PECO - Model HPA1 and HPA1-SE -Spark Arrestor Type Silencer

The HPA1 and HPA1-SE (Side Entry) type, spark arrestor exhaust gas silencers are a simple energy converter design that utilises the exhaust gas velocity and differing volumes to create rapid changes in exhaust gas speed. This results in noise energy being converted into heat energy, which is then dissipated into the silencer’s casing or carried away in the exhaust gas flow.

The designs also use reflective principles well known in acoustics to bounce dominant frequencies back on themselves, cancelling each other out. This increases the overall insertion loss to approximately 18dB(A) centred at the lower frequenicies, including the fundamental firing frequency, to give a silencer with medium pressure drop characteristics and good capabilities at the low to middle ranges of the octave band spectrum.

This design also cleverly incorporates a highly efficient centrifugal spark arrestor capability and can be used as a standlone silencer for hazardous marine and onshore applications by meeting requirements for the EEC 98/37/EC and BS EN 1834-1 Machinery Directives and all their amendments.

The units can also be close coupled or remotely mounted to an HSLS, HESLS or HXSLS series, dissipative silencer to reduce the exhaust has noise to a lower, more acceptable emission level dependant upon the actual specifications.