Discharge Piping Checklist - Goulds Pumps 3700 Installation, Operation And Maintenance Manual

Installation
Example: Suction piping equipment
Correct
1. Suction pipe sloping upwards from liquid source 1. Air pocket, because the eccentric reducer is not
2. Long-radius elbow
3. Strainer
4. Foot valve
5. Eccentric reducer with a level top

Discharge piping checklist

Checklist
Check
Check that an isolation valve is in-
stalled in the discharge line.
Check that a check valve is installed in The location between the isolation valve and the
the discharge line, between the isola- pump allows inspection of the check valve.
tion valve and the pump discharge
outlet.
If increasers are used, check that they See Example: Discharge piping equipment for
are installed between the pump and
the check valve.
If quick-closing valves are installed in
the system, check that cushioning de- hammer.
vices are used.
32 Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Incorrect
used and because the suction piping does not
slope gradually upward from the liquid source
Explanation/comment
The isolation valve is required for:
• Priming
• Regulation of flow
• Inspection and maintenance of the pump
See Example: Discharge piping equipment for
illustrations.
The check valve prevents damage to the pump and
seal due to the back flow through the pump, when
the drive unit is shut off. It is also used to restrain
the liquid flow.
See Example: Discharge piping equipment for
illustrations.
illustrations.
This protects the pump from surges and water
Checked
Manual