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Pulsation Control Device

INERTANCE can perform the pulsation study for reciprocating equipment, and design the pulsation control devices such as low pass filter, pulsation suppression device, pipe support, orifice, pipe geometry, mechanical design, etc. against compressor vibration and pump vibration.

Low pass filter

The addition of simple volume, the specialized low pass filter with practical size can reduce pulsation amplitudes. Even if those filter could not attenuate all pulsation frequencies, the low pass filter is a more effective pulsation control device.

Low pass filter for compressor vibration
Low pass filter for compressor vibration

 

To avoid Compressor Vibration

Pulsation suppression device can be designed as per pressure vessel code (ex. ASME), and its volume (low pass filter) has to be designed sufficiently to control the pulsation levels. Below figure is for typical drawing for pulsation suppression device for reciprocating compressor.

Mechanical Design, Pulsation suppression device
Mechanical Design, Pulsation suppression device

 

Pipe Support

Pipe support is designed as results of mechanical review and piping restraint analysis. Number of supports and location have to be considered with practical solution in order to avoid the mechanical resonance by shaking force and piping vibration.

Pipe support with FEM analysis
Pipe support with FEM analysis

 

Orifice

Orifice plate can be used at various location in piping system to reduce acoustical response at resonant frequencies. The pressure drop resulting from an orifice plate acts as acoustical damping and reduces pulsation amplitudes.

Orifice thickness design
Orifice thickness design

 

To avoid Pump Vibration

Piping engineers can design the pipe arrangement with consideration of pulsation concerns. For example, length of straight pipe and elbow radius can effect the pulsation amplitude as shown in below figures. (ex. short radius elbow (right), long radius elbow (left))

Pipe geometry for pump vibration
Pipe geometry for pump vibration

 

INERTANCE has a capability regarding noise and vibration engineering, and our experts are familiar with assessment of pulsation control design for piping system. For further information, contact us at (admin@inertance.com).

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