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A variety of valves that can, depending on the product, be used to regulate pressure levels of liquid and gas in flow systems. These valves can be used for making connections between different lengths of tubing and connection points. Liquid and vacuum seals. A plethora of scenarios exist in which these valves can be used, each with a unique purpose and design for maximum safety and efficiency when in use, especially when pressure is of great concern.
Valves and loops, Sulfinert® treated
Supplier: Restek
Sulfinert® treated gas sample loops are ideal for samples containing low concentrations of sulphur and other active compounds.
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Terugslagklep
Supplier: Lenz Laborglas GmbH & CO.KG
DURAN®, borosilicate glass, clear. Prevent pressure loss or backflow. Simple design, cannot be dismantled.
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Inline cartridge check valves, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
Inline cartridge check valves are designed to limit flow in one direction and deliver a low cracking pressure. Ideal placement for these valves would be on the effluent side of the column to prevent post-column derivatisation agents from flowing back and poisoning the column if the HPLC mobile phase pump were to shut down.
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Inline check valves, quick-stop luer, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
The Quick-Stop Luer check valve assembly is specifically designed to provide inline Luer connect/disconnect convenience while avoiding spills. It is made from biocompatible PEEK with gold-plated stainless steel spring.
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Micro-splitter valves, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
Designed to accurately split and control the low flow stream of a single incoming supply.
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Check valves, ASI
Supplier: Restek
Outlet cartridges, sapphire and ruby ball and seat
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Valves for solvent extractors for ASE® 100/200/300 systems
Supplier: Restek
Valves for ASE® 100/200/300 systems.
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Check valve cartridges, OPTI-MAX®
Supplier: OPTIMIZE TECHNOLOGIES
A single OPTI-MAX® cartridge is interchangeable across multiple pump brands and can function in either the inlet or outlet position.
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Back pressure regulators
Supplier: Restek
Backpressure regulators can improve detector performance by preventing bubble formation in the detector flow cell. They also are useful in post-column reaction lines and between detectors and fraction collectors in preparatory work. Regulators are superior to more specific alternative solutions like small bore tubing, in which pressure varies with flow rate.
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Plug valves, Parker Balston® shut-off gas valve
Supplier: Restek
These shut-off plug valves work well in any application which requiring throttling or on/off operations.
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Rotary valves, high pressure
Supplier: OMNIFIT
The high pressure manual rotary valves are made from PTFE with a PCTFE rotor with a bore size of 0,8 mm making them ideal for pressure applications up to 500 psi. They are available in four and five port versions. All ports are 1/4"-28 UNF flat-bottom and will accept any 1/4"-28 UNF male fitting. These valves are mountable using the pre-drilled M3 mounting holes.
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Non return valves, Azlon®
Supplier: SciLabware
Designed for use in vacuum lines and fluid handling systems.
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Precision sampling valves for vials, Mininert®
Supplier: Restek
Mininert® valves are very convenient for repetitive sampling and limit content exposure to the silicon septum. The crimp-top valve for 20 mm ID glassware slides into the neck of the vial.
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Back pressure regulators, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
Back pressure regulator assemblies are designed to create incremental back pressures ranging from 5 to 1000 psi (0,3 to 69 bar). These biocompatible and stainless steel back pressure regulator assemblies are available complete with a replaceable, factory pre-set cartridge (except the 5 and 20 psi (0,3 to 1,4 bar versions).
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Inline check valves, non-metallic ¹/₄-28 and 10-32, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
These biocompatible PEEK and perfluoroelastomer inline check valves are designed for applications where low flow path volume is critical, such as delivery to lab-on-a-chip, single-cell analysis and micro- or nano-LC post-column derivatisation.
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Medium pressure injection valves, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
The 6-port medium pressure injection valves feature easy, external sample loop customisation. Simply clean-cut a piece of tubing that represents the volume of sample you wish to inject, taking into account the port-to-port volume of the valve.
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Check Valve
Supplier: NEUBERT VOLUME GLASSWAERE
Loose closure with variable weight check valve.