Weir Hopkinsons Fig 9050 Manual

Hopkinsons Fig 9050
VALVE ACTUATO
Standard Operating & Maintenance Instructions
CU AWAY OF FIG. 9050 VALVE AC UA OR
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Index
Section 1
1.1 General Page 3
1.2 Motor and Gear Train Page 3
1.3 Torque Limiting Device Page 3
1.4 Manual Operation Page 3
1.5 Limit Switch Assembly Page 4
1.6 Limit Switch and ndicator Unit Assembly Page 5
1.7 Torque Switch Assembly Page 5
1.8 ndicator Unit (When Fitted) Page 5
Section 2
2.1 Limit Switch Page 6
2.2 Commissioning Pedestal Units Page 6
2.3 Commissioning Direct Mounted Actuators Page 6
2.4 Mechanical Valve Positioning ndicator (When Fitted) Page 7
2.5 Motor Page 7
2.6 Alternating Current Page 7
2.7 Lubrication Page 7
Drawings
Arrangement of Fig. 9050 Actuator Page 8
Sectional Arrangement of Fig. 9050 Actuator Page 9
Cut Away of Fig. 9050 Valve Actuator Page 10
Arrangement of Fig. 9050 Actuator Pedestal Mounted Page 11
Arrangement of Limit Switch for Fig. 9050 & 9151 Actuators Page 12
Torque Switch Assembly for Fig. 9050 & 9151 Actuators Page 13
Arrangement of Valve Position Transmitter for Fig. 9050 &
9151 Actuators Page 14
Contact Details Page 15

