REMKO RT 080, Руководство оператора, Страница: 8 / 40

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Pump performance is adversely affected by increase suction lift, discharge elevation.
And friction losses. See the performance curve and operating range shown on Page 20
to be sure your overall application allows pump to operate within the safe operation
range. -Figure 9.
Materials
Either pipe or hose maybe used for suction and discharge lines: however, the materials
must be compatible with liquid being pumped.
If hose is used in suction lines, it must be the rigid-wall, reinforced type to prevent
collapse under suction. Using piping couplings in suction lines is not recommended.
Line Configuration
Keep suction and discharge lines as straight as possible to minimize friction losses.
Make minimum use of elbows and fittings, which substantially increase friction loss. If
elbows are necessary, use the long radius type to minimize friction loss.
Connections to Pump
Before tightening a connecting flange, align it exactly with the pump port. Never pull a
pipe line into place by tightening the flange bolts and/or couplings.
Lines near the pump must be independently supported to avoid strain on the pump
which could cause excessive vibration, decrease bearing life, and increased shaft and
seal wear. If hose-type lines are used, they should have adequate support to secure
them when filled with liquid and under pressure.
Gauges
Most pumps are drilled and tapped for installing discharge pressure and vacuum
suction gauges. If these gauges are desired for pumps that are not tapped, drill and tap
the suction and discharge lines not less than 500mm from the suction and discharge
ports and install the lines. Installation closer to the pump may result in erratic readings.
To avoid air pockets which could affect pump priming, the suction line must be as short
and direct as possible. When operation involves a suction lift, the line must always
slope upward to the pump from the source of the liquid being pumped: if the line slopes
down to the pump at any point along the suction run, air pockets will be created.
Fittings
Suction lines should be the same size as the pump inlet. If reducers are used in suction
lines, they should be the eccentric type, and should be installed with the flat part of the
reducers uppermost to avoid creating air pockets. Valves are not normally used in
suction lines, but if a valve is used, install it with the horizontal to avoid air pockets.
Strainers
If a strainer is furnished with the pump, be certain to use it; any spherical solids which
pass through a strainer furnished with the pump will also pass through the pump itself.
If a strainer is not furnished with the pump, but is installed by the pump user, make
certain that the total area of the openings in the strainer is at least three or four times the
cross section of the suction line, and that the openings will not permit passage of solids
larger than the solids handling capability of the pump.
This pump is designed to handle up to 63 mm diameter spherical solids.
3. SUCTION AND DISCHARGE PIPING
4. SUCTION LINES