The brass body type Q, EQ, BQ and SQ are replaceable cartridge style valves, whereby a cartridge can be selected to match the system capacity and installed in the valve body. All share identical internal construction and provide external adjustments.
These valves are all designed for small refrigeration systems such as refrigerated cases, coolers, and freezers. The externally equalized versions of these valves may be used on air conditioning and heat pump systems, the EQ body is specifically targeted for this application.
To use a Q body valve, select the appropriate body style, the cartridge that provides the appropriate capacity for the refrigerant and application you are using (QC* for standard port, BQC* for balanced port) and the KT43 (KT45 for R410A) power element as outlined in the element table (next page)