Parker
Parker SCE-B-SZ thermostatic expansion valve 1-2 ton adjustable
Adjustable thermostatic expansion valve for 1-2 ton R-404A systems with 30 in capillary and external adjustment
- TypeAdjustable
- Adjustable superheat control for 1-2 ton R-404A systems
- 30 inch capillary length enables flexible evaporator mounting
- External adjustment allows precise calibration without system shutdown
- Angle solder connections 3/8 inch inlet and 1/2 inch outlet
- Includes sensing bulb mounting clamp for secure installation
Adjustable R-404A expansion valve
The Parker SCE-B-SZ is a thermostatic expansion valve designed for R-404A refrigerant systems with a nominal capacity of 1 to 2 tons. It features external angle solder connections with a 3/8 inch inlet and 1/2 inch outlet. The valve includes a sensing bulb mounting clamp and a 30 inch capillary for installation flexibility.
External adjustment with wide load accuracy
This valve is externally adjustable, allowing technicians to set superheat without removing the unit from the line. Accuracy is maintained over a wide variation in evaporator load, minimizing hunting, flood back and coil starving problems during operation. The adjustable range suits systems requiring field tuning.
Capacity suited for small commercial units
The 1 to 2 ton nominal capacity fits walk-in coolers, reach-in cases and similar low-temperature R-404A applications. It handles normal load swings without losing control but is not sized for larger racks or multi-circuit systems needing higher refrigerant flow. Installers should verify the tonnage matches the evaporator rating.
Highlights
- Adjustable superheat control for 1-2 ton R-404A systems
- 30 inch capillary length enables flexible evaporator mounting
- External adjustment allows precise calibration without system shutdown
- Angle solder connections 3/8 inch inlet and 1/2 inch outlet
- Includes sensing bulb mounting clamp for secure installation
Specifications
| Brand | Parker |
|---|---|
| Type | Adjustable |
Questions about this item
Should I choose the 1-ton or 2-ton setting for my system?
The valve covers a nominal capacity range of 1 to 2 tons, so select the setting that matches your evaporator load within that span.
What does the -40 to 0 range mean once the valve is installed?
It indicates the adjustable operating temperature range in degrees Fahrenheit, allowing the valve to control superheat from -40 °F up to 0 °F.
How does the 30-inch capillary length affect installation?
A 30-inch capillary gives flexibility to position the sensing bulb on the suction line while keeping the valve body at the evaporator inlet.
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