Below is an in depth description of how important it is to maintain a healthy EHC system and the benefits of allowing Hydra-Lube perform an EHC system flush using a unique customized procedure to fit your needs
To get started let’s talk about why you must be concerned about the condition of your system and what could happen if you have neglected the care and maintenance of the system. I would also like to discuss contamination and what to look for, along with troubleshooting tips on how to locate and isolate the source. This article will have questions and answers on the hazards associated with a poorly maintained system along with solutions to eliminate then. These tips and information are based of the years of experience designing, upgrading, and flushing a wide range of different EHC system controls on both steam and combustion turbine such as GE, Westinghouse, Toshiba, Siemens, Allis Chalmers, Fajitsu, Mitsubishi and Brown Bavarians
Questions and answers
- Why is it so important to know the cleanliness of your operating fluid EHC system?
- The time and severity of an event of which a component may fail is practically unpredictable. An event like this could possibly be catastrophic causing irreversible damage to the turbine forcing the plant into a very costly forced outage. Even worse someone could be injured or killed from a piece of equipment that failed to function correctly. So without the ability to predict such an event it is important to know the condition of your system so that at the least you have the chance to possibly prevent someone from being injured or worse.
- How bad is it?
- Once it’s confirmed your system is contaminated and is not running at its optimum potential it is then classified as an unhealthy system. You will then need to determine the severity of the conditions and time frame you have to bring it back to a healthy state before the chance of it causing a forced outage or catastrophic failure.
- What can I do?
- Hydra-Lube and our qualified staff specialize in oil filtration. Allow us to assist you in the evaluation of your situation to help determine whether not a complete system flush is needed or if a small portable filtration system can be used without the system being taken off line and out of service.
Facts about oil contamination
- Identifying the different types of contamination and the effects they may have
A few ways that water may be introduced into your system
Wet air blanket
- Cross contamination
Oil that is not compatible with operating fluid or its additives being introduced into the system by
Adding the wrong make up fluid
Turbines that are designed in a way that if a leak was to happen inside the front standard around the lube oil interface valve the oils could then mix.
These Particles that have entered the system maybe the easiest to remove but have the potential to cause the most damage and they may include
Dust, sand or dirty
Metals shaving or buckshot from the fabrication and installation process
Also metals from excessive wear of on parts and other moving components
Results and side effects of your operating fluid becoming contaminated
- Some of the effects to much of water
- Creates Surface corrosion
- Changes viscosity
- Alters Lubricity
- Causes Hydrolysis
- hydrodynamic-film thickness
- Varnish. The time and amount of which it accumulates may differ depending on the type of fluid being used, what type of contaminate has been introduced and how it will react. Below are some of the affects it may have to an EHC system
- Valves sticking
- Reliability of components
- Reduced or restricted flow
- Increases thermal degradation of the oil by insulating heat in areas that components have become silted with varnish
- Gel and abrasive Gels become a carrier for abrasive particles and cause
- Rapid abrasion wearing of component
- Plugged filters
- Blockage of servo strainer and orifices