Emerson Hytork XL26 Instruction manual

Installation, Operation & Maintenance Manual

MAC050515 EN Rev. D

February 2018

Hytork XL Pneumatic Actuator

Table of Contents

February 2018

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

Table of Contents

1 Important Safety Procedures ........... 1

2 ATEX instructions for use in (potential)

explosive areas ....................................2

2.1 Intended use...............................................2

2.2 Safety Instructions......................................2

2.3 Temperature range for (potential)

explosive areas............................................2

3 Operating Media, Pressures and

Temperatures .................................. 3

3.1 Operating media ........................................3

3.2 Operating Temperature range ...................3

4 Actuator to Valve Installation........... 3

4.1 Bi-directional Travel Stops ..........................3

4.2 Travel Stop Adjustments.............................3

5 Piping Instructions........................... 3

6 Solenoid Valves on

Spring Return Actuators ......................4

7 Position Feedback............................ 4

8 Spares Recommendations................ 4

9 Disassembly Procedure.................... 4

9.1 End cap and springs disassembly on

Spring Return actuators..............................4

9.2 Changing spring sets on XL26 to XL681 .....5

9.3 End cap disassembly on

Double Acting actuators ............................5

9.4 Piston disassembly .....................................5

9.5 Pinion disassembly .....................................5

9.6 Inspection...................................................5

10 Assembly Instructions...................... 6

10.1 Pinion Assembly .........................................6

10.2 Alignment of pinion for correct piston

assembly ................................................ 6

10.3 Piston Assembly .........................................6

10.3.1 Clockwise rotation ........................................6

10.3.2 Counter-Clockwise rotation ..........................6

10.4 Travel stop assembly...................................7

10.5 End cap assembly on double acting

actuators ....................................................7

10.6 Spring Return Actuators .............................7

10.6.1 Spring set adjustments..................................7

10.6.2 Installing the Springs.....................................8

11 Testing the Hytork Actuator............. 8

11.1 Testing and Cycling of Infrequently

Used or Stored Actuators ...........................8

12 Retractor Rods ................................. 8

12.1 Spring Removal System Board....................8

13 Service............................................. 8

14 Grease Specification......................... 8

15 Parts and Materials .......................... 9

Contents

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

Hytork XL

February 2018

1 Important Safety Procedures

Table 1. Applicable Models

XL 26 XL 281 XL 2586

XL 71 XL 426 XL 4581

XL 131 XL 681

XL 186 XL 1127

XL 221 XL 1372

Hytork XL actuators are only intended for use in

large-scale xed installations excluded from the

scope of Directive 2011/65/EU on the restriction of

the use of certain hazardous substances in electrical

and electronic equipment (RoHS 2).

Installation, adjustment, putting into service, use,

assembly, disassembly and maintenance of the

Actuator is strictly reserved to qualied personnel.

Before installation, operation and maintenance, read

the relevant sections of:

- This manual

- Quick Reference Guide: DOC.QRG.XL

!CAUTION - BEFORE YOU START

• Always disconnect the Air and Electrical

supplies before carrying out any form of

maintenance on an Actuator.

• When removing any ball valve or plug valve

assemblies from a pipe system, isolate the

piping system on which the Actuator is

installed and relieve any media pressure

that may be trapped in the valve cavities

before removing the Actuator for

maintenance.

• Always contain the Spring tension with

Hytork Retractor Rods as explained in

Section 9 (Disassembly procedure).

Follow instructions for using the Retractor

Rod carefully. Only Hytork manufactured

or approved Retractor Rods are to be used

for Spring removal. As with any threaded

tool that is frequently used Retractor Rods

should be checked to ensure that the

threads are not worn or damaged in any

way and greased regularly. Any damaged

or worn Rods must not be used and must

be destroyed.

• Never attempt to ‘BLOW OUT’ the Pistons

or the End caps from the Actuator Body by

using air pressure.

• Never turn the stop screws completely out

when the actuator is under pressure.

