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    Ferghus's Avatar
    Ferghus Posts: 97, Reputation: -4
    Junior Member
    		  
    #1

    Dec 16, 2008, 06:52 PM
    Tetco heat pump and direct acting modulating valve
    I have a Tetco AC50 "HE" with a C36 "WC". My unit differs from the AC50 shown in their online manuals in that it has three refrigerant ports. A "high liquid", a "high refrigerant pressure, and a "low refrigerant pressure. The "low refrigerant" port is connected to a "modulating valve" that is a Sterlco 56. This valve needs to be replaced but it is not listed any longer on Sterlco's website.

    There is a similar Johnson V46-AC-1C, 3/4" 70-260 psig valve available online from Johnson controls. This seems likely the same valve listed as Tetco's V46-AC valve.

    Does anyone familiar with Tetco know if the Johnson valve will work in place of the Sterlco valve and what it's operating pressure should be set at?

    I have emailed Tetco but have yet to hear back from them.

    Thanks.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 16, 2008, 07:13 PM
    These are adjustable water valves use to regulate pressure.

    http://www.mmcontrol.com/documents/pdfs/sterlco/56.pdf

    They are popular with making illegal booze and ethanol. LOL no kidding!

    There are available her

    Sterlco


    56 Valves - Temperature Control Valves - Steam Control Products - STERLING



    Look at # 56
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