Keep the cooling system at a higher or more efficient temperature under system pressure applicable to the full pressure range(lightweight, standardized, reliable,stable) and maintain system pressure (top-of-the-line automation and injection molding)
Limit the pressure level in the cooling circuit by a spring valve
Limit the negative pressure level in the cooling circuit by a spring valve
The cap is assemble by screwing at the top of the degas bottle, and is so the single point where the cooling circuit can be filled