Roper G12-436 - Manual (Page 2)

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 shut-off
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.
Over-pressure may burst pump or
system components. Always include
a relief valve in installation. Do not
over pressurize pump or block
discharge line while running.
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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