Cast-iron flanged plungers (air valves) for inlet and outlet of air from the pipeline. DN 50-300, PN 10/16, one-, two- and three-function versions.

| Type | Flanged air valve (plunger) |
|---|---|
| Body material | Cast iron |
| DN | 50-300 mm |
| PN | 10 / 16 bar |
| Connection | Flanged |
| Version | One-, two-, three-functional |
| Purpose | Air intake and exhaust, air plug removal |
| Medium | Water, heating networks |
The plunger removes air from the pipeline during filling and operation and lets in air during emptying, preventing water shocks and vacuum. It is installed at the upper points of the route.
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