Marquest Scientific DURALINE™ Deionized Water Lab Faucets (Available in PVC, Natural Polypro, & PVDF) The finest non-metallic lab faucet in the industry for deionized water and 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. /Asset/DL_Cat_Image.jpg
Series LG Lab Faucets: Reliable Performance for High-Purity Water Applications
The Series LG Lab Faucets, available in PVC, Natural Polypro, and High Purity PVDF materials, are designed to deliver reliable performance in demanding laboratory environments. These faucets are suitable for a wide range of applications, including distilled, deionized, pharma grade, RO, ultra-filtered water, chemical dispensing, and reagent-grade laboratory water (Type I, Type II, Type III, and USP Type Water).
Key features of the Series LG Lab Faucets include:
Maximum flow rate of 2.5 GPM @ 80 PSI, fully open
Removable serrated barb tip for attaching accessories, leaving a 1/4" Female NPT outlet
"Duraline" zero dead leg control valve for easy open/close operation and 120-degree full flow to closed
No elastomers, metals, or lubricants used in construction, ensuring compatibility with high-purity water
Components designed for high traffic, heavy use environments
Compliance with FDA, USDA, and USP standards
Ultra-smooth internal flow path and heavy wall construction for durability
PTFE sealed, encapsulated PTFE shut off seal for extended life
Black handle with white marker and black "DI" text per SEFA code recommended practice No. 7 for DI Water Applications
Renewable Duraline control valve by replacing the internal cartridge, DL-RC180-PVD, per SEFA 7-2010-8.2a
Positive stop at off position
3/8" Female NPT inlet supply connection, with included 3/8" O.D. tube x 3/8" MNPT compression tube fitting
Choose the Series LG Lab Faucets for your laboratory and experience the benefits of a high-quality, reliable water dispensing solution. Click on the item numbers below to view additional specifications and downloads, including data sheets and parts lists
The Marquest Lab Faucet with Water Quality Light is specifically engineered for handling distilled, deionized, reverse osmosis, and ultra-filtered water types, suitable for Type I, II, and III water. This faucet can safely operate at pressures up to 150 PSI. It features a Water Quality Light designed to monitor water purity across specific resistivity thresholds, including 10K, 50K, 200K, 500K, and 1 Meg ohm/cm². The light displays green when water purity is above these thresholds and switches to red to indicate when purity falls below them.
Powered by a wall transformer that converts 120 VAC to 9VDC, this faucet is designed for safety and durability, complemented by a 9-foot cord. It supports a maximum flow rate of 2.5 GPM at 80 PSI and includes a removable serrated barb tip to easily attach various accessories. Constructed to withstand rigorous use, this faucet complies with the material and safety standards set by the FDA, USDA, and USP. It features a 3/8" Fem NPT inlet and a 3/8" O.D. tube x 3/8" MNPT compression fitting, ensuring a reliable and precise water control solution for engineers, technical users, and distributor salespeople.
Series LG Lab Faucets: PVC, Natural Polypro, and High Purity PVDF Fields of Application: Distilled, Deionized, RO, Ultra Filtrated Water, Chemical Dispensing.
Working Pressure: Maximum 150 psi at 70 Degrees Farenheit
Materials listed under NSF Standard 14/61 for both potable water and DWV applications and FDA approved FDA, USDA, and USP standards are either met and/or exceeded.
Beautifully finished to enhance all installations
All injection molded, rugged design and construction
Standard 3/8" female NPT inlet connection, other connections available
Outlet barb fitting connects to different size tubing
Union Ball Valve provides adjustable orientation of handle and gooseneck, higher flow rates and 1/4 turn on/off.
(9)Series LG Lab Faucets: PVC, Natural Polypro, and High Purity PVDF Fields of Application: Distilled, Deionized, RO, Ultra Filtrated Water, Chemical Dispensing.
Working Pressure: Maximum 150 psi at 70 Degrees Farenheit
PVC Material listed under NSF Standard 14/61 for both potable water and DWV applications and FDA approved FDA, USDA, and USP standards are either met and/or exceeded.
