Vetter Wedge Lifting bags - Manual (Page 7)

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The basic condition for a stable, different control of both bags is
the separate independent control using the corresponding dual
controller.
Wedge Lifting Bags 1 bar/14.5 psi are subject to the requirements
specified in DIN EN 13 731. This requires the following with a con-
troller:
5.2.4.6 When the operating device of a controller is released then it
must immediately return to the „neutral „ position
automatically.
The so called „deadman switch“ was introduced as a compulsory
fitting to meet the requirements of this standard.
(Picture: Air Cu 1 bar deadman)
4. Operating Instructions
4.1 Operation with compressed air bottle
200 bar or 300 bar
Connect the pressure reducer to the compressed air bottle,
200 bar or 300 bar, using the tommy screw (1). Close the presser
reducer (2). Open the valve on the bottle (3). The pre-pressure ma-
nometer (4) indicates the pressure in the bottle.
Adjust the back pressure to approximately 2 bar with the regula-
tion bar (5) (indication of the reduced pressure on the back pres-
sure manometer (6)).
Connect the air hose of the pressure reducer via the nipple to the
input coupling (7) of the controller. In doing this, press the nipple
into the coupling until you feel it lock in. For additional safety: turn
the brass sleeve (8) so that it is opposite the safety pin (9).
Open the hand wheel (2) of the pressure reducer.
The lifting bag system is ready for operation.
To inflate the wedge lifting bag pull the lever (11) back, resp. slow-
ly open the ball valve at the fitting controller. Observe the mano-
meters (10) and the load.
If the required pressure is reached for lifting or if the lift height is
achieved, then end the inflation sequence by close the ball valve.
The switch lever of the controller with the deadman switch will
automatically go back to the zero position.
An integrated safety valve will automatically activate when the
bag is unintentionally over-inflated above the maximum opera-
ting pressure (1 bar/14.5 psi) or when there is an increase in bag
pressure due to additional loading of the bag. The activation tole-
rance for opening and closing of the safety valve must not exceed
+/- 10 %.