Description
Parker-Sporlan OSE-21-SX35 Thermostatic Expansion Valve
The Parker-Sporlan OSE-21-SX35 (SKU 124231P) is a high-performance externally equalized thermostatic expansion valve (TXV) engineered for reliable refrigerant flow control in commercial and industrial refrigeration and air conditioning systems. Designed and manufactured by Parker-Sporlan — a globally recognized leader in refrigeration controls — this valve delivers precise superheat regulation to maximize system efficiency and protect the compressor from liquid slugging.
Product Overview
The OSE series expansion valves from Parker-Sporlan are built for demanding HVAC/R applications where accurate metering of refrigerant is critical. The external equalizer design compensates for pressure drop across the evaporator, ensuring consistent superheat control even in systems with longer or more complex evaporator circuits. The SX35 designation identifies the specific refrigerant and capacity configuration for this valve.
Key Features
- Externally equalized design for accurate superheat control across varied evaporator pressure drops
- 1-1/8″ inlet x 1-3/8″ outlet ODF (solder) connections for easy field installation
- OSE-21-SX35 model engineered for compatibility with designated refrigerant types and system capacities
- Robust construction for long service life in commercial refrigeration and HVAC applications
- Parker-Sporlan quality manufacturing ensures consistent performance and reliability
- Designed to protect compressors by preventing liquid refrigerant floodback
- Suitable for use in a wide range of evaporator configurations
Connection Specifications
- Inlet Connection: 1-1/8″ ODF (solder)
- Outlet Connection: 1-3/8″ ODF (solder)
- Equalization Type: External
Applications
- Commercial refrigeration systems
- Air conditioning and heat pump systems
- Industrial process cooling
- Multi-circuit evaporator systems requiring external equalization
Why Choose Parker-Sporlan?
Parker-Sporlan has been a trusted name in refrigeration controls for decades, offering a comprehensive line of expansion valves, filter driers, solenoid valves, and related components. The OSE series is a proven solution for technicians and engineers who demand precision, durability, and ease of installation in every application.







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