Mode Of Function - Bola E 683-18 Operating Instructions Manual

BOLA Pressure-Relief Valve
» Load the requested opening pressure to the pressure relief valve. It
can range between 0.1 and 10 bar.
» Turn the adjusting screw (2) slowly counterclockwise. Watch the
water. As soon as bubbles can be seen in the water, the valve is
open. The valve's opening pressure is now set to the same pressure
as your compressed air service unit.
» Fix the adjusting screw (2) with the locking nut (1). Tighten the
locking nut (1) by turning it clockwise with two fingers.
» Check whether the manual ventilation works. Pull the toggle (4).
The passage is open. Upon releasing the toggle, the passage is
closed immediately.
Please note: the higher the pressure is set, the more power is
»
needed to pull the toggle (4). It can be moved only for a few tenths
of a millimetre.

4. Mode of function

The valve is sealed by a membrane with an integrated O-ring. The opening pressure is set by turning the adjusting screw
(2) and thus changing the tension applied to the integrated spring. The more the spring is bent respectively the stronger
the adjusting screw (2) is closed, the higher is the opening pressure.
By pulling the toggle (4), the membrane is lifted. The passage is open for a short time.
9
2
2
1
4