Gate Valve Dimensions Chart
Select the right gate valve faster. This reference covers Class 150 / 300 / 600 / 900 ratings with full dimensional data — face-to-face length, flange OD, bolt patterns, and weight — so your engineering team can spec and quote without guesswork.
Gate Valve Pressure Classes at a Glance
Different pressure classes of gate valves vary significantly in dimensions, weight, and materials. The table below shows the key characteristics of Class 150, 300, 600, and 900.
Class 150
- Lightweight Design
- Minimal Wall Thickness
- Cost Effective
- DN 15-600 (½"-24")
- Manual Handwheel
- Standard Configuration
Class 300
- Medium Pressure Rated
- Thicker Walls
- Versatile Application
- DN 15-600 (½"-24")
- Manual/Gear Drive
- Larger Flanges
Class 600
- Heavy Duty Design
- Reinforced Walls
- High Pressure Rated
- DN 15-600 (½"-24")
- Gear Operated
- Oversized Flanges
Class 900
- Ultra High Pressure
- Maximum Reinforcement
- Extreme Applications
- DN 50-400 (2"-16")
- Gear Operated
- Specialty Configuration
Class 150 Gate Valve Dimension Specifications
Class 150 is the lightweight gate valve for low-pressure applications. Design pressure range PN 10-25, with face-to-face length per ASME B16.10 and flange dimensions per ASME B16.5.
Class 150 Features
Design Range: PN 10 / PN 16 / PN 25 (Class 150)
Pipe Size Range: ½" to 40" (DN 15 to DN 1000)
Actuation: Manual handwheel (small sizes) or gear drive (large sizes)
- Flange Standard ASME B16.5 Rf (Raised Face)
- Connection Types Flanged, welded, threaded ends available
- Material Options Cast Steel, Stainless Steel 304/316L, Cast Iron
- Gate Type Wedge gate or parallel gate available
- Operating Temp Range -29°C to +200°C (standard)
- Face-to-Face Length Per ASME B16.10 (see table below)
Class 150 Dimension Table (Unit: mm)
| NPS/DN | L | D | D1 | D2 | b-f | Z-Φd | H | D0 |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 108 | 90 | 60.3 | 34.9 | 8-2 | 4-16 | 188 | 120 |
| 3/4" | 117 | 100 | 69.9 | 42.9 | 8.9-2 | 4-16 | 202 | 120 |
| 1" | 127 | 110 | 79.4 | 50.8 | 9.6-2 | 4-16 | 225 | 140 |
| 1¼" | 140 | 115 | 88.9 | 63.5 | 11.2-2 | 4-16 | 252 | 160 |
| 1½" | 165 | 125 | 98.4 | 73 | 12.7-2 | 4-16 | 277 | 180 |
| 2" | 178 | 150 | 120.7 | 92.1 | 14.3-2 | 4-19 | 310 | 200 |
| 2½" | 190 | 180 | 139.7 | 104.8 | 15.9-2 | 4-19 | 380 | 220 |
| 3" | 203 | 190 | 152.4 | 127 | 17.5-2 | 4-19 | 412 | 240 |
| 4" | 229 | 230 | 190.5 | 157.2 | 22.3-2 | 8-19 | 471 | 280 |
| 5" | 254 | 255 | 215.9 | 185.7 | 22.3-2 | 8-22 | 516 | 300 |
| 6" | 267 | 280 | 241.3 | 215.9 | 23.9-2 | 8-22 | 588 | 300 |
| 8" | 292 | 345 | 298.5 | 269.9 | 27-2 | 8-22 | 741 | 350 |
| 10" | 330 | 405 | 362 | 323.8 | 28.6-2 | 12-25 | 903 | 400 |
| 12" | 356 | 485 | 431.8 | 381 | 30.2-2 | 12-25 | 1054 | 500 |
| 14" | 381 | 535 | 476.3 | 412.8 | 33.4-2 | 12-29 | 1295 | 600 |
| 16" | 406 | 595 | 539.8 | 469.9 | 35-2 | 16-29 | 1435 | 600 |
| 18" | 432 | 635 | 577.9 | 533.4 | 38.1-2 | 16-32 | 1626 | 650 |
| 20" | 457 | 700 | 635 | 584.2 | 41.3-2 | 20-32 | 1859 | 650 |
| 24" | 508 | 815 | 749.5 | 692.2 | 46.1-2 | 20-35 | 2175 | 700 |
| 26" | 559 | 870 | 806.4 | 749 | 66.7-2 | 24-35 | 2387 | / |
| 28" | 610 | 925 | 863.6 | 800 | 69.9-2 | 28-35 | 2590 | / |
| 30" | 610 | 985 | 914.4 | 857 | 73.1-2 | 28-35 | 2819 | / |
| 32" | 711 | 1060 | 977.9 | 914 | 79.4-2 | 28-41 | 2870 | / |
| 36" | 711 | 1170 | 1085.8 | 1022 | 88.9-2 | 32-41 | 2997 | / |
| 40" | 1067 | 1290 | 1200.2 | 1124 | 88.9-2 | 36-41 | 3302 | / |
Class 300 Gate Valve Dimension Specifications
Class 300 is a medium pressure gate valve with a more robust structure than Class 150. Design pressure range PN 40-50, widely used in oil, chemical, and energy sector applications.
