Valve Weight Chart by Class: Gate, Globe, Check & Ball
Quick answer
Cast-steel flanged valve weights scale with pressure class roughly as 1 : 1.7 : 3.1 going from Class 150 to 300 to 600 (a 6" gate valve: ≈ 84 → 144 → 266 kg). At Class 150 and 300, NPS 1/2"–24" are covered; Class 600 stops at NPS 12" in most catalogs. All values below are catalog-calibrated estimates (WCB, RF ends, manual operation) with a typical ±10–15% band — for a specific manufacturer's certified weight, use the valve weight calculatorand confirm with the supplier.
1. How to Read This Chart
Every value below is the catalog-calibrated weight of a cast steel (ASTM A216 WCB) valve with raised-face flanged ends, handwheel or lever operated, bonnet included, pressure-tested and painted — i.e., the number that shows up on a freight booking. Check valves are bolted-bonnet swing pattern; ball valves NPS ≤ 6" are floating ball, NPS ≥ 8" trunnion mounted (most catalogs quote these with gear operators, which the underlying engine factors in).
Accuracy band: ±10–15% versus any specific manufacturer's catalog. That is deliberate and honest — ASME B16.34 sets minimum wall thickness, not exact mass, and two compliant valves of the same tag can legitimately differ by 10%. Use these numbers for freight planning, load-out lists, and BOM weight roll-ups; use certified weights for customs-critical declarations.
| Multiplier vs Class 150 | Gate 6" | Globe 4" | Check 8" | Ball 6" |
|---|---|---|---|---|
| Class 150 | 1.0× | 1.0× | 1.0× | 1.0× |
| Class 300 | 1.7× | 1.5× | 1.7× | 1.3× |
| Class 600 | 3.2× | 2.4× | 2.7× | 2.0× |
Class 150 Weight Chart
| NPS | Gate (kg) | Globe (kg) | Check (swing) (kg) | Ball (kg) | Heaviest (lb) |
|---|---|---|---|---|---|
| 1/2" | 4.0 | 4.5 | 3.5 | 5.0 | 11.0 |
| 3/4" | 5.0 | 6.0 | 4.5 | 6.0 | 13.2 |
| 1" | 6.5 | 8.0 | 6.0 | 7.5 | 17.6 |
| 1-1/4" | 8.5 | 10.0 | 8.0 | 9.5 | 22.0 |
| 1-1/2" | 11.0 | 13.0 | 11.0 | 11.0 | 28.7 |
| 2" | 21.0 | 21.0 | 19.0 | 12.0 | 46.3 |
| 2-1/2" | 28.0 | 30.0 | 24.0 | 16.0 | 66.1 |
| 3" | 36.0 | 37.0 | 28.0 | 24.0 | 81.6 |
| 4" | 53.0 | 57.0 | 48.0 | 36.0 | 125.7 |
| 5" | 60.0 | 78.0 | 63.0 | 60.0 | 172.0 |
| 6" | 84.0 | 100.0 | 79.0 | 94.0 | 220.5 |
| 8" | 139.0 | 156.0 | 130.0 | 234.0 | 515.9 |
| 10" | 201.0 | 261.0 | 200.0 | 406.0 | 895.1 |
| 12" | 320.0 | 308.0 | 300.0 | 596.0 | 1,314.0 |
| 14" | 430.0 | 430.0 | 451.0 | 829.0 | 1,827.6 |
| 16" | 548.0 | 560.0 | 556.0 | 1,092.0 | 2,407.4 |
| 18" | 744.0 | 750.0 | 760.0 | 1,577.0 | 3,476.7 |
| 20" | 1,117.0 | 1,050.0 | 1,020.0 | 2,001.0 | 4,411.4 |
| 24" | 1,466.0 | 1,500.0 | 1,450.0 | 3,075.0 | 6,779.2 |
WCB, RF flanged ends, manual operation. Class 150. Full NPS 1/2"–24" coverage.
Class 300 Weight Chart
| NPS | Gate (kg) | Globe (kg) | Check (swing) (kg) | Ball (kg) | Heaviest (lb) |
|---|---|---|---|---|---|
| 1/2" | 6.0 | 7.0 | 6.0 | 6.0 | 15.4 |
| 3/4" | 7.0 | 9.0 | 8.0 | 7.5 | 19.8 |
| 1" | 9.0 | 12.0 | 10.0 | 9.5 | 26.5 |
| 1-1/4" | 12.0 | 16.0 | 13.0 | 12.0 | 35.3 |
| 1-1/2" | 15.0 | 20.0 | 17.0 | 14.0 | 44.1 |
| 2" | 28.0 | 31.0 | 31.0 | 16.0 | 68.3 |
| 2-1/2" | 36.0 | 44.0 | 39.0 | 22.0 | 97.0 |
| 3" | 51.0 | 55.0 | 45.0 | 30.0 | 121.3 |
| 4" | 78.0 | 84.0 | 68.0 | 48.0 | 185.2 |
| 5" | 107.0 | 110.0 | 90.0 | 78.0 | 242.5 |
| 6" | 144.0 | 150.0 | 136.0 | 125.0 | 330.7 |
| 8" | 228.0 | 225.0 | 220.0 | 300.0 | 661.4 |
| 10" | 320.0 | 385.0 | 315.0 | 520.0 | 1,146.4 |
| 12" | 450.0 | 520.0 | 449.0 | 760.0 | 1,675.5 |
| 14" | 694.0 | 760.0 | 640.0 | 1,050.0 | 2,314.9 |
| 16" | 1,080.0 | 1,050.0 | 880.0 | 1,380.0 | 3,042.4 |
| 18" | 1,235.0 | 1,350.0 | 1,150.0 | 1,850.0 | 4,078.5 |
| 20" | 1,655.0 | 1,850.0 | 1,580.0 | 2,400.0 | 5,291.1 |
| 24" | 2,320.0 | 2,600.0 | 2,250.0 | 3,600.0 | 7,936.6 |
WCB, RF flanged ends, manual operation. Class 300. Full NPS 1/2"–24" coverage.