Numbers in brackets (#) refer to parts on the exploded

view drawing (Chapter 15). All Hytork XL Spares Kits

are supplied with SAFEKEY assemblies (13/14) cut to an

exact length which will t the circumference of the End

Cap (21) when fully assembled into the Actuator.

Any shortened SAFEKEY must not be used.

If in doubt contact Emerson or your local Hytork

Stocking Distributor. Read the relevant sections

carefully before continuing.

IMPORTANT - STORAGE

• Failure to follow proper storage guidelines

will void warranty.

• Warehouse storage: Hytork Actuators

should be stored in a clean, dry warehouse,

free from excessive vibration and rapid

temperature changes. Actuators should not

be stored on any oor surface.

• On site storage: Hytork actuators should be

stored in a clean, dry warehouse, free from

excessive vibration and rapid temperature

changes. Prevent moisture or dirt entering

the actuator. Plug or seal both air connection

ports.

!WARNING - LIFTING INSTRUCTIONS

• Use lifting equipement as required by

national or local legislation.

• Use lifting straps to lift the assembly of

actuator and valve.

• Do not attach lifting straps to only the

actuator, to lift the assembly of actuator and

valve.

Table 2. Weight of Actuators

Model Double Acting Spring Return with S80 Springs

Kg Lbs Kg Lbs

XL26 1.39 3.06 1.53 3.37

XL71 2.39 5.27 2.78 6.13

XL131 3.90 8.60 4.76 10.49

XL186 4.77 10.52 5.45 12.02

XL221 6.19 13.65 7.76 17.11

XL281 7.02 15.47 9.90 21.83

XL426 7.30 16.10 12.50 27.56

XL681 8.80 19.40 22.50 49.60

XL1127 22.00 48.50 36.00 79.37

XL1372 27.00 59.52 46.60 102.73

XL2586 46.00 101.41 79.00 174.16

XL4581 83.00 182.98 142.00 313.05

Hytork XL

February 2018

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

2 ATEX instructions for use in (potential) explosive areas

2.1 Intended use

The Hytork XL series pneumatic actuators are a Group II category 2 equipment and intended for use in areas

in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or by air/dusts are likely to

occur. Therefore it may be used in (ATEX) classied Zones 1, 2 (Gasses) and/or 21, 22 (Dust).

2.2 Safety Instructions

a. Assembly, disassembly and maintenance, is only allowed at the actuator, when, at the time of the

activity, there is not an explosive mixture.

b. Prevent entry of explosive mixtures into the actuator. We suggest utilizing a solenoid with a

“breather” function on spring return actuators when used in potentially explosive atmospheres.

c. The plastic position indicator caps are approved for ATEX gas group IIB areas.

- In areas where ATEX gas group IIC requirements apply, the plastic indicator for actuator sizes

XL26 to 281 is approved for use.

- In areas where ATEX gas group IIC requirements apply, do not use the plastic position

indicator cap of sizes XL426 up to XL4581, to avoid build up of static electricity.

d. In order to avoid increasing dust explosion risk, periodically clean dust deposits from all equipment.

e. When equipment is installed in a hazardous area location (potentially explosive atmosphere), prevent

sparks by proper tool selection and avoiding other types of impact energy.

f. Proper care must be taken to avoid generation of static electricity on the non-conductive external

surfaces of the equipment (e.g. rubbing of surfaces, etc.).

g. Hytork XL actuators do not have an inherent ignition source due to electro-static discharge, but

explosion hazard may be present due to the discharge of static electricity from other valve assembly

components.

- To avoid personal injury or property damage, make sure that the valve is grounded to the

pipeline before placing the valve assembly into service.

- Use and maintain alternate shaft-to-valve body bonding, such as a shaft-to-body bonding

strap assembly.

h. The paint protection must not exceed 200 μm if the actuator is used in a group IIC atmosphere.

For group IIA or IIB atmospheres the paint protection must not exceed a thickness of 2 mm (0.08”).

