scope:

This standard is applicable to

(a) thermostatic expansion valves (also referred to in this standard as expansion valves) as defined in Section 3, "Definitions,"

(b) expansion valves of the direct-acting type but not the pilot-operated type, and

(c) many currently used refrigerants deemed available and suitable according to ANSI/ASHRAE Standard 15, Safety Standard for Refrigeration Systems, and ANSI/ASHRAE Standard 34, Designation and Safety Classification of Refrigerants.

This standard specifies procedures, apparatus, and instrumentation that will produce accurate capacity data.

This standard does not

(a) specify tests for production, specification compliance, or field testing of expansion valves, nor

(b) specify capacity rating conditions for testing expansion valves. These may be found in ARI Standard 750, Thermostatic Refrigerant Expansion Valves.