"U" TUBE DIFFERENTIAL PRESSURE GAUGE (MDU)
The device measures pressure greater or lower than the atmospheric one and some differential pressures by reading the difference between the two liquid column levels.
Measuring range: 0 … 400; 0 … 800; 0 … 1200 mm
Filling liquid: distilled water; Mercury
Basic error: ±2mm column of used liquid in manometer
Separation taps: without taps; with three taps; with five taps
There are security devices used to block metallic doors.
Simple manual effort at opening – closing.
Have double safety mechanism.
They are open and closed with a special key.
HYDRAULIC PUMPS FOR PRESSURE GAUGE CONTROL (PVM)