!WARNING - SURFACE TEMPERATURE

• The actuator’s surface temperature is dependent upon process operating conditions. Personal injury

or property damage, caused by fire or explosion, can result if the actuator’s surface temperature

exceeds the acceptable temperature for the hazardous area classification. To avoid an increase of

instrumentation and/or accessory surface temperature due to process operating conditions, ensure

adequate ventilation, shielding, or insulation of these actuator components installed in a potentially

hazardous or explosive atmosphere.

2.3 Temperature range for (potential) explosive areas

Table 3.

Temperature Valid for

actuator model

Ambient range ATEX

class

(ATEX surface temperature)

-20..75°C T6 T85°C (185°F) Standard Temperature

models

-20..80°C T5 T90°C (194°F)

-20..80°C T1...T4 T90°C (194°F)

-20..75°C T6 T85°C (185°F) High Temperature

models

-20..90°C T5 T100°C (212°F)

-20..120°C T1...T4 T130°C (266°F)

-40..75°C T6 T85°C (185°F) Low Temperature

models

-40..80°C T5 T90°C (194°F)

-40..80°C T1...T4 T90°C (194°F)

-20..250°C for

2 hours T2 T260°C 500°F) Tunnel application

models

NOTE:

a. The specied values are

valid with the following

conditions:

- Maximum working

frequency of the actuator is

1Hz at a maximum of 50

cycles per hour and at

maximum load.

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

Hytork XL

February 2018

3 Operating Media,

Pressures and

Temperatures

3.1 Operating media

a. Use clean, dry or lubricated air or inert gas.

b. Maximum pressure : 8 barg / 116PSI.

NOTE:

On applications where the spring stroke of single

acting actuators is pneumatically operated, the

maximum pressure is 6.5 bar / 95PSI.

c. Dew point 10 K below operating temperature.

d. For subzero applications take appropriate

measures.

3.2 Operating Temperature range

Using standard seals and greases the operating

temperature range is -20°C to + 100°C (-4°F to

+212°F) as is indicated on the product label.

Other medias and temperatures may be used but

consult your local Hytork supplier for conrmation as

to suitability.

4 Actuator to Valve

Installation

The Pinion drive, coupling device and Valve Stem should

be centered and concentric to prevent any side loading

to the Pinion Radial Bearing and Valve Stem Seat area.

Ensure that the coupling shaft to be operated is a tight

but free sliding t into the female drive in the Actuator

Pinion (19).

4.1 Bi-directional Travel Stops

Hytork XL actuators have two travel stops (22, 23 and

24) for setting acurately the travel and the open and

closed positions. XL2586 and XL4581 can be tted with

the optional Bottom Stop Block for setting the travel.

The actuator has a factory set stroke of 90°. The

adjustable stroke range of the actuator is :

- at closed (0°) position : -3° to +7°

- at open (90°) position : -83° to +93°

NOTE:

If the actuator is assembled for reverse operation,

instead of standard operation, Stop “1” will adjust the

“open” position and stop “2” the “closed” position.

“2” “1”

Stop marked Stop marked

View from above

Fig. 1 Travel Stops

4.2 Travel Stop Adjustments

1. Operate valve/actuator assembly to the

open position.

2. Remove air supply.

3. Slacken locknut (24) on the “closed” stop

(marked “2”).

4. Turn the “closed” stop clockwise to reduce

or counter clockwise to increase the travel.

5. Tighten the lock nut.

6. Connect air and check that the position is

correct. If not repeat from 2.

7. Operate valve/actuator assembly to the

“closed” position.

8. Remove air supply.

9. Adjust “open” travel stop (marked “1”) as

from step 3 to 6.

5 Piping Instructions

All Actuators can be either piped with solid or

exible tubing with the solenoid valve mounted

remotely from the actuator or by mounting a NAMUR

designed solenoid valve DIRECTLY onto the NAMUR

mounting pad on the side of the actuator. (See Fig. 2)

Spring return

actuator operation

Double acting

actuator operation

Fig. 2 Solenoid Operation

Hytork XL

February 2018

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

6 Solenoid Valves on

Spring Return Actuators

It is recommended that on Spring Return Actuators,

the Hytork “CATS” Solenoid Valves are used.

