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  5

XTX Second Stage Regulator Maintenance Manual

An Official Inspection consists of:

1. 

A pressurised immersion test of the entire unit to 

check for air leakage.

2. 

Checking for stable medium pressure that is within 

the acceptable range.

3. 

Checking for opening effort that is within the 

acceptable range.

4. 

Checking for smooth operation of the control knob 

and venturi switch.

5. 

A visual inspection of any filters for debris or dis-

colouration.

6. 

A visual inspection of the exhaust valve(s) to see 

that they are in good condition and that it is seating 

against a clean and undamaged surface.

7. 

A visual inspection of the mouthpiece looking for 

tears or holes and checking the general condition.

8. 

Pulling back hose protectors and checking that the 

hoses are secure in the hose crimps.

If a regulator fails steps 1,2,3 or 4  the entire regulator 

should be serviced. If a regulator fails 5,6 or 7 it will be up 

to the technician’s discretion whether or not a full service 

is required. Failure of step 8 requires replacement of the 

Hose.

GENERAL GUIDELINES

1. 

In order to correctly perform the procedures outlined 

in this manual, it is important to follow each step 

exactly in the order given.  Read over the entire 

manual to become familiar with all procedures and 

to learn which specialty tools and replacement parts 

will be required before commencing disassembly.  

Keep the manual open beside you for reference while 

performing each procedure.  Do not rely on memory.

2. 

All service and repair should be carried out in a work 

area specifically set up and equipped for the task.  

Adequate lighting, cleanliness, and easy access to all 

required tools are essential for an efficient repair facil

-

ity.

3. 

During disassembly, reusable components should be 

segregated and not allowed to intermix with non-

reusable parts or parts from other units.  Delicate 

parts, including inlet fittings and valve seats which 

contain critical sealing surfaces, must be protected 

and isolated from other parts to prevent damage 

during the cleaning procedure.

4. 

Use only genuine Apeks parts provided in the 2nd 

stage service kit (AP0219).  DO NOT attempt to 

substitute an Apeks part with another manufacturer’s, 

regardless of any similarity in shape or size.  

5. 

Do not attempt to reuse mandatory replacement 

parts under any circumstances, regardless of the 

amount of use the product has received since it was 

manufactured or last serviced.

6. 

When reassembling, it is important to follow every 

torque specification prescribed in this manual, 

using a calibrated torque wrench.  Most parts are 

made of either marine brass or plastic, and can be 

permanently damaged by undue stress.

COPYRIGHT NOTICE

This manual is copyrighted, all rights reserved. It may not, 

in whole or in part, be copied, photocopied, reproduced, 

translated, or reduced to any electronic medium or machine 

readable form without prior consent in writing from Apeks 

Marine Equipment Ltd. It may not be distributed through the 

internet or computer bulletin board systems without prior 

consent from Apeks Marine Equipment Ltd.

©2006 Apeks Marine Equipment Ltd.

 

XTX Second Stage Maintenance Manual

(AP6209F Issue 1)

INTRODUCTION

This manual provides factory prescribed procedures for the 

correct maintenance and repair of the Apeks XTX second 

stage regulator range.  It is not intended to be used as an 

instructional manual for untrained personnel.  The procedures 

outlined within this manual are to be performed only by 

personnel who have received factory authorised training 

through an Apeks Service & Repair Seminar. If you do not 

completely understand all of the  procedures outlined in this 

manual, contact Apeks to speak directly with a Technical 

Advisor before proceeding any further.

WARNINGS, CAUTIONS & NOTES

Pay special attention to information provided in warnings, 

cautions, and notes that are accompanied by one of these 

symbols:

 

WARNINGS

  indicate  a  procedure  or  situation 

that  may  result  in  serious  injury  or  death  if 

instructions are not followed correctly.

 

CAUTIONS

 indicate any situation or technique 

that will result in potential damage to the 

product, or render the product unsafe if 

instructions are not followed correctly.

 

NOTES

 are used to emphasise important points, 

tips, and reminders.

SCHEDULED SERVICE

It is recommended that the Apeks XTX second stage regulator 

should be serviced annually regardless of usage.

However, If at all unsure about the correct functioning of the 

Apeks XTX, then it must be officially inspected immediately.

All service and inspection details need to be documented 

in the 

Regulator Service Record

 in the back of the Owner’s 

Manual to keep the 

Limited Lifetime Warranty

 in effect.

Summary of Contents for XTX100

Page 1: ...NEPTUNE WAY BLACKBURN LANCASHIRE BB1 2BT Tel 0044 0 1254 692200 Fax 0044 0 1254 692211 E mail info apeks co uk Web www apeks co uk Document No AP6209F Issue 1 30 10 2013 XTX SECOND STAGE REGULATOR MA...

Page 2: ...e carried out by the relevant people listed on the Approved list of signatures which is listed in the Apeks Quality Manual To instigate a change a Task Change request form Form No DESI 10002 must be c...

Page 3: ...ROCEDURES 9 FINAL TESTING 14 CONVERTING THE XTX REGULATOR TO LEFT HANDED CONFIGURATION 15 TABLE 1 TROUBLESHOOTING GUIDE 18 TABLE 2 RECOMMENDED TOOL LIST 19 TABLE 3 RECOMMENDED LUBRICANTS AND CLEANERS...

Page 4: ...nection optional Metal Inserted front cover XTX50 Features include Adjustable cracking control Integrated venturi control Pneumatically balanced valve design Spring Adjuster Suitable for cold water us...

