Pressure Transmitter, Pressure Switch, Safety Valve & Pressure Relief Design
Pressure safety components protect compressor and pressure vessel from overpressure explosion under abnormal working condition. High pressure switch: cuts compressor power when discharge pressure exceeds limit; trigger by condenser block, fan fault, overcharge. Low pressure switch: suction pressure protection, stop compressor when suction pressure below setting, avoid running under vacuum. Pressure transmitter: convert pressure signal into 4-20mA, feed real-time pressure to PLC controller for remote monitoring. Safety relief valve: installed on receiver, separator; automatically open to release refrigerant when pressure exceeds rated value. Xiteliduo refrigeration receiver is equipped with safety valve as mandatory safety part for export CE audit. Safety valve discharge pipe must lead outside machine room; direct discharge inside closed room brings suffocation and frostbite hazard. Differential pressure switch is used for oil protection; monitor oil pressure difference, alarm and stop when oil pressure insufficient. Pressure switch setting value cannot be modified randomly; setting must comply with local refrigeration safety code. Refrigeration maintenance & repair company verifies high/low pressure action value regularly and records in equipment log.
FAQ
- What triggers high pressure switch protection? Excessive discharge pressure.
- What triggers low pressure switch protection? Suction pressure too low.
- What is the output signal of pressure transmitter? 4–20mA analog signal for PLC.
- Where is safety relief valve installed? Liquid receiver and pressure vessel.
- Where should safety valve vent pipe discharge to? Outside of machine room.
- What is differential pressure oil switch for? Insufficient lubricating oil pressure protection.
- Can we adjust pressure switch setting arbitrarily? No, must follow safety standard.
- What audit requires safety valve configuration? CE certification for export refrigeration equipment.
