BD420*W* Dehydrator Series
BD420*W* Automatic Dehydrator, 110-125 VAC 50/60Hz or 208-253 VAC 50/60Hz

Rev : A | Rev date : 12 Jun 2023

The dehydrator removes the moisture from damp ambient air to deliver a reliable, constant, ondemand source of dry and pressurised air, which is critical to prevent the systems from performance and reliability degradation by condensation. The BD4200W series dehydrators offer pressurization solutions to transmission lines and antennas in both telecom and broadcasting applications. Its low pressure models (suffix LP) are suitable for applications where reduced pressure is required, for example, pressurisation of broadcast antenna radomes, microwave waveguides and other transmission lines. The inherent reliability of the BD series design, combined with the high output capacity and remote real-time data capabilities make these units an ideal choice for pressurisation of systems at unattended sites. The BD4200W 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 IP connection.


  • Air Delivery up to 4955L/h
  • Available in 110VAC or 220VAC Power Supply
  • Accurate Humidity Sensing within ±0.1% RH
  • Digital Display of All Operating Parameters
  • Remote Real-Time Data and Alarm Reset Capabilities
  • SNMP Communication Compatible
  • Remote Access via Web Browser Interface
  • Imperial and Metric Unit of Measure Options
  • 8,000 Hour Maintenance Interval
  • Quietest Dryer on the Market

Technical features

General Specifications

Product TypeAutomatic Dehydrator
max. System Volume @Sea Level l41.615
Output Capacity l/hNormal: 3068 Continuous; Maximum: 4955 Emergency
Output Pressure kPa (PSIG)35 - 138 (5 - 20)2.0 - 69 (0.30 - 10)35 - 138 (5 - 20)2.0 - 69 (0.30 - 10)
Ouput Air Relative Humidity %>2 RH
Number of Outlets1
Output FittingSingle, 1/2" NPT female
Noise Level at 3m dBA63
Network Managementvia Web Browser or SNMP through RJ-45 Ethernet Connection


Operating Voltage V110 - 125 VAC, 50 / 60Hz Note: 1208 - 253 VAC, 50 / 60Hz
OperatingCurrent A8.63.9

Mechanical Specifications

Dimension H x D x Wcm124.5 x 53.3 x 64.8


Ambient Temperature Range °C+5 to +30 Note: 2



Standard Alarm - Complete readings of all critical measurement points, individual alarm indication display, including SNMP communication.

High Outlet Pressure Alarm

Low Outlet Pressure Alarm

High Humidity Alarm

High Flow Rate Alarm

High Cabinet Temperature Alarm

High Compressor Last Run Time Alarm


Model NameDescription
P0123146-Month Maintenance Kit for BD420*W* Series
P0114718000 Hour Maintenance Kit for BD420*W* Series
P011752Installation Kit for BD420*W* Series
GLK-1Start up Kit for Dehydrator
PWM2G2-Port Manifold with Pressure Gauges
PWM2GC2-Port Manifold with Pressure Gauges & Valves
MLK-2Start up Kit for 2-Port Manifold
PW4MG4-Port Manifold with Pressure Gauges
PW4MGC4-Port Manifold with Pressure Gauges & Valves
MLK-4Start up Kit for 4-Port Manifold
PWM8G8-Port Manifold with Pressure Gauges
P8WMGC8-Port Manifold with Pressure Gauges & Valves
MLK-8Start up Kit for 8-Port Manifold
TUBE-38OD-PONGas inlet adaptor 1/8” NPT for 3/8” OD tube
TUBE-M12-G18Gas inlet Adapter M12x1.5 - G1/8

Screen image showing remote display of dehydrator status and alarms

External Document Links


Note 1: (15 Amp service recommended)

Note 2: Unit will go into SHUTDOWN mode if cabinet temperature exceeds 49°C