Steam End

All the pumps of the Series are duplex (two cylinders) and double-acting and are basically made up of two main parts:

• Steam end
• Liquid end

In the steam end the motion is provided by 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 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.