Instruction Manual
2727
The design of the vent valve is essential to ensure that the entrapped air pockets are released. Pneumatic
valves or vacuum switches should be avoided. Instead, it is preferable to use combined
pneumatic valves that incorporate an automatic orifice, as well as a large kinetic orifice. These valves ensure
that the largest volumes of air are released quickly and eectively while filling the pipe.
Fig. 36 Typical combined air vent valve, designed with automatic and kinetic air release functions
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