---
kind: "section"
citation: "46 C.F.R. § 197.310"
title: "46"
number: "197.310"
heading: "Air compressor system."
url: "https://uscodex.org/cfr/46/197.310"
---

# §197.310. Air compressor system.


A compressor used to supply breathing air to a diver must have—

- (a) **A volume tank that is—**
  - (1) **Built and stamped in accordance with section VIII, division 1 of the ASME Code with—**
    - (i) A check valve on the inlet side;
    - (ii) A pressure gage;
    - (iii) A relief valve; and
    - (iv) A drain valve; and
  - (2) Tested after every repair, modification, or alteration to the pressure boundaries as required by [§ 197.462](/cfr/46/197.462.md);
- (b) Intakes that are located away from areas containing exhaust fumes of internal combustion engines or other hazardous contaminants;
- (c) An efficient filtration system; and
- (d) Slow-opening shut-off valves when the maximum allowable working pressure of the system exceeds 500 psig.

## Notes

### Authority

Authority: 33 U.S.C. 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 3703, 6101; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 76-009, 43 FR 53683, Nov. 16, 1978, unless otherwise noted.