3 Installation
3.1 Installation
WARNING:
•
Equipment that will operate in a potentially explosive environment must be installed in ac-
cordance with the following instructions.
•
All equipment being installed must be properly grounded to prevent unexpected static
electric discharge. If not, a static electric discharge may occur when the pump is drained
and disassembled for maintenance purposes.
3.2 Piping
Never draw piping into place by forcing at the flanged connections of the pump. This may im-
pose dangerous strains on the unit and cause misalignment between pump and driver. Pipe strain will
adversely effect the operation of the pump resulting in physical injury and damage to the equipment.
CAUTION:
Pump must never be throttled on suction side.
WARNING:
NPSHa must always exceed NPSHr as shown on Goulds performance curves received with or-
der. Reference Hydraulic Institute for NPSH and pipe friction values needed to evaluate suction
piping.
Short, direct suction and discharge pipelines and a minimum of elbows and fittings result in the least
amount of pipe friction.
3.2.1 Suction piping
1.
Excessive friction losses will cause cavitation.
2.
Must be kept free of air leaks, particularly in long lines or conditions of high suction lift.
3.
Flow regulating valves must not be located on suction side of the pump.
3.2.2 Discharge piping
1.
Excessive friction losses result in insufficient head.
2.
A check valve should be located in the discharge line to protect the pump from reverse flow and
excessive pressure.
3.2.3 Piping support
The pumps are not designed to carry loads imposed by the weight of the pipeline. Suction and discharge
piping must be supported near the pump, unless otherwise specified. Pumps and subbases can be de-
signed to carry loads due to thermal expansion.
3 Installation
12
Model JC Installation, Operation and Maintenance Instructions
