Pressure Test; Insulation - Samson 44-7 Mounting And Operating Instructions

5.5.2

Pressure test

Note
The plant operator is responsible for
performing the pressure test. SAMSON's
After-sales Service can support you to plan
and perform a pressure test for your plant.
NOTICE
!
Risk of the operating diaphragm bursting
due to excessive pressure during pressure
testing.
− The pressure must not exceed the maxi-
mum permissible pressure by 1.5 times the
pressure rating.
− Remove the control line from the regulator
and seal the open connection with a blank-
ing plug (accessories: blanking plug 8323-
0030 and seal 8412-0771).
NOTICE
!
Risk of regulator damage due to a sudden
pressure increase and resulting high flow ve-
locities.
Î Slowly open the shut-off valves.
During the pressure test, make sure the fol-
lowing conditions are met:
Î Do not allow the pressure to exceed the
1.5 times the pressure rating of the valve
body.
Î Remove the control line from the regula-
tor and seal the open connection with a
blanking plug (accessories: blanking
plug 8323-0030 and seal 8412-0771).
EB 2723 EN
Î Make sure that the pressure rises simulta-
neously upstream and downstream of the
regulator to avoid damaging it.

5.6 Insulation

To insulate cold systems, we recommend first
filling the plant and carefully rinsing it. The
regulator must not yet be insulated at this
stage.
NOTICE
!
Risk of regulator damage due to incorrect
insulation.
Î Only insulate the regulator up to the ac-
tuator housing for medium temperatures
below 0 °C/32 °F or above
80 °C/175 °F.
1. Start up the plant and adjust the set point
(see section 6).
2. Shut down the plant again and let it heat
up until the condensation water has
dried off.
3. Insulate the regulator and pipes convey-
ing the process medium using insulation
material with a water vapor barrier. If an
external control line is to be routed
through the insulation, special care must
be taken with the sealing since slight
changes in shape may occur. The insula-
tion thickness depends on the medium
temperature and the ambient conditions.
50 mm is a typical thickness.
Mounting
25