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3.1 Connection of air supply line
We recommend to supply the air through a hose to the pump. Using moisturized compressed air requires the installation of a service unit
with water separator. This control equipment can additionally be used to regulate the flow capacity of the pump. The diaphragm must not
be subjected to shockloads. For this reason we recommend the installation of a spool, diaphragm or needle valve as shut-off element.
WARNING: pneumatic supply to the Ruby pumps must he made using FILTERED. DRIED. NON LUBRICATED OIL FREE AIR
at a pressure of not less than 2 bars and not more than 7 bars.
WARNING: do not remove RESET for any reason and/or do not connect the air supply to the RESET channel
Warning! Do not use a ball valve as shut-off element
Note: Especially for plastic pumps or pumps with PTFE diaphragms it is highly recommended to install a slow start valve in the
supply line to the pump. This valve protects both the diaphragm and housing parts against suddenly occurring pressure shocks.
3.2 Connection of cuction and pressure lines
Suction and pressure lines must be installed in a way that no additionally loads are applied to the pump ports.
The tightening torque of the mounting screws and the pressure strength of the sockets and flanges must be observed with the installation
of the suction and pressure lines. After assembly check the system for leaks
3.3 Pump in suction operation
Ruby Air Operated Diaphragm Pumps are dry self-priming. Depending on the pump design a suction head of max. 9 m Wc can be reached,
when the suction line is filled.
3.4 Pump in submerged operation
The Ruby Air Operated Diaphragm Pumps are suitable for submerged operation. However, it must be assured that the surrounding fluid
will not attack the pump.
When installing the pump make sure that the air discharge muffler has been removed and the exhaust air is discharged from the fluid
through a hose.
3.5 Connecting to the product circuit
After positioning the pump you can now connect it to the product circuit as follows:
WARNING: only fittings with cylindrical gas threads in materials compatible with both the fluid to be pumped and the pump’s
construction materials must be used.
For example:
Pump made from PP - PP fitting
Stainless steel pump = stainless steel fitting.
1. On the suction and discharge manifold install a manual valve of the same diameter as the pump inlet (never smaller) to intercept the
fluid correctly in case of spills and / or when servicing the pump.
2. Install the sleeves to secure the flexible hoses on both valves.
WARNING: the pump must be connected with FLEXIBLE HOSES REINFORCED WITH A RIGID SPIRAL of a diameter never
smaller than the pump's connection. The filters or other equip-ment installed at the intake side must be suitably dimensioned in
οrder to avoid pressure drops. For negative installations and/or viscous fluids, use hoses with an OVERSIZE DIAMETER, especially
on the intake side. Connections using rigid pipes may cause strong vibrations and break the manifolds
