VI. INSTALLATION SUGGESTIONS
(see Figure 52 APPENDIX A, SUGGESTED PIPING SYSTEM FOR WGI POWER PUMPS)
B. Discharge Piping Design
1. The insertion of a pressure relief valve (PRV) of suitably sized for the full pump capacity and set fully open at a pressure above the required operating discharge pressure of the pump, is mandatory for safe operation.
The PRV should be placed in the discharge line, as close as possible to the pump and before any other valves. The PRV outlet should be piped back to the liquid source.
Suggested trial set pressures of pump PRV's:
Type Pump |
Recommended Relief Pressure |
Double acting Duplex |
Piston pressure rating plus 25 % |
Single acting Triplex |
Plunger pressure rating plus 10 % |
Single acting Quintuplex |
Plunger pressure rating plus 10 % |
2. Install a full opening gate valve on the discharge line to allow pump maintenance.
3. Install a check valve on discharge line to protect pump from harmonic vibration from other installations on the line.
4. Install a properly sized discharge PCT to reduce vibration and piping damage.
5. Securely anchor discharge lines.
6. When possible, run discharge lines straight for at least ten feet before bending.
7. Install a by-pass valve to aid in pump start-up.
8. Use 45 degree long radius ells.
