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    Duraline DI Water Lab Faucets (Deck Mount): PVC, Natural Polypro, and High Purity PVDF
    Fields of Application: Distilled, Deionized, RO, Ultra Filtrated Water, & Chemical Dispensing

    The industry has long awaited a DI Water Lab Faucet that would provide the durability and strength of a metal faucet, without the contamination and corrosion that metal introduces into the process environment.

    • Max flow of 2.5 GPM @ 80 PSI, Full Open
    • Heavy wall, injection molded stanchion prevents breakage
    • Ruggedly designed, point of use control valve for constant on/off use
    • Removable Serrated Barb Tip (Leaves 1/4" Fem NPT Outlet), attach accessory of your choice
    • "Duraline" zero dead leg control valve offer easy open/close operation (Hard stop), 120 deg full flow to closed
    • No elastomers, metals, or lubricants used in construction
    • All components designed for high traffic, hard use environments
    • FDA, USDA, and USP standards are either met and/or exceeded
    • Ultra smooth internal flow path
    • PTFE sealed, encapsulated PTFE shut off seal for unlimited life
    • Black handle with white marker and black "DI" text per SEFA code recommended practice No. 7 for DI Water Applications
    • Duraline control valve is completely renewable by replacing the internal cartridge, per SEFA 7-2010-8.2a
    • Positive stop at off position
    • 3/8" Fem NPT inlet supply connection, 3/8" O.D. tube x 3/8" MNPT compression tube fitting inlcluded

     Data Sheet    Installation Instructions & Parts List  Sales Drawing  

    PLEASE CLICK AN ITEM #  BELOW TO VIEW ADDITIONAL SPECIFICATIONS & DOWNLOADS

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    Duraline DI Water Lab Faucets (Wall Mount): PVC, Natural Polypro, and High Purity PVDF
    Fields of Application: Distilled, Deionized, RO, Ultra Filtrated Water, Chemical Dispensing. 

    The industry has long awaited a DI Water Lab Faucet that would provide the durability and strength of a metal faucet, without the contamination and corrosion that metal introduces into the process environment. That was the goal and the achievement of DURALINE. Marquest Scientific's Duraline Faucets offer the ultimate in durability for commercial applications, featuring a full array of heavy-duty faucets that are built to withstand constant use -- and the occasional misuse -- found in commercial applications. Duraline provides the ultimate combination of updated styling and heavy-duty construction. Duraline models can stand up to the extreme wear and tear found in most commercial applications, plus they are backed by a five year warranty against material or manufacturing defects. -- so our customers know they are getting the best product on the market, guaranteed. All Duraline faucets feature a heavy duty, injection molded stanchion, no longer an extruded tube and the most durable control valve available. These control valves prevent handle wobble while ensuring a positive closed position and feature all PTFE sealing. An encapsulated PTFE shut off seal provides an ideal construction geometry for keeping the PTFE in compression for constant on/off operation.

    • Max flow of 2.5 GPM @ 80 PSI, Full Open
    • Heavy wall, injection molded stanchion prevents breakage
    • Ruggedly designed, point of use control valve for constant on/off use
    • Removable Serrated Barb Tip (Leaves 1/4" Fem NPT Outlet), attach accessory of your choice
    • "Duraline" zero dead leg control valve offer easy open/close operation (Hard stop), 120 deg full flow to closed
    • No elastomers, metals, or lubricants used in construction
    • All components designed for high traffic, hard use environments
    • FDA, USDA, and USP standards are either met and/or exceeded
    • Ultra smooth internal flow path
    • PTFE sealed, encapsulated PTFE shut off seal for unlimited life
    • Black handle with white marker and black "DI" text per SEFA code recommended practice No. 7 for DI Water Applications
    • Duraline control valve is completely renewable by replacing the internal cartridge, per SEFA 7-2010-8.2a
    • Positive stop at off position
    • 3/8" Fem NPT inlet supply connection, 3/8" O.D. tube x 3/8" MNPT compression tube fitting inlcluded

     Data Sheet    Installation Instructions & Parts List    Sales Drawing

    PLEASE CLICK AN ITEM #  BELOW TO VIEW ADDITIONAL SPECIFICATIONS & DOWNLOADS

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    Typical Installation & Scope of a Marquest Duraline Recirculating Laboratory Faucet 
    Recirculating Lab Faucet System Design Notes & Specification 
    Duraline Recirculating Lab Faucets 
     
    The Marquest Scientific Recirculating Lab Faucet is designed primarily for use with a recirculating system which incorporates a non-pressurized storage tank or reservoir. The non-pressurized tank provides the pressure drop for the recirculating flow to continue and return via the recirculating tube. Since the water is returned to the tank, it is not actually consumed. 

    The objective is to provide a constant flow of DI Water when the point-of-use dispense is not being utilized. This will prevent stagnation of the water and subsequent development of bacterial growth. Continuous flow is one method of combating bacterial growth in UPW systems. 

    Ideally, the flow rate of the recirculating flow stream is 4.5 feet per second or greater. When utilizing the .125" ID recirculating tube, a flow rate of .2 GPM through the tube will generate a flow velocity of 5.2 feet per second. 

    Maintaining this flow rate will prevent bacteria and other biomass from adhering to internal surfaces. Lower flow rates are still beneficial over a stagnate system. 
    When piping the recirculating lab faucet in series, a common return line may be used to accept each individual recirculating tube. A small pressure drop down stream of each faucet may be necessary to assure a positive flow through the recirculating system and provide adequate pressure for the main water dispensing.


    1.0 Recirculating Lab Faucet
    1. Recirculating Laboratory Faucet shall be constructed of polyvinylidene flouride (PVDF) or natural polypropylene (PPN) and designed to provide a continual fluid flow to the point of use to eliminate the inherent dead leg. Faucet shall be Marquest Scientific model DL-DDR-2 (Natural Polypropylene) or DL-DDR-3 (Natural PVDF).
    2. Faucet to be manufactured with Duraline Control Valve for on/off flow operation and precise control, featuring an encapsulated PTFE shut off seal for constant on/off use and a compression PTFE stem seal. A renewable cartridge shall be available for the valve which provides an easy method of replacing all valve moving parts while the faucet is in its installed position.
    3. Recirculating laboratory faucets when installed in a series require a small pressure drop to be created between the main loop supply connection and the recirculating return line connection. This may be accomplished with a common, diverter type tee fitting, a valve or an orifice plate.
    4. Pressure rating shall be 120 PSI.
    2.0 Installation
    1. System components for installation shall be of like materials of construction. Joining techniques shall confirm to best practice given the application and specifications.

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