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  • Users: ajz
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  1. ajz

    Challenging Grounding Situation for Temporary Power Plan -- Could use advice.

    Hello all, Let me preface by stating that I am not an electrical engineer, but have enough knowledge to get myself into trouble... I am assisting with preliminary design for a temporary power plan. Background We are planning to install a 50 KVA 480-240/120 1-phase transformer about 150 ft...
  2. ajz

    Looking to increase RO (reverse osmosis) output. Will these system modifications work?

    Hello, Hoping to find someone with a background or experience with RO systems to provide some input. In brief, we have a RO system that we run in year round at 25% duty cycle. It filters municipal drinking water to a water quality suitable for injection into a gas turbine. Our operations...
  3. ajz

    What kind of corrosion does this look like? (Stainless steel bolt in chlorinated water)

    Hey there, We have a gate valve submerged in chlorinated water (5-10 ppm hypochlorite); about 20 years old. Operators found the valve hand wheel to not be actuating the physical gate. Investigation (which required a diving crew to access the submerged valve) showed that the bolts which mate the...
  4. ajz

    Spec'ing Check Valves for Chemical Injection - Pumps higher in elevation than injection point

    Hello, First time poster -- hopefully I'm posting in the right place and following forum rules. Please let me know otherwise. I was tasked with spec'ing check valves for a boiler chemical injection system. My conceptual understanding of the fluid properties is a bit rusty, so I'd appreciate...

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