Kahlenberg KM-DVM-H air horns are suitable for vessels over 75m (246ft) with some models being suitable for ships over 200m (656ft). They are ruggedly constructed to withstand the harshest of marine environments and capable of operating in temperatures as low as -40°C and up to +80°C.
All Kahlenberg KM-DVM-H air horns have a valve assembly allowing them to cope with a wide range of supply air pressure variation, from 75psi-580psi (5 bar-40 bar). They are designed with a horizontal diaphragm head so that moisture self-drains away from the seat of the stainless steel diaphragm assembly.
There is a lot of built-in reliability and redundancy with these horns. They feature heated, thermostatically controlled combination manual override and dual electric solenoid valves (230VAC/120VAC and 24VDC) as well as a heated diaphragm. The horn itself is made of cast marine aluminium for the bell, with a brass valve assembly. It is protected to IP 56.
The usual finish is marine grey but white finish is optional.
KM-250-DVM-H air horn
This unit is suitable for ships from 75m-200m (246ft-656ft) and as an IMO audibility range of 1.5nm. Its fundamental frequency is 250Hz and it has an SPL (1/3 octave) of 139dB.
The KM-250-DVM-H measures 557mm x 350mm x343mm (22in x 14in x 14in) and weighs 12kg (29lb). Air consumption is 105 SCFM (50l/s) at 120psi (8 bar).
KM-135-DVM-H air horn
This unit is suitable for ships over 200m (656ft) and as an IMO audibility range of 2nm. Its fundamental frequency is 135Hz and it has an SPL (1/3 octave) of 144dB.
The KM-250-DVM-H measures 1378mm x200mm x559mm (55in x8in x22in) and weighs 21kg (46lb). Air consumption is 105 SCFM (50l/s) at 120psi (8 bar).
Listen to the KM-135-DVM-H air horn