Desiccant dryer RPA

rotaryfor plasticswith heat exchanger

Overview
The RPA mould dryer provides conditioned, low-dew-point air for mould enclosures to prevent condensation. It operates in open or closed loop and can serve a single machine or multiple machines. PID control ensures a consistent dew point; unit is designed for fast start-up and requires no operator settings.

Applications

• Mould enclosures of fast-cycle injection moulding machines (IMM)
• Mould enclosures of blow moulding machines
• Mould enclosures and robot areas for PET injection moulding

Drying principle
The drying action combines two stages:

• Pre-condensing phase: cooling water reduces bulk humidity.
• Drying phase: internal desiccant rotor (rotary wheel) lowers the dew point of process air.

Key features

• Air flow range: 400–2,900 m3/h
• Dew point capability down to approx. -15°C
• PID microprocessor control for stable dew point
• Operates in open or closed loop; suited to single or multiple machines
• Optional post-cooler to adjust air temperature entering the enclosure
• Automatic regulating valve to minimise cooling water consumption
• Compact footprint for mezzanine or floor installation near the primary machine
• Easy maintenance and fast start-up (no operator settings required)
• RPANext option: PLC control with 7" touch display and multilingual interface (10 languages)

Technical specifications

• Model name: RPA
• Type: mould dryer (desiccant rotor with pre-condensing)
• Air flow range: 400–2,900 m3/h
• Process dew point: down to approx. -15°C
• Ambient operating temperature: up to 45°C
• Ambient relative humidity: up to 85% (page references also cite up to 90%)
• Control: PID microprocessor control
• Loop operation: open or closed loop capability
• Installation: compact layout for mezzanine or floor near primary machine
• Maintenance: designed for easy access and quick filter service
• Options: post-cooler, RPANext (PLC + 7" HMI), closed-loop version, mould enclosure and accessories