Class 300 Features
Design Range: PN 40 / PN 50 (Class 300)
Pipe Size Range: ½" to 28" (DN 15 to DN 700)
Actuation: Manual handwheel (small) or gear drive (medium sizes)
- Flange Standard ASME B16.5 Rf (Raised Face)
- Flange Upgrade Larger flange diameter & thickness vs Class 150
- Wall Thickness Thicker valve body for higher pressure
- Material Options Cast Steel A216 WCB, Stainless, Cast Iron
- Operating Temp Range -29°C to +250°C (standard)
- Application Oil & gas, chemical, power, metallurgical medium-pressure systems
Class 300 Dimension Table (Unit: mm)
| NPS/DN | L | D | D1 | D2 | b-f | Z-Φd | H | D0 |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 140 | 95 | 66.7 | 34.9 | 12.7-2 | 4-16 | 188 | 120 |
| 3/4" | 152 | 115 | 82.6 | 42.9 | 14.3-2 | 4-19 | 202 | 120 |
| 1" | 165 | 125 | 88.9 | 50.8 | 15.9-2 | 4-19 | 225 | 140 |
| 1¼" | 178 | 135 | 98.4 | 63.5 | 17.5-2 | 4-19 | 252 | 160 |
| 1½" | 190 | 155 | 114.3 | 73 | 19.1-2 | 4-22 | 277 | 180 |
| 2" | 216 | 165 | 127 | 92.1 | 20.7-2 | 8-19 | 353 | 250 |
| 2½" | 241 | 190 | 149.2 | 104.8 | 23.9-2 | 8-22.5 | 377 | 250 |
| 3" | 282 | 210 | 168.3 | 127 | 27-2 | 8-22.5 | 397 | 300 |
| 4" | 305 | 255 | 200 | 157.2 | 30.2-2 | 8-22.5 | 482 | 300 |
| 5" | 381 | 280 | 235 | 185.7 | 33.4-2 | 8-22.5 | 568 | 350 |
| 6" | 403 | 320 | 269.9 | 215.9 | 35-2 | 12-22.5 | 625 | 350 |
| 8" | 419 | 380 | 330.2 | 269.9 | 39.7-2 | 12-25.5 | 776 | 400 |
| 10" | 457 | 445 | 387.4 | 323.8 | 46.1-2 | 16-29 | 958 | 500 |
| 12" | 502 | 520 | 450.8 | 381 | 49.3-2 | 16-32 | 1135 | 600 |
| 14" | 762 | 585 | 514.4 | 412.8 | 52.4-2 | 20-32 | 1205 | 600 |
| 16" | 838 | 650 | 571.5 | 469.9 | 55.6-2 | 20-35 | 1367 | 650 |
| 18" | 914 | 710 | 628.6 | 533.4 | 58.8-2 | 24-35 | 2077 | / |
| 20" | 991 | 775 | 685.8 | 584.2 | 62-2 | 24-35 | 2310 | / |
| 24" | 1143 | 915 | 812.8 | 692.2 | 68.3-2 | 24-41 | 2810 | / |
| 26" | 1245 | 970 | 876.3 | 749 | 77.8-2 | 28-45 | 3105 | / |
| 28" | 1346 | 1035 | 939.8 | 800 | 84.2-2 | 28-45 | 3300 | / |
Class 600 / Class 900 Gate Valve Dimension Specifications
Class 600 and Class 900 are heavy-duty high-pressure gate valves designed for demanding applications. Featuring thickened valve bodies, oversized flanges, and heavy-duty gear actuation, suitable for high-pressure oil & gas and chemical systems.
