GP type muffler is suitable for medium and low air pressure in ventilation equipment, so that the inlet and outlet of centrifugal fan can achieve good noise reduction effect. It is suitable for use in the environment with high noise reduction requirements, but it is not suitable for the passage of water mist, corrosive gas and gas with large dust volume. The gas temperature is required to be less than 200 ℃.

The GP muffler is made of ultra-fine glass wool as sound-absorbing material in the flow passage section, its surface is covered with galvanized steel wire mesh, and the inner tube is composed of galvanized perforated plate and the outer tube is filled with ultra-fine glass wool.