What Is Periodic Maintenance for Cooling Tower (PM)?
Definition of Periodic Maintenance (PM) for Cooling Towers
PM (Preventive Maintenance) refers to scheduled preventive maintenance —
a systematic process of inspection, cleaning, and servicing Cooling Tower systems at regular intervals (monthly, quarterly, or annually) to prevent potential failures before they occur.
Unlike Corrective Maintenance (repair after failure), PM focuses on detecting problems early — helping extend equipment lifespan, reduce system downtime, and maintain maximum operational efficiency.
Why Should Cooling Towers Undergo Regular PM?
Cooling Towers operate continuously under high humidity and direct water contact.
Without proper maintenance, several issues can arise:
❌ Scale buildup inside pipes and fill surfaces, reducing heat transfer efficiency
❌ Rust and corrosion damaging metal components and structural parts
❌ Algae and biofilm growth in basins or fill, causing clogging and contamination
❌ Increased energy consumption, as motors and fans work harder
❌ Risk of Legionella bacteria contamination, which can pose serious health hazards — particularly in hospitals and public buildings
Performing regular PM maintenance keeps Cooling Tower systems clean, safe, and energy-efficient.
Scope of Work — Periodic Maintenance Cooling Tower (PM Scope)
1. System Inspection & Diagnosis
Inspect fan, motor, drive shaft, belt, and gearbox condition
Measure vibration, noise, and operating temperature
Check Basin, Casing, Fill, and Drift Eliminator for wear or damage
Detect water leakage or circulation issues in the system
2. Water Quality Testing
Test pH, Conductivity, Hardness, Alkalinity, TDS, and ORP
Evaluate risk of scale, corrosion, and biological growth
Determine suitable chemical treatment formula and dosing frequency
3. Cleaning Process
Drain water from the Cooling Tower and basin
Clean Fill, Drift, Louvers, and Basin using high-pressure water
Apply specialized chemicals to remove scale, rust, and algae
Rinse the entire water circulation system until clean and pH-balanced
4. Mechanical PM (Maintenance Work)
Perform shaft alignment and check belt tension
Grease bearings and inspect couplings and seals
Check pump pressure, flow rate, and water inlet/outlet valves
Inspect electrical system, sensors, overload relays, and control panels
5. Reporting & Recommendations
Provide detailed Before–After reports after inspection and cleaning
Record water quality, current draw, and cooling performance (ΔT)
Recommend next maintenance schedule and long-term PM plan
Chemicals Used in PM Cooling Tower by Runpar
Runpar Co., Ltd. manufactures and supplies high-quality industrial chemicals specially formulated for Cooling Tower preventive maintenance
| Chemical Type | Main Function | Key Features |
|---|---|---|
| Anti-Scale Chemical | Prevents and dissolves scale buildup | Inhibited formula, non-corrosive to metals |
| Rust Inhibitor | Prevents corrosion and oxidation | Coats and protects metal surfaces, safe for copper and steel |
| Biocide & Algaecide | Eliminates algae and bacteria | Reduces risk of Legionella contamination |
| Neutralizer | Balances water pH after cleaning | Safe before restarting system operation |
All chemicals are tested and certified for safety (MSDS) and proven effective in real industrial applications.
Who Needs PM Cooling Tower Services?
Runpar provides PM Cooling Tower services for both public and private sectors, including:
🏭 Industrial Factories — Chiller systems, heat exchangers, and cooling systems for production machinery
🏢 Office Buildings / Government Agencies / State Enterprises — Central air-conditioning and HVAC systems
🏥 Hospitals — Cooling water sanitation to prevent Legionella bacteria contamination
🏫 Universities / Schools / Research Centers — Cooling systems for laboratories and testing equipment
🏗️ Construction & Energy Projects — Cooling systems for power plants and renewable energy facilities
Recommended PM Schedule for Cooling Towers
Inspect electrical system, pumps, motors, and water quality
Clean fill and basin, check water flow and system balance
Perform chemical cleaning, re-grease bearings, and check alignment
Conduct major overhaul, deep inspection, and replace worn components
Results After PM Cooling Tower by Runpar
🌡️ Improved cooling efficiency (ΔT reduction)
⚙️ Optimized system performance with reduced energy use
💧 Clean water without algae, rust, or odor
🔇 Reduced fan/motor vibration and noise
🧾 Comprehensive Before–After report and official Service Certificate
Runpar’s Cooling Tower PM Standards
Operate under ISO / OSHA / Safety Work Permit safety standards
Technicians certified in chemical handling and high-access maintenance
Provide full documentation: JSA, MSDS, Work Permit, and PM Reports
Contact for Cooling Tower PM Services
Runpar Co., Ltd. 72 Soi 1, Srisamut Road, Paknam Subdistrict, Mueang Samut Prakan District, Samut Prakan 10270, Thailand