Results 1 to 4 of 4

Thread: Proof Test Interval for Conveyor Holdbacks/backstops

  1. #1
    ajithkocheril Guest

    Proof Test Interval for Conveyor Holdbacks/backstops

    Hi all,

    I’m based in Queensland, Australia. Australian standards requires the designer to specify a proof test interval for conveyor backstops ( mandatory). Just wondering if any one can share the procedure and frequency of this test?

    The standards also recommend monitoring wear and effective operation of holdbacks. However, I have not come across any proven methods for achieving this. Please provide some info in this regard too.

    *We use dual backstops mounted on an intermediate shaft inside gearbox.


  2. #2
    Teus Tuinenburg

    Professional Experience 55 Years / 9 Month Teus Tuinenburg has 55 Years and 9 Month professional experience

    Discussions 221 Teus Tuinenburg acceded to 221 discussions, Publications 0 Teus Tuinenburg Tuinenburg released 0 publications

    Know-How Conveying (1488) Teus Tuinenburg used this tag 1488 times, Pneumatic Conveying (1278) Teus Tuinenburg used this tag 1278 times, Pneumatic (571) Teus Tuinenburg used this tag 571 times

    Dear Ajit,

    Have the Australian standards not described the specification for a proof test interval for conveyor backstops ( mandatory)?

    If they have not, then they can reject any test.

  3. 1. I cannot share,
    1a. Regarding the frequency, perhaps a FEMA is a practicable option.
    2. For low speed holdbacks, I am aware of: load testing, and measurement [i.e. "strain gauge"].
    I am aware of a minimum of two off low speed holdback manufacturers, that retail in Australia, that have a position regarding this matter.
    Perhaps the following is off topic, however generally speaking, according to me: if holdbacks are required, the holdbacks must be low speed.


  4. #4

    Some backstops just don't work.

    It seems like this Australian standard might have been written for Ireland.
    Seriously though: it is not specific & therefore not acceptable as a standard. (Which is also the Brexiteers' view)
    To test you need to bring a fully laden conveyor to rest; check the brake is on; uncouple the motor & release the brake.
    If the conveyor doesn't run back then the sprag is working.
    Its not rocket science: unless you want to find somewhere to bond a strain gauge into the workings & then calculate....what?
    The standards recommendation to monitor wear & operation is covered in my 3rd sentence except for my ignoring 'effective' because either it slips or doesn't slip (effectively writing)
    Holset used to make a gradual release holdback to release the locked in tension after a stall (NCB rules after a fatality). So please remember to make sure nobody is in a place of danger when you do your test.
    John Gateley

Similar Threads

  1. Pipe Conveyor Test Rigs: Design, Application and Test Results – Part A (M.E. Zamir...
    By drottboommarcel in forum bulk solids handling - Vol. 34 (2014) No. 5
    Replies: 0
    Last Post: 19th September 2018, 7:04
  2. Interval Impactors for Difficult Bulk
    By Author in forum Product Presentations
    Replies: 0
    Last Post: 25th March 2013, 10:52
  3. Holdbacks as Workforce Safety Devices?
    By Sideshow in forum Trough Belt Conveying
    Replies: 11
    Last Post: 15th September 2012, 17:42
  4. Belt Conveyor Holdbacks
    By kiruba sankar in forum Trough Belt Conveying
    Replies: 18
    Last Post: 15th July 2012, 18:11
  5. Confidence Interval
    By wengermel1973 in forum Sampling, Inspection & Statistics
    Replies: 2
    Last Post: 21st August 2007, 7:31

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Single Sign On provided by vBSSO