amri ksb NG 1 User manual

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 1of 28
C O NT ENT S
1) GENERAL FE A T URES
2) WORKING C O N DI T I O NS
3) OPERATION AND ROTATION DIR ECTI O N
4) SAFETY N O T I C E
5) INSTALLATION I NS T RUC T I O N
6) MAINTENANCE AND MATERIALS S PECIF I C A T I O N
7) ATEX 2014/34/EU
8) ACTUATORS SPECIAL V ER SIO NS
9) STO R A G E
10) TROUBLESHOOTING GUIDE
11) DISPOSAL
Part turn pneumatic actuator
ACTAIR NG2 to 160
DYNACTAIR NG1 to 80
INSTRUCTION
MANUAL
Ref
.: 8513.81/05
-
EN

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 2of 28
1) GENERAL FEATURES
KSB manufacture a wide range of part turn pneumatic actuators for valve remote control.
The actuators are available on Double Acting “ACTAIR NG” and Spring Return “DYNACTAIR NG” versions.
- The principle of the actuator application is to open and close the connected valve, without the manual
operation with lever or hand wheel, by means of an electric-pneumatic connection on remote control.
The maintenance should be done by KSB trained personnel only.
This instruction manual contains important information regarding the KSB pneumatic actuator operation,
installation, maintenance and storage.
Please read carefully before installation and keep it in a safe place for further reference.
2) WORKING CONDITIONS
a) Construction.
Standard actuators are suitable for indoor and outdoor installation.
The laser marking or a printed label on the actuator body gives the actuator technical characteristics: type, size,
operating pressure, output torque, operating temperature, flange connection, product code and production date.
(See drawing pag.4).
b) Motive energy
The operating media should be dry and filtered compressed air not necessarily lubricated or inert gases
compatible with internal actuator parts and lubricants.
The operating medium shall have a dew point equal to – 20 °C or, to be at least, 10 °C below the ambient
temperature (ISO 8573-1, Class 3).
The maximum particle size shall not exceed 40 μm (ISO 8573-1, Class 5).
In the case of lubrication, the amount of lubricant will not exceed 25 mg/m3(ISO 8573-1, Class 5).
c) Supply operating media pressure.
The maximum supply pressure is 8,4 bar (120 psi)
Nominal supply pressure is 5,6 bar (80 psi)
Working pressure range from 3 bar (43,5 psi ) up to 8,4 bar (120 psi).
d) Operating temperature.
Actuator standard working temperature range: –20°C (-4°F) to 80°C (176°F)
For High temperature range: -20°C (-4°F) to +150°C (302°F) please contact KSB
For low temperature range: -50°C (-58°F) to +60°C (140°F) please contact KSB.
For high humidity and low temperature application are recommended to use a supplementary protection
(e.g. screens, sheds or integral painting) please contact KSB.
e) Operating drive rotation.
The part turn actuator rotation angle is nominally 90°. KSB actuator provides a stroke of 95° rotations, from –4°
to 91°, with standard stroke adjustment of –10°.

