Custom-Engineered DC Motor for Cable Production Line

While DC motors are being increasingly phased out in favor of AC motor + drive combinations, there are still critical cases where a DC motor is the only viable solution—especially in legacy industrial systems where full redesign isn’t practical.

In this recent case, a customer needed a direct replacement DC motor for a cable production machine, ensuring full compatibility with the existing setup and controls. Using our reverse engineering capabilities, we designed a motor that matched all electrical characteristics, mechanical interfaces, and operational constraints of the original unit.

A custom tachogenerator was integrated into the design to ensure proper speed feedback—preserving the system’s control architecture while upgrading reliability.

Highlights:

• Reverse-engineered DC motor

• Custom-designed tacho integration

• Application: Cable production line

• Purpose: Drop-in replacement, extending machine life

Whether for vintage machinery, critical process continuity, or specialist applications, we continue to support DC motor needs with precision, care, and full engineering backup.

Vertical Legacy, Global Reach
Vertical Hollow Shaft Motors for Deep Well Pumping

Vertical Hollow Shaft (VHS) motors are the driving force behind deep well pumps—especially in regions with demanding irrigation and water supply infrastructure. While commonly used in the United States and Middle East, they are less widespread in Europe. However, Greece holds an exception.

In the 1960s, a pioneering Greek pump factory helped introduce VHS technology to the local market. Valiadis S.A. was a key supplier in that effort, helping establish these motors as a viable and durable solution for deep pumping applications.

Fast forward to today, and we’re proud to continue that legacy—combining historical know-how with modern performance standards. Most recently, we delivered two powerful VHS motors, each rated at:

• 600 HP

• 4 poles

• With a water-cooled upper oil-bearing chamber for enhanced reliability

Designed for vertical mounting and hollow shaft coupling, these motors are built for direct connection to pump lineshafts, ensuring smooth, efficient power transmission with minimal footprint.

Applications:

• Deep well pumping

• Agricultural irrigation systems

• Water supply infrastructure in arid regions

Built for depth. Trusted for decades.

Heat-Proof Precision for Steel Operations
Slip-Ring Motors with Brakes for High-Temperature Environments

We recently delivered three specialized slip-ring motors with brakes, designed specifically for steel industry applications where ambient temperatures can reach up to 70°C.

Operating in such harsh conditions requires more than standard industrial motors. These units were engineered with:

• Class H insulation materials, offering superior thermal resistance

• High-temperature brake component treatments, ensuring consistent braking performance

• Slip-ring design, ideal for high starting torque and controlled acceleration—critical in heavy-duty steel operations

Each motor is tailored for reliability and durability under continuous thermal stress, providing safe, repeatable performance in environments where standard motors would quickly fail.

Key Features:

• Custom thermal design rated for up to 70°C ambient temperature

• Braked slip-ring configuration for dynamic and safe operation

• Application-specific build quality for the steel manufacturing sector

From material handling to process-critical lifting, these motors represent a robust solution in some of the most demanding industrial environments.

Maintenance of High-Voltage Impulse Generator for Insulation Testing

Impulse voltage generators are critical tools in high-voltage laboratories. They produce short-duration, high-energy pulses that mimic natural phenomena such as lightning strikes or switching transients. These pulses are applied to transformers, insulators, cables, and other power system components to verify that their insulation systems meet safety and durability standards.

The generator in question is still actively used in a high-voltage test facility. Its continued performance depends on careful maintenance due to the high stresses involved in impulse generation and the ageing of insulation materials over time.

The scope of our work included:

• Internal inspection and cleaning of the stator windings

• Assessment of insulation condition, including insulation resistance and dielectric absorption testing

• Servicing of excitation systems, bushings, and auxiliary devices

Work was carried out on-site, with special precautions due to the size and configuration of the unit. All measurements were documented, and post-maintenance checks confirmed safe and stable operation.

This project highlights the ongoing need to support legacy test equipment, which continues to play a vital role in the development and certification of power transmission infrastructure.

3-Speed Marine Winch Motors with Brake
Stocked and Custom Solutions for Marine Applications

Our Marine Division offers a dedicated line of 3-speed electric motors with brake systems, engineered specifically for winch applications in marine environments. These motors are designed to provide smooth multi-speed operation, secure braking, and robust protection in conditions where reliability is non-negotiable.

Stock Motor Highlights:

• Frame sizes: 225 / 250 / 280

• Poles: 12 / 4 / 2

• Voltage & Frequency: 440 V, 60 Hz

• Maximum power: 105 kW

• Brake torque: 1,500 Nm

• Brake voltage: 110 V DC

• Enclosure: TENV (Totally Enclosed Non-Ventilated)

• Protection features: IP65, oil-tight flange, and space heaters

These motors are available from stock, making them ideal for projects with tight timelines and strict environmental demands.

