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  1. Airsmybag

    roughen concrete surface of garage ramps for traction

    Wheel type scarifiers can have the cutters set up to make grooves of any desires spacing. I would use cutters with carbide buttons. Operator skill is important. A chalk line on the concrete and a "front site" on the machine are a good idea to maintain parallel passes. Grooves on a highway are...
  2. Airsmybag

    Waterjet Cleaning for Coating Removal

    For work hardening or stress alteration to occur, the molecular structure at the surface of the steel would need to be disturbed as by abrasive or shot impact. At 40,000 PSI (nozzle presure) water will remove coatings and most rust, but will not effect surface structure. In abrasive blasting...
  3. Airsmybag

    Sandblasting Valves

    If you are referring to a metering valve, thare are a few good ones on the market. Assuming that you are referring to a pressurized blast pot, there are two primary systems in use. 1) the pot is equipped with an exhaust valve and an inlet valve. Commercial units have a mushroom valve that...
  4. Airsmybag

    Query: Why is surface preparation (blasting) not allowed during night hours

    If you are talking about blasting steel, such as storage tanks or structures, the surface cools at night after sunset. As the sun rises, the air warms faster than the steel. The dew point of the air is higher than the temperature of the surfaceand the steel becomes a condensing surface for...
  5. Airsmybag

    Hardware Recommendation - Small Portable Air Compressor

    I notice a lack of response to your post. In case you have not solved your problem, I will respond. For 40 CFM @ 80 PSI, a 10 hp reciprocating ompressor would be adequate. I would use a 25 HP gas engine or 18 - 20 HP diesel. There are a few companies which su[pply such packages. You did not...
  6. Airsmybag

    motor burnout from pressure washing

    George Great idea. Megging beforehand would most likely told me to avoid cleaning. Megging before starting to assure no moisture/insulation issues would have been prudent. Yes, we lock out. That is why I am still alive at 76! Megging at disconnect would not work since motor is isolated...
  7. Airsmybag

    motor burnout from pressure washing

    When the smoke clears (no pun intended) Wayne440 has it right. Winning the battle is less important than winning the war. Protecting the relationship with the customer is more important than being right or saving a few bucks. Electricpete's comment about the NEMA spec is as heart warming as...
  8. Airsmybag

    motor burnout from pressure washing

    While servicing industrial air compressors it is frequently necessary to use a pressure washer with cold water to clean oil coolers and aftercoolers. Some water can enter ODP motors. We would normally use compressed air to "blow dry" visible water from electrical components before rrestoring...
  9. Airsmybag

    Sizing for Air Reciver for Air Compressor

    Selection or correct sizing of a receiver is at least as important as sizing the air compressor. Theoretically, if your load is constant, you do not need a receiver. On the other end of the spectrum, to usa a bizarre example, lets say you had a need for 1000 CFM for a short burst, every few...
  10. Airsmybag

    CO2 Compressor System - "Expert" Second Guessing Design

    David I stand corrected... or guided. More accurately stated, a conventional refrigerated air dryer will not work at 7 PSI They are normally designed to operate at 100 PSI. A specially designed chiller would be possible. Pipe or cv would need to be in the 2" range, typically used on a 500...
  11. Airsmybag

    CO2 Compressor System - "Expert" Second Guessing Design

    I tripped over this forum by accident while doing some recent research. I am the unnamed who designed this system. I respect most of the posts to this string and the experience they represent. In case this string is going to continue, I would like to throw in a few points. 1. The original...

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