Rapid Delivery: Two K Series Cast Iron Motors to Uruguay

We recently completed the manufacture and dispatch of two special-purpose cast iron motors, frame sizes 355 and 400, in record time — just one week from order to shipment.

The units were produced to meet an urgent operational need at a port facility in Uruguay, where installation was scheduled to take place immediately upon arrival. The request called not only for power and structural reliability, but for speed — and our team delivered.

Built on the K Series Platform

These motors belong to our K Series product line — known for its heavy-duty cast iron housing, high protection class, and robust thermal design. Commonly used in pumps, blowers, gearboxes, and marine-duty applications, K Series motors combine durability with engineering flexibility.

Key features:

• Frame sizes: 355 and 400

• Protection degree: IP55

• Insulation class F (with 80°C temp. rise limit)

• SKF or NSK bearings with regreasing options

• PTC thermistors in windings

• Heavy cast iron frame with integrated feet

Both units were customized for export and prepared for immediate integration into a critical logistics chain.

A warm thank-you to our production and logistics teams — once again demonstrating that with the right expertise and coordination, impossible deadlines become real solutions.

12 Vertical Hollow Shaft Motors

Supporting Energy Efficiency in Water Management

We have successfully completed the manufacturing and delivery of twelve vertical hollow-shaft electric motors, specially engineered for use in deep well pumping stations as part of a large-scale energy upgrade project.

These motors were designed and built to combine mechanical reliability with energy efficiency, supporting the transition toward more sustainable water infrastructure.

Technical Highlights

• Frame sizes: IEC 160 to IEC 280

• Protection: IP55, with insulation class F (temperature rise limited to 80°C)

• Bearings: Heavy-duty thrust bearing on top, oil-lubricated DE bearing for smooth operation

• Winding protection: PTC thermistors included, PT100 available on request

• Custom engineering: All 12 units built according to NEMA Premium Efficiency guidelines

• Mechanical upgrade: Ratchets constructed with ball mechanisms instead of pins for greater durability and operational reliability

These motors are built for vertical installation in deep well applications, combining structural robustness with continuous performance — especially where axial load and thermal stability are critical.

This project reflects not only our technical capacity, but also our ongoing commitment to providing solutions where efficiency, reliability, and engineering precision align.

Explosion-Proof Motors for Demanding Environments

Not all motors run in ordinary conditions.
Some are installed in places where heat, dust, gas, or pressure can turn a minor fault into a major risk. For those situations, explosion-proof motors are not an option — they are a necessity.

At Valiadis, we stock and supply a wide range of ATEX-certified electric motors, specifically engineered for hazardous environments across industry and marine sectors.

Our motors meet strict international standards and are trusted across installations in oil & gas, chemicals, mining, food processing, grain handling, and more.

Key Specifications

• IEC Frame Sizes: 56 – 400

• Rated Power Example: 45 kW, 400/690 V

• Gas Zones: II 2G Ex db / Ex db eb IIB or IIC (Zone 1 & 2)

• Dust Zones: II 2D IP66 T85°C to T155°C (Zone 21 & 22)

• Temperature Classes: T3, T4, T6

• Cooling / Protection: IC411 / IP66

• Winding & Build: Fully enclosed, insulated, sealed against ingress and ignition

These machines are built to keep turning, even in the most challenging operating conditions.
They work quietly, but never carelessly — delivering the kind of protection, power, and continuity that critical systems depend on.

Arrival of 1000kW Motor — Destination: Serbia

A new arrival at our Thessaloniki stocking and logistics facility: a 1000kW electric motor destined for a pumping application in Serbia.

This unit combines power, efficiency, and application-specific features — part of our ongoing commitment to fast response and project readiness across Southeast Europe.

Project highlights:

• Power: 1000kW
• Speed: 1488 RPM
• Voltage: 690V / 50Hz
• Frame: K450-4, B3, IP55, IC411
• Insulation: Class H
• Winding: Formed winding with low-loss magnetic lamination (M50-350A)
• Special features: Isolated NDE bearing for inverter compatibility

Integrated into our Sindos stocking and logistics hub — the core of our regional inventory — the motor undergoes internal checks before final dispatch.

These deliveries form part of the daily rhythm that links industrial demand to reliable, on-time execution.

Reverse Engineering in Practice: From Legacy to Marine-Grade Performance

On the left, an original Leroy Somer electric motor, purpose-built for a YORK compressor. Specs: 325 kW – 3574 RPM – B35 – IP23 – 660V – 60Hz – Frame 315

On the right, a newly manufactured motor by Valiadis Hellenic Motors, the result of a full reverse engineering process. Although visually similar, it is in fact a new machine—engineered from the ground up, not merely replicated.

This version incorporates:
• A custom-designed shaft for compressor integration
• A bespoke flange adapted to precise mounting requirements
• A reengineered winding layout for thermal and operational optimization
• Full upgrade to marine-grade specs, including materials and insulation systems suitable for vessel operation

Reverse engineering, when done responsibly, is not about imitation—it’s about re-understanding. In this case, our task was to interpret a specific historical design, adapt it to current needs, and align it with modern marine standards. The result is a drop-in replacement motor that not only respects the original application but is also technically and structurally enhanced for more demanding conditions.