These Valves are specially designed to prevent

contamination of the internals of the Actuator by dirt

from the atmosphere. This increases the working

life of the Actuator which reduces down time and

maintenance periods. (See Fig. 3)

Spring stroke operation Air stroke operation

Fig. 3 Hytork “CATS” Solenoid Valve

7 Position Feedback

All position feedback or positioning accesories, that

comply to the VDI/VDE 3845 (NAMUR) standard, can

be mounted easily on top of Hytork XL actuators. To

access the pinion top, remove the position indicator.

8 Spares

Recommendations

When disassembling and carrying out maintenance work

on the XL Actuator, a Hytork Spares Kit must be used

to replace all ‘O’ Rings, DURASTRIP Bearings, Washers

etc. This Kit is available from Emerson or its Stocking

Distributors.

9 Disassembly Procedure

9.1 End cap and springs disassembly on

Spring Return actuators

1. Release Locking Nuts (24) and remove both

Travel Stops (22) and Thread Seals (23) or

‘O’-rings (23a).

2. Remove the Indicator (7) from the top of the

Pinion (19) For XL26 to XL221 use an Allen

key size 4mm. For the larger sizes the

Indicator can by pulled from the pinion top.

3. Remove both Sealing Bolts (28) and seals

(29) from the End Caps (21).

4. Place both the Hytork Retractor Rods

through the hole in the End Caps and screw

the Rods into :

- For XL 26 to XL 681 the Pistons (20)

- For XL 1127 to XL4581 the Retractor

plate (20a, see also Fig. 4) until

travel is stopped (DO NOT

OVERTIGHTEN) and take care the

nut and washer being free of the

End Cap face.

5. Turn back the Rod 1/2 turn.

6. Screw the adjusting nut and washer by hand

clockwise down the Retractor Rod until they

come up against the face of the End Cap.

7. Prevent the “hold-nuts “ to rotate by one

wrench. Use another wrench, to screw both

adjusting nuts half turn at a time (see Fig. 4)

clockwise down the Rods until the end cap

loosens (Maximum; approximately two

complete turns). This draws the:

- For XL 26 to XL681 the Pistons (20)

- For XL 1127 to XL4581 the Retractor

plate (see also Fig. 4) to the

end caps (21) and compresses the

springs. This Spring-compression,

releases the Spring force and

unlocks the SAFEKEY for removal.

8. Rotate the Caps to ensure that the Springs

are retracted; if the Cap will not turn easily,

a gentle tapping with a plastic hammer

against the endcap will loosen the end cap.

9. Unscrew the two slotted SAFEKEYS (13/14),

and gently pull each SAFEKEY from the Body.

If the SAFEKEY resists removal, gently tap

the End Cap with a soft hammer to assist

release.

10. When both SAFEKEYS have been removed,

use a wrench to rotate the Pinion, driving the

pistons (20) apart until they partially push

the End Caps from the Body.

- For XL 26 to XL681 the Pistons (20),

springs and end cap will come out.

- For XL 1127 to XL4581 the Retractor

plate, springs and end cap will come

out.

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

Hytork XL

February 2018

11. To keep the Spring Pack Assembly intact (see Fig. 4), leave the Retractor Rod in place. To disassemble

the Spring Pack, unscrew the adjusting nut on the Retractor Rod relieving the Spring force, while

preventing the rod from turning with a wrench on the hold nuts.

2/3

End cap disassembly steps

XL26 to XL681

End cap disassembly steps

XL1127 to XL4581

Extractor rods

Extractor

plates

Hold nuts

Adjusting nut

Fig. 4 End Cap Disassembly

9.2 Changing spring sets on XL26 to XL681

If only the springs set of the actuator has to be changed, perform steps 1 to 9. These steps can be performed at

both end caps simultaneously or at one end cap only. After step 9 unscrew the adjusting nut on the Retractor

Rod relieving the Spring force, while preventing the rod from turning with a wrench on the hold nuts.

