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Brass thermostatic expansion valve with 30-inch capillary tube and flare connections

Parker

Parker CE-B-SZ thermostatic expansion valve 1-2 ton adjustable R-404A

SKU CH-D28A-FFSQW

Adjustable thermostatic expansion valve for R-404A systems rated 1 to 2 tons with 30 inch capillary and externally adjustable range

  • TypeAdjustable
  • Adjustable superheat control for 1-2 ton R-404A systems
  • Externally adjustable design simplifies field calibration
  • Balanced port construction minimises hunting and flood-back
  • 30-inch capillary provides flexible bulb placement
  • SAE flare connections with included mounting clamp

Parker CE-B-SZ Thermostatic Expansion Valve

This Parker CE-B-SZ thermostatic expansion valve regulates refrigerant flow in R-404A systems with a nominal capacity of 1 to 2 tons. It is designed for commercial refrigeration and air-conditioning equipment requiring precise superheat control. The externally adjustable design allows technicians to fine-tune performance across varying evaporator loads. It includes a sensing bulb mounting clamp for secure installation.

Compatibility and Installation Checks

Verify that the system uses R-404A refrigerant and operates within the 1 to 2 ton capacity range before ordering. Confirm the SAE flare angle connections match the 3/8 inch inlet and 1/2 inch outlet sizes on existing piping. Ensure the 30 inch capillary length reaches the evaporator outlet from the planned valve location. The adjustable range covers -40 to 0 degrees Fahrenheit for low-temperature applications.

Build Quality and Daily Operation

The balanced port construction maintains accuracy over wide load variations, minimising hunting, flood-back and coil starving problems. Externally adjustable stem permits superheat changes without removing the valve from the line. Brass flare connections with the 750-70 designation provide reliable sealing under vibration. The included sensing bulb clamp ensures consistent thermal contact for stable day-to-day operation.

Highlights

  • Adjustable superheat control for 1-2 ton R-404A systems
  • Externally adjustable design simplifies field calibration
  • Balanced port construction minimises hunting and flood-back
  • 30-inch capillary provides flexible bulb placement
  • SAE flare connections with included mounting clamp

Specifications

BrandPARKER
TypeAdjustable

Questions about this item

Does the CE-B-SZ valve come with the sensing bulb mounting clamp or must it be purchased separately?

The clamp is included with the valve so no separate purchase is required.

Should I select the 1 ton or 2 ton setting for a system rated at 1.5 tons?

The valve covers a 1 to 2 ton nominal capacity range and is externally adjustable, so you set it to match the actual load.

What does the -40 to 0 range mean once the valve is installed in a rack?

It indicates the adjustable operating range in degrees Fahrenheit, letting the valve maintain superheat across low-temperature evaporator conditions.

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