Our non-return valves protect tubing and vacuum systems from backflow when pressure falls in the system. Sealing system eliminates backflow, helping to prevent upstream contamination or damage. These valves are compatible with a wide range of systems, all with different specific levels when dealing with the three main pressure values: cracking pressure, maximum pressure, and back pressure created. Durable steel or plastics are used in all designs, with spring loaded, creating a quality product that will remain independent for years with no need for replacement.
Terugslagventielen, met conische in-/uitgang
Supplier: BURKLE
Terugslagventielen met richtingpijl in reliëf of zwart gedrukt. Met conische spuitmondjes. Diverse toepassingen. PP, transparant.
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Micro control valves
Supplier: Trajan Scientific and Medical
Micro control valves provide precision metering and on-off control of gas flows. They are designed specifically for chromatography applications and used at elevated temperatures from high vacuum to medium pressure.
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Avantor® Hichrom PEEKsil™, Back Pressure Regulator
Supplier: Avantor
Avantor® Hichrom, Back pressure regulator, Druk: 5,17 bar
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Non return valves, BOLA
Supplier: Bohlender
These non return valves are made from PTFE, with nuts made from glass fibre reinforced PTFE for connecting tubing or tubes.
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Thermostatic mixing valve for eye showers
Supplier: BROEN-LAB
Thermostatic mixing valve for eye showers designed for delivering tepid water (20 to 25 °C).
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Vacuum check valve and positive connector, Nalgene®
Supplier: Thermo Fisher Scientific
These vacuum check valves with positive connector are designed to prevent back pressure with aspirator-type vacuum pumps.
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Terugslagkleppen
Supplier: KARTELL
Transparant PP. Voorkomen drukverlies en terugstromen. Maximumwerkdruk 2 bar en minimumwerkdruk 0,07 bar bij kamertemperatuur (20 °C).
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Terugslagklep
Supplier: Brand
HDPE, transparent. Prevents backflow. With FKM valve disc not suitable for pressure applications.
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Non-return valves, SP Bel-Art
Supplier: Bel-Art Products, a Part of SP
PP valve, translucent with neoprene valve disk. Stops reverse flow of liquid when pressure is interrupted.
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Non return valve, PP
Supplier: BURKLE
Valve made of PP and POM, seal made of EPDM, springs made of stainless steel 1.4401.
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Mass flow controllers and restrictors
Supplier: Agilent
New style restrictor, 0 - 20 ml/min, red/purple colour
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Drukregelaar
Supplier: VICI JOUR RESEARCH
Deze regelaar wordt geïnstalleerd op de afvoerleiding van de detector en voorkomt de vorming van lucht in de doorstroomcel tijdens het gassen. De regelaar beschikt over een instelbare tegendruk van 0-20,5 bar (300psi) zonder loskoppeling van het systeem. Andere maten zijn verkrijgbaar.
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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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Pressure relief valves, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
Pressure relief valves are ideal for preventing system over-pressurisation. These products protect system components by diverting fluid flow automatically when inline pressure exceeds the set limit.
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Shut-off valves, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
Stop a flow stream quickly with these shut-off valves. The bodies are manufactured from either PEEK or ETFE. Both versions feature a PCTFE rotor, making them highly resistant to chemicals. The blue colorant used in some valve configurations has proven not to leach out with common HPLC solvents.
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Ultra-low volume back pressure regulators (BPR), Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
These ultra-low volume back pressure regulators (BPRs) are developed to minimise swept volume, which is especially important for multi-detector applications.
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Overdruk- en terugslagventiel
Supplier: QVF LABORTECHNIK
Air valve anti-return, cone size 19/26 NS, with sidearm, Borosilicaatglas 3.3
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Check valves for Shimadzu HPLC systems
Supplier: Restek
Replacement parts for Shimadzu HPLC systems.
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Valves for HPLC
Supplier: Restek
These valves have low internal volumes and are rated to 15000 psi. They feature a two-piece stem assembly in which the rotating upper shank is coupled through a ball joint to a static lower stem.
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Inline check valves, standard 1/4-28, Upchurch Scientific®
Supplier: UPCHURCH SCIENTIFIC
These standard inline check valves are made from gold plated stainless steel.
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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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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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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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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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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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Check valves, ASI
Supplier: Restek
Outlet cartridges, sapphire and ruby ball and seat