GCE MediVital Bedienungsanleitung Seite 6

A – INLET STEM
The combination valve is fitted to gas cylinder by a threaded inlet stem. The inlet stem can
be taper threaded or parallel threaded with different size depending on the cylinder size and
material.
B – FILLING PORT
A filling port is provided for filling the gas cylinder at a filling station, it has no function for
EN
patient use. It includes a non-return valve (NRV). The NRV means that special filling adaptors
are required to vent gas from the cylinder during the filling process (venting and/or vacuuming
of cylinders).
C – INLET PRESSURE INDICATOR
Inlet pressure indicator is intended to indicate amount of gas in the gas cylinder. The pressure
indicator is of an active type which means it indicates amount of gas in the gas cylinder whether
the shut-off valve is opened or closed.
D – SHUT-OFF VALVE
The combination valve is provided with a shut-off valve to isolate the gas in the cylinder from
the rest of combination valve functions. It must be opened during cylinder filling and patient's
therapy. Part of the handwheel is an indicator showing open/close status of the shut-off valve.
The shut-off valve open/close status indicator is for guidance only. The shut-off valve may not
be fully off when OFF status is showing. Fully closed status has to be checked by ensuring the
shut-off valve is turned fully clockwise until a firm resistance to rotation is reached and gas
supply to the outlets has stopped.
The shut-off valve must not be used in the "partly ON" status because even though gas is
supplied to the outlets, the flow can be limited due to insufficiently opened shut-off valve.
E – RESIDUAL PRESSURE VALVE
Combination valve is equipped with a residual pressure valve with function to retain a minimum
positive pressure in the gas cylinder to avoid contamination of the cylinder content by
atmospheric air. During cylinder gas ventilation through the filling port the residual pressure
valve is by passed.
F, G – FLOW CONTROL HEAD "F" AND FLOW OUTLET "G" (OPTION)
Combination valve can be delivered with a flow control head "F".This function is used to supply
adjustable gas flow rates (l/min) at atmospheric pressure directly to a patient through the flow
outlet "G", for instance through a cannula or a facemask. The flow outlet "G" is equipped with
hose fitting (hose nipple) or a threaded type (for accessories to be connected via threaded
connection).
Movement of the flow outlet 'G' is normal due to the method of fixing in the main body. It doesn't
indicate a faulty flow outlet.
H – PRESSURE OUTLET OR QUICK COUPLER (OPTION)
The combination valve may be fitted with a pressure outlet. The pressure outlet is supplied with
gas direct from the low-pressure part of the combination valve and it is fitted with a gas specific
medical quick coupling connector also called "quick coupler". The user can connect another
piece of equipment to this outlet with a gas specific male probe (see appendix nr. 2). The quick
coupler self seals when the male probe is disconnected. This outlet is for supplying gas at a
controlled pressure to power medical devices, for instance medical ventilator.
I - PRESSURE RELIEVE VALVE OF LOW PRESSURE PART
Pressure relieve valve secures the low pressure part of combination valve and connected
medical devices against over-pressure. If the gas pressure is decreased enough after the
pressure relieve valve activation, it will closes itself.
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