Description
Overview
The US Motors 5654 is a low-temperature charge Thermal Expansion Valve (TXV) engineered for reliable refrigerant metering in R502 refrigeration systems. Featuring a straight body design with a 5-foot capillary tube, this valve delivers precise superheat control at 1/4-ton capacity, making it well-suited for light commercial and refrigeration applications operating in low-temperature environments.
Key Features
- Refrigerant: Designed for R502 systems
- Capacity: 1/4 Ton
- Charge Type: Low Temperature
- Body Style: Straight body configuration
- Capillary Tube Length: 5 feet
- Inlet Connection: 1/4″ ODF Sweat
- Outlet Connection: 3/8″ ODF Sweat
- Connection Type: Sweat (ODF)
- Model Number: HFS 1/4 RZ 5FT 1/4 X 3/8 ODF S/T
Application
This TXV is ideal for low-temperature refrigeration systems utilizing R502 refrigerant, including reach-in coolers, display cases, and other commercial refrigeration equipment requiring accurate expansion control at low evaporator temperatures. The low-temperature charge ensures proper bulb response and stable superheat regulation in demanding cold-environment installations.
Installation Notes
- Sweat (ODF) connections allow for clean, leak-free copper tube brazing
- 5-foot capillary tube provides flexible bulb placement on the suction line
- Straight body design simplifies installation in tight equipment configurations
- Always braze with nitrogen purge and follow refrigerant system best practices







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