Class 600 / 900 Features
Design Range: PN 100 / PN 110 / PN 150 / PN 160 (Class 600 / Class 900)
Pipe Size Range: ½" to 24" (DN 15 to DN 600)
Actuation: Heavy-duty gear drive (mandatory for most sizes)
- Flange Standard ASME B16.5 RF / RTJ (Ring Type Joint)
- Wall Thickness Ultra-thick valve body for extreme pressure
- Material Options Cast Steel A216 WCB, A352 LCC, Alloy Steel
- Gate Type Flexible wedge or solid wedge
- Operating Temp Range -29°C to +425°C (standard)
- Application High-pressure oil & gas, chemical, power generation
Class 600
Pressure Rating: PN 100-110
Application: High-pressure oil & gas, chemical
Actuation: Gear drive
Class 900
Pressure Rating: PN 150-160
Application: Ultra high-pressure systems
Actuation: Gear drive
Common Features
Pipe Size: DN 15-600 (½"-24")
Gate Type: Wedge / Parallel optional
Material: Cast Steel A216 WCB / A352 LCC
Class 600 Dimension Table (Unit: mm)
| NPS/DN | L | D | D1 | D2 | b-f | Z-Φd | H | D0 |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 165 | 95 | 66.7 | 34.9 | 14.3-7 | 4-16 | 195 | 200 |
| 3/4" | 190 | 115 | 82.6 | 42.9 | 15.9-7 | 4-19 | 210 | 240 |
| 1" | 216 | 125 | 88.9 | 50.8 | 17.5-7 | 4-19 | 238 | 240 |
| 1¼" | 229 | 135 | 98.4 | 63.5 | 20.7-7 | 4-19 | 278 | 300 |
| 1½" | 241 | 155 | 114.3 | 73 | 22.3-7 | 4-22 | 312 | 300 |
| 2" | 292 | 165 | 127 | 92.1 | 25.4-7 | 8-19 | 379 | 350 |
| 2½" | 330 | 190 | 149.2 | 104.8 | 28.6-7 | 8-22.5 | 420 | 400 |
| 3" | 356 | 210 | 168.3 | 127 | 31.8-7 | 8-22.5 | 461 | 450 |
| 4" | 432 | 275 | 215.9 | 157.2 | 38.1-7 | 8-25.5 | 545 | 500 |
| 5" | 508 | 330 | 266.7 | 185.7 | 44.5-7 | 8-29 | 630 | 600 |
| 6" | 559 | 355 | 292.1 | 215.9 | 47.7-7 | 12-29 | 745 | 700 |
| 8" | 660 | 420 | 349.2 | 269.9 | 55.6-7 | 12-32 | 881 | 700 |
| 10" | 787 | 510 | 431.8 | 323.8 | 63.5-7 | 16-35 | 1062 | 800 |
| 12" | 838 | 560 | 489 | 381 | 66.7-7 | 20-35 | 1194 | / |
| 14" | 889 | 605 | 527 | 412.8 | 69.9-7 | 20-38 | 1630 | / |
| 16" | 991 | 685 | 603.2 | 469.9 | 76.2-7 | 20-41 | 2032 | / |
| 18" | 1092 | 745 | 654 | 533.4 | 82.6-7 | 20-44.5 | 2186 | / |
| 20" | 1194 | 815 | 723.9 | 584.2 | 88.9-7 | 24-44.5 | 2420 | / |
| 24" | 1397 | 940 | 838.2 | 692.2 | 101.6-7 | 24-51 | 2845 | / |
Class 900 Dimension Table (Unit: mm)
| NPS/DN | L | D | D1 | D2 | b-f | Z-Φd | H | D0 |
|---|---|---|---|---|---|---|---|---|
| 2" | 368 | 215 | 165.1 | 92.1 | 38.1-7 | 8-25 | 465 | 300 |
| 2½" | 419 | 245 | 190.5 | 104.8 | 41.3-7 | 8-29 | 525 | 400 |
| 3" | 381 | 240 | 190.5 | 127 | 38.1-7 | 8-25 | 625 | 500 |
| 4" | 457 | 290 | 235 | 157.2 | 44.5-7 | 8-32 | 855 | 550 |
| 5" | 559 | 350 | 279.4 | 185.7 | 50.8-7 | 8-35 | 960 | 600 |
| 6" | 610 | 380 | 317.5 | 215.9 | 55.6-7 | 12-32 | 1195 | 700 |
| 8" | 737 | 470 | 393.7 | 269.9 | 63.5-7 | 12-38 | 1220 | / |
| 10" | 838 | 545 | 469.9 | 323.8 | 69.9-7 | 16-38 | 1440 | / |
| 12" | 965 | 610 | 533.4 | 381 | 79.4-7 | 20-38 | 1622 | / |
| 14" | 1029 | 640 | 558.8 | 412.8 | 85.8-7 | 20-41 | 1790 | / |
| 16" | 1130 | 705 | 616 | 469.9 | 88.9-7 | 20-44 | 1915 | / |
Gate Valve Product Photography
The following images showcase actual gate valves across different pressure classes and actuation types. You can observe the clear differences in valve body size, flange dimensions, and drive mechanisms.
