Valve Cores

A valve core is a spring-actuated, cartridge-type check valve assembly that screws into a mating threaded cavity (housing).

The valve has a soft elastomeric sealing washer and an extended actuation shaft. When the actuation shaft is depressed, it forces the pin to move off the valve core’s housing seat, allowing flow to pass through the valve. The core assembly has an external static seal to prevent leakage between the valve core and the mating cavity it screws into.

There are a number of options for customers wishing to purchase valve cores in both the OEM and aftermarket sectors, as shown in the part tables on page 5 and “Selecting a Schrader Pacific Valve” on page 8.

Most Schrader Pacific valves have threads and bodies with a standard exterior size allowing for use of universal caps and tools. A Schrader Pacific valve can be used to control air, nitrogen, R12, R22, R134a, R1234yf, halon, SF6, and many other fluids.

Remember that the valve core is a mated pair working in collaboration with our high-side charge and low-side service ports. Our valve cores are designed, validated, and manufactured for optimal performance with our charge and service ports. Please review our Valve Cores Brochure, AC Valve Application and Installation Manual, AC Housing/Cores Matrix – R1234yf and AC Housing/Cores Matrix – R134a for more details.

Valve Cores
Valve Cores


  • Precision manufactured, American-made housings, valve cores, and caps
  • Applications from low pressure up to 4,000 psi
  • Each valve is pressure- and vacuum-tested on automated assembly equipment
Valve Cores
Valve Cores


Need a Valve?

Schrader Pacific Advanced Valves is here to assist with questions about valve development and manufacturing or standard valve product applications. Standard products can be sourced from any of our distributors.