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)

• Overall height: 3.93" with powerhead
• Strainer at inlet

The Sporlan Q & BQ series are replaceable cartridge style valves designed for small refrigeration systems, such as refrigerated cases, coolers, and freezers. The externally equalized versions of these valves are ideal for air conditioning and heat pump systems. BQ valves are balanced ported, engineered specifically for systems with a wide range of operating conditions and may be applied on bi-directional applications.

BODY FEATURES
Q & BQ brass body type valves feature Sporlan’s traditional knife edge, metal-to-metal thermostatic element to valve body construction, which ensures a leak-proof joint.

SELECTIVE CHARGES
Sporlan selective thermostatic charges are specifically designed for low temperature, medium temperature, and air conditioning applications. The elements are manufactured with a large flat diaphragm to reduce diaphragm stresses and provide precise control. And, because Q & BQ valve bodies and thermostatic elements are supplied as independent components, the installer is able to select the best possible thermostatic charge for the application.

INTERNAL PORT DESIGN
Refrigerant flow through the valve port opposes the pin movement in all type Q and BQ valves. This provides improved stability at light loads, when the pin modulates to a position close to the port. Additionally, charge migration, is reduced or eliminated by the Q & BQ valve design. By engineering the liquid flow to enter through the top of the valve body, the liquid refrigerant warms the thermostatic element and minimizes the potential for charge migration.