Vertical Shaft Cooling Tower Motor

A vertical shaft cooling tower motor (often called VHS motor) is the standard motor used in induced-draft cooling towers, especially for HVAC, power plant, and industrial cooling systems. Below is a clear, buyer-focused guide you can use for sourcing, selection, or product listing.

  What Is a Vertical Shaft Cooling Tower Motor?

A vertical shaft cooling tower motor:

* Is mounted vertically on top of the cooling tower

* Drives the fan directly or via gearbox

* Is designed to handle high axial (thrust) loads

* Operates continuously in hot, humid, corrosive environments

Common name:

VHS (Vertical Hollow Shaft) Cooling Tower Motor

⚙️ Typical Specifications

Mechanical

* Shaft type:

 * Vertical Hollow Shaft (VHS) – most common

 * Vertical Solid Shaft (VSS)

* Thrust capacity:

 * Standard / Medium / High thrust

* Mounting:

 * Flange mounted (P-base)

* Bearing:

 * Heavy-duty thrust bearing (SKF / NSK)

Electrical

* Power range: 5.5 kW – 315 kW (7.5 HP – 400 HP)

* Voltage:

 * 380V / 400V / 415V / 440V / 460V

* Frequency:

 * 50Hz / 60Hz

* Insulation: Class F (Temp rise B)

* Duty: S1 Continuous

* Efficiency: IE2 / IE3 / IE4

Protection

* Enclosure: TEFC

* Protection class: IP55 / IP56

* Anti-corrosion: Epoxy coating, stainless hardware

* Drain holes: Moisture protection

Main Applications

* HVAC cooling towers

* Chiller condenser cooling towers

* Power plant cooling towers

* Petrochemical & refinery cooling towers

* Replacement for Marley / BAC / EVAPCO / SPX towers

China Supplier Advantages

Chinese manufacturers offer:

✔ OEM / private label

✔ Custom shaft diameter & keyway

✔ UL / CE / ISO / CCC available

✔ Competitive price for export

✔ Fast lead time (7–20 days)

Major production areas:

Zhejiang • Jiangsu • Anhui (Wannan Motor zone)

⚠️ Key Selection Tips (Very Important)

1. Confirm thrust load (fan + coupling + gearbox)

2. Match shaft diameter & length

3. Choose IP56 for coastal / chemical plants

4. Ensure inverter-duty if using VFD

5. Ask for vibration & run test report