PBM PAVBL Series, PAVBL253S, PAVBL453S, PAVBL453D Operation And Maintenance Instructions

PAVBL Actuator Sizes 0052 thru 0270

For your safety and protection it is important that the following precautions be taken prior to
working on the actuator.

1. Remove from the actuator all dust that may cause sparks; clean periodically to prevent
dusting on the actuator. Do not hit the actuators with metallic objects, as they may give off
sparks.

2. The installation and the maintenance of pneumatic actuators must be assigned to trained
and qualified personnel.

3. The use of the actuators out of the allowed temperature and pressure ranges may cause
damage to the internal and external components.

4. Prior to any installation and maintenance of the actuator, close and disconnect any kind of
power or air supply.

5. Disassembling the spring return type actuators (springs inside) may cause severe injuries.
The maintenance must be assigned to qualified expert personnel in full observance of the
instruction described at paragraph 5, otherwise, the actuator has to be returned to PBM.

Operation and Maintenance Instructions

TABLE OF CONTENTS:

1. SERVICE CONDITIONS

2. FUNCTION

3. STORAGE

4. MAINTENANCE

5. EXPLODED VIEW

6. DISASSEMBLING

7. ASSEMBLING

8. ADJUSTMENT

9. INSTRUCTIONS FOR CHANGING FAIL CLOCKWISE OR FAIL COUNTERCLOCKWISE OPERATION

10. TORQUE RATINGS, WEIGHTS AND OPERATION VOLUMES

1 Service conditions

• AIR SUPPLY: dehumidified or lubricated air (standard). Other non-corrosive gases or fluids are a possible
alternative option, if compatible to the materials of the actuator components (internal parts and lubricant). The maximum
particle size must not exceed 40µm (ISO 8573 Part 1, Class 5). In order to prevent water condensation and/or solidification
(ice, when actuator work below 0°C), the operating medium must have a dew point equal to 20°C or, at least 10°C below the
ambient temperature (ISO 8573 Part 1, Class 3).

 WORKING PRESSURE: minimum 29 PSI (2.5 BAR) – maximum 116 PSI (8 BAR)
 TEMPERATURE:

o minimum -20˚C to maximum + 85˚C - standard execution – NBR gaskets
o minimum -20˚C to maximum + 150˚C - HIGH temperature execution – FKM (Viton) gaskets

 ROTATION: half turn, 0˚ – 90˚ adjustable ±5˚ in both end positions (double adjustment).
 LUBRICATION: The actuators are equipped with filled-for-life lubrication for normal service conditions.
 OPERATING TIME: Please refer to the technical documentation. The operating time depends on various

o minimum -40˚C to maximum + 85˚C - LOW temperature execution – silicone gaskets
o Warning: in case of high or low temperature executions, a special grease is used as lubricant and such

conditions may alter the torque generated by the actuator. For further information please refer to PBM.

parameters such as air supply pressure, capacity of the air supply installation (size of piping, control equipment),
type of valve and fluid, selected safety factor, temperature, etc.).

Page 1 of 8

2 Function

The air pressure acts on the surface of the pistons (12) causing their alternate movement, which is converted into rotation
(standard 90°) of the pinion (2) as a result, the pneumatic actuators can be used for remote operation of valves.

2.1 Double Acting

Page 2 of 8

5 Exploded View

POS.

