Installation (Continued)
These pumps develop very high
pressures. Be sure to confirm that
pressure rating of all piping and fittings
is adequately sized before use. Rating
must be sufficiently larger than the
combination of both inlet pressure plus
the maximum pressure pump can
develop.
Piping and/or
pipe fittings with
an insufficient pressure rating may burst
and cause personal injury and/or
property damage.
MAXIMUM INLET PRESSURE
“1” Series
2 to 25 ........ 335 ft./145 psi [1000 kPa]
27 stage ...... 500 ft./217 psi [1500 kPa]
“3” Series
2 to 15 ........ 335 ft./145 psi [1000 kPa]
17 to 25 ...... 500 ft./217 psi [1500 kPa]
“5” Series
2 to 9 .......... 335 ft./145 psi [1000 kPa]
10 to 29 ...... 500 ft./217 psi [1500 kPa]
If system pressure has potential to
exceed number listed above, then a
check valve is required on discharge side
of pump. This will ensure that proper
inlet pressure is maintained when pump
shuts off.
MAXIMUM OUTLET PRESSURE
If system pressure in excess of
536 ft./232 psi [1600 kPa] is possible,
then it is necessary to provide means to
prevent this. Examples include a bypass
valve or pressure switch on discharge of
pump set at or below this number.
Operation
Become familiar with pump components
(See Figure 3).
Vent Plug (Ref. No. 13)
– Used to purge
air from pump.
Wash Plug (Ref. No. 11)
– Used in
applications where seal wash is
desired to extend life of shaft seal.
Bypass Valve (Ref. No. 42)
– Connects
suction and discharge sides of pump,
making filling/draining procedure
easier. During operation, bypass
valve must be closed.
PM1, PM3, and PM5 Series
Multistage Centrifugal Pumps
Vertical Inline Models
Specifications Information an
d Repair Parts Manual
PM1, PM3, and PM5 Series
Multistage Centrifugal Pumps
Vertical Inline Models
Dimensions Inches [cm]
“1” Series
1” NPT
1” NPT
1/2 thru 3
8 gpm [30 lpm]
“3” Series
1” NPT
1” NPT
1 thru 5
16 gpm [61 lpm]
“5” Series
1¼” NPT
1¼” NPT
2 thru 7½
30 gpm [114 lpm]
NOTE: All dimensions have a tolerance of ±1/8” [0.3].
(*) Standard NPT (female) pipe thread.
Model Suction*
Discharge*
HP
Nominal
Flow
2
Figure 2 - Dimensions
