---
kind: "section"
citation: "40 C.F.R. § 204.55-3"
title: "40"
number: "204.55-3"
heading: "Configuration identification."
url: "https://uscodex.org/cfr/40/204.55-3"
---

# §204.55-3. Configuration identification.

- (a) A separate compressor configuration shall be determined by each combination of the following parameters:
  - (1) The compressor type (screw, sliding vane, etc.).
  - (2) **Number of compressor stages.**
  - (3) **Maximum pressure (psi).**
  - (4) **Air intake system of compressor—**
    - (i) Number of filters;
    - (ii) **Type of filters.**
  - (5) **The engine system—**
    - (i) Number of cylinders and configuration (L-6, V-8, V-12);
    - (ii) Displacement;
    - (iii) Horsepower;
    - (iv) **Full load rpm.**
  - (6) Type cooling system, e.g., air cooled, water cooled.
  - (7) **Fan—**
    - (i) Diameter;
    - (ii) **Maximum fan rpm.**
  - (8) **The compressor enclosure—**
    - (i) Height, length, and width;
    - (ii) **Acoustic material manufacturer, type, part number.**
  - (9) **The induction system (engine)—**
    - (i) Natural;
    - (ii) **Turbocharged.**
  - (10) **The muffler—**
    - (i) Manufacturer;
    - (ii) Manufacturer part number;
    - (iii) Quantity of mufflers used;
  - (11) Category parameters listed at [§ 204.55-2](/cfr/40/204.55-2.md).

## Notes

### Authority

Authority: (42 U.S.C. 4905), 86 Stat. 1237.

### Source

Source: 41 FR 2172, Jan. 14, 1976, unless otherwise noted.