TEST - Technical Note Library

W and UW valves: operation and cleaning

Precautions and instructions for disassembling, cleaning, and reassembling W and UW type Valco valves.

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4-port internal sample injector

Schematic flow diagram for the 4-port internal fixed-volume sample injector, W and UW valves, all series.

6-port external volume sample injector

Schematic flow diagram for the 6-port external volume sample injector, W and UW valves, all series.

8-port external volume sample injector

Schematic flow diagram for the 8-port external volume sample injector, W and UW valves, all series.

10-port multifunctional valve

Schematic flow diagram for the 10-port multifunctional W and UW type valve, all series.

4-port switching valve

Schematic flow diagram for the 4-port switching valve, W and UW valves, all series.

3-port switching valve

Schematic flow diagram for the 3-port switching valve, W and UW valves, all series.

Dual sample size internal volume injectors

Instructions for rotating the rotor to change between the two sample sizes of a dual-volume injector.

Simultaneous injection: same sample onto 3 columns

A 14-port valve plumbing arrangement for loading the same sample into three loops and injecting onto three columns.

Simultaneous injection: 2 samples, 2 columns

A 12-port valve arrangement for loading and injecting two different samples onto two different columns.

P and E series valves: operation and cleaning

Operation notes, precautions, disassembly, cleaning, and reassembly for P and E series Valco valves.

10-port multifunctional P type valve

Schematic flow diagram for a two-position 10-port multifunctional switching valve, P type, all series.

Two-position helical drive air actuator

Implementation of Valco two-position air actuators using older solenoids; includes the paired 3-way solenoid arrangement.

Multiposition helical drive air actuator

Implementation using a 4-way solenoid and continuous air application for Valco multiposition actuators.

Position feedback for two-position air actuators

Installing Position Feedback for Air Actuators (PFAF) to provide permanent contact closure feedback.

Fused silica adapters

Installation and use of fused silica adapters for open tubular columns and Valco fittings.

Cheminert connecting accessories

Using the flanging tool to prepare PTFE tubing and assemble Cheminert tube end fittings.

Valco fitting instructions

Tubing preparation and assembly instructions for metal and PEEK zero dead volume fittings.

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EZR and IZR installation instructions

Installing external and internal reducers to adapt existing fittings and small transfer lines to Valco connections.

Cheminert flangeless fittings with collapsible ferrule

Assembly instructions for the one-piece collapsible ferrule used in Cheminert flangeless fittings.

IZERA1.5 installation instructions

Installation of 1/16-inch internal to 1/32-inch external adapters designed to prevent graphite ferrules sticking.

Cheminert one-piece 1/32-inch nanovolume fittings

Initial assembly and reuse of one-piece fittings with a breakaway grooved ferrule.

Cheminert 360 µm fittings

Installation and use of high-pressure fittings for direct connections to 360 µm OD tubing.

Zero dead volume fill port fittings

Installation and needle-seal adjustment for the ZVISF-1 fill port fitting and its polymer bushing.

Micrometering needle valves

Mounting and operating notes for BNV1 and ZBNV1 bulkhead-mounted micrometering valves.

DV-12 and DV-22 diaphragm valves: operation

Installation, actuation, and operating instructions for DV-12 and DV-22 sample injectors.

DV-12 and DV-22: diaphragm replacement

Disassembly and diaphragm replacement procedures for DV-12 and DV-22 valves.

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Air-actuated Valco on/off valves

Installation and operation of high-pressure air-actuated Valco on/off valves.

Model 202 flow controller

Specifications and adjustment instructions for the upstream-referenced Model 202 flow controller.

Lapping ends of fused silica tubing

Using the Fused Silica Prep Kit to produce clean, square tube ends for low dead volume connections.

DV-13 and DV-23 diaphragm valves: operation

Installation, actuation, and operating instructions for DV-13 and DV-23 sample injectors.

DV-13 and DV-23: diaphragm replacement

Disassembly and diaphragm replacement procedures for DV-13 and DV-23 valves.

MW and UW selectors: cleaning and alignment

Cleaning, rotor replacement, and alignment for MW and UW multiposition selectors on microelectric or universal actuators with keyed hardware.

Cheminert HPLC and UHPLC injectors

Cleaning, inspection, and rotor replacement instructions for Cheminert HPLC and UHPLC injectors.

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Cheminert C1 and C1CF: installation and maintenance

Panel mounting, fitting connections, use, and maintenance for Cheminert C1 and C1CF valves.

Cheminert 4-port internal sample injector

Schematic flow diagram for 4-port internal fixed-volume Cheminert injectors, high- and low-pressure models.

Cheminert C22(Z), C24(Z), and C25(Z)

Cleaning and rotor replacement for Cheminert C22, C24, C25, C22Z, C24Z, and C25Z models.

Cheminert CN2 and CN4: cleaning and rotor replacement

Maintenance and fitting precautions for CN2 and CN4 valves with 100-micron flowpaths and one-piece nanovolume fittings.

Cheminert flow-through stream selectors

Schematic flow diagrams for selectors that vent non-selected streams, including the Model C5F.

Cheminert C55 and C65(Z) selectors

Installation, electrical connections, motor control, and maintenance for C55, C65, and C65Z selectors.

Cheminert C42R: cleaning and rotor replacement

Cleaning, disassembly, and rotor replacement for the Cheminert Model C42R valve.