Good Practice
NOTE: These are general guidelines and do not cover all possible situations.
It is the responsibility of the system integrator to apply this product properly.
Plumbing
1.The inlet pipe should be as short and straight as possible to minimize suction pressure losses. Excessive restrictions at the inlet can cause cavitation resulting in poor performance, noise, vibration, or pump damage.
2.Slope the inlet plumbing appropriately to avoid air pockets.
3.Plumbing weight, misalignment with the ports or thermal expansion can exert excessive force on the pump. Plumbing must be properly supported and aligned with expansion joints, if required, to minimize these forces.
4.To prevent over pressure situations, install a relief valve as close to the pump outlet as possible. Install the relief valve before any
valves.
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Separate Pump and Drive Assemblies
Driveline Guards
1.Assure adequate guards have been installed to prevent personnel contacting moving components.
2.Follow all OSHA, Federal, state and local codes.
Check Alignment of Pump to Driveline
Excessive misalignment can overload the pump input shaft and cause premature failure. The figures below show parallel and angular misalignments.
Parallel | Angular |
Mounting Base
1.Mount the unit on a rigid, heavy base to provide support and absorb shock. Bases should be designed for high rigidity, not just strength.
2.The pump feet were not designed for mounting to concrete and do not have enough contact area to prevent concrete from failing. When mounting to cement or concrete, use a steel base plate (supplied by others) to distribute the mounting stress over an area large enough to prevent the cement from failing. The base plate should be at least as thick as the pump feet. Grout it in place.
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Roper Pumps’ Close Coupled Drives
Hydraulic drive units where the drive mounts directly to the pump
•Driveline is not exposed and does not require guards.
•Alignment between pump and drive line is maintained by the assembly.
•Because the assembly absorbs reaction forces of the driveline, the mounting base does not need to be as robust. The level of rigidity and strength is determined by the piping stresses from the system.
Injection Hazard: Do not try to stop a leak with your hand! Avoid any close contact with hydraulic fluid jets. Escaping fluid can penetrate skin, causing serious injury. In case of accident, see a doctor immediately for removal of fluid.
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