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 3of 28
f) Cycle time.
The cycle time is dependent on different operating and installation factors such as the supply pressure, the flow
capacity, the connection pipe size, the solenoid valve performance, the valve torque and characteristics,
environmental temperature condition
Actuator opening , closing and o pen / cl o se cycle times (sec.).
A ctua to r
size
0° - 90 °
cycle ti m e
90° - 0°
cycle ti m e
A ctua to r
size
0° - 90 °
cycle ti m e
90° - 0°
cycle ti m e
S EC S EC S EC S EC
NG 2
0,08 0,08
NG 1
0,13 0,09
NG 5
0,1 0,09
NG 2
0,13 0,1
NG 10
0,12 0,13
NG 4
0,2 0,17
NG 15
0,2 0,21
NG 6
0,31 0,33
NG 20
0,28 0,25
NG 8
0,4 0,33
NG 30
0,38 0,36
NG 12
0,58 0,44
NG 40
0,46 0,4
NG 16
0,65 0,53
NG 60
0,6 4 0,59
NG 25
0,96 0,72
NG 80
0,81 0,73
NG 35
1,16 0,9
NG 120
1,36 1,21
NG 50
1,65 1,49
NG 160
1,59 1,44
NG 80
2,6 2,1 4
The above time tableis referred to a standard actuator working cycle at the following tests conditions :
Ambient temperature: 18°C – 25° C
Motive energy operating medium: compressed air at 5,6bar
Nominal cycle: 90° in both directions - Load: free
ACTAIR NG actuators operate with solenoid valve 5/2 ISO 1-2. While the DYNACTAIR NG actuators with solenoid valve
3/ 2. Time tested with E l ectron i c Timer device.
NOTE : different working condition such as air pressure, piping connection, filters or solenoid valves, could change the
timing of the operations.
g) Lubrication.
Theactuators are factory lubricated for the standard working condition life.
During maintenance and reassembling KSB recommends to use:
TECNOLUBE SYNTHY POLYMER 402 , or equivalents.
h) Internal wear protection
The cylinder is lapped to obtaina surface with fine roughness and is protected with 20 µm technical oxidation. The
pistons slide supports are in P.T.F.E. or polyurethane only, no rubber in contact. The use of steel bearings onthe
Scotch-Yoke system ensures no play and lowfriction duringoperation.
i) External protection
KSB standard actuators are suitable for indoor and outdoorinstallation. The aluminium body is external protected for
corrosion and wear with 20 µm technical oxidation. The cast aluminium end caps are polyester painted. Driving shaft
and caps screws are in stainless steel.

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 4of 28
For aggressive atmosphere and severe environmental condition select the required protection from the external
finishes please contact KSB.
l) Marking and classification
AllKSB actuators bodies are marked with the Manufacturer name and address, the actuator Type code including the
Series and Size, and its range of Pressure and Temperatures working conditions and li mits .
Laser printings on actuators:
❶- KSB logo
❷- KSB actuator name and size + ISO flange dimension + Outside drive dimension
❸- NC or NO function (for Single acting actuator)
❹- Nominal air pressure: 5.6 bar or 4.2 bar (for Single acting actuator)
❺- Allowed temperature (Ex: -20°C to + 80°C) and max air pressure 8.4 bar
❻- Class of compliance with the rules and level of protection
Name of technical File deposited with a Notified Body
❼- Production date (code marked by hand after the test)
❽- Special versions
Tech File: R355-010073

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 5of 28
3) OPERATION AND ROTATION DIRECTION
Double A cti n g .
Thepistons of standard ACTAIR NG actuators are mounted as shown below. This provides the highest torqueat the valve
start opening for valve clockwise to close. The pistons are thenin their outermost position and the end travel stops can
befineadjusted.
2 4
The port 2is in connection with the cylinder side chambers, supplying the pressurized airin port 2 the standard Double
Acting actuator drive shaft rotates counter clockwise to open , while the port 4 is in connection with the intermediate
chamber and when pressurized the drive shaft rotates clockwise to close.
Single Acting, Spring Return fail to Close.
Thepistons of standard DYNACTAIR NG actuators are mounted as shown below. Although spring force is diminished, the
geometry of the mechanism provides a greater torqueat the end of the spring stroke. When the actuator is in the valve
open position, and the springs are fully compressed, the end of travel stops can be fineadjusted.
Caution. In order to avoid suction of dust or dirt inside of the actuator chambers during the spring action, install a
regulator-filter onthe por t 2.
2 4
The port 4 is in connection with the intermediate chamber and when pressurized the drive shaft rotate counter clockwise
to open.

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 6of 28
Double Acting operation cycle ( ACTAIR NG Type ).
Simple Acting Spring Return fail to close operation cycle ( DYNACTAIR NG Type )
Actuator operation functionality remote control should be done by means of direct solenoid valve connection to the
actuator standard interface V D E / V D I 3845 NAMUR, orby means of pipes screwed onthe ports marked with the
numbers 2 and 4 and connected to a separate controlcabinet.

