Since the beginning of the last century, Peroni has been designing and manufacturing steam driven pumps used for boiler feed service, low NPSHA pump-out service and for other process applications in Petrochemical Plants and in Refineries. All Peroni steam driven pumps are reciprocating, horizontal duplex, double-acting pumps where the power is directly transmitted to the liquid end by the action of the motive fluid on the piston. The motive fluid is normally steam, but can also be air or gas.
The series is constituted by three models: two horizontal duplex, double-acting piston reciprocating pumps for low pressure, one covering the range of low capacity, the other for high capacities.
The third model is a horizontal duplex, double-acting reciprocating plunger pump with opposite plungers for high pressure.
Steam End
The steam end is substantially an integral two cylinders reciprocating steam engine.
Each cylinder houses a steam piston which is connected to a slide valve by a rod and levers. The inlet and the outlet of the steam end are controlled by the slide valve. The steam enters at one side of the steam cylinder through the slide valve and pushes the piston towards the opposite side.
As the piston reaches the end of the stroke, the slide valve reverses the steam flow, which reverses the piston movement. The speed and consequently the number of cycles are strictly proportional to the amount and to the pressure of steam admitted. This speed is regulated by controlling the steam inlet valve.
The steam piston is sturdily connected with the hydraulic piston or plunger that acts on the fluid in the liquid end.