You searched for: Non Return Valves

Supplier: Avantor

Avantor® Hichrom, Back pressure regulator, Pressure: 5,17 bar

Supplier: Bohlender

These non return valves are made from PTFE, with nuts made from glass fibre reinforced PTFE for connecting tubing or tubes.

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.

Supplier: Brand

HDPE, transparent. Prevents backflow. With FKM valve disc not suitable for pressure applications.

Supplier: KARTELL

PP, translucent. Prevent pressure loss and backflow. Maximum working pressure 2 bar and minimum working pressure  0,07 bar at room temperature (20 °C).

Supplier: Thermo Fisher Scientific

These vacuum check valves with positive connector are designed to prevent back pressure with aspirator-type vacuum pumps.

Supplier: BROEN-LAB

Thermostatic mixing valve for eye showers designed for delivering tepid water (20 to 25 °C).

Supplier: VITLAB

These non return valves are made from HDPE.

Supplier: BURKLE

Translucent PP retaining valves with embossed directional arrow or printed in black. With tapered ends. Various uses.

Supplier: Bel-Art Products, a Part of SP

PP valve, translucent with neoprene valve disk. Stops reverse flow of liquid when pressure is interrupted.

Supplier: BURKLE

Valve made of PP and POM, seal made of EPDM, springs made of stainless steel 1.4401.

Supplier: Restek

Replacement parts for Shimadzu HPLC systems.

Supplier: Restek

Inlet housing

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.

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.

Supplier: QVF LABORTECHNIK

Air valve anti-return, cone size 14/23 NS, with sidearm, Borosilicate glass 3.3

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.

Supplier: SEMADENI

These non return valves are made from PP.

Supplier: Lenz Laborglas GmbH & CO.KG

DURAN®, borosilicate glass, clear. Prevent pressure loss or backflow. Simple design, cannot be dismantled.

Supplier: SciLabware

Designed for use in vacuum lines and fluid handling systems.

Supplier: UPCHURCH SCIENTIFIC

These standard inline check valves are made from gold plated stainless steel.

Supplier: VICI JOUR RESEARCH

This regulator installs on the detector drain line and prevents bubble formation in the flow cell during outgassing. It has an adjustable back pressure from 0 to 20 bar (15 to 300 psi) without disconnecting from the system. Other sizes available.

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.

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.

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.

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.

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).

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.

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.