Specifying Nominal Diameter; Specifying Pipe Lengths; Changes In Cross-Section And Direction; Safety And Control Devices - Ohio Medical Corporation SM30B Operating Instructions Manual

5.5.2 Specifying nominal diameter

 Size of suction/pressure connections (→ Operating
connections, page 29)
▶ Keep the fl ow resistance in the pipes as low as possible.
1. Nominal suction pipe diameter ≥ nominal suction
connection diameter
2. Nominal pressure pipe diameter ≥ nominal pressure
connection diameter.

5.5.3 Specifying pipe lengths

1. Dimension the suction, pressure and operating liquid
pipes as short as possible.
2. Increase the pipe cross-sections when using long
suction, pressure and operating liquid pipes.
 Th e pressure pipe must not rise more than 1 ft vertically
or diagonally upwards.

5.5.4 Changes in cross-section and direction

1. Avoid radii of curvature of less than 1.5 times the
nominal pipe diameter.
2. Avoid sudden changes of cross-section and direction
along the piping.

5.5.5 Safety and control devices

5.5.5.1 Avoiding contamination
1. Integrate low-resistance fi lters in the suction pipe.
2. Install a diff erential pressure gauge with contact
manometer to monitor the contamination process.
5.5.5.2 Avoiding backfl ow
▶ Install a ball check valve between the suction pipe and
the suction connection of the aggregate to prevent
operating liquid from fl owing back into the suction pipe
aft er aggregate shut-down.
5.5.5.3 Provisions for isolating and shutting off pipes
 For maintenance and repair works
▶ Provide for shut-off devices in the suction, pressure and
process water pipes.
5.5.5.4 Provisions for measuring operating conditions
1. Provide for manometers in the suction and pressure
pipe to allow for pressure measuring.
2. Provide for a power sensor at the motor side.

5.6 Connecting pipes

5.6.1 Providing for clean piping

C AU T I O N
Risk of material damage caused by aggregate
contamination!
▶ Make sure the inside of the aggregate is kept free of
contamination.
1. Clean all piping parts and fi ttings prior to assembly.
2. Make sure no fl ange seals project inwards.
3. Make sure no sealing material (sealing tape, adhesive)
projects inwards.
4. Remove any blank fl anges, plugs, protective foils and/or
protective paint from the fl anges.

5.6.2 Installing suction pipe

1. Remove transport and sealing covers from the
aggregate.
2. Avoid air pockets: lay out the pipes with a continuous
slope down to the aggregate.
3. Make sure no seals project inwards.
4. Make sure no sealing material (sealing tape, adhesive)
projects inwards.
5. Install a ball check valve in the suction pipe to prevent
operating liquid from fl owing into the suction pipe at
standstill.

5.6.3 Installing pressure pipe

1. Remove transport and sealing covers from the
aggregate.
2. Install the pressure pipe.
3. Th e pressure pipe must not rise more than 0.3 m
vertically or diagonally upwards.
4. Avoid air pockets: lay out the pipes with a continuous
slope from the aggregate.
5. Make sure no seals project inwards.
6. Make sure no sealing material (sealing tape, adhesive)
projects inwards.

5.6.4 Stress-free pipe connection

 Provide for a stress-free pipe connection in accordance
with VDMA standard sheet 24277.

5.7 Electrical connection

 RISK OF ELECTRIC SHOCK
Risk of death from electric shock!
▶ Any electrical works must be carried out by qualifi ed
electricians only.
▶ Observe the IEC 30364 (DIN VDE 0100) and for
potentially explosive areas the IEC 60079 (DIN VDE
0165) standard.
Risk of death from rotating parts!
▶ Make sure to only operate the aggregate with all covers
fan hood) installed.
16 255548 Rev.1
 D A N G E R