PRESSURE REGULATORS SERIES 33

PRESSURE REGULATORS SERIES 33 Setting screw Brass valve body Main steel spring Steel balancing bellows Application Castel series 33 pressure regulators ensure constant pressure on low and high pressure lines. Pressure intake 1/4" SAE 5 types of regulators are available: 3310 capacity regulator. 3320 crankcase pressure regulator. 3330 evaporating pressure regulator. 3340 condensing pressure regulator. 3350 liquid receiver pressure regulator. ey are used in air conditioning and refrigerating systems, and are compatible with HFC and HCFC refrigerants. Benets Copper connections, welded and SAE threaded...

SERIES 3310 CAPACITY REGULATOR OPERATING PRINCIPLE Regulates system capacity with reduced loads. Reduces compressor start-up. Prevents excessively low evaporation pressure The capacity regulator opens as suction pressure decreases. Regulation depends on outgoing pressure only. The regulator is installed as a bypass between compressor discharge and suction line. The regulator opens as evaporation pressure decreases. Note: there must be a liquid injection valve for desuperheating suction line gas. The regulator may also be installed as a bypass between compressor discharge and the expansion valve...

SERIES 3320 CRANKCASE PRESSURE REGULATOR PURPOSE OPERATING PRINCIPLE Prevents excessively high suction pressure during start-up and therefore overloading of the compressor motor. Limits compressor suction pressure after defrosting. e regulator opens as regulator output pressure (suction pressure) decreases. Installation Refrigerating systems for applications with low evaporation temperatures. e regulator is installed on the suction pipe upstream of the compressor. e regulator opens when suction pressure drops below the calibrated value. CRANKCASE PRESSURE REGULATORS Part number Connections SAE...

SERIES 3330 EVAPORATING PRESSURE REGULATOR PURPOSE OPERATING PRINCIPLE Keeps evaporation pressure and therefore evaporator surface pressure constant. Prevents excessively low evaporation pressures and therefore the risk danger of freezing in air evaporators. Dierentiates evaporation pressure for multiple evaporators in systems with a single compressor. e regulator is installed on the suction line, and opens when incoming pressure increases, that is, when evaporator pressure exceeds the calibrated value. Installation (1) Refrigerating systems with a single compressor serving multiple evaporators...

SERIES 3340 CONDENSING PRESSURE REGULATOR PURPOSE OPERATING PRINCIPLE To keep condensation pressure constant in the air condenser in the presence of low ambient temperatures. In a refrigerating system with an air condenser installed in a very cold environment, facilitates start-up after a long shutdown.Permits heat recovery. Balances pressure in systems with automatic defrosting. e regulator opens as pressure increases at the valve inlet, that is, when condenser pressure exceeds the calibrated value. Installation (1) Installation (2) Refrigerating systems with air condensers. e regulator is installed...

SERIES 3350 LIQUID RECEIVER PRESSURE REGULATOR PURPOSE OPERATING PRINCIPLE Combined with condensation regulator 3340, it keeps receiver pressure constant in "me regulator opens when receiver pressure decreases. systems with heat recovery and air and water condensation. Refrigerating systems with air condenser, "me regulator is installed as a bypass between compressor discharge and the liquid receiver inlet. RECEIVER PRESSURE REGULATORS