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  1. quark

    Printer types in aseptic environment?

    You should keep your printers outside aseptic areas. Go for a network printer rather
  2. quark

    FDA compliance

    You need to have food grade certificate as a minimum requirement. If you are in to liquids, the current practice is to get leachable and extractible certificates, as well.
  3. quark

    AHU air flow filter

    Filters can take much higher velocities. 500 fpm is a spec for face velocity across coil to avoid condensate carry over and this applies to filters automatically as AHU cross section is same. G4 is pretty basic filter, so just check the CA and depth.
  4. quark

    Temperature sensor for measuring flow consumption?

    Yes, not for water but compressed air as you need density correction. Coriolis mass flow meters don't need temperature compensation.
  5. quark

    Power/Energy calc

    1HP per TR is too tight unless you are running a screw or centrifugal at full load. Evaporative coolers can be used with biocide dosing. Combination of direct indirect evaporative cooling is an option but not much cooling if the ambient is humid. Is this for process or space?
  6. quark

    chlorine dioxide as disinfectant

    ClO2 is supposed to be powerful disinfectant than NaOCl. However, both seem to be ineffective against persistent pathogens. If you got over the problem, it is good. We finally went ahead with heating of water to eliminate pathogens.
  7. quark

    Non Standard Part Load Value for Chiller

    I am not sure about the standard you mentioned but chiller manufacturers can provide you part load values at constant entering water temperature or different temperatures at part loads. These are mostly simulated values but good.
  8. quark

    Psychrometric Chart problem

    I am with GT-EGR on this one. Cooling down to 7C to offset bypass indicates the bypass percentage as 15 which is usually high (mixed condition is 17C so, coil bypass air at 17C should bring the cooled air at 7C to 10C). If the SHR line runs in a nonintersecting way to the saturation curve...
  9. quark

    IBR for Steam Tracing

    Not by rule. Depends on the Inspector. It is better to get their approval in initial stages. I see good talent nowadays.
  10. quark

    Measuring quantity in a container

    A simple way is to mark the internals as btrueblood suggested and then providing circumferential slide rule to check the calorie content by food item. This won't be appealing to premium segment, however. Why can't you go with a mobile phone type camera in the lid (the plastic one) and connect...
  11. quark

    Steam trap technical specifications

    If you go with thermostatic traps, they just don't discharge condensate at saturated conditions. You can have 3C or 5C sub cooling, which adds a bit value to your process heating, if the condensate flow rate is high. MOC of the body, float (or disc or bucket or capsule) and levers etc.
  12. quark

    Steam trap technical specifications

    Most important is the discharge capacity, if you don't know the size, already
  13. quark

    Steam trap technical specifications

    Type End Connections Pressure Rating Degree of sub cooling (if any) MOC of components Working Pressure Lift after the trap
  14. quark

    Measuring quantity in a container

    So, you want to manufacture lunch boxes with calorie content showing up once filled, for lazy, rich and health conscious guys. Good luck to you. I saw some super inventions by one of my previous companies, for commercial purposes, so I don't want to disappoint you. As IRStuff already mentioned...
  15. quark

    Measuring quantity in a container

    OK, let me hit this straight. Your requirements are unique and the methods you are considering are neither standard nor specific ones. They are beyond that. So far, the replies you got are with standard courtesy this forum maintains. Without understanding your exact process and what you want to...
  16. quark

    IBR for Steam Tracing

    What is the reason for high pressure steam tracing? Most of the applications of process heating or tracing, we have, usually require not more than 3.5 barg. I fully agree with DS.
  17. quark

    Pump change over and non return valves

    If the system is not pressurized, hot water can flash. That may be the reason why you are first running one pump at full speed before stopping the other one.
  18. quark

    Pump change over and non return valves

    If you could ramp up pump2 at the same rate of ramp down of pump1, the problem might not be severe, but this is not an option for you. Non-slam check valves help the situation as they start getting closed when the flow start reducing rather than against reverse flow. The question still remains...
  19. quark

    Pump change over and non return valves

    Have you tried ramping up of Pump2 at a slower rate?
  20. quark

    Derivation of air flow constant 4005

    The density should be of air as this is standard Bernoulli's Equation. However, you can't measure dP in terms of air column for practical reasons. So, liquid based manometers are used in the past to check dP and get volumetric flowrates from that. That is the reason dP is always to be kept in...

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