Valve Cap Explosion

Valve Cap Explosion 

Short safety talk on working safely when servicing capped valves - avoidance of valve cap explosion.

Author: Star Refrigeration


                                                                                                            Valve Cap Explosion

One of the main circumstances in which respiratory equipment may have to be used is  working in Dusty Places. Dusty Places can be divided into two main types:    

o Nuisance Dust makes breathing uncomfortable and is irritating to the nose and throat. t may also get in the eyes and make work less safe than it would be without it.

o Hazardous Dust is a dust which if inhaled can cause injury to health, e.g. Asthma, Cancer

The Health and Safety at Work Act requires that we have a Safe Place of Work at all times, therefore action must be taken to control nuisance dust. If the dust is also a health hazard control measures must be put in place to satisfy COSHH Regulations.

An assessment of the work and the work environment must be made, including:

Can the dust be eliminated altogether, by?

a) Doing the job a different way.
b) Using different equipment to do the job.
c) Using different material to do the job.
If elimination of the dust is not possible, can control be established, by?

a) Extract ventilation with a fan and suitable ducting.
b) A tent around the dust source to contain it.
c) Damping down and subsequent cleaning up.

If control measures are impracticable or inadequate, respiratory equipment must be provided. Respiratory Equipment should only be a ‘last resort’ control measure against dust.

If the dust is harmful, then overalls, gloves, boots etc will be covered in the dust and will need
to be washed or disposed of in a controlled way.

Coarse dust, occurring for a short time only, e.g. during sweeping up, may be controlled by
wearing face piece dust masks to BS 6061.

If the wearing of any form of respiratory equipment causes you discomfort or breathing
difficulties, go immediately out of the dusty area and take it off.  DO NOT wait until you
are gasping for breath and DO NOT take it off within the dusty area.

If you have any problem with respiratory equipment, or if you suffer from asthma or allergies
to dust, tell your supervisor immediately.

For long periods of protection full-face respirators may be necessary.  These must be suitable
for the dust involved and must fit you properly.

You must be properly trained in using any respiratory equipment provided. You must follow
the training given and take reasonable care of the equipment.

For more information visit

Last modified: Tuesday, 18 February 2014, 12:14 PM