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BD550W Series
Dehydrator for broadcast applications

Rev : 05 | Rev date : 24 Oct 2022


The BD550W series dehydrators are used for pressurisation of broadcast antennas and transmission lines. The dehydrator removes the moisture from damp ambient air to deliver a reliable, constant, on-demand source of dry, pressurised air. 
The inherent reliability of the BD series design, combined with the high output capacity make these units an ideal choice for pressurisation of systems. Low pressure systems (suffix LP) are available for applications where reduced pressure is required, for example; pressurisation of broadcast antenna radomes, waveguide and transmission lines.
The BD550W Series dehydrators employ a fully digital operating platform offering the most accurate readings of operating variables, either from the front panel or by a remote connection.


  • Operating  pressure can be changed by a simple adjustment at the dehydrator
  • Remote Real-Time Data and Alarm Reset Capabilities
  • SNMP Communication Compatible
  • Digital Display of All Operating Parameters
  • Imperial and Metric Unit of Measure Options
  • 8,000 Hour Maintenance Interval
  • Compact and Lightweight
  • Versatile Installation
  • Ultra Quiet Compressor


Product Type   Automatic Dehydrator


    BD550W BD550WLP BD552W BD552WLP
Output Capacity l/hr
Normal: 413 (350) Continuous
Maximum: 649 (550) Emergency
Power Requirement   110 - 125 VAC, 50 / 60Hz
(15 Amp service recommended)
208 - 253 VAC, 50 / 60Hz
Operating Current A 7 3.5
Outlet Pressure Range kPa
13.8 - 103.4
(2 - 15)
2.07 - 51.71
(0.30 - 7.5)
13.8 - 103.4
(2 - 15)
2.07 - 51.71
(0.30 - 7.5)
Outlet Air Relative Humidity   Less than 2% RH
Compressor Type   Two-cylinder, 1/3 HP, Oil-less Type
Dehydrating Method   Heatless Desiccant
Environment Operating Temperature Range °C (°F) 5°-30° (40°-85°)  Ambient
*Unit will go into SHUTDOWN mode if cabinet temperature exceeds 49° (120°)
Noise Level at 3m (10ft) dBA 48 
Alarms   Standard Alarm - Complete readings of all critical measurement points,
individual alarm indication display, including SNMP communication
Outlet Connections   3/8" Press-to-Lock tube fitting
Depth x Width x Height
cm (in) 30.5 x 43.8 x 68.6 (12 x 17.25 x 27)
Weight kg (lb) 33.6 (74)


Kit Number   Description
GLK1   Gas Line and accessories kit for BD210, BD550 & BD1500 Series dehydrators
P013478   6 Month Maintenance Kit
P013479   8000 Hour Maintenance Kit
P011674   Universal Rack Mounting Kit
P011773   Wall Rack Mounting Kit

Additional Accessories 

Kit Number   Description
PWM2G   2-Port Manifold with Pressure Gauges
PWM2GC [Note 1] 2-Port Manifold with Pressure Gauges & Check Valves
PWM4G   4-Port Manifold with Pressure Gauges
PWM4GC [Note 1] 4-Port Manifold with Pressure Gauges & Check Valves
PWM8G   8-Port Manifold with Pressure Gauges
PWM8GC [Note 1] 8-Port Manifold with Pressure Gauges & Check Valves
P8741SFM   Single Pipe Panel
P8741DFM   Dual Pipe Panel
PFMP2310   Flow Distribution Panel

Note: 1.  Manifold units with check valves are not recommended for pressurising antennas with dual feedlines.   

Screen image showing remote display of dehydrator status and alarms

PWM4G :  4-Port Manifold with Pressure Gauges