20DV
Where pump output may be restricted or
blocked entirely, this exclusive Tri-Rotor feature
provides an automatic regulation of flow from
maximum to zero, at minimum pressure, with a constant
speed motor. The variable volume control changes
the length of the stroke of the piston and shuttle
to vary the volume of material displaced by the
pump. With the Manual Flow Control (MFC) pump
capacity can be changed from maximum to zero without
altering the discharge pressure, without by-passing
fluid, and without changing pump RPM. Applications
include; fuel and fuel oils, coolants, feed products,
paints, vegetable oils, solvents, inks, filter
and filter presses. List
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20DX
Referred to as our "Bypass Head"
pump. This specially constructed by-pass consists
of a relief valve of the integral dash pot type
which allow the discharge to be throttled from
full flow to zero, without shock or chatter. This
exclusive type of relief valve does not permit
undue pressures that ordinarily cause internal
wear. This is prevented because the flow of the
liquid is not cramped during the by-pass process.
The relief valve is so constructed that the relief
passage is linked from the suction port of the
pump to its discharge port, permitting a full
flow of the liquid through a separate passage
built into the pump from one chamber to the other
and apart from the body cavity that contains the
pumping members. List
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20D
Our solid head pump for simple transfer
applications. Its fixed pin design delivers a
constant flow rate but requires external protection
if not delivering to an open discharge. The location
of the pin can be modified at time of order allowing
the pump to handle higher viscosity liquids at
full motor speed. List
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