9.3 End cap disassembly on Double Acting actuators

Remove the SAFEKEY as described previously. The Retractor Rod is not required for Double Acting Actuators.

Remove the End Caps by pulling them free from the Body keeping them square to the end face of the Body.

9.4 Piston disassembly

Rotate the Pinion using a wrench to drive the Pistons apart and remove from the Body by pulling the Pistons.

9.5 Pinion disassembly

Remove the snap ring (Circlip) (6), Thrust Washer (25) and DURASTRIP Thrust Bearing (5) from the top of the

Pinion and CAREFULLY push the Pinion from the Body through the bottom. Take care that the Pinion does not

damage the pinion bores on removal. If necessary, remove any burrs, etc. from the top of the Pinion before removal.

Carefully remove Pinion Top Bearing (9) from the Body.

9.6 Inspection

Clean and examine all parts for damage and wear. Emerson recommends ‘O’ Rings, DURASTRIP Bearings,

SAFEKEYS, Washers, etc. are replaced using a Hytork XL Spares Kit.

Hytork XL

February 2018

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

10 Assembly Instructions

NOTE:

Check the product coding on the actuator’s product

labels to dene which type of grease to use.

For standard actuators

(-20°C to +80°C / -4°F to +176°F):

Castrol High Temperature Grease or

Rocol Sapphire Premier grease (or equivalent)

For low temperature operation

(-40°C to +80°C / -40°F to +176°F):

Castrol Tribol GR TT 1 PD

(previously known as Castrol OPTITEMP TT1)

or LG2 grease (or equivalent).

For high temperature operation

(-20°C to +120°C / -4°F to +250°F):

Castrol High Temperature Grease or

Rocol Sapphire Premier grease (or equivalent)

10.1 Pinion Assembly

1. Lightly grease all ‘O’ Rings, ‘O’ Ring grooves,

bearing grooves and Pinion.

2. Assemble the Top Pinion Bearing (9) to the

Pinion, ensuring that the recess openings are

facing away from the gear form,

then assemble items (8), (17) and (18).

3. Lightly grease the Pinion bores in the

Body (11) and insert the Pinion being

careful not to damage the ‘O’ Rings.

4. When the Pinion is in place, install the

DURASTRIP Thrust Bearing (5), Thrust

Washer (25) and the snap ring (Circlip) (6)

into the narrow groove at the top of the

Pinion (ensuring the snap ring ts properly

into the groove).

5. Only open the snap ring (Circlip) enough to

just clear the Pinion diameter as opening too

far will damage the snap ring. If damage

occurs replace with a new part.

NOTE:

The snap ring (Circlip) has one side with bevelled

edges which must go DOWN onto the Thrust Washer

(25); the square edge side must face UPWARDS.

10.2 Alignment of pinion for correct

piston assembly

Standard rotation is clockwise with the Pistons

moving towards each other (When viewed from

above the slot at the top of the Pinion, see Fig. 5).

Piston assembly for

“Standard” operation

Pinion dot

One body dot for

standard mode

Piston assembly for

“Reverse” operation

Two body dots

for reverse mode

Pinion dot

Fig. 5 Pinion Alignment

10.3 Piston Assembly

10.3.1 Clockwise rotation

(Pistons moving inwards, Fig. 5).

6. Align the Pinion by lining up the center of the

NAMUR slot in the top of the Pinion with the

single dot on the Body. The top of the Pinion is

marked with a single identication dot to indi-

cate the correct orientation of the stop faces.

7. Lightly grease all Piston grooves, gear form

and Piston ‘O’ Rings (4) and t the ‘O’ Ring

(4) and Wear Ring (3) to the Piston.

8. Fit the Bearing Block (10) to the back of the

Piston.

9. Grease the Actuator body bore.

10. Insert the Pistons into the bore, ensuring the

piston racks line up with the pinion gear.

