Control and Protection of Critical Rotating Machinery
Governing, protection and monitoring equipment for turbines, synchronous generators and compressors of high importance in the process. Covers speed governors, excitation, anti-surge control, vibration sensors, hydrogenerator monitoring, bearings and couplings.
Governing, protection and monitoring for turbines, generators and compressors
Which product types do we supply?
- Speed Governors for TurbinesMaintain turbine speed through an actuator and valve and include independent overspeed protection. · Steam turbines in thermal power plants, Gas turbines for generation and drive, Small and medium hydropower plants, Compressor and process pump drives
- Excitation Systems and Generator ProtectionRegulate the voltage and reactive power of the synchronous generator and protect it against internal faults. · Thermal and cogeneration plants, Hydropower plants, Synchronous generators on industrial sites, High-power standby units
- Anti-Surge Controllers for CompressorsPrevent the compressor from entering surge by opening the recycle valve in time. · Gas compressors in refineries and petrochemicals, Natural gas compression stations, Air compressors in air separation units, Process compressors in the chemical industry
- API 670 Vibration Protection and Proximity SensorsMeasure shaft and casing vibration and command machine shutdown at a dangerous level. · Centrifugal compressors and blowers, Steam and gas turbines, High-speed process pumps, Large generators and motors
- Hydrogenerator Monitoring: Air Gap and Partial DischargeTrack the air gap and the condition of the stator insulation in operation, for planned interventions. · Large and medium hydropower plants, Pumped-storage plants, Refurbishment of old hydrogenerators, Large low-speed synchronous motors
- Tilting-Pad Bearings, Magnetic Bearings and Turbine CouplingsSupport the rotor and transmit torque through hydrodynamic bearings, active magnetic bearings and diaphragm couplings. · Process compressors and expanders, Steam and gas turbines, Hydraulic turbines and generators, High-speed pumps and gearboxes
Which brands do we quote in this category?
- Basler Electric
- Bearings Plus
- Calnetix Technologies
- CCC – Compressor Controls Corporation
- Celeroton
- ComAp
- DEIF
- Duramax Marine
- Energy Control Technologies (ECT)
- Heinzmann
- HEINZMANN Regulateurs Europa
- Iris Power
- Kingsbury
- KONČAR (excitation systems)
- MECOS
- Meggitt vibro-meter
- Miba Industrial Bearings
- Michell Bearings
- PROGNOST Systems
- R&D Dynamics Corporation
- REIVAX
- Riverhawk Company
- Shinkawa Electric
- SpinDrive
- Synchrony (Johnson Controls)
- Thordon Bearings
- Turbo Research (TRI)
- VibroSystM
- Waukesha Bearings
- Woodward
- Connection Technology Center
- Metrix Instrument
And more brands on request: send us the code or the nameplate of the item.
Spare parts and accessories
- Proximity probes and extension cables
- Drivers and signal conditioning modules
- Magnetic speed sensors
- Electrohydraulic actuators and servo valves
- Capacitive couplers for windings
- Intrinsic safety barriers
- Spare modules and boards for controllers
What we do for you
- Identification of equipment by the code on the nameplate
- Quotation by code or by parts list
- Checking of compatibility with existing equipment
- Technical documentation and data sheets on request
- Coordination of deliveries for planned shutdowns
Frequently asked questions
What is a critical rotating machine?
It is a machine whose unplanned shutdown stops a process or a production unit and whose replacement cannot be brought in quickly: a steam or gas turbine, a generator, a process compressor, a high-speed pump. Such machines are fitted with dedicated governing, redundant protection and continuous monitoring of vibration and temperature. The level of these systems is set according to the consequences of a failure, not the power of the machine. The classification is usually made by the plant operator, in the risk analysis.
Can I replace a governor, relay or sensor myself with a different type of equipment?
Sometimes yes, but compatibility must be checked in detail: input and output signals, supply voltage, communication protocol, mounting dimensions and the functions taken over from the old system. For equipment that forms part of a protection chain, changing one component can alter response times or thresholds. We therefore recommend that you send us the code from the nameplate and the diagram, so that we can check the equivalents together before ordering. In the quotation we state the exact code of each item, so that you can verify the match with the plant documentation. For protection chains, also ask for confirmation that the settings and thresholds can be reproduced on the new equipment.
What information should I send for a quotation?
Send the code from the existing equipment, a photograph of the nameplate, the type and power of the machine, the speed, the working environment and, if applicable, the hazardous-area (explosive atmosphere) classification. For new systems the process diagram, the applicable specification, for example API 617 or API 670, and the communication protocol required by the control system are useful. With these data we can identify the correct item and reply with a quotation giving code, quantity and estimated lead time. If the machine is old, the wiring diagram helps too, because it shows the connected signals.
How long does delivery take, and what does the lead time depend on?
The lead time is 24–72 h when the item is available locally or at the supplier. For equipment brought in to order, the lead time is usually 1–4 weeks. Depending on the brand and the specifications it may take longer, especially for complete systems, special configurations or old parts that are no longer in current production. If the machine has a planned shutdown, tell us the date, and we will work out together which items must be ordered first and which can arrive later. For parts no longer in current production, the lead time is confirmed separately in the quotation, after the item or a replacement has been identified.
Do you supply equipment for older machines where the documentation is missing?
Yes, provided the existing equipment can be identified. Many old governors, protection relays and vibration systems were produced in large series, and the codes on the nameplate allow us to look for the original part or its successor. When no identical item exists, we check the alternative together with you, paying attention to interfaces and to the functions taken over. Photographs of the equipment and of the wiring help a great deal with this check. The machine documentation, even if incomplete, supplements the nameplate information and reduces the number of questions.
Do you supply for public procurement, through SEAP or SICAP?
Yes. For public procurement we send the quotation with the name, code and quantity of each item, as well as the estimated delivery time, in a format that is easy to enter in the award documentation. If the procedure requires data sheets or declarations of conformity for certain items, we request them on demand and attach them to the quotation. For large lots or complete systems, a parts list sent in good time allows us to give a realistic lead time. This avoids situations in which an item delivered correctly to specification still does not fit the installation because of an interface detail.
Request a quotation
Send the codes, the nameplate photo or your parts list; we reply in English with availability and the lead time written in the quotation.
Request a quoteUpdated: 2026-11-12