YQ-4 Marine Diaphragm Type Air Whistle
Description:
YQ-4 marine diaphragm type air whistle is a navigating device with condensed as sound motive. It is appliable to various ships and boats , and can be used as the source of the alarm signal in the case of clearing of entering a port , shunning in voyage or bad visibility.
Features:
1. Simple structure
2. Reliable quality
3. Clear sound
4. Large air capacity , small air consumption.
Requirements:
It is accordance with the IMO A. 1021(26) Resolution《2009 Alarm and Indicator Rules》and 1972《The inter-national maritime regulations for preventing collisions》Appendix 3 article 1 requirements.
Specifications：
Type:YQ-4
Nominal dimensions:4mm
Nominal pressure:0.59Mpa
1/3 frequency band:≥120dB
Frequency range: 250-700Hz
Hearing distance:0.5mile
Length of ship:12~<20m
Drawing of YQ-4 Marine Diaphragm Type Air Whistle:
L1:360mm
L2:40mm
H:156mm
M:M16x1.5mm
D:Φ124mm
d:Φ6.5mm
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