Protecting Your System; Protecting The Vacuum Breaker; Setting The Valve; Maintenance - Mankenberg VV Serie Originalbetriebsanleitung

Original operating manual
Vacuum breaker VV

14.7 Protecting your system

If toxic or hazardous media are used measures must be taken to ensure that in the case of cone failure the
hazardous medium can be drained in a controlled and safe manner. In such a case we reccomend our type 33
with closed valve body and spring cap.

14.8 Protecting the vacuum breaker

Being open to atmosphere, the air intake ports must be sufficiently protected from dust, water, dirt, small
animals as well as weather effects. If there is a danger of freezing the vacuum breaker should by fitted with a
heating-jacket.

14.9 Setting the valve

The performance curves shown in the flow capacity diagram relate to fully open valves. To obtain these values
under partial load conditions, the operating pressures on the scales of valve types 34 and 35 should always be
set 0.05 bar below the pressures given in the diagram. The reason for this is the spring force which increases as
the flow and cone movement increase.

14.10 Maintenance

Vacuum breakers should be cleaned and serviced regularly. Depending on the ambient operating conditions,
the valve spindle should regularly be checked for freedom of movement. The service intervals should be
specified in a maintenance schedule.

14.11 Valves free of oil and grease or silicone

Please pay attention to order an fit only spares free of oil and grease resp. free of silicone.
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VV-4.X.22.3 Issue 01.09.2022 www.mankenberg.com