Class 600 Weight Chart (NPS ≤ 12)
| NPS | Gate (kg) | Globe (kg) | Check (swing) (kg) | Ball (kg) | Heaviest (lb) |
|---|---|---|---|---|---|
| 1/2" | 9.0 | 12.0 | 11.0 | 9.0 | 26.5 |
| 3/4" | 11.0 | 15.0 | 14.0 | 11.0 | 33.1 |
| 1" | 14.0 | 19.0 | 18.0 | 14.0 | 41.9 |
| 1-1/4" | 18.0 | 25.0 | 23.0 | 18.0 | 55.1 |
| 1-1/2" | 24.0 | 32.0 | 30.0 | 23.0 | 70.5 |
| 2" | 41.0 | 45.0 | 32.0 | 24.0 | 99.2 |
| 2-1/2" | 57.0 | 64.0 | 42.0 | 34.0 | 141.1 |
| 3" | 72.0 | 78.0 | 60.0 | 45.0 | 172.0 |
| 4" | 128.0 | 135.0 | 110.0 | 75.0 | 297.6 |
| 5" | 200.0 | 212.0 | 161.0 | 130.0 | 467.4 |
| 6" | 266.0 | 327.0 | 221.0 | 190.0 | 720.9 |
| 8" | 419.0 | 480.0 | 346.0 | 430.0 | 1,058.2 |
| 10" | 754.0 | 860.0 | 628.0 | 720.0 | 1,896.0 |
| 12" | 1,000.0 | 1,150.0 | 796.0 | 1,050.0 | 2,535.3 |
WCB, RF flanged ends, manual operation. Class 600. Class 600 is rarely offered above NPS 12" in standard catalogs.
5. What the Numbers Tell You
Read down a column and three procurement facts jump out:
- →Weight grows faster than price. A 24" Class 150 gate valve weighs ~1,470 kg but costs perhaps 15× a 2" valve, not 70×. Large valves are disproportionately heavy relative to their cost — freight can rival the FOB price on big-bore orders.
- →The class premium compounds with size. Moving 6" gate from 150# to 600# adds ~180 kg; moving 12" adds ~680 kg. High-class large valves drive both structural steel and rigging requirements.
- →Ball valves overtake gate valves in weight at large NPS. Below NPS 8" a ball valve is lighter than a gate valve; above it, trunnion construction and gear operators make it heavier — visible directly in the charts.
For material and configuration adjustments — butt-weld ends (−3%), gear operators (+18% at NPS ≥ 14), stainless CF8/CF8M (+1.6–1.9%), lift or wafer checks — thevalve weight calculatorapplies the factors to these same base tables and shows every multiplier.
Get the Interactive Chart
Filter by type, class, material, end connection and operation — then copy the result or share the configured link.
6. Method & Calibration Sources
This page is not a scanned PDF — the tables are generated at build time by the same engine that powers the calculator. Base values were compiled from published cast-steel valve catalog weight charts: gate, globe and check values cross-checked against a widely referenced public catalog compilation; Class 150 ball values against a published API 6D full-bore ball valve dimension and weight chart. Sizes without a direct public reference were interpolated along the type's own weight curve.
Structural length (face-to-face) follows ASME B16.10 long patterns for gate/globe/check and API 6D patterns for ball valves — the calculator shows the reference dimension per selection. Standards context: ASME B16.34 for pressure-temperature ratings and wall thickness, API 600/602/594/608/6D for the design types.
If a supplier's quoted weight differs from this chart by more than 15–20%, ask why: it usually means a different wall schedule, a gear operator you didn't expect, or a wafer body quoted against a flanged chart line.
Frequently Asked Questions
How much does a 6 inch gate valve weigh?
A 6" Class 150 cast steel (WCB) flanged gate valve weighs approximately 84 kg (185 lb); Class 300 approximately 144 kg (318 lb); Class 600 approximately 266 kg (586 lb). Values are catalog-calibrated estimates with a ±10–15% band.
Are valve weight charts accurate?
Reasonably accurate for freight and quoting: compiled charts typically agree with any specific manufacturer's catalog within ±10–15%. They are not certified shipping weights — wall thickness selection (ASME B16.34 allows options), bonnet design and foundry practice all shift the number.
Why does Class 300 weigh so much more than Class 150?
Pressure class drives wall thickness per ASME B16.34 minimums. Going from Class 150 to 300 roughly doubles the body wall mass, and to Class 600 roughly doubles it again — a 6" gate valve goes from ~84 kg (150#) to ~144 kg (300#) to ~266 kg (600#).
Do wafer check valves follow this chart?
No — this chart lists bolted-bonnet flanged swing checks. A dual-plate wafer check of the same NPS and class weighs roughly 45% of the swing check value and has no flanged face-to-face dimension.
Where do these numbers come from?
The chart is generated at build time from our catalog-calibrated engine: base weights cross-checked against published gate/globe/check catalog compilations and a published API 6D full-bore ball valve chart, with per-size interpolation for sizes without a direct public reference. See the valve weight calculator for the full method.