| BYPASS
HEAD MODEL 20DX, 20CPX
This Tri-Rotor pump model
has an intergral dashpot relief valve-in-head.
The standard spring can be set up to 60
PSI at which pressure it will bypass full
volume; the heavy duty spring can be set
up to 100 PSI.
TO ADJUST
BYPASS RELIEF PRESSURE
Remove hexagonal
cap (A) and loosen locknut. Turn adjusting
screw (B) in to increase pressure and
out to decrease pressure. With:
Standard Spring, #J941, (min. 5PSI/Max.
60 PSI). Each full turn represents approx.
2 PSI. Do not exceed 16 total turns.
Heavy Duty Spring, #J2010, (Min.
50 PSI/Max. 100 PSI). Each full turn represents
approx. 7 PSI. Do not exceed 11 total
turns.
Tighten locknut
and replace the hexagonal cap, making
sure J1014 gaskets are in place.
TO REVERSE DIRECTION OF ROTATION 20DX,
20CPX
The rotation of the 20DX, 20CPX
pump may not be revesed in the field for
extended periods of time. The pump may
be run in reverse TEMPORARILY for
such purposes as stripping the lines,
etc.
- To reverse direction
of rotation, a bypass head pump of opposite
rotation must be ordered from factory.
See "putting pump into service"
section on page 1.
SOLID
HEAD MODEL 20D, 20CP
The model 20D, 20CP
has a solid head with the shuttle pin
set in a fixed position to give constant
volume for simple transfer service. A
RELIEF VALVE SHOULD BE INSTALLED IN THE
DISCHARGE LINE FOR PROTECTION.
TO REVERSE
DIRECTION OF ROTATION 20D, 20CP
The rotation of the 20D,
20CP pump may not be reversed in the field
for extended periods of time. The pump
may be run in reverse TEMPORARILY fo such
purposes as stripping the lines, etc.
- To reverse the direction
of rotation, a solid head pump of opposite
rotation must be ordered from the factory.
See "putting pump into service"
section on page 1.
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