Samson EB 2519 EN, Assembly & Operating Instructions, Page: 23 / 32

EB 2519 EN 23
Operation
Pin
Lever for unlocking
Item no. 1490-7399
Unlock
Fig. 8: Lever for unlocking
6.2 Unlocking after a fault
6.2.1 Unlocking the pressure
limiter
To unlock the pressure limiter, the following
conditions must be met:
− The pressure must fall approx. 0.5 bar
below the limit.
− The pressure is >1 bar.
To unlock the pressure limiter, proceed as fol-
lows:
1. Rectify the fault.
2. Place the lever for unlocking at the pins
at the side on the connecting element (8)
(see Fig. 8). Pull the lever upward until
the spring mechanism is tensioned. The
side pins are pushed downward and the
spring assembly compressed. The pres-
sure limiter is unlocked.
6.2.2 Unlocking the safety
pressure limiter
The safety pressure limiter is tested as a spe-
cial construction according to section 3.3 of
VdTÜV Code 100 (pressure). The trigger ele-
ment with spring return mechanism can also
be fitted with an additional component to
add the additional function of a safety tem-
perature limiter according to DIN EN 14597
in addition to a safety pressure limiter.
In all cases, the safety pressure limiter or
safety temperature limiter must act on a
SAMSON valve.
As soon as the adjusted pressure limit is
reached or, for example when the capillary
tube breaks or when leakage occurs in the
pressure measuring system, the valve is
closed and locked by the spring mechanism.
1. Rectify the fault.
2.
Apply a pressure of at least 1 bar and
approx. 0.5 bar below the adjusted limit
to the connection of the capillary tube.
3. Place the lever for unlocking at the pins
at the side on the connecting element (8)
(see Fig. 8). Pull the lever upward until
the spring mechanism is tensioned. The
side pins are pushed downward and the
spring assembly compressed. The safety
pressure limiter is unlocked.
Note