White-rodgers 59966 Thermostatic Expansion Valve 3/4 in Odf

Product Description

The WHITE-RODGERS 59966 is a thermostatic expansion valve (TXV) designed to regulate refrigerant flow in vapor-compression cooling systems. Operating as the metering device between the high-pressure liquid line and the evaporator, the TXV maintains proper superheat by modulating refrigerant feed in response to evaporator outlet conditions. This unit features a 3/4 inch ODF connection and measures 6.95 inches in length by 2.5 inches in width. Installation is typically performed by licensed HVAC-R technicians during new equipment commissioning or system service calls involving refrigerant-side repairs.

The 59966 fits applications requiring a standard TXV metering device in split-system air conditioning and refrigeration equipment. This valve is also referenced under the VALY 1636 designation and the TS 166S series, making it a recognized replacement option in compatible cooling systems. It is suited for residential and light commercial HVAC-R installations where precise refrigerant metering and stable superheat control are required.

Key Features

• 3/4 inch ODF connection for direct sweat installation on copper refrigerant lines
• TS 166S series designation for cross-referencing and replacement sourcing
• Also cataloged under VALY 1636 for expanded compatibility identification
• Compact form factor at 6.95 inches by 2.5 inches for tight equipment compartments
• Functions as the primary refrigerant metering device between liquid line and evaporator

Compatibility

Referenced under the TS 166S series and VALY 1636 designation. Designed as an OEM-style replacement TXV for vapor-compression cooling systems requiring a 3/4 inch ODF metering valve. Verify system refrigerant type, capacity, and superheat requirements before installation.

Installation Notes

TXV replacement is performed by EPA 608-certified HVAC-R technicians only, as the work involves recovering, handling, and recharging regulated refrigerants. Recover all system refrigerant and isolate the circuit before unbrazing or disconnecting the existing valve. Use nitrogen purge when brazing the new valve into copper lines to prevent oxide scale formation inside the refrigerant circuit. After installation, leak-test the joints, evacuate the system to the required micron level, and recharge to manufacturer specifications before checking superheat at the evaporator outlet.

Technical Specifications

• Connection Size: 3/4 inch ODF
• Length: 6.95 inches
• Width: 2.5 inches
• Series: TS 166S
• Cross-Reference: VALY 1636
• Catalog Number: 059966
• UPC: 681344599667

Standard Information

• Brand: WHITE-RODGERS
• Manufacturer Part Number: 59966