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• Dampener Drawings and Animations
  • Flow Through Flexible Elastomer Tube
  • HP System Liquid in Elastomer Membrane
  • LP System Liquid in Elastomer Membrane
  • Precharge Gas in Elastomer Bladder
  • High Pressure FlexFlon PTFE Diaphragm
  • Low Pressure FlexFlon PTFE Diaphragm
• Pulsation Dampeners
  • PTFE Diaphragm / Teflon Membrane Types
    • AODD Pump Dampeners with Plastomer Diaphragm
    • Diaphragm Metering Pump Dampeners with Plastomer Diaphragm
    • Hose Pump Dampeners with Plastomer Diaphragm
    • Lobe Pump Dampeners with Plastomer Diaphragm
    • Low Pressure Dosing Pump Dampeners with Plastomer Diaphragm
    • Multi Diaphragm Metering Pump Dampeners with Plastomer Diaphragm
    • Packed Plunger Pump Dampeners with Plastomer Diaphragm
    • Progressive Cavity Pump Dampeners with Plastomer Diaphragm
    • Vane Pump Dampeners with Plastomer Diaphragm
  • Elastomer Bladder / Flex-Tube Types
    • Flex-Tube - Acceleration Head and Interception Type
    • Nitrogen Gas in Elastomer Bladder Type
    • System / Process Liquid in Elastomer Bladder Type
  • Acoustic / No Moving Parts Types
    • Frequency Reduction Type
    • Phase Change Type
    • Pulse Dispersal Type
    • Pulse Intensification then Dissipation Type
• Pulse Dampening, Safety, Applications
  • Snubbing, Surge Suppressors, and Shock Absorbing
    • Flow Fluctuation / Suction Systems - Pressure Pulsation / Supply Lines
    • Pressure Pulsation Pulse Signatures
    • Pressure Pulsation Dampeners for Transients and their Interception
    • Pulsation Dampeners for Amplitude of Pressure Wave Spikes
    • Pulsation Dampeners and Pump Vendor Responsibilities
    • Acceleration Head / Pressure that a System Could Create
    • Dampener Flow Smoothness Requirements
  • Pressure Pulsation Dampener Safety
    • Checking Dampener Pressure Rating Safety
    • Checking Required Pulsation Dampener Performance
    • Pre-Filling Dampeners with Nitrogen Cushion Gas
    • Pre-Filling Pulsation Dampeners at Elevated Pressures
    • Pre-Filling Pulsation Dampeners with Pin Core Valves
    • Safe Levels of Pulsation for Preventing Fatigue
    • Dampener Safety and Gas Overload Protection
    • Pulsation Dampener Safety and Liquids
    • Pulsation Dampener Safety and Piping
    • Pre-Filling Pulsation Dampeners with Strut Valves
  • Pulsation Dampener Applications
    • Shock Alleviation / Multi-Head Interaction
    • Double Layer, 2 Sheet PTFE, Diaphragm Metering
    • Flow Fluctuation Smoothing
    • Suction Problems with High Pressure Systems
    • Packed Plunger / Piston Pumps
    • Packed Plunger / Piston Pumps 2
    • Peristaltic and Tube or Hose Pumps
    • Plastic / A.O.D.D. Pump Systems
    • Pressure Pulse Dampening
    • Test and Injection Systems
• Dampeners by Pump

Pulsation 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:

Do NOT mount beneath anything that could stop gas end swell. Do NOT mount between brackets that could stop bolt elongation. Do NOT mount in clamps that could stop end "bell mouthing".

Dampener Safety and Gas Overload Protection PDF