Parker 640QSF-6 Quick Seal Cap Gasket 3/8 Inch

Product Description

The PARKER 640QSF-6 is a quick seal cap with gasket designed for use with Parker brass access valves. This cap seals the valve port to prevent refrigerant loss and contamination ingress when the access valve is not in use. It is a direct service accessory used on refrigerant circuit access points in HVAC and refrigeration systems. The 3/8 inch tube OD sizing makes it compatible with commonly used access valves found in residential and light commercial cooling equipment. HVAC technicians install and remove this cap routinely during system service and maintenance procedures.

This accessory is suited for residential and light commercial HVAC and refrigeration applications wherever Parker brass access valves are installed. It is typically found on suction and liquid line access fittings used during refrigerant recovery, charging, and pressure testing. The integrated gasket provides a positive seal at the valve cap seat, maintaining system integrity between service visits. Technicians working on split systems, package units, and refrigeration circuits will encounter this type of cap as a standard field component.

Key Features

• Quick seal design allows fast cap installation and removal during refrigerant service
• Integrated gasket provides a positive seal at the valve port
• Sized for 3/8 inch tube OD access valves
• Designed for use with Parker brass access valves
• Lightweight construction at 0.03 pounds per cap

Compatibility

Designed for use with Parker brass access valves with a 3/8 inch tube OD port. Consult the Parker access valve documentation to confirm fitment with your specific valve model before ordering.

Installation Notes

HVAC technicians install this cap as part of standard access valve service procedures. Recover refrigerant and relieve system pressure before removing or reinstalling any access valve cap. Inspect the gasket for damage or deformation before reuse and replace the cap if the gasket shows wear. Follow applicable EPA Section 608 requirements and local codes when working on refrigerant-containing systems.