Industry: 3491—Industrial Valves
Establishments primarily engaged in manufacturing industrial valves. Establishments primarily engaged in manufacturing fluid power valves are classified in Industry 3492; those manufacturing plumbing fixture fittings and trim are classified in Industry 3432; and those manufacturing plumbing and heating valves are classified in Industry 3494.
| Boiler gauge cocks | Valves, automatic control: industrial, except fluid power |
| Compressed gas cylinder valves | Valves, industrial: gate, globe, check, pop safety, and relief |
| Fire hydrant valves | Valves, nuclear |
| Gas valves and parts, industrial | Valves, relief: over 15 lbs. w.s.p. |
| Pop safety valves, over 15 lbs. w.s.p. | Valves, solenoid: except fluid power |
| Pressure valves, industrial: except power transfer | Water works valves |
| Steam traps, over 16 lb. w.s.p. | |
| Codes |
Titles | Total Marketable US Businesses |
| 34910000 | Industrial valves | 574 |
| 34910100 | Automatic regulating and control valves | 70 |
| 34910101 | Process control regulator valves | 36 |
| 34910102 | Valves, automatic control | 37 |
| 34919901 | Boiler gauge cocks | 2 |
| 34919902 | Compressed gas cylinder valves | 15 |
| 34919903 | Fire hydrant valves | 15 |
| 34919904 | Gas valves and parts, industrial | 31 |
| 34919905 | Pressure valves and regulators, industrial | 44 |
| 34919906 | Regulators (steam fittings) | 3 |
| 34919907 | Solenoid valves | 24 |
| 34919908 | Steam traps | 13 |
| 34919909 | Valves, nuclear | 2 |
| 34919910 | Water works valves | 37 |
