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Cast Iron Diaphram Pump

Discussion in 'Ice Management' started by William Brett, Feb 6, 2012.

  1. William Brett

    William Brett Member
    Messages: 57

    Ok so here is the score have this year picked up my first big contract and decided to go primarily liquid, now being in the UK this is easier said than done because no one does liquid so have custom built every thing, will get picks on adventually when I get a min. Have currently got it running on 2 electric pumps which is fine when I havent go to put it down very heavy but when it needs to go down heavy it is slow going so been looking at pumps, my machine has a PTO so am thinking of running a pump off of that, have been offered a Hardi Sprayer Pump which has an output of 110l/min which should be plenty. The pump is a diaphragm pump with polyurephan diaphragm etc which I understand is good, my only concern is that the crank caseing etc is cast Iron.

    How much of an issue is this?
    I currently leave the brine in the system from day today.
    How long is the pump likely to last?


  2. leon

    leon Senior Member
    Messages: 872

    Hello Mr. Brett.

    Ideally the diaphram material should be neoprene
    in construction but you have you what you are given.

    The diaphram pump does not have any relief valving
    built into the system normally unless it is added.

    If you use the pump the issue is the Cast iron as it will
    of course rust and corrode as it is porous..

    Ideally you would want to fo the following-

    1. install shut off valve before the pump inlet
    a. install a T with and two ball valves and cam lock couplings
    to attach the suction hose for the intake side of the pump

    2. install a second T a second shut of valve and third bypass valve
    and couplings after the pump discharge to flush the pump chamber
    with hot water.

    The first valve is used in connection with a separate suction line
    attached to the valve to flush the pump with hot water.

    The second valve can be used to connect a second hose
    to discharge the flushed salt water out of the pump chamber.

    The big worry is whether this pump can be run dry without damaging
    the polyurethane diaphram most of them cannot if it is a single diaphram pump

    You will need any more than 10 gallons of hot water to flush the pump
    back into the filler port of the tank with a helper on the tractor to operate
    the Power Take Off for you.