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 7of 28
F i g 3.1 – Typical air connection schema .
A) R o tat i o n direction.
In accordance with the international standard ISO 5599-2 the actuator air ports connection position, location,
orientation and form shall be clearly identified and marked with the numerate 2 and 4.
Standard Double Acting and Simple Acting Spring Return actuators shall be Clockwise ( CW ) direction to valve Close,
and C oun ter
C l o ckw i se ( CCW ) direction to valve Open.
4) SAFETY NOTICE
- Theactuator should be used within the pressure mentioned limits only, operating the actuator over the pressure limit
w ill damage the internal actuator parts.
- Operating the actuator over or under the temperature limits will damage the internal and external parts.
- Operating the actuator in corrosive environments without the required external protection will damage theactuator.
- Before installation, service or maintenanceverify that the actuator is not pressurized, disconnect the air lines and
make sure that the air ports are vented
- Do not remove the end caps whilethe actuator is installed in the line,or whilethe actuator is under pressure.
- Do not disassemble the caps end spring cartridge, this operation should be done by KSBtrained personnel only, th i s
operation could causes personal injury.
- Before mounting the actuator onto the valve make sure that the valve rotation is according with the actuator
operating rotation, and the upper shaft slot orientation is also correct.
- Before installingthe actuated valve do cycling test for awhileto ensure the correct mechanical mounting and
actua to r/ val ve operations.
- Theactuator installation shall be done according to and in observance with the local and national laws regulation.
- KSB cannot be responsible for any damage to people, animals or things due to an improper use of the product.

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 8of 28
5) INSTALLATION INSTRUCTIONS
Theprinciple of the actuator application is to open and close the connected part turn valve installed in aplant,without the
manual operation, by remote control by means of an electric-pneumatic connection.
The normal sizing of actuators requires a 20%-30% safety margin over the valve breakaway torque to handle valves.
Plant design, chemical and physical flow characteristics and environmental condition could increase the safety factor to
apply to actuator sizing. Before performing any installation operation, verify the actuator and valve conditions according to
the safety notice above described.
Moreover, the utmost clearness is required during valve installation of the air supply connection to the actuator. All the
connection parts such as reductions, joints, plates, brackets and equipment must be clean and dirty free.
-Before assembling the actuator ontothe valve make sure that both items are correctly oriented, depending upon which
direction of rotation isrequired.
- Before startingthe actuator installation, should be done a visual actuator control to verify its physical condition after
transportation and storage.
- C on tro l troughthe shaft slot or caps the actuator position
- Read carefully the KSBinstruction sheet included in the cardboard box
- Read the actuator limits and performances marked onthe actuator body to verify its sui tabi li ty
- Remove the protection label stickers from the ports
F i g 5.1 - Actuator control
- Before fitting the actuator onthe valve, clean the valve and the actuator from the dust and d i rt.
- Verify the valve position, close or open, and therotation direction.
- Verify the actuator position and rotation according with the valve requirement and operation, especially for Spring R etur n
installation F ai l to Close or F ai l to Open.
- Spring Return F a il to Close actuators are always supplied in the close position.
- While Spring Return F ai l to Open are always supplied in the open position.
Position Indicator
(Optional
)
ISO 5211
Valve actuator
attachment
NAMUR
VDI/VDE 3845
Pressure connection
VDI/VDE 3845
Automation / Accessories
attachment

