4
6 B 72 en
5
Valve close and open position
adjustment
In the B1C_K actuator, unlike in the B1C, the upper valve
position limit is adjusted with the spindle nut (51a) secured
with the lock nut (53a). During adjusting, the spindle (50a)
must be in the extreme outer position. Clockwise rotation
open.
In the B1C_L actuator, unlike in the B1C, the lower valve
position limit is adjusted with the spindle nut (51b) secured
with the lock nut (53b). During adjusting, the spindle (50b)
must be in the extreme outer position. Clockwise rotation
to close.
In the B1C_R actuator, unlike in the B1C, the upper and
lower valve position limit is adjusted with the spindle nut
(51a, 51b) secured with the lock nut (53a, 53b). During
adjusting, the spindle (50a, 50b) must be in the extreme
outer position.
6
B1C actuators, sizes 32 to 75
6.1
B1C_RK/RL/RR actuator
The B1C_RK actuator
is otherwise like the B1C except that
it can be operated manually to bring the piston to lower
position in case there is no air supply.
The B1C actuator can be changed into a B1C_RK by replac-
ing the cylinder end (44) accordingly and adding parts
(306…330), see Fig. 4.
The B1C_RL actuator
is otherwise like the B1C except that
it can be operated manually to bring the piston to upper
position in case there is no air supply.
The B1C actuator can be changed into a B1C_RL by replac-
ing the housing (1) accordingly and adding parts
(306…330) see Fig. 5.
The B1C_RR actuator
is otherwise like the B1C except that
it can be operated manually to bring the piston either to
upper or lower position in case there is no air supply.
The B1C actuator can be changed into a B1C_RR by replac-
ing the cylinder end (44) and housing (1) accordingly and
adding parts (306…330), see Fig. 4 and 5.
The manual gear is disengaged when the handwheel is
turned counter clockwise to the extreme position:
B1CRRU32: 377 turns / 90º operation
B1CRRU40: 470 turns / 90º operation
B1CRRU50: 598 turns / 90º operation
B1CRRU60: 598 turns / 90º operation
B1CRRU75: 598 turns / 90º operation
Fig. 2
B1C_LU_ actuator
Parts list for Fig. 2:
Part Quantity
Name
1 1
Housing
50b 1
Spindle
51b
1
Spindle nut (Use as a limit screw)
52b 1
Hand
wheel
53b 1
Lock
nut
54b 1
O-ring
55b 1
Spring
pin
56b 1
Cylindrical
roller
NOTE:
There is some air bleed trough the spindle thread and the
relief valve (58) when the sealing slide (15) with the Orings
(16) is positioned inside the cylinder. I.e. when the valve
has been manually operated to open position during
compressed air loss and then the air pressure is restored.
To stop the leakage operate the manual override to closed
position. See Fig. 3
Fig. 3
Manual overdrive
