Introduction To Spx Cooling Tower Fill

SPX Cooling Tower Fill refers to the heat-transfer media used in cooling towers manufactured or supplied by SPX Cooling Technologies (brands like Marley® and Recold®). The fill increases the contact area between warm water and air to maximize evaporative cooling.

Main Types of SPX (Marley) Cooling Tower Fill

1. Film Fill (Most Common)

Water spreads into a thin film over PVC sheets for high heat transfer efficiency.

Popular SPX / Marley film fills:

* Marley F700™

 * High efficiency, low pressure drop

 * Widely used in HVAC & industrial towers

* Marley F400™

 * Thicker sheets, better fouling resistance

 * Suitable for dirtier water

* Marley F1000™

 * High thermal performance

 * Often used where space is limited

* Marley F1200™

 * Optimized airflow and heat transfer balance

Materials

* PVC (standard, up to ~55 °C / 131 °F)

* PP (polypropylene for higher temperatures and harsh water)

2. Splash Fill

Water breaks into droplets by splashing over bars or grids.

SPX splash fill options:

* Marley MBX / MX75 splash bars

* Grid-type splash fill

Used when:

* Water has high solids, oil, or biological fouling

* Industrial processes (steel, power plants, petrochemical)

How to Select the Right SPX Cooling Tower Fill

Key selection factors:

* Water quality (clean vs dirty)

* Hot water temperature

* Cooling range & approach

* Tower type (crossflow or counterflow)

* Maintenance preference

* Drift and pressure drop limits

Replacement & Compatibility

* SPX / Marley fill packs are modular and often interchangeable within the same tower model.

* Many aftermarket suppliers manufacture compatible replacement fill for Marley towers (PVC or PP).

* Correct flute angle, sheet spacing, and pack height are critical for performance.