Page 5: ...e 5 Do not attempt to reuse mandatory replacement parts under any circumstances regardless of the amount of use the product has received since it was manufactured or last serviced 6 When reassembling...

Page 6: ...the key number to the Blanking Piece O Ring DISASSEMBLY PROCEDURES NOTE Before performing any disassembly refer to the exploded parts drawing which refer ences all mandatory replacement parts These pa...

Page 7: ...ssed grasp the Knob and pull the Valve Spindle assembly out of the Case 24 Remove the Blanking Piece 8 from the opposite side of the case 7 Remove the two O Rings 7 9 from the Blanking Piece 8 8 Grasp...

Page 8: ...Using a Slotted Seat Adjuster PN AT51 turn the Seat 15 six to seven full turns anti clockwise Since the Seat is O Ring sealed it will not completely unscrew from the Valve Spindle Insert a pair of ext...

Page 9: ...urface should be clean and free of damage Inspect the Exhaust Valve It should be supple and have well defined edges If it looks good there is no need to remove it and it may be reused If there is any...

Page 10: ...into the front of the Shuttle Valve 6 Fit the Valve Spring 33 onto the leading edge of the Counterbalance Cylinder 32 Carefully guide the stem of the Shuttle Valve through the Spring and into the Cou...

Page 11: ...up perpendicular to the Valve Spindle insert the Valve assembly into the Valve Spindle Using your finger press the Shuttle Valve assembly all the way into the Valve Spindle 11 Install a new lubricated...

Page 12: ...t the Case so the O ring is captured 16 While depressing the Lever insert the Valve Spindle through the Venturi Lever and into the Case Be sure that the two flats and the two Lever feet engage in the...

Page 13: ...Cover until it stops Confirm that the Purge Button is properly aligned 22 Add a new lubricated O Ring AP1409 to the male end of the Hose Install a new lubricated O Ring AP1154 into hose swivel end 23...

Page 14: ...lear the second stage flows through the mouthpiece Then inhale slowly but deeply from the mouthpiece A properly serviced and adjusted regulator should deliver air upon deep inhalation without excessiv...

Page 15: ...an Allen key to turn the Adjusting Screw 37 Press the Lever 20 against the Valve Spindle 18 While keeping the Lever depressed grasp the Knob and pull the Valve Spindle assembly out of the Case 24 Remo...

Page 16: ...eft Handed then the arrow must be aligned to the line with LEFT underneath CAUTION Ensure that the parts of the Venturi Lever are firmly pressed together There should be a step as shown in the photo o...

Page 17: ...he Purge Button is properly aligned 18 Screw the Hose onto the second stage Using an 11 16 crows foot and torque wrench and a spanner on the Heat Exchanger tighten the Hose to 5 Nm This Ends the conve...

Page 18: ...first stage intermediate pressure 1 Refer to first stage Troubleshooting Guide 2 Seat 15 adjusted incorrectly Lever 20 set too low 2 Reset Seat preliminary settings and repeat Adjustment Procedures 3...

Page 19: ...llation Setting of Lever Height AT51 Slotted Seat Adjuster Removal and installation of Seat n a Torque wrench Nm or lbf ft Hose and Heat Exchanger n a 11 16 adapter for torque wrench Hose and Heat Exc...

Page 20: ...h Hants PO1 4HH White distilled vinegar 100 gr Cleaning agent Acid bath for reusable stainless steel and brass parts Household grade Liquid dishwashing detergent di luted with warm water Cleaning agen...

Page 21: ...ct with high pressure oxygen enriched air they can pose a very real hazard that can lead to combustion Therefore if a regulator has had use with Grade E or EN 12021 breathing air it should be returned...

Page 22: ...e Medium pressure 9 5 0 5 bar 1 0 to 1 5 in H20 2 5 to 3 7 mbar External Leak High Pressure 50 bar gauge Medium Pressure 9 5 0 5 bar No Leaks allowed Table 4 Torque Specifications PART NUMBER DESCRIPT...

Page 23: ...ase AP5013 Heat Exchanger bright XTX200 25 AP6223 Exhaust Valve AP5013 S Heat Exchanger Satin XTX100 26 AP5803 Plug 7 AP1267 O Ring 27 AP6578 Spring Adjuster 8 AP6211 Blanking Piece XTX Tungsten XTX20...

Page 24: ...xhaust Rib 7 AP1267 O Ring 23 AP6220 R Right Hand Large Exhaust Tee 8 AP6211 Blanking Piece XTX50 24 AP6300 XTX Case AP6211 Y Blanking Piece Yellow XTX Octopus 25 AP6223 Exhaust Valve AP6211 G Blankin...

Page 25: ...green XTX40 Nitrox AP6211 Y Blanking Piece yellow XTX40 20 Octopus 24 AP6300 XTX Case AP6211 G Blanking Piece green XTX40 Nitrox 25 AP6223 Exhaust Valve 9 AP1438 O Ring 26 n a 10 AP6307 40 XTX40 Deca...

Page 26: ...26 XTX Second Stage Regulator Maintenance Manual Notes...

Page 27: ...X Second Stage Regulator Maintenance Manual XTX SECOND STAGE REGULATOR AUTHORISED TECHNICIANS Apeks Marine Equpment Ltd Neptune Way Blackburn Lancs England BB1 2BT MAINTENANCE MANUAL FOR TECHNICAL SUP...

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