Samson 42-34 Mounting And Operating Instructions page 32

Mounting and start-up
Î If needle valves are installed in the con-
trol lines, open them before start-up.
NOTICE
!
Risk of valve damage due to a sudden
pressure increase and resulting high flow
velocities.
Slowly open the shut-off valve in the pipeline
during start-up.
Pressure testing the plant
All plant components must be designed for
the test pressure. Remove the regulator from
the pipeline, if necessary.
NOTICE
!
Risk of damage to the diaphragm actuator
due to impermissible excess pressure.
The pressure at the actuator must not exceed
the nominal valve pressure by 1.5 times and
the maximum permissible actuator pressure
on testing the pressure of the plant when the
regulator is already installed. If necessary,
detach the control line and seal the openings
with end plugs. Alternatively, install a shut-
off valve in the control line. Make sure that
the pressure rises simultaneously upstream
and downstream of the regulator to avoid
damaging the balancing bellows.
32
Rinsing the plant
1. After filling the plant, first completely
open the consumer If this is not possible,
open the bypass.
2. Adjust the maximum flow rate at the reg-
ulator (see section 7.1.2).
3. Adjust the maximum differential pressure
at the regulator (see section 7.1.1).
4. Rinse out the pipeline at full flow rate for
several minutes.
5. Check the strainer (e.g. measure the
pressure drop) and clean it, if necessary.
EB 3013 EN