Samson 2371-10 Mounting And Operating Instructions page 18

Cleaning and maintenance
Type 2371-10
To open the valve, apply a pressure p
1 bar to the pneumatic unit. This causes the
plug stem to move together with the plug out
of the valve seat. A set point pressure p
must not be applied to the regulator in this
case.
How to proceed:
1. Connect the pressure hose with min.
6 mm diameter to the G
2. Apply a pressure pv = 1 bar to the pneu-
matic stem locking. This causes the actu-
ating unit (17) to move the plug stem to-
gether with the plug out of the valve seat
and open the valve.
3. To switch the valve back to its control
function, remove the pressure p
1 bar) to return the pressure back to at-
mospheric pressure.
4. The spring (16) pulls the actuating unit
back, allowing the plug stem to move
again for the control task.
18
=
V
C
connection.
1
/
8
(=
V
Stem locking disengaged
p = Atmospheric pressure
V
Actuator housing
Stem locking
Pneumatic stem locking · Type 2371-10
8 Actuator housing of Type 2371-10
15 Upper plug section with mechanical stop
16 Spring
17 Actuating unit/diaphragm
p Pressure for stem locking
V
Fig. 8: Pneumatic stem locking
p
V
G connection
1 /
8
17
16
15
8
EB 2640 EN