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 9of 28
Fig 5.2 – Valve/Actuator assembly: (A) direct-mount (B) plate-mount (C) bracket-mount.
NOTA : Representation in arrangement M
A) -Direct mounting.
Valve actuator Direct mounting isthe best solutionto avoid plays between valve stem and actuator drive shaft. For adirect
moun tin g you should have the same standard flange connection on valve and actuator as well as the valve stem dimensions
that fi t perfectly with the actuator drive. Before installation please verify that the actuator and valve flange ISO connections
are the same size; verify that the valve stem size and shape is suitable for direct mounting, if necessary use a drive
reduction.
F i t the valve stem into the actuator drive shaft connection, and bolt together the two ISO flanges.
B) -Mounting plate co nn e cti o n .
In case direct mounting is not possible cause of little differences in actuato r/ val ve flanges or drives sizes,mounting plate’s
adapters with suitable flanges dimensions allows an easyconnection living a sufficient space for the val ve / actua to r drive
adapter.
C) -Bracket & Joint c o nn e cti o n .
Wherever for technical reason the plant installation requires a distance between actuator and valve, orthe valve flange
and/or stem are not standard, and in any case, where the valve/actuator connection could not be possible, a bracket and
joint isthe ri g h t answer. The Bracket isa steel bridge that allows to connect the valve with is own flange connection in one
side and with the suitable actuator connection onto the opposite side, living a space in between for a steel joint connection.
The joint allowsadrive connection between the actuator and the valve stem indispensable in case of stem key drive and
flat head.
Chose the suitable flange bracket and the required joint connections to fix the actuator ontothe valve very tight without
any plays.
KSB actuator with its draining channels system on the flange connection pattern is especially designed for valve direct mounting.
This system allows to drop away any possible flow coming from the valve stem that with val ve /a ctua tor direct mounting could
damage the actuator.
Screw torque wrench setting
SI Z E
TORQUE Nm
Steel
(Cl 8-8) Stainless steel (A4 - 70)
M5 3 to 4 3 to 4
M6 4 to 5 4 to 5
M8 10 to 15 10 to 15
M10 20 to 25 20 to 25
M12 35 to 40 35 to 40
M14 60 to 65 60 to 65
M16 90 to 95 90 to 95
M20 180 to 185 180 to 185
M30 630 to 640 630 to 640
M36 1100 to 1150 1100 to 1150
A B C

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 10 of 28
F i g 5.3 A ctuat o r/ V al ve rotation control and mounting.
Type : ACTAIR NG
Closing position valve Opening position valve
Type :DYN ACTAIR NG ( Failtoclose)
Closing position valve Opening position valve
Mounting on the valve
The actuator can be positioned in 4 positions at 90° intervals.
The standard arrangement is the N position 1.
Arrangement NArrangement M
WARNING: For the actuators with flat ends (ACTAIR NG2 to NG30 and DYNACTAIR NG1 to NG12),
there are two versions:
- a reference for the N position,
- a reference for the M position
It is therefore impossible to switch from N to M and vice versa without changing the actuator.
←
Position 1
→
←
Position 2
→
A = Direct pneumatic interface
B = Marking
= Flow direction / Valve represent in closed position

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 11 of 28
F i g 5.4 Stroke adjustment .
Both actuator versions, Double Acting and Spring Return, are provided as standard with 10° stroke adjustment.
A) ACTAIR NG (Double Acting) - Close
adjustment instruction
NOTA: Representation in arrangement M
Thestroke adjustment onthe actuator mounted onthe valve should be done with the valve free of any flow pressure or
friction impediments, in additionthe actuator shall be disconnectedfrom theair supply and equipment.
Thisoperation should be done with the valve/actuator heldfirmly in the pipeline or in a vice.
- Supply the air pressure to port 2 to open the valve, and to positionthe actuator pistons inward.
- Remove the cap nuts(part N° 18) and its O-ring (part N° 24).
- Screw in clockwise direction the screwadjustment (part N° 28) in one actuator side only.
- Supply the air pressure to port 4 to close the valve and to positionthe pistons outward and against the adjustment screw,
and check the valve close position.
-In case the valve position is not correct, repeat the operation from the beginning.
-In opposite situation, if, with the air supply in the port 4, the valve is not sufficiently closed, unscrew counter clockwise the
adjustment screw (part N° 28) backward counter clockwise until the required position has been found.
- Obtained the correct valve position, and with the air pressure to the port 4, screw the other adjustment screw up to piston
pressing, in this way both adjustment screws are working to stop the pistons simultaneously.
- Tightly screw the cap nuts(part N° 18) with its sealing O-ring (part N° 24) onthe end caps to hold the adjustment screws
in desired position.
- Theactuator is now ready to operate correctly.
KSBstandard stroke adjustment is max 10° , special longer screws are available onrequest.
28
24
18
Port 4
Port 2
Valve
-4°
6°
95°

