New Norgren Herion Ventilation Protector

Norgren Herion Protect Valves and Systems with their New Ventilation Protector

In outdoor installations, pilot air may not be directed into the environment without a protective system for the control units. Aggressive ambient air or moisture, which can lead to corrosion or ice build-up, may not reach the interior of the system; dirt and dust must also be prevented from penetrating and insects from nesting in the exhaust air channels. Traditional mufflers can prevent influences like the entry of insects, but they can only keep aggressive ambient air out under certain conditions. Their use outdoors is also hindered by their porous structure, which allows water to enter and even freeze in the muffler material (sintered plastic or steel).

The new ventilation protector from Norgren allows exhaust air to escape with minimal restriction, it reduces the noise during ventilation, and it reliably eliminates the influences listed above. Its efficient working principle corresponds to that of a check valve. When the valve is not ventilating, silicone rings seal the ventilation openings in the protective system. During ventilation, the escaping air forces the silicone rings away from the openings; they then seal tight again after the air as escaped.

The compact ventilation protector is screwed directly into the exhaust ports of the valves. It is available in two designs: For switching valves with nominal sizes up to 6mm and for switching valves with nominal sizes up to 12mm. The connecting threads are designed to fit NPT and G threads.

Additional features at a glance:
- Low weight
- Mechanically stable
- Broad range of temperatures: -55° C to +80° C
- operating pressure of 0 to 10 bar
- Materials are POM (plastic body) and silicone (O-ring), resulting in a broad compatibility range
- UV-stable, i.e. high resistance to aging from intensive sunlight

Norgren UK
Tel: 01543 265000

Published in Valve User Magazine Issue 12

Summer 2020 // Issue 53
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