Description

Material

DA

SR

1

Body

Extruded Aluminum

1

1

2

Anti-blowout pinion

Steel

1 1 *3

O-ring

NBR 1 1

*4

Spacer Ring

POM

1 1 *5

O-ring

NBR 1 1 6 Spacer

POM

1 1 7

Cam

Stainless Steel

1

1

8

Position Indicator

Nylon

2 2 9

Washer

Stainless Steel

1

1

**10

Snap Ring

Steel

1 1 11

Piston

Die Cast Aluminum

2 2 *12

O-ring

NBR 2 2

*13

Anti-friction Ring

PTFE 15% Graphite

2 2 *14

Thrust Block

POM

2

2

15

Stop Bolt Retaining Nut

Stainless Steel

2 2 16

Stop Bolt

Stainless Steel

2 2 17

External Spring

Steel

0

See

Table

***

Central Spring

Steel

0

18

Internal Spring

Steel

0

19

Left End Cap

Die Cast Aluminum

1

1

20

Right End Cap

Die Cast Aluminum

1 1 21

End Cap Seats

NBR 2 2

22

End Cap Fixing Screw

Stainless Steel

8 8 %23

Spring

Steel

0

Below

%24

Anti-friction Ring

PTFE 15% Graphite

1 1 %25

Washer

Stainless Steel

1

1

Valid from Mod. 0052 to 0140

Spring Setting

SET

External

Spring

Internal

Spring

01

1 1

02 2

03 1 2

04 2 1

05 2 2

Valid from Mod. 0160 to 0200

Spring Setting

SET

External

Spring

Central

Spring

Internal

Spring

01

2

02

2

03 1 2 04 2 2 05 2 2

06 2 2

2

* Part subject to wear
** Reinforced series DIN471 – UNI 7436
*** Mod. 160-200
% Mod. 270 Only
Springs for Mod. 270 Number of springs each side for spring return
60 PSI is 4/5 (Spring Set 05) 80 PSI is 6/6 (Spring Set 8)

Page 3 of 8

6 Disassembling

6.1 Disassembling mod. 0052 to mod. 0270

CAUTION : It is recommended to use suitable safety equipment during the handling for maintenance because of heavy
and/or bulky parts.

1. Disconnect pneumatic and electric supplies from the actuator;

2. After having disconnected their power supply, remove carefully any accessory attached to the actuator, preventing any
damage during the handling;

3. Detach the actuator from the valve taking careful note of all references that may be helpful for the attachment after
maintenance.

4. Place the actuator on a support with a square of the same size of the pinion ( 2 ) so as to easily execute the below listed
operation (see Fig. 1):

5. Before disassembling the actuator check from the label on the body whether it is a double acting (DA) or spring return
(SR ) type;

6. For DOUBLE ACTING ACTUATOR: Unscrew in crossed sequence the screws ( 25 ) for fastening the end caps ( 21-22 )
see Fig. 2

7. For SPRING RETURN ACTUATOR: Unscrew GRADUALLY in crossed sequence the screws (25) for fastening the end
caps ( 21-22 ), Fig. 2; Note: the screws are long enough to hold the springs even if extended; Loosen nuts ( 16 ) and
unscrew completely screws ( 17 ) see Fig. 3 ;

8. Rotate the cylinder ( 1 ) in CLOCKWISE direction (top view) holding the pinion ( 2 ) so as to release the rack of the
pistons ( 12 ) from the pinion ( 2 ) and to push the pistons towards to the cylinder ends. Now both pistons ( 12 ) can be
removed see Fig. 4.
NOTE: Do not use compressed air to remove the pistons ( 12 ) from the cylinder ( 1 )

9. Remove the snap ring ( 11 ) from the pinion ( 2 ), the washer ( 10 ), the spacer ( 9 ) and the O-ring ( 6 ) see Fig. 5 ;

10. Extract the pinion ( 2 ) from the cylinder ( 1 ) by pushing it down, with special caution for all seating’s, see Fig. 5
(if necessary use a rubber hammer);

11. Tilt the cylinder (1) and let the cam (7) slide out, see Fig. 5.

Page 4 of 8

7 Assembling

7.1 Assembling mod. 0052 to mod. 0270

CAUTION: It is recommended to use suitable safety equipment during the handling for maintenance because of heavy
and/or bulky parts.

1. Before assembling clean all components preferably with degreaser.

2. Place the pinion ( 2 ) on a support with a square of the same size of the female attachment. Make sure that the pinion is
provided with lower O-ring ( 3 ), spacer ( 4 ) and upper O-ring ( 5 ). Lubricate the O-rings (see arrows fig. 13). The
recommended lubricating grease is “KLUBER” TRIBO STAR 1EP“

3. Screw down one adjustment screw ( 17 ) with nut ( 16 ) in the right adjustment hole of the cylinder ( 1 ) and let the cam (7)
with ring ( 8 ) slide down on the guiding rail on the cylinder ( 1 ) (see detail. A Fig.14) until it stops against the screw;

4. Lay the cylinder ( 1 ) down on the pinion ( 2 ) holding it with the NAMUR surface rotated by approx. 50° to the upper slot
of the pinion, see fig. 15 ;

5. Fit on the pinion ( 2 ) the O-ring ( 6 ), the spacer ( 9 ), the washer ( 10 ), the snap ring ( 11 ), see Fig. 16 ;

6. Grease the internal chamber of the cylinder ( 1 ) and both pistons ( 12 ) provided with O-ring ( 13 ) antifriction ring ( 14 )
and thrust block ( 15 ) The recommended lubricating grease is “KLUBER” TRIBO STAR 1EP“.