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 12 of 28
DYNACTAIR NG ( Single Acting) Spring return Fail to Close - Adjustment
instruction
OPEN adjustment
NOTA: Representation in arrangement M
Open Adjustment:
Thestroke adjustment onthe actuator mounted onthe valve should be done with the valve free of any flow pressure or
friction impediments, in addiction the actuator shall be disconnected from air supply and equipment.
Thisoperation should be done with the valve/actuator heldfirmly in the pipeline or in a vice.
- Remove the cap nuts(part N° 18) and its O-ring (part N° 24).
- Screw,clockwise direction, the screwadjustment (part N° 21) in one actuator side only.
- Supply air pressure to port 4, and due to theair pressureaction the pistons move to the outward position up to the li mits
determined bythe adjustment screw on the pistonhead.
- Check the valve open position, if the valve istoo much open repeat the operation from thebeginning.
- In opposite case,valve not sufficiently open, with the air supply to the port 4, move the adjustment screw (part N° 21)
backward counter clockwise until the required position has been fo und.
- Obtained the correct valve position, and with theair pressure to theport 4, screw the other adjustment screw up to piston
pressing, in this way both adjustment screws are working to stop the pistons simultaneously.
- With pressurized air supply, tightly screw the cap nuts(part N° 18) with its sealing O-ring (part N° 24) onthe end caps to
hold the adjustment screws in desired position.
- Inthis condition the actuator is ready to operate correctly.
KSBstandard stroke adjustment is max 10° , special longer screws are available onrequest.
21
24
18
22
Port 2
Port 4
Valve
-4°
95°

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 13 of 28
CLOSE adjustment
NOTA: Representation in arrangement M
Close adjustment:
Thestroke adjustment onthe actuator mounted onthe valve should be done with the valve free of any flow pressure or
friction impediments, in addiction the actuator must be disconnected from air supply and equipment.
Thisoperation should be done with the val ve / actua to r well heldin the pipeline or in a vice.
- Remove the cap nuts(part N° 18) and its O-ring (part N° 24).
- Supply the air pressure to port 4 to open the valve, and positionthe actuator pistons outward.
- Unscrew,counter clockwise direction, both screws in same measure (part N° 21).
- Stop to supply air pressure to port 4, and due to the spring action the pistons move to the inward position up to the li mits
determinate to the adjustment screws onthe spring caps (part N° 22).
***Attention
- Check the valve close position, if is over closed repeat the operation from the beginning until the desired valve closure
position is achieved.
- In opposite case, with the valve to much open, with the air supply to the port 4, move both adjustment screws inward,
clockwise in same measure.
- Without pressurized air supply, tighten the cap nuts(part N° 18) with its sealing O-ring (part N° 24) onthe end caps to
hold the adjustment screws in desired position.
- Inthis condition the actuator is ready to operate correctly.
21
24
18
22
Port 2
Port 4
Valve
-4°
6°
95°

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 14 of 28
6) MAINTENANCE AND MATERIALS SPECIFICATION
Life time 20 years or number of cycles as per E N15 714 - 3 2009 ( see table below ).
Nominal torque a Nm Piston or vane actuator
Minimum number of cycles b Maximum stroking time
for
testing, based on 0-90° s
≤
125
500
000
c
3
≤
1
000
500
000
5
≤
2
000
250
000
8
≤
8
000
100
000
15
≤
32
000
25
000
20
≤
63
000
10
000
30
≤
125
000
5
000
45
≤
250
000
2
500
60
a) Based on EN ISO 5211.
b) One cycle consists of nominal 90° angular travel in both directions (i.e. 90° to open + 90° to close). For
angular travel other than 90°, the endurance shall be agreed between the purchaser and the
manufacturer/supplier.
c) For thermoplastic actuators the minimum number of cycles shall be 250 000.
Should it be necessary to replace its pistons sealing, this operation must be done by trained people with proper to o l s, w e
recommend to returnthe actuator to KSB where the actuator will be overhauled and then tested for a correct replacement.
On request KSB will be willing to provide its sealing K i ts.
!!! KSB declines any responsibility for the products repaired by third parties

