PBM PAVCL 270 Guía de solución de problemas

Page 1 of 8

PAVCL Actuator Size 270

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:

ominimum -20˚C to maximum + 85˚C - standard execution –NBR gaskets

ominimum -20˚C to maximum + 150˚C - HIGH temperature execution –FKM (Viton) gaskets

ominimum -40˚C to maximum + 85˚C - LOW temperature execution –silicone gaskets

oWarning: 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.

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

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.).

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.

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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

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5 Exploded View

* Part subject to wear

Number of springs for each side –

60 PSI Spring Return is 4/5 (Spring Set 05)

80 PSI Spring Return is 6/6 (Spring Set 08)

POS.

Description

Material

Body

Extruded Aluminum

Anti-blowout pinion

Steel

O-ring

NBR

O-ring

NBR

Anti-Friction Ring

PTFE 15% Graphite

Anti-Friction Ring

PTFE

Plate

GGG40

Washer

Stainless Steel

Stop Bolt Retaining Nut

Stainless Steel

Stop Screw

Steel

Fixing Screws

Stainless Steel

Piston

Die Cast Aluminum

Pre-Compressed Spring

Steel

*****

End Cap Fixing Screw

Stainless Steel

End Cap

Die Cast Aluminum

*16

Thrust Block

POM

*17

Spacer Ring

POM

Pinion Washer

Stainless Steel

Snap Ring

Steel

*20

O-ring

NBR

*21

Anti-Friction Ring

PTFE 15% Graphite

O-ring

NBR

O-ring

NBR

Anti-Blowout Key

POM

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6 Disassembling

6.1 Disassembling 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. 6):

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 ( 14 ) for fastening the end caps ( 15 )

see Fig. 7

7. For SPRING RETURN ACTUATOR: Unscrew GRADUALLY in crossed sequence the screws (14) for fastening the end

caps ( 15 ), Fig. 7; Note: the screws are long enough to hold the pre-compressed springs ( 13 ) even if extended; Loosen

nuts ( 9 ) and unscrew completely screws ( 10 ) see Fig. 8 ;

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. 9.

NOTE: Do not use compressed air to remove the pistons ( 12 ) from the cylinder ( 1 )

9. Lay the actuator on one base of its cylinder ( 1 ) and unscrew the screws ( 11 ) in crossed sequence to remove the plate

( 7 ) see Fig. 10 ;

10. Place the actuator on the support again.

11. Remove the snap ring (19 ) from the pinion ( 2 ), the washer ( 18 ), and the spacer ( 17 ), See Fig. 11.

12. Gradually raise the cylinder ( 1 ) making sure that the pinion ( 2 ) gets extracted with special caution for all seatings (if

necessary, use a rubber hammer), see Fig. 12..

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7 Assembling

7.1 Assembling 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 ( 5 ) and upper O-ring ( 4 ). Lubricate the O-rings (see arrows fig. 19). The

recommended lubricating grease is “KLUBER” TRIBO STAR 1EP“

3. Lay the cylinder ( 1 ) down on the pinion ( 2 ), see fig. 20.

4. Fit on the pinion ( 2 ) the spacer ( 17 ), the washer ( 18 ), the snap ring ( 19 ), see Fig. 21.

5. Remove the cylinder with pinion from the support and lay it on one base to mount the plate ( 7 ) with anti-friction ring ( 6 )

(holes for adjusting screws on the same side as the NAMUR attachments), then screw down the fastening screws (11 ) with

washer ( 8 ) in crossed sequence, see fig. 22, and place the cylinder on the support again.

6. Grease the internal chamber of the cylinder ( 1 ) and both pistons ( 12 ) provided with O-ring ( 20 ), antifriction ring ( 21 ),

anti-blowout key ( 24 ), and thrust block ( 16 ). The recommended lubricating grease is “KLUBER” TRIBO STAR 1EP“.

7. Rotate the Cylinder ( 1 ) by approx.. 50° to the upper slot of the pinion, see fig. 23.

8. 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. 23, 24 ;

8. Introduce the adjustment screws ( 10 ) with nuts ( 9 ) into the plate ( 7 ) and adjust the travel stop, see fig. 25 and

paragraph 8;

9. For DOUBLE ACTING ACTUATOR: Mount the end cap ( 15 ) with O-ring ( 22 ) and gasket ( 23 ) on the cylinder and

screw down in crossed sequence the screws ( 14 ), see fig. 26. Repeat the operation on the opposite side.

For SPRING RETURN ACTUATOR: Introduce the spring sets into the cylinder ( 1 ) and center them in the appropriate

pockets of the piston ( 12 ), then mount the end caps ( 15 ) with O-ring ( 22 ) and gaskets ( 23 ) Note: the pistons have to

be in CLOSED position. Screw partially down the screws ( 14 ) in crossed sequence compressing the springs uniformly

until the cap is completely closed, see fig. 26. Repeat the operation on the opposite side;

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

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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.

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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

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.

Page 8 of 8

10 Torque Ratings, Weights and Operation Volumes

SPRING RETURN ACTUATORS

Actuator Model

Spring Set

Spring Torque Output

(in-lbs)

Air Pressure at Actuator (psig)

Torque Output from Pressure (in-lbs)

Start

End

Start

End

Start

End

PAVCL253S - -0270

10,788

6,915

11,495

6,884

N/A

PAVCL453S - -0270

14,387

9,230

N/A

15,360

9,220

WEIGHTS AND VOLUMES DOUBLE ACTING ACTUATORS

Actuator Model

Rotate

CCW

Rotate

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

PAVCL453D - - 0270

915

1,086

222

PAVCL453D - - 0270

19,097

25,469

PAVCL453S - - 0270

915

946

269

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

Phone: (724) 863-0550 or (800) 967-4PBM

Fax: (724) 864-9255

E-mail: [email protected] Web: www.pbmvalve.com

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