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Dampener Safety and Gas Overload Protection Pulsation Dampener Safety and Gas Overload Protection Dampener Safety and Gas Overload Protection

Pulsation dampener, of the gas cushion type:

1. Always de-pressurize both gas cushion, and liquid, before service.
2. Use NITROGEN, (commercially) oxygen free nitrogen, also known as "O.F.N."
This is precaution against a "diesel" explosion.
If oxygen were in the dampener cushion chamber, and if it had been assembled with a hydrocarbon lubricant, and then a sudden pressure increase or shock occurred the rapid compression of the air or oxygen in the presence of hydrocarbon could cause a diesel explosion. The intense heat of the explosion can generate pressures in excess of the failure pressure of the dampener .
The end result could be flying components that endanger life as well as the system to which the dampener is installed.
3. Do not use CO2, instead of Nitrogen. Yes, CO2 is inert, but CO2 will permeate membranes and seals of nearly all known flexible elastomer and plastomer separator types.
4. Always ensure that there is a direct acting relief valve, safety overload protection, or burst disk, in the system. That it is connected in a manner than can not be isolated by a block valve, from the dampener . This is because in the event of a fire, the gas in a dampener will try to expand. Being enclosed, and unable to expand, it will increase its pressure. At the same time the materials of construction will become weaker. In dampener design that are NOT designed to "fail safe", for example those built to ASME (dangerous) code, there may be a burst. The burst will have the stored energy of the pressurized gas behind it. This can spread the fire, endangering the life of emergency response persons.
Note: Even under the CE pressure equipment directive CE marking code, gas burst discs are not mandatory.
If you are in Europe or the USA, you may have a dampener that is not constructed in accordance with our safety design code. This manufacturer removes all warranties of safety in the USA where the equipment is made to ASME or CE rules, so be sure your system is protected by an over-pressure relief device. Also Note: Canada no longer accepts vessels to American code, being adequately safe.
5. Ensure that your mounting method does not prevent built in fail safe features from protecting you.
SEE BELOW:
Pulsation Dampener Safety Difference

Fail Safe Pulsation Dampeners
Do NOT mount beneath anything that could stop gas end swell.
Elastic Elongation of Bolts
Do NOT mount between brackets that could stop bolt elongation.

Pulsation Dampener Safety
Pulsation Dampener Safety
Pulsation Dampener Safety
Pulsation Dampener Safety
Do NOT mount in clamps that could stop end "bell mouthing".

PulseGuard Pulsation Dampeners - print image Dampener Safety and Gas Overload Protection PDF


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