API Forged Steel Internal Thread Gate Valve
The API 602 forged steel threaded gate valve is specifically designed for small-diameter industrial pipeline systems, providing reliable shutoff and isolation of fluid flow. The valve body is manufactured from high-strength forged steel, precisely machined to deliver excellent mechanical strength, pressure resistance, and high-temperature performance, suitable for demanding applications in oil, chemical, power, and general industrial pipelines.
The valve features a full-bore straight-through design, with the gate moving along the stem to isolate the flow. The low resistance during opening and closing ensures efficient fluid transport. The rising stem design provides a clear visual indication of valve position, facilitating on-site operation and monitoring. The sealing system can be configured with soft or metal-to-metal hard seats to achieve tight shutoff performance and enhanced wear and corrosion resistance.
A variety of materials are available, including carbon steel (A105), alloy steel (F11, F22), and stainless steel (F304, F316L), allowing selection based on medium corrosiveness and temperature requirements. Nominal sizes range from 3/8” to 2” (DN10–DN50), with pressure classes covering 150, 300, 600, 800, and 1500 lb, accommodating diverse operating conditions.
NPT threaded connections enable quick and compact installation in small-diameter piping systems, particularly suitable for confined spaces or densely arranged pipelines. This forged steel threaded gate valve is widely used in petrochemical, natural gas, metallurgical, power, and industrial pipeline systems, providing reliable shutoff performance and serving as an ideal solution for high-pressure, high-temperature, and corrosive service conditions.
Pressure Rating: 150 LB – 2500 LB, 1.0 – 42.0 MPa
Size Range: 1/2″ – 60″ (DN 15 – DN 1500)
Working Temperature: -86°C to 816°C
Standards: API, ANSI, ASME, DIN, JIS, BS
Materials: Carbon Steel, Stainless Steel, Alloy Steel, Special Alloys
Operation: Manual, Gear, Electric, Pneumatic
Structural Characteristics of
Forged steel construction for high-stress applications The valve body is produced by integral forging, providing continuous grain flow and dense internal structure, ensuring excellent resistance to high pressure and thermal stress in demanding service conditions.
Compact design for small-bore high-pressure systems Designed in compliance with API 602, the valve features a compact structure optimized for small-bore, high-pressure pipelines and space-limited installations.
The NPT threaded ends allow direct connection to piping without welding or flanges, offering convenient installation and easy maintenance for modular or frequently serviced systems.
The wedge-type gate structure ensures balanced force distribution during opening and closing, supporting reliable shut-off performance in on/off service conditions.
Available in carbon steel, alloy steel, and stainless steel materials to suit steam, oil, gas, and corrosive media applications.
Commonly used in high-pressure branch lines, instrument piping, and auxiliary systems in petroleum, chemical, power, and industrial facilities.

Main Components Material
| Part Name | A105 / F6a | A105 / F6a HFS | LF2 / 304 | F11 / F6a HT | F304 / L304(L) | F316 / L316(L) | F51 / F51 |
|---|---|---|---|---|---|---|---|
| Body | A105 | A105 + HF | LF2 | F11 + HF | F304 | F316 | F51 |
| Disc | F6a | F6a | F304 | F6a HF | F304(L) | F216(L) | F51 |
| Stem | 410 | 410 | 304 | 410 | 304(L) | 316(L) | F51 |
| Gasket | 304 + Flexible Graphite | 304 + Flexible Graphite | 304 + Flexible Graphite | 304 + Flexible Graphite | 304 + Flexible Graphite | 304 + Flexible Graphite | 304 + Flexible Graphite |
| Bonnet | A105 | A105 | LF2 | F11 | F304(L) | F316(L) | F51 |
| Bolt | B7 | B7 | L7 | B16 | B8(M) | B8(M) | B8M |
| Pin | 410 | 410 | 410 | 410 | 304 | 304 | 304 |
| Gland | 410 | 410 | 304 | 410 | 304 | 316 | F51 |
| Gland Eyebolt | B7 | B7 | L7 | B16 | B8(M) | B8(M) | B8M |
| Gland Flange | A105 | A105 | LF2 | F304 | F304(L) | F316(L) | F304 |
| Hex Nut | 2H | 2H | 7 | 7 | 8(M) | 8(M) | 8M |
| Stem Nut | 410 | 410 | 410 | 410 | 410 | 410 | 410 |
| Locking Nut | 35 | 35 | 35 | 35 | 35 | 35 | 35 |
| Nameplate | AL | AL | AL | AL | AL | AL | AL |
| Handwheel | A197 | A197 | A197 | A197 | A197 | A197 | A197 |
| Packing | Graphite | Graphite | Graphite | Graphite | Graphite | Graphite | Graphite |
Class 150LB Main Connection Dimensions
| DN | SIZE | L | D | D1 | D2 | b | f | n-Φd | H | D0 |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 1/2″ | 108 | 90 | 60.3 | 34.9 | 10 | 2 | 4-16 | 158 | 100 |
| 20 | 3/4″ | 117 | 100 | 69.9 | 42.9 | 10.9 | 2 | 4-16 | 163 | 100 |
| 25 | 1″ | 127 | 110 | 79.4 | 50.8 | 11.6 | 2 | 4-16 | 193 | 125 |
| 32 | 1-1/4″ | 140 | 115 | 88.9 | 63.5 | 13.2 | 2 | 4-16 | 250 | 160 |
| 40 | 1-1/2″ | 165 | 125 | 98.4 | 73 | 14.7 | 2 | 4-16 | 285 | 160 |
| 50 | 2″ | 178 | 150 | 120.7 | 92.1 | 16.3 | 2 | 4-19 | 325 | 180 |
| 65 | 2-1/2″ | 190 | 180 | 139.7 | 104.8 | 17.9 | 2 | 4-19 | 350 | 190 |
| 80 | 3″ | 203 | 190 | 152.4 | 127 | 19.5 | 2 | 4-19 | 380 | 200 |
| 100 | 4″ | 229 | 230 | 190.5 | 157.2 | 24.3 | 2 | 8-19 | 460 | 230 |
| 125 | 5″ | 254 | 255 | 215.9 | 185.7 | 24.3 | 2 | 8-22 | 630 | 250 |
| 150 | 6″ | 267 | 280 | 241.3 | 215.9 | 25.9 | 2 | 8-22 | 635 | 260 |
| 200 | 8″ | 292 | 345 | 298.5 | 269.9 | 29 | 2 | 8-22 | 765 | 290 |
| 250 | 10″ | 330 | 405 | 362 | 323.8 | 30.6 | 2 | 12-26 | 895 | 330 |
| 300 | 12″ | 356 | 485 | 431.8 | 381 | 32.2 | 2 | 12-26 | 1080 | 350 |
| 350 | 14″ | 381 | 535 | 476.3 | 412.8 | 35.4 | 2 | 12-29 | 1295 | 380 |
| 400 | 16″ | 406 | 595 | 539.8 | 469.9 | 37 | 2 | 16-29 | 1435 | 400 |
| 450 | 18″ | 432 | 635 | 577.9 | 533.4 | 40.1 | 2 | 16-32 | 1625 | 430 |
| 500 | 20″ | 457 | 700 | 635 | 584.2 | 43.3 | 2 | 20-32 | 1830 | 450 |
| 600 | 24″ | 508 | 815 | 749.3 | 692.2 | 48.1 | 2 | 20-35 | 2175 | 500 |
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