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Doc. P/N 8.8128.00.3 

Rev. 3 / July, 2020 

 

 

Figure 6 - Pretorquaeble Holder (TQ+/TQ(+) Full Torque Configuration Shown) 

10.

 

Check  gap  between  base  and  hold down.  The gap  must  be the  same  size  on  all sides  of  the assembly.  This 
can  be assured  by measuring  the  distance  between  the  hold down and  base  at  various  places  around  the 
circumference  of the assembly.  Adjust  pre-assembly  screws  if necessary  to provide  an even gap (See  Figure 
7). 

 

 

Figure 7 - Gap Inspection 

11.

 

If holder  configuration  is TQ,  TQ+ or TQ(+) Full Torque,  torque  the  cap screws  to the values  shown  on the 
tag of the holder using crisscross  pattern in 20% increments  until the torque specified on the tag  is achieved 
on all cap screws. The torque values of the flange studs can be found on the tag of the rupture disc. 

CAUTION:  The  torque  value  on  the  tag  of  the  disc  and  the  tag  of  the  holder  may  vary.  Make  sure  to  use  the 
proper value. 

12.

 

If holder configuration is TQ, TQ+ or TQ(+) Full Torque, reconfirm the gap per step 10 after the cap screws are 
torqued. 

CAUTION: For TQ(+) Full Torque, depending on the flange execution do NOT use the torque value as shown on the 
nameplate of the bursting disc. The user must confirm the required load or torque value required when ordering. 

 

 

 

 

Summary of Contents for RD300 Holder

Page 1: ...rotection Overpressure Protection Pressure Activation INSTALLATION AND MAINTENANCE INSTRUCTIONS Reverse Acting Bursting Disc Assemblies SRX SRL RD520 Axius RD320 RD500 Atlas RD300 Holder PRESSURE RELI...

Page 2: ...CIFIC PURPOSE Refer to www fike com terms conditions for Fike s full TERMS AND CONDITIONS OF SALE TERMS OF USE Do not alter modify copy or otherwise misappropriate any Fike product whether in whole or...

Page 3: ...Doc P N 8 8128 00 3 Rev 3 July 2020 PAGE 1 REVISION HISTORY ORIGINAL RELEASE DATE June 2017 REVISION DESCRIPTION OF CHANGE REVISION DATE...

Page 4: ...ly 2020 TABLE OF CONTENTS Section Page No 1 WARNING 3 2 INSPECTION PREPARATION 4 2 1 New Bursting Discs 4 2 2 New Holder 4 2 3 Existing Holder 5 3 ASSEMBLY 6 4 INSTALLATION 9 4 1 Connecting grounding...

Page 5: ...sures less than 20 psig 1 38 barg and an inlet piping length greater than 10 inches 25 cm RD520 Axius and RD320 are not suitable for liquid systems in a size DN20 at burst pressures less than 30 psig...

Page 6: ...isc See Figure 1 3 If foreign material is present carefully clean the bursting disc with a solvent that is compatible with your media Figure 1 Check for damage NOTE Handle bursting disc holders with c...

Page 7: ...s left from the media 5 Check to make sure the gasket faces of the assembly are flat by placing a straight edge across the face If faces are not flat holder is not suitable for use See Figure 3 Figure...

Page 8: ...not required for proper function of the bursting disc assembly Do not install an o ring unless the holder is designed to accept these components by Fike 3 Place bursting disc into holder component wit...

Page 9: ...figure 7 Fragmentation or leaking can occur if this feature is not aligned properly 6 Rotate component with male seat to align side clip holes 7 If holder configuration is insert install side clips a...

Page 10: ...ue the cap screws to the values shown on the tag of the holder using crisscross pattern in 20 increments until the torque specified on the tag is achieved on all cap screws The torque values of the fl...

Page 11: ...spool piece if under a pressure relief valve Refer to Fike Technical Bulletin TB8105 for code requirements WARNING Double check the orientation of the bursting disc Verify flow arrows on the holder a...

Page 12: ...FACES ON ALL SIDES 8 Experience has shown that in some installation conditions it may be necessary to re torque the flange bolting after the system has operated through normal pressure and temperatur...

Page 13: ...Doc P N 8 8128 00 3 Rev 3 July 2020 PAGE 11 Figure 9 connecting grounding grounding holder grounding disc...

Page 14: ...0 Connect the braided SST grounding strip or grounding wire not included to an appropriate ground and the explosion panel Pay extra attention to the grounding connections Install serrated lock washers...

Page 15: ...a nut factor K 0 2 Adjustments to the torque should be considered if the installation utilizes bolting lubrication with a nut factor other than K 0 2 The following expression may be used for correctio...

Page 16: ...1 Mandatory Appendix II guidelines Torque values in Appendix A are based on a nut factor K 0 2 Adjustments to the torque should be considered if the installation utilizes bolting lubrication with a nu...

Page 17: ...Notes...

Page 18: ...NTACT US Fike Europe Toekomstlaan 52 2200 Herentals Belgi Tel 32 14 210031 www Fike com For a list of contact information for Fike offices around the world visit the Global Locations section of Fike c...

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