Instruction & Technical Manual | 7
4. Explanation of the dryer’s main components
4.1 Control unit, item ref. 2 on page 6
The top and bottom valve blocks are operated by solenoids within the control unit that
determine the pressure and direction of air flow into the desiccant cartridges.
4.2 Multiport manifold, item ref. 11 on page 6
The dryer is supplied as standard with inlet and outlet ports configured left to right as
viewed from the front of the unit. There are several optional porting arrangements
available by repositioning of port plugs. See also Section 5.2.
4.3 Desiccant cartridge c/w dust filter
The cartridges contain the agent (desiccant) that has been developed for the drying of
compressed air. The desiccant is housed in a clear tube that has a holder permeable to
air at both ends. Located in the top of each cartridge is a 1-micron filter for removal of
residual dust from the desiccant. The length of the cartridge varies with the flow
capacity of the dryer.
4.4 Pressure housing
The cartridges are contained within an extruded aluminium pressure housing and
pressure retaining end plates. Process pressure and flow through each desiccant
cartridge is controlled by means of top and bottom valve blocks located between the
two pressure housings. The regenerating air flow (purge) is controlled by means of a
small orifice plug located externally (front, central) on the top valve block and is
accessible with the front panel removed.