Hopkinsons Fig 9050
VALVE ACTUATO
Section 1
1.1 GENE AL
The actuator consists of a rotor stator unit driving an output shaft through a single stage worm
reduction, which incorporates an automatic mechanical device for changing the drive from
manual to power. The actuator includes a valve travel limit switch unit and a torque switch unit
and is of totally enclosed weather-proof construction, suitable for mounting at any angle or
inverted.
1.2 MOTO AND GEA T AIN
A.C. 3 phase motors are of squirrel cage rotor stator design. Performance is in accordance with
B.S. 170. Class 'B' insulation is provided as standard and the motors are 20 minute rated.
The windings are terminated on 2B.A. Phosphor Bronze stud type terminals in actuator terminal
box.
The stator is mounted in a housing forming an integral part of the actuator housing and the
rotor is mounted directly onto the wormshaft which is mounted on "packed for life" grease
lubricated needle roller bearings.
The output shaft bearings are located in the main housing and the output shaft assembly
incorporates a lost motion, or hammer blow device which allows the motor to run up to speed
before transmitting full torque to the valve.
1.3 TO QUE LIMITING DEVICE
The wormshaft of the actuator is capable of axial movement against a Belleville washer spring
pack.
The design of the spring pack is such that a limited deflection is permitted allowing axial
movement of the wormshaft in either direction corresponding to 40% to 120% output torque
of the actuator in the opening or closing direction.
1.4 MANUAL OPE ATION
The actuator is equipped with a handwheel to operate the valve in event of power failure. The
handwheel is easily engaged with the output shaft by moving the hand/auto lever from right to
left and at the same time slowly turning the handwheel
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An automatic device is incorporated which transfers the drive from manual to power
immediately the motor starts to rotate. As the sliding clutch is withdrawn completely from
manual before engaging power drive the operator is ensured complete safety should the
actuator be started during hand operation.
The sliding clutch is mounted on the splined output shaft and a compression spring ensures
that the dog teeth on the underside are fully in mesh with the dog teeth on the top side of the
wormwheel, thus transmitting the drive from the wormshaft to the wormwheel, from the
wormwheel to the sliding clutch via the dog teeth lost motion device and from the sliding
clutch to the output shaft. The hand/auto lever operates a lever and roller which makes contact
with the sliding clutch in order to lift it out of engagement with the wormwheel and into
engagement with the dog teeth on the handwheel.
The hand/auto lever is maintained in the hand position by 2 spring loaded catch levers.
To return to power operation the motor is energised and as the wormshaft rotates the
wormwheel, 2 pawls fitted into the wormwheel strike the 2 spring loaded catch levers which
release the hand/auto lever allowing it and the sliding clutch to return to the auto position.
1.5 LIMIT SWITCH ASSEMBLY
The standard limit switch assembly comprises 4 - 'open' position and 4 - 'close' position micro
switches, each bank of switches being simultaneously operated by a cam on the pinion shaft of
a hunting tooth gear train.
An intermediate position bank is fitted when required providing a maximum of 4 micro-
switches operated simultaneously by a cam on the pinion shaft of an additional hunting tooth
gear train.
The hunting tooth gear trains are so arranged that each bank is independently adjustable to
provide any limit switch setting from zero to 100, actuator turns, i. e. valve fully closed to fully
opened, with the 'intermediate' bank set at any position between the open and close limits, the
accuracy of the settings being O.1 actuator turns.
Each hunting tooth gear train consists of pinion shaft with a cam pinned to the non-driving
end, 3 pinions on the shaft within the bottom and middle limit switch plates and a drive pinion
in mesh with the compound gear train coupled to the limit switch drive spindle. The 3 pinions
within the plates are in mesh with 3 spur wheels each of which embodies a positive drive to a
hunting tooth gear mounted on the spurwheel boss. The faces of the hunting tooth gear and
spurwheel are formed to permit drive in any of 10 positions corresponding to the numerals on
the hunting tooth gear flange, the spur wheels being mounted on a hunting tooth spindle.
The spur wheel has a pentagonal spigot and the hunting tooth gear has a double pentagonal
recess. A spring on the hunting tooth spindle keeps the spur wheel and the hunting tooth gear
locked together in the normal driving or set position but permits them to be separated for initial
setting.
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1.6 LIMIT SWITCH AND INDICATO UNIT ASSEMBLY
The limit switch and indicator units are mounted on plates which embody an indicator take- off
spindle and a limit switch drive spindle.
The complete assembly is fitted to the end of the actuator, opposite to the the motor, the cross
pin of the limit switch take off spindle and a slot in the limit switch drive spindle forming the
coupling for the gear drive from the actuator output shaft.
1.7 TO QUE SWITCH ASSEMBLY
The actuator is fitted with a torque switch assembly which incorporates 'open' and 'close' torque
switches which are fitted with adjusting features easily set to limit the actuator torque in
increments of 20% within the indicated range. The torque switch assembly is spigot mounted
on the actuator housing and the open and close pinions are engaged with the drive sleeve
fitted on the end of the wormshaft. Torque indication in terms of axial displacement of the
wormshaft is transmitted via the pinions to the 'open' and 'close' torque switch operating
spindles. Withdrawal of operating spindle by means of knurled knob permits the adjusting
pointer to be set in any 5 positions from 0.4 to 1.2 (40% -120%) output torque. The operating
spindles are spring loaded and therefore are held in position after re-engaging with drive sleeve.
The switch is normally tripped with circuit closed and retained in this position by the switch
lever and torsion spring. The switch is re-set and the circuit opened at the set torque
figure by the action of the cam attached to the pinion spindle.
1.8 INDICATO UNIT (WHEN FITTED)
The indicator unit consists of two plates separated by pillars, input and output spindles, change