7. For the standard execution (clockwise rotation opens) press the pistons ( 12 ) into the cylinder ( 1 ) while turning the
cylinder ( 1 ) in counterclockwise direction ( top view) until the pistons come into contact, see fig. 17 ;

8. Screw down the second adjustment screw ( 17 ) with nut ( 16 ) in the cylinder (1) and adjust the travel stop, paragraph 8;

9. For DOUBLE ACTING ACTUATOR: Mount the end cap ( 21-22 ) with O-ring ( 24 ) and gasket ( 23 ) on the cylinder and
screw down in crossed sequence the screws ( 25 ), see fig. 18. Repeat the operation on the opposite side.
For SPRING RETURN ACTUATOR: Introduce the spring set ( 18-19-20 ) into the cylinder ( 1 ) and center them on the piston
( 12 ), then mount the caps ( 21-22 ) with O-ring ( 24 ) and gaskets ( 23 ) centered on the springs ( 18-19-20 ). Note: the
pistons have to be in CLOSED position. Screw partially down the screws ( 25 ) in crossed sequence compressing the springs
uniformly until the cap is completely closed, see fig. 18. Repeat the operation on the opposite side;

10. Execute some test cycles to check the correct functioning of the actuator before installing it.

Page 5 of 8

8 Adjustment

By means of the left screw the 90° end position ( open ) can be adjusted, see Fig. 27, of the right screw the 0°end position
(closed), see Fig. 28.

NOTE : During the adjustment the pinion must not be blocked on the support.

8.1 Adjustment procedure, actuator in counter clockwise position

• Put the actuator in clockwise position;

• Adjust by means of the left adjustment screw ( L );

• Put the actuator in counter clockwise position and check the adjustment

• Repeat until the desired adjustment is achieved;

• Hold the screw in the correct position and tighten the nut.

8.2 Adjustment procedure, actuator in clockwise position

• Put the actuator in counter clockwise position (supply compressed air for mod SR);

• Adjust by means of the right adjustment screw ( R );;

• Put the actuator in clockwise position and check the adjustment (interrupt the air supply for mod.SR);

• Repeat until the desired adjustment is achieved;

• Hold the screw in the correct position and tighten the nut.

Page 6 of 8

For your safety and protection it is important
that the following precautions be taken prior to
working on the actuator.

1. Remove from the actuator all dust that may

cause sparks; clean periodically to prevent
dust on the actuator.

2. The installation and the maintenance of

pneumatic actuators must be assigned to
trained and qualified personnel.

3. Prior to any installation and maintenance of

the actuator, close and disconnect any kind
of power or air supply.

4. Disassembling the spring return type

actuators (springs inside) may cause severe
injuries.

9. Instructions for Changing Fail Clockwise or Fail Counterclockwise
Operation of Pneumatic Actuators

1. Instruction

For normal Fail Close operation, the left side piston/rack
is positioned at the back of the housing when facing the air
nozzles and the right side piston/rack is positioned on the
near side of the housing. This will cause clockwise rotation
of the pinion when looking down on the actuator when the
springs cause the pinion to rotate and counter-clockwise
rotation of the actuator when air causes the pinion to
rotate. If it is desired to rotate the pinion counter-clockwise
when the springs cause the pinion to rotate, the locations
of the two pistons/racks should be reversed.

This is Normal Fail Close Operation – Note the location of the Piston Racks

Right Piston Rack is in Front – Just Behind Air Supply Parts

This is Normal Fail Close Operation – Note the location of the Piston Racks

Right Piston Rack is in Front – Just Behind Air Supply Parts

Page 7 of 8

10 Torque Ratings, Weights and Operation Volumes

Actuator Model

Spring Set

Spring Torque Output

(in-lbs.)

