Types and sizes of drum pumps
Our Fast-Flo and Monark drum pumps can be in-line, direcdy immersed
or wall-mounted.
Directly immersed, drum length pumps are designed to empty standard
205 litre drums. The pumps are easy to use and are suitable for
both open-top and closed-top drums. A drum length pump can pass
through the 2" bung of a standard drum and is connected at
the bung by an adaptor that is included with the pump.
Shorter length pumps called stubby pumps are usually in-line or
wall-mounted. A suction hose assembly that can be supplied separately,
is connected to the pump and extends down into the fluid that is
to be pumped. Stubby pumps are suitable for many sizes of containers,
including pails.
Pump Construction
Pumps are available in Carbon Steel or Stainless Steel with packings
to suit your pumping applications.
Flow Rates
Maximum flow rates are approximately 15 litres per minute depending
on a pumping application.
Air-operated Pumps and Ratios
Air-operated pumps are often described by their ratio, e.g. FES
can offer a 1:1 Ratio Fast-Flo pump and a 5:1 Ratio Monark pump.
The ratio refers to a relationship between the air pressure into
the pump and the working pressure on the fluid at the discharge
side of the pump. A 1:1 ratio pump has a fluid working pressure
that is equal to the air pressure. A 5:1 ratio pump has a fluid
working pressure that is 5 times the air pressure.
A pump that produces a higher fluid working pressure, e.g. 5:1,
is used for more viscous fluids and for overcoming long pipe runs
at the discharge side of the pump.
Generally speaking, higher ratio pumps have a lower flow rate than
lower ratio pumps. However, this can sometimes be rectified by changing
to a bigger pump, i.e. one with a more powerful air motor.
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