Vetter Lifting bags 1 bar (14.5 psi) Test Equipment - Manual (Page 11)

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system is ready for the test. Close both ball valves on the test and
ventilation head.
Close ball
valve
5.2.3 Carrying out the test
Before beginning the water pressure test the reserve
tank of the hand pump should be filled to at least 75 %.
Close back-flow valve using the black hand wheel (B). Position the
ball valve (A) of the hand pump horizonatally and open the blo-
cking valve on the water supply location. If the ball valve (A) is
positioned vertically then the water will flow to the test and ven-
tilation head.
ATTENTION! Fill the bag only when it is in
the laying position. If it is in the standing
position and it falls then the manometer
could be damaged.
Open the water supply valve (A). The mini lifting bag is now com-
pletely filled with water. If the manometer clearly indicates an in-
crease in pressure then the mini lifting bag must be ventilated.
The water supply valve is closed for ventilation and the mini lifting
bag must be positioned so that the valve connection is pointing
upwards.
If the ventilation valve (B) is now opened then the air remaining in
the bag can escape. By alternating between the ball valves (A and
B) it can be ensured that there is no air remaining in the bag.
If the bag to be tested is completely ventilated then the bag can
be filled to the maximum possible water pressure (network pres-
sure) after opening the water supply valve (A) on the test and ven-
A
B
ZU
AUF
A
B-