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  • Users: KenRad
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  1. KenRad

    Identifying a Hose Bibb Manufacturer

    I have a hose bibb with a stripped out packing nut. Pipe connection is PEX. To replace the whole valve, I would need to open up the wall. But if I can find a new valve, I can just replace the stem/disc assembly. Can anyone tell me what manufacturer uses this symbol?
  2. KenRad

    Electrical Receptacle for Oily Environment

    On a recent visit of an OSHA inspector to one of our machine shops, a comment was made that our standard 120V receptacles are not suitable for an oily environment. The shop has a central mist collector system that does a decent job of keeping mist from escaping the machines, but for a variety...
  3. KenRad

    Cleanouts in an old storm drain pipe

    I'm looking for either an old plumbing engineer, or someone who is familiar with underground piping practices from the early 1970's. Our building has a first floor office that was built in 1971. Under the 4" slab, there is an underground 12" RCCP storm drain pipe running the length of the...
  4. KenRad

    Operation of Carbon Adsorption Equipment for Ammonia Exhaust

    I have an exhaust treatment system where I'm using phosphoric acid impregnated carbon to adsorb ammonia in an air stream. The system serves some test equipment, which only runs a few hours per day. My preference for operation of this system would be to leave the exahust fan running all of the...
  5. KenRad

    Drying a Piping System Following a Hydro

    I have a tubing network made up of various sizes of stainless steel Swagelok, to be used for a 5000 psig nitrogen (gas) system. The system owner is concerned about removing all water following a hydrostatic test. There are plenty of vent/drain points for removing most of the water. Beyond...
  6. KenRad

    Liquid Nitrogen Piping

    I have no experience with cryogenic piping, but need to quickly design a 50' liquid N2 run that will feed an environmental chamber for low temperature product testing. The line will be valved off for weeks at a time when this low temperature test is not taking place. My question is this - what...
  7. KenRad

    Hazardous Location Sump Pump

    I'm looking for a sump pump for a sink in a hazardous (Class 1 Div 1) location. Several manufacturers make submersible pumps that are rated for this, but the ones I've seen are too large for this application. Anyone see any small ones? ---KenRad
  8. KenRad

    Water Droplets in Compressed Air

    I have a production room that uses compressed air for blowoff of parts. Since this is a critical operation, I've installed a membrane dryer, and 1 micron filtration. The air is dried and filtered, then regulated from 100 psig down to about 30 psig, with the resulting pressure dewpoint around...
  9. KenRad

    Steel Corrosion due to Atmospheric Air

    I'm trying to get some good information regarding room design to avoid steel corrosion. Over the years, I've heard people say that maintaining a room's relative humidity below 55% or 60% will minimize the corrosive effects of water vapor in the atmosphere. What I'd like to know is whether it's...
  10. KenRad

    Steel Corrosion due to Atmospheric Moisture

    I'm an HVAC professional, trying to get some good information regarding room design to avoid steel corrosion. Over the years, I've heard people say that maintaining a room's relative humidity below 55% or 60% will minimize the corrosive effects of water vapor in the atmosphere. What I'd like to...
  11. KenRad

    Pump Selection for Petroleum Distillate

    I am trying to select a pump for a calibration fluid distribution system. The fluid is a petroleum distillate, used to test automotive fuel system components. Required volume and pressure are relatively low, maybe 10 GPM and 40 psig. Aside from material compatibility, what are the...
  12. KenRad

    Water Mist in Compressed Air Blowgun

    I'm stumped about a problem that my production folks are having with my compressed air. This particular production line uses compressed air blowguns to blowoff glass lenses. When they then look at the lens through a magnifying glass, they see small water droplets randomly spread over the lens...
  13. KenRad

    Sprinkler Head in Double Wall Stack

    I have an oven that will serve an automated powder coating process. I'm being asked by my insurance company to put sprinkler heads in the exhaust stacks (which I think is absurd). The stacks will be 18" diameter double wall (B-vent). Does anyone know of an access door designed for B-vent...
  14. KenRad

    Cleanroom Design

    I've been given the task of expanding an existing class 10,000 cleanroom. The duct design is something I've not come across before, and was wondering if anyone is familiar with it. The two air handlers serving this room are roof-mounted. The supply air discharges through openings in the...
  15. KenRad

    Diesel Engine Dyno Exhaust

    Can anyone tell me what codes govern the venting of a diesel engine dynomometer? The engines being tested will be directly connected (no dilution air) to this exhaust stack. Temperatures can be as high as 900C. The vent will have to go through a block wall to the outside, and up the side of...
  16. KenRad

    Enclosure for Transformer

    I have a 500 VA transformer (120 volt primary/48 volt secondary) that has exposed connections, so I need to put it in some kind of electrical enclosure. Is there a way that I can quickly determine what size enclosure I would need to keep this transformer from overheating? Or, does anyone make...
  17. KenRad

    Once-Through Cooling

    I know that at one time, one of the International Codes contained a prohibition on using potable water for once-through cooling of equipment. I recently told someone that I needed to connect their equipment to the building cooling system because once-through cooling was a violation of code (and...
  18. KenRad

    Loading of Carbon Steel Angle

    I'm trying to find load capacity information for structural steel angle. Been searching the web for 20 minutes, and can't seem to find anything. Can someone point me in the right direction? ---KenRad
  19. KenRad

    Using Air Compressor for Nitrogen Service

    I have an application for compressing a mixture of 6% oxygen and 94% nitrogen to about 45 psig. The mixture is being pulled from a process that has nitrogen inerting for explosive hazard reasons. The gas will be clean, since it will pass through a dust collector with fairly high efficiency bag...
  20. KenRad

    Sound Dampening for Packaged Rooftop Units

    Does anyone have a spec for sound dampening material inside of a roof curb for a packaged unit? I have a 30-ton and 40-ton unit that I'm installing over an office. The roof is a membrane over corrugated metal. I want to put something on top of the corrugated metal decking inside the curb, to...

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