Neles B1C K Operating and maintenance manual

6 B 72 en • 9/2015
HAND WHEEL OPERATOR
For cylinder actuators
Types B1C_K/L/R and B1C_RK/RL/RR
Installation, Maintenance and
Operating Instructions

26 B 72 en
Table of Contents
1 GENERAL .............................................................. 3
2 SAFETY PRECAUTIONS ....................................... 3
3 B1C actuators, sizes 9 to 25 ................................ 3
3.1 B1C_K/L/R actuator ............................................. 3
4 Maintenance ........................................................ 3
5 Valve close and open position adjustment ...... 4
6 B1C actuators, sizes 32 to 50 .............................. 4
6.1 B1C_RK/RL/RR actuator ...................................... 4
7 Maintenance ........................................................ 5
8 Valve close and open position adjustment ...... 5
READ THESE INSTRUCTIONS FIRST!
These instructions provide information about safe handling and operation of the cylinder unit.
If you require additional assistance, please contact the manufacturer or manufacturer's representative.
Addresses and phone numbers are printed on the back cover.
SAVE THESE INSTRUCTIONS!
Subject to change without notice.
All trademarks are property of their respective owners.

6 B 72 en 3
1 GENERAL
These manual hand wheel operators are designed for
Metso B1C-actuators. Hand wheel operator is intended to
be used for operating the pneumatic actuator in case of
supply power (air) or signal (air, electric) failure takes place.
These instructions contains the information needed for
operating the hand wheel operator, additional information
on B1-actuators are available from the instructions on
installation, operation and maintenance of the model in
question. See the IMO 6BC71en.
Manual hand wheel operator can be recognized from type
codes as follows: letter K and RK in type code is for hand
wheel on cylinder head, letter L and RL means that hand
wheel is installed on the bottom of the housing and R and
RR means that hand wheel is on both cylinder head and
bottom of the housing.
2 SAFETY PRECAUTIONS
3 B1C actuators, sizes 9 to 25
3.1 B1C_K/L/R actuator
The B1C_K actuator is otherwise like the B1C except that it
can be operated manually to bring the piston to lower posi-
tion in case there is no air supply.
The B1C actuator can be changed into a B1C_K by replacing
the cylinder end (44) accordingly and adding parts (33a,
50a to 56a), see Fig. 1.
The B1C_L 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_L by replacing
the housing (1) accordingly and adding parts (50b to 56b),
see Fig. 2.
The B1C_R 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_R by replacing
the cylinder end (44) and housing (1) accordingly and add-
ing parts (33a,50a to 56b), see Fig. 1 and 2.
4 Maintenance
If air escapes between the spindle (50a) and spindle nut
(51a), check the O-ring (54a) and replace it if necessary. Also
check the condition of the cylindrical roller (56a). See Fig. 1
and 2. Other maintenance as described for the B1C actua-
tor, see the IMO 6BC71en and the section 4.
CAUTION:
Before operating the hand wheel make sure it is per-
mitted to manually operate the valve (without disturb-
ing the process).
CAUTION:
Air pressure must always be released before operating
manual hand wheel operator!
CAUTION:
Be careful when adjusting actuator travel stops. The
spindle nut (51) may come out if turned too much. If
the actuator is pressurized it can cause uncontrolled
pressure release which may result in damage or per-
sonal injury.
NOTE:
There is some air bleed trough the spindle thread when
the spindle (50a) with the O-ring (54a) is positioned inside
the cylinder. I.e. when the valve has been manually oper-
ated to open position during compressed air loss and
then the air pressure is restored. To stop the leakage oper-
ate the manual override to non-operated position. See
Fig. 1 and 2
NOTE:
Hand wheel operator is not correct device for safety lock
up of valve.
Locking device, code Q or W, is intended to be used for
safety lock up function during service operation. see IMO
6B70.
CAUTION:
Air pressure must always be released before operating
or servicing manual hand wheel operator!
Fig. 1 B1C_K_ actuator
Parts list for Fig. 1:
Part Quantity Name
33a 1 O-ring
44 1 Cylinder end
50a 1 Spindle
51a 1 Spindle nut (use as a limit screw)
52a 1 Hand wheel
53a 1 Lock nut
54a 1 O-ring
55a 1 Spring pin
56a 1 Cylindrical roller

46 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

6 B 72 en 5
7 Maintenance
The manual override requires no regular maintenance.
Grease can be added to the gear through the hole of the
outermost fitting screw, if needed.
Other maintenance as described for the B1C actuator, see
the IMO 6BC71en and the section 4.
8 Valve close and open position
adjustment
In the B1C_RK actuator, the close position limit of valve is
adjusted with the handwheel (309), secured with screw
(319) and locked with the hex nut (320).
B1C_RK_: Counterclockwise rotation of the handwheel
opens the valve.
In the B1C_RL actuator, the open position limit of valve is
adjusted with the handwheel (321), secured with screw
(323) and locked with the hex nut (324).
B1C_RL: Clockwise rotation of the handwheel closes the
valve.
In the B1C_RR actuator, see function from the texts above.
CAUTION:
Air pressure must always be released before operating
or servicing manual hand wheel operator!
Fig. 4 B1C_RK
Parts list for Fig. 5:
Part Quantity Name
306 1 Manual overdrive
307 1 Cylinder end
308 1 Extension shaft
309 1 Handwheel
310 1 Support bracket
311 1 Hex screw
312 1 Bearing
313 1 Pin
314 1 Pin
319 1 Hex screw
320 1 Hex nut
Fig. 5 B1C_RL
NOTE:
Turn the handwheel back to the starting position, before
applying supply pressure to the actuator again.
Parts list for Fig. 6:
Part Quantity Name
1 1 Housing
305 1 Manual overdrive
310 1 Support bracket
316 1 Fitting plate (size 20 only)
317 1 Socket screw (size 20 only)
321 1 Handwheel
322 1 Pin
323 1 Hex screw
324 1 Hex nut

66 B 72 en
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