(The part number in the front face of the

Piston must be lined up parallel to the Pinion).

11. Push both Pistons together until they are

both in contact with the Pinion, so that

when the Pinion is rotated clockwise

the Pistons are drawn together. When the

Pistons are together and the racks are

correctly engaged with the Pinion, the top

Pinion drive ats should be at right angles to

the axis of the Body.

10.3.2 Counter-Clockwise rotation

(Pistons moving inwards, Fig. 6).

12. Align the NAMUR slot in the top of the Pinion

with the two dots on the Body and assemble

the pistons so that the Pinion rotates anti-

clockwise as the Pistons are drawn together.

Length

Diameter

Length tolerance : 0 to +5mm / 0” to 0,197”

Diameter tolerance : ±0.05mm / ±0.002”

Fig. 6 SAFEKEY Dimensions

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

Hytork XL

February 2018

Length

Thread

Length tolerance : 0 to +1mm / 0” to 0.04”

Fig. 7 Retractor Rod Dimensions

Table 4. SAFEKEY Dimensions

Model (in mm) (in inches)

Length Diam. Length Diam.

XL26 157 3.175 6.18 0.125

XL71 217 3.175 8.54 0.125

XL131 267 3.175 10.51 0.125

XL186 282 3.175 11.1 0.125

XL221 317 3.175 12.48 0.125

XL281 367 3.175 14.45 0.125

XL426 377 3.175 14.84 0.125

XL681 437 3.175 17.2 0.125

XL1127 517 3.175 20.35 0.125

XL1372 572 3.175 22.52 0.125

XL2856 707 3.175 27.83 0.125

XL4581 937 4.978 36.89 0.196

Model Thread Length

mm. inch.

XL26 1/4-20 UNC 215 8.46

XL71 1/4-20 UNC 215 8.46

XL131 1/4-20 UNC 215 8.46

XL186 1/4-20 UNC 215 8.46

XL221 5/16-18UNC 225 8.86

XL281 M10 210 8.27

XL426 M8 278 10.94

XL681 M12 363 14.29

XL1127 M12 416 16.38

XL1372 M12 416 16.38

XL2856 M20 500 19.69

XL4581 M20 600 23.62

10.4 Travel stop assembly

(See Fig. 1)

13. With the Pistons together, screw in the

CLOSING (cast identity number 2)

Travel Stop (22), complete with Locking Nut

(24) and Thread Seal (23), until it comes into

contact with the Pinion stop face.

14. Rotate the Pinion through 90ø only, driving

the Pistons apart and screw in the OPENING

(cast identity number 1) Travel Stop (22),

complete with Locking Nut and Thread Seal,

until it comes into contact with the pinion

stop face.

For individual position requirements see

chapter 4.

10.5 End cap assembly on double acting

actuators

15. Install the SAFEKEY ‘O’ Ring seals (12) to the

SAFEKEY heads (13).

16. Lightly grease the End Cap ‘O’ rings (2), the

End Cap grooves and the ends of the Body

bore.

17. Taking one of the EndCaps install its ‘O’ Ring

and insert it into the Body.

18. Holding the SAFEKEY close to the entry hole

(cast identity letter C or D) to prevent

kinking, insert the SAFEKEY into the hole and

gently push into place.

19. With the SAFEKEY Head in contact with the

Body, tighten with a screw driver to gently

compress the ‘O’ Ring and create a pressure

seal.

20. Repeat the operation for the other End

Cap. With the Pistons together,

mount the Position Indicator (7) to the top

of the Pinion.

10.6 Spring Return Actuators

10.6.1 Spring set adjustments

The actual selection of the correct spring set can be

done by either referring to the torque charts given

in the literature on Spring Return Actuators or by

consulting your local Hytork representative. After

selecting the appropriate spring set arrange the

springs as indicated below.

