Pressure gauge snubbers are devices used in fluid systems to dampen or reduce the effects of rapid pressure fluctuations or pulsations on pressure gauges. These fluctuations can cause mechanical stress, vibration, and inaccurate readings in the pressure gauge. Snubbers help protect the gauge and improve its performance by smoothing out the pressure fluctuations.

Here are the types of pressure gauge snubbers commonly used in industrial applications:

1. Adjustable Needle Valve Snubber:

   • Adjustable needle valve snubbers consist of a needle valve mechanism that controls the flow of fluid into the pressure gauge.
   • By adjusting the needle valve, the flow rate of fluid entering the gauge can be controlled, allowing for precise damping of pressure fluctuations.
   • These snubbers are typically used in applications where the pressure fluctuations are relatively constant and predictable.

2. Fixed Orifice Snubber:

   • Fixed orifice snubbers feature a fixed-size orifice or restriction in the flow path between the process fluid and the pressure gauge.
   • The orifice restricts the flow of fluid into the gauge, reducing the rate at which pressure fluctuations are transmitted to the gauge.
   • Fixed orifice snubbers are simple and cost-effective but may not offer as much control over damping as adjustable needle valve snubbers.

3. Piston-Type Snubber:

   • Piston-type snubbers consist of a piston or diaphragm mechanism that responds to changes in pressure by moving within a chamber.
   • The movement of the piston or diaphragm absorbs the energy of pressure fluctuations, dampening the effect on the pressure gauge.
   • These snubbers are typically used in high-pressure applications or where rapid pressure changes are frequent.

4. Perforated Snubber:

   • Perforated snubbers contain a chamber filled with a porous material, such as sintered metal or plastic.
   • The porous material acts as a filter, allowing fluid to flow into the pressure gauge while dampening pressure fluctuations.
   • Perforated snubbers offer effective damping and are suitable for a wide range of applications.

5. Dashpot Snubber:

   • Dashpot snubbers consist of a piston or plunger mechanism submerged in a viscous fluid.
   • The movement of the piston through the fluid generates resistance, which dampens the effects of pressure fluctuations on the pressure gauge.
   • Dashpot snubbers provide effective damping over a wide range of flow rates and pressures.

The selection of a pressure gauge snubber depends on factors such as the magnitude and frequency of pressure fluctuations, the required level of damping, and the specific requirements of the application. Consulting with a knowledgeable supplier or engineer can help determine the most suitable snubber for a particular application.