Operating instructions

1 2

P_SI_0019

Fig. 9: Integral relief valve

1 Spring, large

2 Ball

3 Rotary dial

4 Spring, small

5 Hose connection

5.4 Multi-layer safety diaphragm

The multi-layer safety diaphragm has the same function as the conven‐

tional double diaphragm system with working and safety diaphragms; how‐

ever it also has the advantage that both diaphragms are joined together in

a single unit.

If the working layer (1) breaks, the feed chemical penetrates between the

working and safety (2) layers and spreads out. The safety layer ensures

that not feed chemical penetrates to the outside.

As soon as the feed chemical reaches the flap (3) on the edge of the multi-

layer safety diaphragm, it inflates it. The flap presses a piston (4) in the

membrane rupture sensor (5), so that this triggers.

With the visual diaphragm rupture sensor, the lowered red cylinder (6)

springs forward beneath the transparent cover (7) so that it then becomes

clearly visible - see Fig. 10.

With the electrical

diaphragm rupture sensor, a switch is switched. A sig‐

nalling device must be connected to signal the diaphragm rupture.

Fig. 10: Visual diaphragm rupture sensor, triggered and untriggered

Functional description