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  • Users: steamdog
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  1. steamdog

    Sanitary Stainless P/T Relief Valve

    Is there such a thing as a sanitary stainless pressure & temperature relief valve? I have a customer who is circulating hot DI water and asked for this. I have seen commercial sanitary pressure relief valves but not temperature (normally used in domestic hot water heaters).
  2. steamdog

    Vent Hole in HTHW Check Valve

    Just curious about a specification I just saw. There is a control valve for a high temperature hot water heat exchanger (400 deg f at 400 psi design). They specified a vent hole in a check valve to be installed on the outlet side of the heat exchanger. Anyone know why?
  3. steamdog

    AWWA Butterfly 2.5"

    I searched site but could not find answer. I am building a skid that has a few 2.5" butterfly valves for pump isolation. The general specification mentions AWWA valves, but I look to see that AWWA rated butterfly valves are only 3" and above. Any idea on what to do below 3"?
  4. steamdog

    Hot Alignment

    I have been searching for information about the temperature at which an additional hot alignment of base mounted pumps is required. Most of the pumps I work with are in the HVAC industry where the temperature is 180-190 deg F maximum, and we don't normally hot align the pumps. I recently was...
  5. steamdog

    Modbus RTU to BACnet

    I am a controls novice. My PLC controller has Modbus RTU output and I need to connect to a BACnet building management system. Some controls guys I am talking to say these translators are difficult to configure. Does anyone have some hands-on experience with one that you can recommend for ease...
  6. steamdog

    PHE Plate Thickness

    Is there a standard for plate thickness on a P&F heat exchanger? I have one rated at 350 psig design pressure that has 0.5mm 304SS plates. I have heard that for this pressure the plates should be a minimum of 0.6mm, but could find no verification.
  7. steamdog

    Plate & Frame ASME Stamp

    I supplied a P&F Heat Exchanger that had to be ASME stamped. This exchanger is rated at 350 psig. The unit was supplied with an 'M' stamp (miniature). The total internal volume is about 5 cubic feet. The size limit for an 'M' stamp is 3 cubic feet at 350 psig. The manufacturer stated that...
  8. steamdog

    Switch Controlling Solenoid

    I have a very basic question. A system with two 120VAC pressure switches needs to activate a 3-way air solenoid that would open the valve if either switch activates. Can I just splice these wires together and attach them to the solenoid?

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