The working principle of the vacuum interface unit is very much the same as that of the vacuum toilet.
The manually operated push button is replaced by the activator which reacts through its diaphragm, being triggered when a static head of 80mm has been built up in the grey water tank. The activator transfers the operating vacuum to the plunger diaphragm so that the discharge valve opens. After 3 seconds the activator shall close the supply of the operating vacuum to the discharge valve which immediately closes. When the liquid level in the tank has reached approx 80mm, the cycle is repeated.
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Vacuum interface valves
Vacuum interface valves are available in 2 and 5 liters. The tank of 2 liter unit (upper picture on the left) is made of polypropylene and the tank of the 5 liter unit (lower picture on the left) is made of corrosion resistant AISI 316. Both of the vacuum interface valves include proven Evac pneumatic flush mechanism with flush memory and vacuum sensor technology. No electricity is needed. Vacuum interface valves consist of simple, reliable components with easy, time-saving and cost-effective maintenance.
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Floor and shower drain
Shower drain can be used as a gravity floor drain but it can be connected directly to vacuum drainage system.
Construction of the shower drain is simple. The tank of the shower drain is made of corrosion resistant AISI 316.
