KSB Delta Primo F, Installation And Operating Manual

Page: 21 / 80

5 Installation at Site
21 of 80
KSB Delta Primo
1983.811/02-EN
5.4.1 Fitting an expansion joint (optional)
DANGER
Sparks and radiant heat
Fire hazard!
▷ Take suitable precautions to protect the expansion joint if any welding work is
carried out.
CAUTION
Leaking expansion joint
Flooding of installation room!
▷ Do not apply any paint to the expansion joint.
▷
Keep the expansion joint clean.
▷
Regularly check for cracks or blisters, exposed fabric or other defects.
ü Sufficient clearance in all directions is provided for checking the expansion joint.
ü The expansion joint is not insulated along with the pipeline insulation.
1. The expansion joint has a length limiter with solid-borne sound insulation.
2. Install the expansion joint in the piping free of twist or distortion. Never use the
expansion joint to compensate for misalignment or mismatch of the piping.
3. Evenly tighten the bolts crosswise. The ends of the bolts must not protrude from
the flange.
5.4.2 Fitting the pressure reducer (optional)
NOTE
A pipe length of approximately 600 mm must be provided on the inlet side to
accommodate a pressure reducer, if necessary.
NOTE
A pressure reducer must be installed if the inlet pressure fluctuation is too high for
the pressure booster system to operate as intended or if the total pressure (inlet
pressure and shut-off head) exceeds the design pressure.
The inlet pressure (p
inl
) varies between 4 and 8 bar. A minimum pressure gradient of
5 m is required for the pressure reducer to function properly. This means that the
pressure reducer must be mounted 5 m higher than the pressure booster system. The
pressure drops by about 0.1 bar per metre of height difference. Alternatively, the
pressure reducer can be subjected to a pressure of 0.5 bar.
Example p
inl
= 4 bar
Minimum pressure gradient = 5 m ≙ 0.5 bar
Downstream pressure: 4 bar - 0.5 bar = 3.5 bar.
ü
A minimum pressure gradient of 5 m is available.
1. Install the pressure reducer in the pipe on the inlet side.