2.10压力控制器 Pressure controls 2.9视镜 Sight glasses shows oil condition, refrigerant charge water in the system Flare or solder connection Hure b-M-Pressure type cuE-a.eut ondensing pressure regulators Differential pressure controls 2.11温度控制 Thermostats temperature regulators thermostat4 2.9 视镜Sight glasses The sight glass shows oil condition, refrigerant charge and subcooling. The indicator shows evencthe smallest amount of water in the system. Flare or solder connection. 2.10压力控制器 Pressure controls 2.11 温度控制器Thermostats Condensing pressure regulators Differential pressure controls Modulating pressure and temperature regulators Electronic expansions valve thermostat