Snubbers

Snubbers are pressure gauge accessories designed to help reduce pulsation, pressure fluctuation and pointer movement in suitable industrial installations. Using an adjustable restrictor principle, they help damp the pressure impulse reaching the gauge for clearer local pressure indication.

This collection includes snubbers for BSP and NPT pressure gauge connections, supporting maintenance replacement, OEM equipment and new process instrumentation installations where compatibility with the gauge, media and operating environment has been confirmed.

Pressure gauge snubber selection

Snubbers are pressure gauge accessories used to help reduce the effect of rapid pressure fluctuations, pulsation and sudden pressure changes on a gauge. By restricting the pressure impulse reaching the instrument, a snubber can improve pointer stability and support more reliable local pressure indication in demanding applications.

These components are commonly selected for systems where pumps, compressors, hydraulic circuits or reciprocating equipment can create vibration or pressure spikes. An adjustable restrictor can be useful where the level of damping needs to be set during commissioning or maintenance, depending on the behaviour of the process and the gauge response required.

When selecting a snubber, check the pressure gauge connection, process connection, thread form and installation layout. BSP and NPT options should be matched carefully to the existing gauge and pipework. Consider the process media, working environment, temperature and whether the snubber is being fitted as part of a new installation, OEM equipment build or industrial replacement.

Pulsation control

Snubbers help damp pressure pulsation and sudden fluctuations before they reach the gauge, supporting steadier pointer movement and clearer local pressure readings.

Adjustable restriction

Adjustable restrictor designs allow damping to be set to suit the behaviour of the pressure system, rather than relying on a fixed restriction in every application.

Thread compatibility

BSP and NPT connection options should be matched to the gauge and process connection to maintain installation compatibility and avoid unsuitable thread combinations.

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Typical snubber applications

Pressure gauge snubbers are used where pulsation, vibration or pressure surges can affect gauge readability or instrument life. They are commonly specified for maintenance, process plant, machinery and OEM equipment.

Pump discharge lines

Pumps can generate pulsating pressure that causes pointer flutter. A snubber helps smooth the pressure impulse reaching the gauge for more stable indication.

Hydraulic systems

Hydraulic equipment may experience rapid pressure changes during operation. A suitable snubber can help protect the pressure instrument from sharp impulses.

Compressor installations

Compressor systems can create vibration and pressure ripple. Snubbers are often used with gauges to improve readability in these operating conditions.

Process and maintenance points

Snubbers can be fitted at local pressure indication points where existing gauges show excessive pointer movement or where replacement accessories are required.

How to choose snubbers

Selecting the right snubber depends on the pressure gauge, connection type and operating conditions. Check compatibility before installation, especially when replacing an existing pressure gauge fitting.

Match the thread form

Confirm whether the installation uses BSP or NPT threads and ensure the snubber matches both the gauge connection and the process connection.

Consider pulsation level

Select a snubber appropriate for the severity of pressure pulsation or pointer movement. Adjustable restrictor types can be useful where damping needs to be fine-tuned.

Check media suitability

Review the process media and working environment before selection. Do not assume a snubber is suitable for every fluid, gas or operating condition.

Review installation layout

Allow for the gauge orientation, available space, isolation valves and any other pressure gauge accessories fitted between the process and the instrument.

Snubber FAQs

These common questions cover selection, compatibility and practical use of pressure gauge snubbers in industrial installations.

What does a pressure gauge snubber do?

A pressure gauge snubber restricts the pressure impulse reaching the gauge. This helps reduce pointer flutter caused by pulsation, vibration or rapid pressure changes.

When should I use an adjustable restrictor snubber?

An adjustable restrictor snubber is useful when the required damping level is not known in advance or when the gauge response needs to be adjusted during commissioning or maintenance.

Are BSP and NPT snubbers interchangeable?

No. BSP and NPT are different thread forms and should not be treated as interchangeable. Match the snubber thread to the gauge and process connection.

Can a snubber protect a gauge from all pressure spikes?

A snubber can help reduce the effect of pulsation and rapid pressure changes, but suitability depends on the application, media, pressure conditions and complete installation design.