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 15 of 28
F i g 6.1 Actuator components and material list .
P OS . D E NO MI NAT I O N Q. M A TE RIALS S TA NDA RD S
1 Cylinder 1
A
luminium alloy ENAW 6063 Anodized
2 P i s t on 2
A
luminium alloy EN AB 46100
3 Cap 2
A
luminium alloy ENAB46100 P a i n t e d
4 Shaft 1 Stainless steel
A
ISI 303 - DIN 1.4305
5 Scotch yoke 1 Steel alloy UNI 90MnVCr8Ku - DIN 1.2842 Hardened
6 Support bush 1
Ac
etalic resin
7 Shaft support 1
Ac
etalic resin
8 Bush 2 Steel alloy UNI 110w4Ku - DIN 1.2516
9 Rotative sleeve 2 Steel alloy UNI 6364A - DIN 6325
10* Dynamic seal (piston) 2 P ol y u r et ha n e
11* P i s t on ’ s s upp or t 4 P.T.F.E. C ar b o - Gra p hi t e filled
12* Piston O-ring 2 Nitrilic rubber / FKM / FVMQ
13* O-ring (upper sealing shaft ) 1
Vi
ton
14 External supportring 1
A
luminium alloy
15 Washer 1 Stainless steel UNI 3653 - DIN 471
16 Seeger 1 Stainless steel UNI 3653 - DIN 471
17* O-ring (low sealing shaft ) 1
Vi
ton
18 Nut 1
A
luminium alloy ENAB46100 P a i n t e d
19* Cap O-ring 2 Nitrilic rubber / FKM / FVMQ
20 Screw 8 Stainless steel AISI 304- DIN 1.4301
21 Spring loading screw 2 Steel UNI 3740/65 8G G a l v a n i z ed
22 Spring cap 2 Steel DIN 1.0315 G a l van i z e d
DYNACTAIR NG type
ACTAIR NG type
DYNACTAIR NG type ACTAIR NG type

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 16 of 28
23 Spring 2 Steel DIN 1.7102
24 * O-ring 2 Nitrilic rubber / FKM / FVMQ
25 External elastic pin of the yoke 1 Steel DIN 1481
26 Internal elastic pin of the yoke 1 Steel DIN 1481
27 Centering ring 1
A
luminium alloy DIN AIMgSiPb Anodized
28 Stroke adjustment screw 2 Stainless steel AISI 304- DIN 1.4301
* Parts included in the spare parts kit.
F i g 6.2 Spare parts kit code identification for actuator size.
A) Spare parts kit for standard version: -20°C to +80°C (NBR)
Code article KSB Designation Actuator
01 731 255 A59A-NG2/D32A-NG1 ACTAIR NG 2
DYNACTAIR NG 1
01 731 256 A59A- NG5/D32A- NG2 ACTAIR NG 5
DYNACTAIR NG 2
01 731 267 A59A- NG10/D32A- NG4 ACTAIR NG 10
DYNACTAIR NG 4
01 731 270 A59A- NG15/D32A- NG6 ACTAIR NG 15
DYNACTAIR NG 6
01 731 271 A59A-B NG20/D32A- NG8 ACTAIR NG 20
DYNACTAIR NG 8
01 731 272 A59A- NG30/D32A- NG12 ACTAIR NG 30
DYNACTAIR NG 12
01 731 273 A59A- NG40/D32A- NG16 ACTAIR NG 40
DYNACTAIR NG 16
01 731 274 A59A- NG60/D32A- NG25 ACTAIR NG 60
DYNACTAIR NG 25
01 731 275 A59A- NG80/D32A-NG35 ACTAIR NG 80
DYNACTAIR NG 35
01 731 276 A59A- NG120/D32A-NG50 ACTAIR NG 120
DYNACTAIR NG 50
01 731 278 A59A- NG160/D32A- NG80 ACTAIR NG 160
DYNACTAIR NG 80
B) Spare parts kit for High temperature: -20°C to +150°C (FKM), Please contact KSB
C) Spare parts kit for Low temperature: -50°C to +60°C (FVMQ), Please contact KSB

