Castel – 3030/44C173 – 17.3 bar Safety Relief Valve, ½″ NPT×¾″ G, PS 55 bar

The Castel /C is a fixed-pressure safety relief valve tailored for refrigeration, air conditioning, and HVAC systems. It features a ½″ NPT inlet and ¾″ G outlet, factory-set to open at . bar with a maximum allowable pressure (PS) of  bar—ideal for protecting condensers, piping, and receivers.

Key Features:

• Model / P/N: /C (. bar set pressure)  

• Connections: ½″ NPT threaded inlet × ¾″ G threaded outlet ()

• Set Pressure: . bar

• Max Allowable Pressure (PS):  bar  

• Adjustability Range (/C): – bar; this unit is fixed at . bar  

• Body Material: Brass with PTFE-seated, direct spring-loaded mechanism (unbalanced design)  

• Orifice & Flow:  mm² orifice, discharge coefficient Kd .  

• Temperature Range: – °C to + °C  

• Standards & Compliance: Complies with EN , PED //EC, and ASHRAE A refrigerant group