What Are The Cooling Tower Mechanical Parts​

Here’s a clean, complete breakdown of cooling tower mechanical parts — the components involved in air movement, mechanical drive, and mechanical support. This applies to most brands (Marley, EVAPCO, BAC, Hamon, etc.) and both counterflow and crossflow towers.

 ✅ Cooling Tower Mechanical Parts (Full Breakdown)

1. Fan System

These create airflow through the tower.

Fan Assembly

* **Fan blades** (FRP, aluminum)

* **Fan hub**

* **Fan cylinder / fan stack**

* **Fan guard**

* **Fan blade pitch adjustment hardware**

2. Mechanical Drive System

Responsible for rotating the fan.

Fan Motor

* Electric motor (TEFC or ODP)

* Motor base / motor rails

* Motor sheave (belt-drive systems)

Gear Drive System (for gear-driven towers)

* Gearbox

* Gearbox shafts & bearings

* Gearbox oil seals

* Oil level sight glass

* Oil heater (cold climate)

Belt Drive System (for smaller towers)

* V-belts

* Belt sheaves (fan & motor)

* Belt tensioner

* Belt guards

Driveshaft Assembly

(Used in gear-driven induced-draft towers)

* Driveshaft

* Flexible couplings

* Coupling covers

* Shaft guards

3. Vibration & Alignment Components

Ensure safe running of mechanical equipment.

* **Vibration switch** (manual or automatic reset)

* **Vibration transmitter** (on high-end units)

* **Bearing housings**

* **Bearing supports**

* **Alignment hardware** (shims, brackets)

4. Water Pumping & Distribution (Mechanical Items Only)

Not electrical, not structural — strictly the physical parts that move or spray water.

* **Spray nozzles**

* **Spray headers & branches**

* **Hot water basins** (crossflow)

* **Distribution piping supports**

* **Basin strainers**

5. Mechanical Components of the Casing & Structure

Though structural, they contain mechanical movement or access.

* **Access doors**

* **Fan deck panels**

* **Louvers (adjustable or fixed)**

* **Drift eliminators (snap-on frames, support hardware)**

6. Freeze Protection Mechanical Parts

For cold regions.

* **Basin heater elements**

* **Heater thermostat**

* **Immersion heating wells**

✔️ Summary Table

System	Key Mechanical Parts
Fan System	Fan blades, hub, stack, guard
Drive System	Motor, gearbox, belts, couplings, driveshaft
Vibration & Alignment	Vibration switch, bearings, shims
Distribution System	Nozzles, headers, strainers
Structural/Mechanical	Louvers, drift eliminators, access doors
Freeze Protection	Basin heater, thermostat