Differential pressure gauges are fitted to monitor filters and their elements continuously. The degree of pollution of a filter is linked to the rise of the differential pressure across the filter element. A typical differential pressure gauge in a compressed air installation has the following features:
Figure 4.11.2.1
- Simple operation
- No pressure in the dial area
- Pressure surge indication
- No condensate in the dial area
The pressure loss across the filter element during operation is reflected in the differentiated pressure level at filter inlet and outlet. The diaphragm is moved in proportion to the difference in pressure level and also the magnet. The movement is transmitted to the pointer mechanism and made visible.