These projects are not uncommon in the field, especially when legacy equipment must be maintained but original parts are obsolete or no longer supported. Recreating such motors requires access not only to design capability and machining infrastructure but also to the unwritten know-how of how machines behave over time in real-world environments.

We approach such cases not as vendors but as colleagues—engineers supporting engineers—where the goal is continuity of operations, technical clarity, and enduring performance.

Before & After: Electric Motor Maintenance
Workshop Feature

At Valiadis S.A., we continually invest in technologies that enhance the quality and precision of our work. One of the most effective tools we’ve added to our workshop is ultrasonic cleaning—a process that uses high-frequency sound waves to generate microscopic bubbles in a cleaning solution. When these bubbles collapse, they dislodge dirt, grease, and residues from even the most intricate surfaces, without damaging the underlying material.

This advanced method is now fully integrated into our daily maintenance and refurbishment workflow, ensuring that each component is treated with maximum care and technical efficiency.

The images shown here demonstrate a recent example involving a low-voltage electric motor:

• Background: The motor immediately after undergoing ultrasonic cleaning.

• Foreground: The same motor, fully refurbished and ready for delivery.

At Valiadis S.A., we go beyond standard repair. Our approach blends engineering precision with attention to detail, so that every motor we return is not only functional, but also clean, reliable, and ready to perform at its best.

Refurbished & Revitalized
Maintenance Project Update

Some machines earn their legacy through years of dependable operation. These electric motors, originally delivered in 2007 as part of a major irrigation project in combination with KSB pumps, recently returned to us after nearly two decades of continuous service.

They came in for a scheduled overhaul and bearing replacement—a preventative measure to ensure longevity and optimal performance.

We carried out a full technical inspection, followed by a complete restoration. Our Maintenance Department handled every aspect of the process with care and precision, ensuring all work met the highest standards of quality. Now fully refurbished, these motors are ready to go back into service and continue powering vital irrigation systems for years to come.

Refurbished, revitalized, and set to power many more irrigation seasons to come.

PAD Mounted Motors
Product Highlight

Built for tight spaces and tough conditions.
PAD mounted motors are a smart solution when standard frames don’t fit the layout. Designed without feet (footless configuration), these motors are ideal for ventilation, exhaust, and smoke extraction systems, especially where space is at a premium and performance is non-negotiable.

Their TEAO (IC418) cooling design keeps temperatures under control even under heavy use, making them suitable for harsh environments and emergency scenarios. When installed in smoke extraction systems, they support critical safety performance—helping to maintain visibility and clear evacuation routes during fire events.

Available in IEC sizes 71–355, these motors feature:

• Compact PAD (footless) mounting

• Solid corrosion resistance

• Custom insulation classes and protection levels

• Reliable operation under continuous thermal stress

Engineered for resilience. Ready for whatever the system throws at them.

Winch-Ready Power Below Deck
Marine Brake Motor + Planetary Gearbox System for Naval Application

A planetary gearbox, size 310M, has been expertly paired with a 30 kW marine brake motor to form a powerful drive system tailored for winch applications. Built to deliver high torque with smooth, controlled operation across the entire speed range, this unit is designed for safe and reliable lifting and pulling under demanding conditions.

The system is headed overseas for installation below deck on a naval vessel, where tight spaces and uncompromising performance demand nothing but precision engineering.

To ensure accurate control and full compliance with marine standards, the motor-gearbox system is coupled with a marine-certified LS drive—enabling responsive operation even in harsh maritime environments.

Highlights:

• Planetary gearbox – Size 310M

• Marine brake motor – 30 kW

• Marine-certified inverter (LS drive)

• Designed for naval winch operation

• Optimized for tight spaces and critical lifting tasks

Durable. Controlled. Marine-ready.
This is a solution designed not only to perform, but to endure.

Crane Modernization in Steel Plant
Slip Ring Replacement with High-Efficiency AC Motor + AFE Drive

A major overhead crane operating in a steel plant is entering its next chapter. The existing slip ring hoist motor is being replaced with a modern K315L-6 AC motor, paired with an Active Front End (AFE) drive and encoder feedback—offering substantial improvements in performance, safety, and energy recovery.

The upgrade delivers:

• Smoother motion and precise control through vector-based speed regulation

• Higher efficiency and reduced harmonics via AFE drive technology

• Regenerative capability, allowing energy to be fed back to the grid during lowering operations

• Improved power quality, which supports system stability and reduces stress on the electrical infrastructure

Due to tight installation space, the new motor is equipped with a custom axial forced cooling system to ensure optimal thermal management without increasing the motor footprint—making it ideal for enclosed, high-demand environments like steel plants.

Key Specs:

• Motor: K315L-6

• Cooling: Axial forced ventilation system

• Drive system: AFE + Encoder

• Application: Hoisting operation in steel production

This upgrade is a perfect example of next-generation engineering, built to extend equipment life, improve control, and reduce operational costs in a heavy industrial setting.