Noise Control
Engineered-to-order pulsation suppression devices for reciprocating compressors: volume-and-choke filtering at the cylinder flanges that intercepts compressor pulsation before it drives piping vibration, fatigue cracking and instrument error, to the residual limits of API 618.
Exterior Interior See It Inside
Drag the handle to compare the closed bottle with the cutaway and see the internals that let steady flow through and stop the pulses.
The simplest dampener is a volume bottle whose gas volume absorbs the flow non-uniformity of each compressor stroke. An engineered dampener goes further: choke tubes and baffles arranged as volume–choke–volume elements form an acoustic low-pass filter. Steady flow passes through; pulsation above the filter’s cut-off frequency is strongly attenuated before it ever reaches the line. Every internal element also adds pressure drop (which costs compressor power), so the design balances enough attenuation to meet the limits against no more pressure loss than necessary, always evaluated together with the compressor and the connected piping.
Built To Your Specification
Pulsation dampeners for API 618 service are engineered-to-order pressure vessels, not catalogue items. Each is sized from an acoustic simulation of the compressor, dampeners and piping, and fixed early, because late changes ripple into layout, supports and skid.
We take the gas composition, the full operating envelope, the cylinder and compressor data, the piping arrangement and the design approach specified for the project, with the applicable pressure-vessel code.
Bottle volumes and volume–choke–volume internals are sized in an acoustic model of the compressor and connected piping, checking residual pulsation, shaking forces and separation margins across the operating envelope.
Dampeners are fabricated and certified as pressure vessels at our own facility, to the approved code and the nozzle arrangement fixed in the study.
Bottles are delivered for installation at the suction and discharge cylinder flanges, with documentation handed over on completion.
From the Knowledge Hub
Where reciprocating-compressor pulsation comes from, the piping vibration and fatigue it causes, how volume-and-choke dampeners suppress it, and how the 6th edition of API 618 frames the design approaches.
Read the articleCapabilities
What pulsation control on a reciprocating compressor actually demands.
Acoustic
Volume–choke–volume internals tuned as a low-pass filter to bring line-side pulsation and shaking forces within the maximum allowable residual levels of API 618.
Protection
Pulses intercepted at the cylinder flanges, before they reach the elbows, branches and small-bore connections where vibration, fatigue cracking and instrument error originate.
Pressure drop
Pressure drop across the suppression devices is balanced against attenuation, because every choke element costs compressor power, a trade-off API 618 addresses explicitly.
Mechanical
Designed and certified as engineered-to-order pressure vessels, with volumes and nozzle arrangement fixed early so the layout, supports and skid can be built around them.
Applications
Reciprocating compressor systems across the process industries: suction and discharge bottles sized to the machine, the gas and the piping.
Oil & gas
Suction and discharge dampeners for reciprocating compressors in refineries, gas processing and pipeline compression, to API 618 service.
Read moreIndustrial & EPC
Pulsation control engineered into new compressor skids and packages, delivered to EPCs as code-certified pressure vessels.
Read morePower & energy
Dampeners for reciprocating machines in hydrogen, fuel-gas and energy-transition service, where gas properties broaden the excitation spectrum.
Read morePressure control
Because they manage gas-borne pressure oscillation as well as noise, dampeners sit in the pressure-control scope as much as the acoustic one.
Read moreMarine & offshore
Reciprocating compression on offshore platforms and vessels, where piping fatigue and small-bore failures carry a high consequence.
Read moreSend us the gas data, the operating envelope, the cylinder and piping details and the design approach. Our engineers will review it and advise on a dampener configuration.
