Parker AVU2BH-4 Bulkhead Union Access Valve 1/4 Inch

Product Description

The PARKER AVU2BH-4 is a bulkhead union access valve designed for refrigeration systems where a service port must pass through a panel, bulkhead, or cabinet wall. Rated to 500 psi maximum working pressure, this valve accepts 1/4-inch tube OD connections on both sides. The body is machined from brass for durability and compatibility with common refrigerants and refrigeration oils. HVAC and refrigeration technicians install this fitting when a system layout requires a through-panel access point for charging, evacuation, or pressure monitoring without relocating service connections.

This valve fits residential and light commercial refrigeration and HVAC applications where bulkhead-style access ports are required. It is suited for panel-mount installations in condensing units, refrigeration cabinets, and similar enclosures where a leak-free, pressure-rated pass-through service valve is needed. The 1/4-inch tube OD sizing matches standard refrigeration service port tubing commonly found across split systems and self-contained refrigeration equipment.

Key Features

• Rated to 500 psi maximum working pressure for high-side and low-side refrigeration service
• 1/4-inch tube OD connection on both sides for standard refrigeration tubing
• Brass construction offers corrosion resistance and compatibility with refrigerants and oils
• Bulkhead union design allows through-panel mounting for accessible service ports
• Compact form factor suitable for tight enclosure installations

Compatibility

Designed as an OEM-style replacement or new-installation bulkhead union access valve for refrigeration and HVAC systems using 1/4-inch OD refrigeration tubing with service port requirements up to 500 psi.

Installation Notes

Installation should be performed by a licensed HVAC or refrigeration technician. Recover all refrigerant and relieve system pressure before removing or installing any access valve. Ensure the bulkhead panel cutout dimension matches the valve body before mounting, and verify all connections are leak-tested after installation per industry standards. Follow applicable EPA Section 608 regulations for refrigerant handling.