... pressure gauges are suitable for measuring the pressure of liquid, gas, and steam or vacuum, which are non-crystalloid and non ... Φ40,Φ50,Φ63 and Φ100 5.Flange Φ40,Φ50,Φ63,Φ100 and Φ160Special versions:1.With retard scale spacing ,adjustable green sector and red ... mark pointer for heating systems,2.With additional temperature scale for refrigerants in °C3.With othe unit according requirement,such as ...