Air Pressure at Actuator (psig)

60

80

Torque Output from Pressure (in-lbs)

Start

End

Start

End

Start

End

PAVBL253S - -0052

3

66

38

80

47

N/A

N/A

PAVBL453S - -0052

5

88

60

N/A

N/A

101

55

PAVBL253S - -0063

3

128

71

149

79

N/A

N/A

PAVBL453S - -0063

5

196

111

N/A

N/A

193

95

PAVBL253S - -0075

3

234

125

275

137

N/A

N/A

PAVBL453S - -0075

5

358

193

N/A

N/A

354

157

PAVBL253S - -0085

3

307

183

387

211

N/A

N/A

PAVBL453S - -0085

5

456

273

N/A

N/A

503

257

PAVBL253S - -0100

3

495

279

628

329

N/A

N/A

PAVBL453S - -0100

5

733

417

N/A

N/A

802

378

PAVBL253S - -0115

3

786

442

1,044

541

N/A

N/A

PAVBL453S - -0115

5

1,176

657

N/A

N/A

1,352

637

PAVBL253S - -0125

3

969

611

1,351

640

N/A

N/A

PAVBL453S - -0125

5

1,412

900

N/A

N/A

1,762

789

PAVBL253S - -0140

3

1,617

853

1,910

856

N/A

N/A

PAVBL453S - -0140

5

2,251

1,200

N/A

N/A

2,481

1,017

PAVBL253S - -0160

4

2,443

1,522

2,447

1,350

N/A

N/A

PAVBL453S - -0160

5

2,860

1,917

N/A

N/A

3,452

2,240

PAVBL253S - -0200

4

4,040

2,686

4,788

3,080

N/A

N/A

PAVBL453S - -0200

6

5,900

4,009

N/A

N/A

5,893

3,539

PAVBL253S - -0270

5

10,788

6,915

11,495

6,884

N/A

N/A

PAVBL453S - -0270

8

14,387

9,230

N/A

N/A

15,360

9,220

Actuator Model

Rotate

CCW

Rotate

CW

PAVC
series

Actuator Model

Air pressure at actuator (psig)

Volume

(cu.in.)

Volume

(cu.in.)

Approx.

weight

(lbs.) 60 psig

80 psig

Constant Torque Output

PAVBL453D - - 0052

6.1

7.9

2.3

PAVBL453D - - 0052

133

179

PAVBL453S - - 0052

6.1

6.7

3.0

PAVBL453D - - 0063

238

321

PAVBL453D - - 0063

12

14

4.4

PAVBL453D - - 0075

435

586

PAVBL453S - - 0063

12

11.6

5.3

PAVBL453D - - 0085

629

851

PAVBL453D - - 0075

22

27

7.7

PAVBL453D - - 0100

991

1,336

PAVBL453S - - 0075

22

22

9.1

PAVBL453D - - 0115

1,640

2,210

PAVBL453D - - 0085

31

39

10.4

PAVBL453D - - 0125

2,157

2,906

PAVBL453S - - 0085

31

32

12.9

PAVBL453D - - 0140

3,013

4,018

PAVBL453D - - 0100

48

61

14.7

PAVBL453D - - 0160

4,394

5,859

PAVBL453S - - 0100

48

49

18.8

PAVBL453D - -0200

8,239

10,981

PAVBL453D - - 0115

79

104

23.7

PAVBL453D - - 0270

19,097

25,469

PAVBL453S - - 0115

79

84

30.7

PAVBL453D - - 0125

99

135

28.9

PAVBL453S - - 0125

99

109

37.7

PAVBL453D - - 0140

138

193

43.7

PAVBL453S - - 0140

138

146

57.6

PAVBL453D - - 0160

220

290

58.3

PAVBL453S - - 0160

220

215

79

PAVBL453D - - 0200

350

600

99.1

PAVBL453S - - 0200

348

463

147

PAVBL453D - - 0270

915

1,086

222

PAVBL453S - - 0270

915

946

269

SPRING RETURN ACTUATORS

WEIGHTS AND VOLUMES DOUBLE ACTING ACTUATORS

Page 8 of 8

PBM, Inc., 1070 Sandy Hill Road, Irwin, PA 15642

Phone: [phone] or (800) 967-4PBM

Fax: [phone]

E-mail: [e-mail] Web: www.pbmvalve.com

© Copyright 2018 PBM, Inc. IOM-ACTUATOR-B R0 10/18 Printed in USA