS 3/4: 100 mm | NPS 1: 120 mm | NPS 1-1/4: 160 mm | NPS 1-1/2: 160 mm | NPS 2: 220 mm (handwheel diameter (W), Class 800 bolted bonnet, full port size, threaded and socket weld ends, ASME B16.34/API 602) |
| handwheel class800 welded | NPS 3/8: 90 mm | NPS 1/2: 90 mm | NPS 3/4: 90 mm | NPS 1: 110 mm | NPS 1-1/4: 150 mm | NPS 1-1/2: 150 mm | NPS 2: 150 mm (handwheel diameter (W), Class 800 welded bonnet, regular port size, full port one size smaller) |
| handwheel class900 1500 bolted or welded | NPS 3/8: 90 mm | NPS 1/2: 90 mm | NPS 3/4: 110 mm | NPS 1: 150 mm | NPS 1-1/4: 150 mm | NPS 1-1/2: 150 mm | NPS 2: 180 mm (handwheel diameter (W), Class 900/1500 bolted or welded bonnet, regular port size, full port one size smaller, bolted bonnet) |
| handwheel class900 1500 pressure seal | NPS 1/2: 110 mm | NPS 3/4: 110 mm | NPS 1: 150 mm | NPS 1-1/4: 150 mm | NPS 1-1/2: 150 mm | NPS 2: 180 mm (handwheel diameter (W), Class 900/1500 pressure seal bonnet, regular port size, full port one size smaller; NPS 3/8 not offered (printed dash); NPS 3/8 not offered (printed dash)) |
Application & selection guidance
Select this execution where small-bore lines need a through-conduit shut-off at class ratings far above what a cast compact body carries: match the bonnet design to pressure (bolted for general service, pressure seal toward the top of the Class 150-4500 envelope), the forging to line temperature and medium, and the end connection to the piping standard β socket-weld and threaded ends for compact instrument-grade pipework, RF/RTJ flanges or butt-weld ends for permanent plant installation.
Frequently asked questions
What standard governs compact forged gate valves?
The benchmark execution is built to API 602, the compact forged-body gate valve standard, with both bolted bonnet and pressure seal bonnet constructions available so the same envelope serves general plant service through Class 2500-class and beyond, up to Class 4500.
Which sizes and pressure classes does this execution cover?
NPS 1/2 to 2 (DN15 to DN50) at ASME Class 150 through 4500 (PN16 to PN760) β the full compact forged envelope, where the forged body carries pressure classes that cast small-bore bodies cannot.
How do I choose body material and end connection?
Body materials span carbon steel for general service, low-temperature steel for cold service, stainless and duplex stainless for corrosion, and alloy, nickel-base or titanium-alloy forgings for severe service. End connections β RF flange, butt-weld, RTJ, socket-weld or NPT thread β follow the plant piping standard and the maintenance philosophy (welded ends for integrity, threaded or socket ends for compact replacement).
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry β typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
Sample & supply
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Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage β seat compounds age fastest in direct sunlight and freezing conditions.
Knowledge: selection guides
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