SIC Code 3491
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
- Compressed gas cylinder valves
- Fire hydrant valves
- Gas valves and parts, industrial
- Pop safety valves, over 15 lbs. w.s.p.
- Pressure valves, industrial: except power transfer
- Steam traps, over 16 lb. w.s.p.
- Valves, automatic control: industrial, except fluid power
- Valves, industrial: gate, globe, check, pop safety, and relief
- Valves, nuclear
- Valves, relief: over 15 lbs. w.s.p.
- Valves, solenoid: except fluid power
- Water works valves
Companies assigned to SIC code 3491:
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