Sterling 90-225 CFM, SDA 150-380 Closed Loop Drying System, Dryer Air Flow Diagram

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;Audible/visual critical alarm.

;Fusing for blowers and heaters.

;Dirty Filter indicator for each individual blower.

2-6 The Closed Loop Drying System

Dehumidifying dryers force hot, dry air through the resin in the drying hopper where the air picks up moisture from the material and is drawn back to the dryer.

In the dryer, a desiccant bed strips moisture from the air. The dryer then re-heats dried process air, and sends it back into the drying hopper to dry material again.

This system is a closed loop, because ambient (outside) air is never introduced into the process air. See Figure 2. Our dehumidifying dryers use the closed loop system, because the process air is typically much drier than ambient air, even after carrying moisture out of the plastic resin.

Recycling process air maintains drying efficiency at a consistently high level.

Figure 1-Dryer Air Flow Diagram

Ambient

 

 

From

 

 

drying hopper

Regen

 

 

Process

filter

Regen

Process air

filter

 

bleed

heater

To drying

 

 

 

 

 

hopper

 

Upper valve

 

 

Desiccant

Desiccant

beds

beds

Regen heater

Regen heater

Lower valve

Regen blower

Process blower

Cabinet Series Dehumidifying Dryer

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Contents SDA 150-380 90-225 CFM Cabinet Series Dehumidifying Dryers Bulletin No. WH1-606 Table of Contents TROUBLESHOOTING…………………………….48 Charts and Figures Safety How to Use This ManualSafety Symbols Used in this Manual Description Responsibility General ResponsibilityOperator Responsibility Maintenance Responsibility Reporting a Safety Defect General Information Dryer Air Flow Diagram Closed Loop Drying SystemWhat is Desiccant? Process/Regeneration CycleSpecifying a Drying/Conveying System Installation Connecting Compressed AirPositioning Your Dryer Making Electrical ConnectionsConnecting Cooling Water to the Optional Aftercooler Process Air Connections Between the Dryer and Drying HopperDrying Hopper Control Panel Indicator Lights and Switches Rocker SwitchesControls Indicating LightsSignal to the PLC controller to shut down dryer Typical Dyer Interface Panel Process Air Temperature Controller Identifying Temperature Controller LED IndicatorsProcess Air Dew Point Display Identifying Temperature Controller Buttons Display Button Down Arrow ButtonUp Arrow Button Auto-Tune ButtonE5CK Operating Parameters Available E5CK ModesSetting the Process Air Temperature PLC ControllerPLC LED Indicators Name DescriptionOutput LED Indicators Typical Subpanel Layout Typical Cabinet Dryer Electrical Schematic, Drawing Typical Cabinet Dryer Electrical Schematic, Drawing 222 Setting the Shift on Dew Point Setting the High Dew Point AlarmEntering Operating Parameters to Select Modes Optional Seven Day Timer TimerDisplay Programming the Optional Timer Setting the Current Day of the Week, Hour, and MinuteDaily Timer Operation Checking the Set TimeMultiple-Day Operation Canceling the Settings Day OverrideCabinet Series Dehumidifying Dryer Operation Pre-Startup ChecksStartup ShutdownPage Maintenance Work RulesServicing Process Air Filters Recommendations for Cleaning and Replacing Filters Cleaning with Compressed AirVacuuming WashingPreventative Maintenance Checklist System model # Serial #Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Every two yearsSymptoms of Worn Desiccant Servicing the Dew Point MonitorReplacing Worn Desiccant First AidReplacing the Process Heater Dryer Large bead Type Small bead Type Total per bedLbs Mode Security level Replacing the Regeneration HeaterChanging the Controller Security Level Mode Parameter Setting range Default Factory Mode Parameter Setting range SettingParameter Setting range Option BoardsRestoring Factory Defaults on the Dew Point Controller Option Type RE232C RS-485 Event Input Transfer OutputPID Cabinet Series Dehumidifying Dryer Troubleshooting Problem Possible cause Corrective actionStop the dryer PLC Determining Temperature Controller Errors or Sensor Errors Using a ThermocoupleUsing a Platinum Resistance Thermometer

SDA 150-380, 90-225 CFM specifications

The Sterling 90-225 CFM and SDA 150-380 series represent cutting-edge advancements in air compressor technology, designed for a wide range of industrial applications. Known for their reliability, efficiency, and superior performance, these units are essential tools for professionals seeking high-quality compressed air solutions.

One of the standout features of the Sterling 90-225 CFM series is its impressive flow rate. With a capacity range of 90 to 225 cubic feet per minute, these compressors offer ample airflow to power pneumatic tools and equipment while maintaining optimal pressure levels. The durability of the components used in the construction of this series ensures that it can withstand the rigors of heavy-duty operations while minimizing downtime.

The SDA 150-380 series further enhances this approach with its higher capacity range, accommodating between 150 to 380 CFM. This variant is particularly suitable for larger facilities and demanding applications where sustained airflow is essential. Both series are designed to adapt to various pressure requirements, making them versatile solutions for different industries, including manufacturing, construction, and automotive sectors.

A key technology featured in both series is the use of energy-efficient motors, which significantly reduce operational costs. These motors are designed to deliver high torque at low speeds, ensuring smooth operation and less wear on the compressor. Furthermore, the incorporation of advanced control systems allows for real-time monitoring and adjustments to optimize performance, ensuring that the compressors operate within desired parameters continuously.

Noise reduction is another critical aspect of both the Sterling and SDA series. Innovatively engineered with sound-attenuating materials, these compressors operate at lower decibel levels, providing a more pleasant working environment. This focus on user comfort doesn’t sacrifice performance, as the units are built to achieve maximum efficiency even at reduced noise levels.

The ease of maintenance is another important characteristic. Both models are equipped with user-friendly access points for essential components, simplifying routine checks and servicing procedures. This results in less downtime and improved reliability across the operational lifespan of the compressors.

In conclusion, the Sterling 90-225 CFM and SDA 150-380 series compressors set a benchmark in the industry, offering a blend of performance, efficiency, and user-friendly features that cater to various industrial needs. Their robust construction, advanced technology, and focus on user comfort make them ideal choices for businesses seeking to enhance productivity and reduce operational costs.
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