ADH 18000


The quality and useful life of anti-corrosion painting is determined by several factors, and the pretreatment and protection of treated surfaces against moisture are the most important factors. Surfaces that have been blasted are completely unprotected against corrosion and must not be subjected to excessive humidity or to the risk of condensation.

The rate of corrosion is high above a certain value of the relative humidity – the critical humidity. Below the critical humidity the corrosion rate is negligible. The critical humidity is about 60%, but it should not exceed 50% in practical situations.

In practice, it has been found that dehumidification is a crucial factor for anti-corrosion painting. The cost of dehumidification is only approximately 4% of the total treatment cost of corrosion preventive painting of a ship’s tanks. Moreover, dehumidification is often a pre-requisite for the correct execution of anti-corrosion painting. This is especially crucial in the painting of blasted surface of a ship’s tanks.

SPEEDO Dehumidifier is engineered specially for internal tank blasting and coating operations in equatorial and tropical climate conditions. The unit also comes complete with a specially designed control panel and can be easily transported by crane or forklift.


Model No.

ADH 18000-A

ADH 18000-B

Air Flow Capacity

18000 CMH

Cooling Capacity

326456 Kcal/hr

Static Pressure


Cooling Media

Air Cool

Work Method

100% Refrigeration / 100% Condensation / 100% Heater



Inlet Air Temperature

20°C to 40°C (±5°C)

Discharge Air Temperature & Relative Humidity

25% & below

Dew Point


Evaporator Coil

Copper tube / Copper fin with Stainless Steel Casing

Copper tube / Aluminium fin with Steel Frame

Condenser Coil

Copper tube / Aluminium fin with Stainless Steel Casing

Copper tube / Aluminium fin with Steel Frame

Control Panel

Traditional Relay Control (IP55 Enclosure)

Compressor Capacity

82 KW

Condensor Motor

6 x 2.2 kw

Blower Motor

30 kw

Electric Heater

54 kw

Total Power Consumption

179.2 kw

Power Supply

380-415 V / 50HZ / 3 phase

Machine Structure


Outlet Connection

6 x Ø280mm

External Dimension

5400 x 2300 x 2502mm (L x W x H)


7.0 Ton