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 17 of 28
F i g 6.3 Disassembly.
Actuator disassembly operation must have done with the actuator free from any pneumatic and electric connection and
dismounted from thevalve.
Verify that the actuator isair bag free, and the spring return actuator is completely in its springs rest position. Check that the
airport 2 and 4 are absolutely vented.
Use proper tools only.
A) Loosen the end cap screws (part N° 20) in cross sequence to remove the end caps (part n° 3), in case of force onthe
screws that means that the actuator isstill under airor spring action and the operation should be discontinued until the
action is removed. The end caps contain a sealing O-ring (part N° 19) onits seat that should be checked before replacement.
ACTAIR NG DYNACTAIR NG
Caution . The Spring Return end caps cartridges (Parts N° 3 + 18+24+19+23+22+21) are a safety device, where the preloaded
spring is setto avoid the dangerous spring jumping. Do not release the screw (part N° 21) to remove the spring from its seat,
this operation must be done byKSB technician only.
B) Hold the actuator in the vice and rotatethe drive shaft until the pistons (part N°2 ) are released form the scotch-yoke
groves (part N° 5),thenslip off the pistons from the cylinder (part N° 1). Do not use compressed air to remove the pistons
from the body, this operation could cause personal injuries.
ACTAIR NG DYNACTAIR NG
19
19
20
20
3
3
5
5
2
2
1
1

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INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
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C) The dynamic seal (part N° 10), O-ring (part N° 12)
and supports (part N° 11) should be checked before
replacement. Do not use sharp toolsto cut the
dynamic seal and O-ring or remove the supports from
thepiston as this may cause furrows ormarks.
D) When the components are disassembled, they should be properly cleaned and wear checked prior to being greased and
reassembled. In case the sealing parts are too much worn out use new parts from the spare parts kit.
Attention. Due to KSB scotch-yoke shaft blow-out security system the shaft disassembly operation must be carried out by
KSB technician only.
F i g 6.3 Assembly.
A) O-ring (part N° 12) and dynamic seal (part N° 10)
shall be greased and mounted onto the piston seat
using a proper conical tool ( see the drawing) that
allows an easy and perfect slip-in of the items without
any damages.
12
11
10
10
12
Conical
tool A
See page 21
11

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 19 of 28
B) Push into its piston seats the P.T.F.E. supports (part N° 11).
C) Grease the pistons (part N° 2) onthe replaced parts ( parts N° 10+11+12 ), and the piston bearings (part N° 8).
D) Grease the internal cylinder surface (part N° 1).
E) Position the scotch-yoke shaft (part N° 5) in order to have the groves in positionfor the pistons insertion and the right shaft
required direction of rotation.
F) Insert the pistons (part N°2 ), using a proper conical tool ( see the drawing ), in the scotch-yoke grooves (part N° 5) and press
simultaneously thetwo pistons inside of the cylinder (part N° 1). The KSB scotch-yoke system will avoid pistons
misalignment. Holding the actuator ona vice rotatethe shaft to verify the shaft rotation direction and the easy movement.
G) Replace the sealing O-ring (part N° 19) on its caps seat (part N° 3) and grease it. F i t the end caps to the body screwing the
screws in cross (part N° 20).
N.B. For the screw torque wrench setting see page9.
ACTAIR NG
NOTA: Representation in arrangement M
Inlet
port
Conical
tool
B
See page 22
2
5
3

ACTAIR - NG2 to NG160
INSTRUCTION MANUAL
DYNACTAIR – NG1 to NG80
Page 20 of 28
DYNACTAIR NG
NOTA: Representation in arrangement M
Inlet
port
Conical
tool
B
See page 22
2
5
3