Beautifully finished to enhance all installations
All injection molded, rugged design and construction
Standard 3/8" female NPT inlet connection
Outlet barb fitting connects to different size tubing
Union Ball Valve offers adjustable orientation of valve handle and gooseneck, higher flow rates, and 1/4 turn on/off
Series LG Hot/Cold Lab Faucets:PVC, Natural Polypro, and High Purity PVDF Fields of Application: Potable, Distilled, Deionized, RO, Ultra Filtrated Water, Chemical Dispensing. Type I II III Water
Max flow of 2.5 GPM @ 80 PSI
"Duraline" zero dead leg hot/cold control valves offer easy open/close operation, 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
Unique heavy wall construction
PTFE sealed, encapsulated PTFE shut off seal for unlimited life
Black handles with red (hot) and blue (cold) markers and white "HW" and "CW" text per plumbing code specifications
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 hot and cold inlet supply connections, 3/8" O.D. tube compression x male fittings inlcluded
Series LG Recirculating Lab Faucets:Natural Polypropylene and High Purity PVDF Fields of Application: Type I, II Deionized, RO, Ultra Filtrated Water.
Marquest Scientific has been manufacturing faucets for the transportation and dispensing of high purity liquids for over 25 years. Recirculation is a feature developed to eliminate any bacterial growth or other biological impurities due to stagnation. This is accomplished by providing a method to allow continuous motion of the liquid during all phases of operation.
Max flow of 2.5 GPM @ 80 PSI
Selection of Virgin Natural Polypro or PVDF wetted fluid paths with PTFE Seals
No elastomers, metals, or lubricants used in construction
Zero dead leg control valve activation at point of use
Simplified installation of recirculation module
All components designed for extreme industrial environments
FDA, USDA, and USP standards are either met and/or exceeded
Ultra smooth internal flow path
Unique heavy wall construction
Duraline control valve offers easy open / close valve, 120 deg rotation full flow to closed
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
Exceptional low torque on/off operation
PLEASE CLICK ITEM # TO VIEW ADDITIONAL SPECIFICATIONS & DOWNLOADS
Series LG Lab Faucets with Atmospheric Vacuum Breaker: PVC, Natural Polypro, and High Purity PVDF
The Series LG Lab Faucets with Atmospheric Vacuum Breaker are designed for use with high purity lab water systems dispensing Type 2 and 3 deionized water, as well as distilled, pharma grade, RO, and ultra-filtered water. These faucets are available in PVC, Natural Polypro, and High Purity PVDF materials to suit various laboratory applications and requirements.
The integrated atmospheric vacuum breaker prevents back-siphonage within the lab water system, ensuring the purity of the dispensed water. The faucets are designed to provide reliable, long-lasting performance in laboratory environments where high purity water is required.
Key features:
Maximum flow rate of 2.5 GPM @ 80 PSI, fully open
Removable serrated barb tip (leaves 1/4" Female NPT outlet) for attaching accessories
"Duraline" zero dead leg control valve with easy open/close operation, 120-degree full flow to closed
No lubricants or wetted metals used in construction
Components designed for high traffic, heavy use environments
Meets and/or exceeds FDA, USDA, and USP standards
Ultra-smooth internal flow path and heavy wall construction
PTFE sealed control valve with encapsulated PTFE shut off seal for extended life
Black handle with white marker and black "DI" text per SEFA code recommended practice No. 7 for DI Water Applications
Renewable Duraline control valve by replacing the internal cartridge, DL-RC180-PVD, per SEFA 7-2010-8.2a
Positive stop at off position
3/8" Female NPT inlet supply connection, with included 3/8" O.D. tube x 3/8" MNPT compression tube fitting
The Series LG Lab Faucets with Atmospheric Vacuum Breaker are suitable for a wide range of laboratory water applications, including chemical dispensing and reagent-grade water. With their durable construction and high-quality components, these faucets are an excellent choice for laboratories seeking reliable, high-performance water dispensing solutions.
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
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).
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.
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.
Pressure rating shall be 120 PSI.
2.0 Installation
System components for installation shall be of like materials of construction. Joining techniques shall confirm to best practice given the application and specifications.
Replacement Goosenecks for Marquest PVC Lab Faucets
Our Replacement Goosenecks are identical to those originally equipped on Marquest PVC Lab Faucets, ensuring a seamless transition when a replacement is necessary due to wear or impact damage. These components are direct matches to your existing setup, allowing for quick and efficient restoration of your faucet's performance.
Select the exact replacement from our range to immediately address any operational disruptions, ensuring your laboratory activities proceed with consistent efficiency. These goosenecks are provided to support the longevity and reliability of your Marquest PVC Lab Faucets, facilitating uninterrupted lab work.