gears, spur gears, index plates, pointer and pointer spindle. An indicator unit supplied with an
actuator includes change gears of the correct ratio for the number of output turns of the
actuator andno adjustment is required other than setting the pointer to correspond to the
position of the valve.
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Section 2
2.1 LIMIT SWITCH
The limit switch assembly of an actuator fitted direct onto a valve is set forthe correct number
of turns before despatch and should not be disturbed.
Pedestal type actuators and actuators for fitting direct on to valves at site are despatched with
each switch bank set at 50. 0 turns so that any mal- operation of the handwheel before the
actuator is coupled or fitted to the valve should not disturb the correct relationship of cams to
rollers. After coupling or fitting the actuator to the valve remove the limit switch cover. Hand
operate the valve to the full shut position, and observe that the limit switch cams are in the
correct re- set position. Maximum cam throw to operate switches 72° clockwise for open or
intermediate, anti-clockwise for close. f for any reason the cam is in any other position, the
correct position is easily attained by separating the spur wheel and the hunting tooth wheel
which registers multiples of 10. Turn the hunting tooth wheel in a clockwise or anti-clockwise
direction until the correct cam position is obtained and re-engage with spurwheel. This should
be carried out without disturbing the remaining digits. After noting the actual number of turns
indicated on the 'close' bank hand operate the valve in the open direction 0.3 turns of the limit
switch counter mechanism to the nearest 0.1 turn which will give a complete number in a
straight line, in line with the pinion and hunting tooth spindles. Reset the 'close' bank to 000
turns (in line) and re-engage each spur wheel and hunting tooth gear. Now set the
'intermediate' and 'open' banks to the correct number of actuator output shaft turns from zero
at which these switches are required to trip.
2.2 COMMISSIONING PEDESTAL UNITS
First ascertain that the valve is in the full shut position i. e. the stop is resting on the lower
shoulder of the valve pillars. Connect the valve and unit mechanically by the extension spindle
supplied taking care not to move the valve from the full shut position and also ensure that the
universal forks on the intermediate shaft are in line and not at 90° to each other.
2.3 COMMISSIONING DI ECT MOUNTED ACTUATO S
Valves which are to be fitted with direct mounted actuators at site are fitted with a circular
adaptor plate secured to the valve by the pillar nuts.
f a standard hand operated valve is to be motorised by means of a direct mounted actuator,
remove the existing handwheel, gearing (when fitted) sleeve and bridge, leaving the valve
pillars and spindle only for application of the actuator. Remove the circular adaptor plate from
the base of the actuator and fit this item on the valve pillar ends and secure by means of the
existing pillar nuts. Do not remove any covers at this stage but engage manual operation in
preparation for fitting to the valve.
Sling the actuator by means of overhead tackle and carefully lining up the actuator with the
valve spindle axially and radially, lower the actuator on to the valve until the output shaft begins
to engage the valve spindle. Rotate the handwheelin the opening direction, and, at the same
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time, gradually lower the actuator until the base face within the spigot location is flush with the
top face of the adaptor flange. Fit the nuts to the mounting studs and secure.
2.4 MECHANICAL VALVE POSITION INDICATO (WHEN FITTED)
Set the pointer to the 'shut' index of the scale with the valve in the full shut position after
setting the limit switch.
2.5 MOTO
The adjustment for wear of brushes for D. C. motors is the only attention required.
2.6 ALTE NATING CU ENT
For A. C. 2 and 3 phase.
It is very important to ascertain that the direction of travel of the valve corresponds to the
'open' and the 'close' button of the controller.
Carefully check the direction of travel of the valve with the movement of the controller by
having the valve in mid-position. Then press the 'open' or close' operating button and
immediately after that stop the actuator and ascertain whether the valve has moved to
correspond to the button which was operated. f the valve has travelled in the opposite
direction, reverse any two of the supply leads in the contactor.
2.7 LUB ICATION
The actuator requires the minimum of lubrication as the bearings are packed for life. Actuators
for mounting direct on to a valve are fitted with a grease gun Dipple for valve stem lubrication.
When an actuator is fitted to a valve at site, the latter nipple should be fully charged when
commissioning, with the valve in the full open position, and not excessively lubricated during
service with the valve full shut. t is advisable to lubricate sparingly the limit switch and torque
switch unit gearing and moving parts.
ECOMMENDED LUB ICANTS:
SHELL ALVANlA GREASE No.3 - Grease gun nipple
SHELL V TREA O L No. 27 - Gears and moving parts of limit switch and value position indicator
unit.
ROCOL MOLYGEAR - nternal power gears pre- ubricated at works sufficient for normal life of
actuator. Dependent upon usage and operating conditions.
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ARRANGEMEN OF FIG. 9050 AC UA OR

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SEC IONAL ARRANGEMEN OF FIG. 9050 AC UA OR

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CU AWAY OF FIG. 9050 VALVE AC UA OR

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ARRANGEMEN OF FIG. 9050 AC UA OR
PEDES AL MOUN ED

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ARRANGEMEN OF LIMI SWI CH FOR FIG. 9050 & 9151 AC UA ORS

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ORQUE SWI CH ASSEMBLY FOR
FIG. 9050 & 9151 AC UA ORS

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ARRANGEMEN OF VALVE POSI ION RANSMI ER
FOR FIG. 9050 & 9151 AC UA ORS

HOP 9050 /Jan 2011
For spares or service enquiries please contact:
North America
Valve Customer Support Group
Weir Power and ndustrial
2360 Millrace Court
Mississauga, Ontario
L5N 1W2, Canada
Tel: [phone]
Servicecall: (877) 797 WE R (9347)
Fax: [phone]
E-mail: [email protected]
Web: www.weirpowerindustrial.com
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