Tailored Marine Solutions:
In addition to our stocked range, our Reverse Engineering Department specializes in retrofit and customized winch motors. Whether you’re replacing a legacy unit or building a system from scratch, we can deliver application-specific configurations—with attractive lead times.

From standard supply to bespoke design, we keep marine motion under control.

From Motors to Full Integration
Custom-Built Skids for Specialized Petrol Pump Systems

Yes, we supply motors. But what sets us apart is our ability to integrate them directly into your equipment—ready to install, tested, and built to last.

In this recent project, a customer provided their specialized petrol pumps, and we delivered fully assembled skids, complete with:

• Explosion-proof motors

• Gearboxes and couplings

• Precision laser-cut bases

• Electrostatic painting, resistant to harsh and corrosive environments

• Custom forklift cutouts, for safe and easy transport

These weren’t just assemblies—they were purpose-built systems, designed with operational needs in mind and crafted for long-term reliability in the field.

What you get:

• Seamless integration of customer-provided components

• Robust, field-ready assemblies

• Built-in ease of handling and installation

• A flawless, industrial-grade finish—no compromises

This is what we’re all about: turning parts into systems, and systems into peace of mind.

Cooling Tower Fan Motors: Built to Withstand the Elements
Repair, Upgrade, and Protection for Harsh Operating Conditions

Cooling towers are notoriously tough environments for electric motors. They operate in areas saturated with moisture, elevated temperatures, and constant exposure to corrosive air—all of which accelerate wear, rust, and premature failure.

That’s why these twin fan motors are undergoing targeted modifications by our repairs and service department, ensuring they’ll stand up to the challenge and keep running year-round with confidence.

Key environmental challenges:

• Moisture & humidity: High exposure to evaporated water and wet air

• Elevated temperatures: Close proximity to hot process water

• Corrosive atmosphere: Saturated air increases material degradation

What we’re doing:

• Specialized anti-corrosion treatments

• Enhanced sealing and insulation

• Thermal upgrades for better performance in high ambient heat

• Preventive maintenance steps to maximize service life

Our mission: Prevent failure before it starts, and help our customers operate with peace of mind—even in the toughest environments.

BULLETIN

NEWS

Ready-to-Wind
Built in Advance, Wound on Demand

Some projects can’t wait for long production cycles—and others require highly specific winding configurations. That’s why we keep a dedicated stock of complete motors without winding, giving us the flexibility to respond quickly and precisely to our clients’ specialized needs.

This is not a repair program—these are brand-new, unwound motors, fully assembled and stored in our facility, ready to be adapted on short notice. Whether you need:

• 500V motors

• Double-speed motors

• Three-speed motors

• Or other custom winding solutions

…we’re equipped to wind to spec and deliver without delay.

By separating the production of the mechanical body from the winding process, we reduce lead times while maintaining full control over customization. This approach enables us to serve clients faster, reduce waste, and respond to diverse project needs—from one-offs to repeat orders.

It’s a smart inventory strategy—designed with your flexibility in mind.

Custom Marine Retrofit – Built for Speed
Reverse-Engineered High-Speed Motor for Marine Application

Our latest marine delivery is a custom-engineered retrofit motor, built to replace a legacy unit with no available standard equivalent. Designed and manufactured in-house through our reverse engineering system, this motor combines performance, precision, and fast turnaround for urgent marine needs.

Technical Highlights:

• Frame size: 315

• Power: 160 kW

• Speed: 2-pole / 3500 RPM

• Voltage: 440 V / 60 Hz

• Configuration: Y-wound

• Special features:

  • Custom shaft design

  • Custom bearing size for high-speed stability

  • Integrated heater

  • Special steel flange (size 355) for marine mounting interface

Designed specifically for marine operation, this motor delivers smooth high-speed performance and meets the mechanical and electrical constraints of the original installation.

At Valiadis S.A., the marine sector is a key focus of our work. Our in-house team is equipped to reverse-engineer, design, and deliver specialized retrofit motors on short timelines—ensuring that critical systems are back up and running without delay.

Mission accomplished. Motor running.

Custom End-Shields for an Obsolete Small Motor

A small, discontinued motor from Carrier recently arrived at our facility for repair. During inspection, we found that both end-shields had bearing housings out of tolerance, making reliable operation impossible.

Due to the geometry of the original parts, repairing them wasn’t feasible. So, we moved forward with a complete in-house replacement—manufacturing brand-new end-shields from aluminum, using our laser cutting and precision machining tools to ensure an exact fit.

What we did:

• Full motor disassembly and inspection

• Dimensional verification and reverse engineering

• Laser cutting of aluminum raw stock

• Machining of new end-shields to spec

• Assembly, testing, and return to customer

It may have been a small motor, but the attention it received was anything but.

At Valiadis S.A., precision is not reserved for the large and complex. We bring the same level of care to every job—because every motor matters.