Table 5. Spring Rating Chart

Spring set Side of actuator Outer Inner

S40 Left S20

Right S20

S50 Left S30

Right S20

S60 Left S30

Right S30

S70 Left S20 S20

Right S30

S80 Left S20 S20

Right S20 S20

S90 Left S30 S20

Right S20 S20

S1C Left S30 S20

Right S30 S20

Spring Colour Coding

S20 Inner = Green

S20 Outer = Pink

S30 Outer = Brown

Hytork XL

February 2018

Installation, Operation and Maintenance Manual

MAC050515 EN Rev. D

10.6.2 Installing the Springs

1. For XL 1127 to XL4581 place the Retractor

plate on top of the piston.

2. Insert the Springs (26/27) into the face of the

Piston and then the End Cap onto the Springs.

3. Pass the correct Hytork Retractor Rod

through the End Cap (Fig.6) and screw it into

- For XL 26 to XL681 the Pistons (20)

- For XL 1127 to XL4581 the

Retractor plate.

4. Line up the End Cap so that the safety

symbol is correctly positioned for easy

reading.

5. Prevent the “hold-nuts “ to rotate by one

wrench. Use another wrench, to screw the

adjusting nut on the Hytork Retractor Rod in

until the End Cap is completely engaged in

the Body.

6. It will be necessary to push the End Cap into

the Body to overcome the ‘O’ Ring

compression.

7. When the End Caps are in place and the

SAFEKEYS tted correctly, remove the

Hytork Retractor Rods and replace

the Sealing Bolts (28) and seals (29).

11 Testing the Hytork

Actuator

Using compressed air at 80-100 psi (5.5 - 7 bar) check the

seal areas with soapy water, ensuring there are no leaks

and that the Pinion rotates smoothly over its full travel.

11.1 Testing and Cycling of Infrequently

Used or Stored Actuators

Actuators not in current use (i.e. Actuators in storage

or stock and/or not operated for at least a 3 month

period), should be cycled a minimum of ten times

and tested against the possible ‘pre-set’ of the seals.

This is a safety precaution recommended by the Seal

manufacturers.

12 Retractor Rods

12.1 Spring Removal System Board

Hytork’s “SPRING REMOVAL SYSTEM BOARD”

contains a full set of Retractor Rods so that any size of

Actuator can be disassembled on site.

Standard spare parts kits for XL26 to 221 contain

the required Retractor Rods. For XL281 to XL4581

seperate Retractor Rod kits are available. These

Rods are not included in the spare parts kits but are

seperately available.

Ask your local Hytork representative or Stocking

Distributor of Hytork Products for details.

!WARNING - USE APPROVED TOOLS

• The Hytork Retractor Rod tools are specially

designed for the safe removal of the Spring

Return End Cap modules. Only Hytork

manufactured or approved rods are to be

used for Spring End Cap removal.

• As with any threaded tool that is used

frequently, Retractor Rods should be

checked to ensure that the threads are not

worn or damaged in any way and greased

regularly. Any damaged or worn Rods must

not be used and must be destroyed.

• Retractor Rods must be made to the design

specification for safety reasons.

Emerson can not take any responsibility for

any other design.

13 Service

It is the policy of Emerson to give the best possible

service to our customers. We are happy to assist you

in any way we can and if you have any questions about

Hytork Actuators or other Hytork Products please do not

hesitate to contact any Actuation Technologies Center

of Emerson or your local Hytork Stocking Distributor.

14 Grease Specification

Check the product coding on the actuator’s product

labels to dene which type of grease to use.

* For standard actuators

(-20°C to +80°C / -4°F to +176°F):

- Castrol High Temperature Grease or

Rocol Sapphire Premier grease

(or equivalent)

* For low temperature operation

(-40°C to +80°C / -40°F to +176°F):

- Castrol Tribol GR TT 1 PD

(previously known as Castrol

OPTITEMP TT1)or LG2 grease

(or equivalent).

* For high temperature operation

(-20°C to +120°C / -4°F to +250°F):

- Castrol High Temperature Grease or

Rocol Sapphire Premier grease

(or equivalent)

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