Gate Valve Dimension Drawing Label Guide
Gate valve dimension drawings use standardized symbols and labels. Understanding these labels enables engineers to quickly interpret technical drawings, CAD files, and manufacturer datasheets.
Face-to-Face / End-to-End Length
Distance between flange faces or end-to-end dimension for butt-weld valves. Defined per ASME B16.10.
Flange Outside Diameter
Overall diameter of the flanged end. Must match the mating flange per ASME B16.5.
Bolt Circle Diameter
Diameter of the circle connecting bolt hole centers on the flange face. Critical for bolt pattern alignment.
Sealing Surface Diameter
Effective sealing surface diameter where the gasket makes contact. Critical to seal integrity.
Overall Height
Height from pipe centerline to the top of handwheel or actuator stem. Essential for space planning.
Handwheel Diameter
Diameter of the manual handwheel. Larger on higher pressure classes for mechanical advantage.
How to Choose the Correct Gate Valve Dimensions
Selecting a gate valve involves more than just size—you must consider pressure class, material, and actuation. Follow these steps to use this dimension guide effectively and specify the right valve for your application:
Confirm NPS / DN Size
Match the valve NPS or DN to the pipe specified in your P&ID or piping layout drawing. Oversizing increases cost and weight; undersizing causes flow restriction.
Determine Pressure Class
Reference the ASME B16.34 pressure-temperature rating chart and select the class matching your system operating conditions. Different classes have dramatically different flange sizes and weights.
Plan Installation Space
Gate valves require vertical clearance for the fully open gate, stem, handwheel or actuator. Use the H dimension to design adequate clearances around equipment and platforms.
Select Actuation Type
Small sizes can use handwheel operation; larger sizes or frequent operation require gear drive. Class 600/900 typically mandate gear actuation.
Choose Material Grade
Standard applications use A216 WCB (cast steel); low-temperature service use A352 LCC; corrosive service use Stainless Steel 304/316L.
Obtain Engineering Drawings
After finalizing selection, request complete dimension drawings, 3D CAD models, and weight data from the manufacturer for detailed design and procurement.
Gate Valve Dimensions FAQ
What is the main difference between Class 150 and Class 300?
Class 300 features significantly larger flange diameters (D), thicker walls, and heavier construction. Class 300 can operate at roughly 3× the pressure of Class 150. Review the dimension tables to see the specific size differences—they are dramatic.
Can I install a Class 300 valve in a Class 150 system?
Physically yes, but it's wasteful. While a Class 300 will install in a Class 150 system, you'll incur unnecessary cost and weight. All system components should use consistent pressure ratings for safety and economy.
Why is face-to-face length (L) critical in CAD design?
Face-to-face length determines the axial space occupied by the valve in the piping. Accurate L values are essential in 3D pipe routing and interference checking to ensure the valve clears adjacent equipment, supports, and structures.
Must Class 600 and Class 900 use gear drive?
Strongly recommended. While small Class 600 valves might theoretically use handwheel operation, the required torque becomes excessive. Class 900 must be gear-driven. Handwheel operation risks equipment damage and personnel injury—always comply with pressure equipment safety standards.
What does "/" mean in the dimension tables?
"/" indicates data not applicable or requiring special confirmation. Weight data, for example, varies by material, gate type, and special configurations. Always request manufacturer weight certificates for critical applications.
Where can I get Class 1500 / 2500 dimension data?
Xintai Valves manufactures API 600 gate valves in all classes from 150 to 2500. For Class 1500/2500 dimension tables, technical datasheets, and CAD drawings, contact our engineering team with your application details.
