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Chromalytic Technology - Australian Distributors 'specialising in chromatography'
:  GC, HPLC & Fluid Transfer Products; Instrumentation Home : Sections

07

Valco / Cheminert Valve Selection

Valve Comparison Chart DJVu pages
VALCO VALVES (114-161)
CHEMINERT VALVES (166-195)
Complete Valco-VICI Catalog p000-285 DJVu format

Valco Injectors and Valves
for GC
DJVu catalog pages 120-129

   For 30 years Valco valves have been the industry standard in gas chromatography. Models are available with 3, 4, 6, 8, 10, 12, or 14 ports, with 1/32", 1/16", 1/8", or 1/4" fittings, and with bore sizes from 0.25 mm (.010") to 4 mm (.156").
In addition, Valco valves offer the widest range of rotor and body materials of any valve available, with alloys and polymer composites capable of meeting virtually any system requirement.
All models can be ordered in manual, pneumatic, or electrically actuated versions.

Valco Injectors and Valves for HPLC   DJVu catalog pages 130-135

   A pioneer and industry leader in products for HPLC, Valco continues to offer the market's most diverse line in terms of options for number of ports, fitting sizes, materials of construction, and actuation. 3, 4, 6, 8, 10, 12 port versions are offered, with 1/32", 1/16", or 1/8" fittings. As with the GC line, Valco valves offer the widest range of rotor and body materials of any valves available, with alloys and polymer composites capable of meeting virtually any system requirement.
All models can be ordered in manual, pneumatic, or electrically actuated versions.

Valco Multiposition Valves
DJVu catalog pages 142-155   

   One inherent benefit of the Valco conical rotary design is that it allows multiple planes of ports, facilitating a variety of unique multiposition configurations useful for stream selection, column selection, or trapping. Versions are available for GC and HPLC applications, with 1/16", 1/8", or 1/4" fittings, with bore sizes from 0.40 to 4.0 mm (.016" to .156").
Multiposition valves are available for up to 16 streams (34 ports), with all of Valco's trademark flexibility in terms of actuation and material options.

 Diaphragm Valves for GC                 DJVu catalog pages 162-164

   A diaphragm valve consists of plungers and ports arranged in a circular pattern, with the plungers controlled by the reciprocating action of two air actuated pistons.
Extremely long lifetime (typically 1,000,000 cycles at ambient temperature; approximately 500,000 cycles at elevated temperatures), very short actuation time (10 milliseconds), minimum internal dead volume, and reliability have made this type of valve very successful in process gas chromatography for both sample injection and column switching.
Our new miniature version features 1/16" or 1/32" zero dead volume fittings, and is the first to offer a 10 port configuration in addition to the 6 port and internal sample 4 port models.

Cheminert Injectors and Valves for HPLC DJVu catalog Pages 174-181

   In addition to standard 4, 6, 8, and 10 port versions, the Cheminert line of flat plate valves for HP/C features a through-the-handle injector and a rear-loading injector with a stationary centered injection port designed for use with autosamplers.
Also available is a submicroliter injector with the world's smallest injection volume, just 20 nanoliters. Valves feature 1/16" zero clead volume fittings with bore sizes from 0.15 mm (.006") to 0.75 mm (.030").
Most models are available in manual, air, or electrically actuated versions.

Cheminert Injectors and Valves for Low Pressure Applications      
DJVu catalog pages 182-185

   Cheminert's flat plate two position design offers 4, 6, 8, or 10 port configurations.
The latest design features internal fittings instead of tubes, with a choice of Valco 1/16" zero dead volume fittings or 1/4-28 Cheminert internal fittings for 1/16" or 1/8" OD tubing.
All models are available in manual, air, or electrically actuated versions.

Cheminert Multiposition Valves       DJVu catalog pages 188-195

   The rotary flat plate design allows 4, 6, 8, 10, 14, 20, 24, or 26 position stream selection valves, in high pressure and low pressure models.
A variety of configurations are available with bore sizes from 0.25 mm (.010") for HPLC column selectors up to 4.6 mm (.180") for applications requiring minimal restriction across the valve.
Metal or all-polymeric valves can be ordered, with models available in manual, pneumatic, or electrically actuated versions. a

Valve Comparison Chart

We offer valves in so many sizes, materials, and specialized port configurations that the choices may at first seem daunting. This chart provides a quick overview of the valve designs available from VICI. The features listed in the column at left are discussed at each valve section.

FEATURES

VALCO GC

VALCO HPLC

VALCO MultiPosition

DIAPHRAGM

Application area

GC LC, FIA Process Analysis

HPLC, SFC, SFE, Process Analysis

HPLC, LC, GC, SFC, SFE, FIA Process Analysis

GC Process Analysis

Two position port configurations

3,4,6,8,10,12 and 14; 4 port internal sample

3,4,6,8,10,12 and 14; 4 port internal sample

6 and 10; 4 port internal sample

 Internal sample sizes

.06, .1, .2, .5, 1, and 2 ul

.06, .1, .2, .5, 1, and 2 ul

.5 and 1ul

Minimum external sample size

2ul - W Type 5 ul - UW Type

 2 ul- W Type 5ul - UW Type

5ul

Multiposition configurations

-

SD, SC, SF, ST, and STF; 4,6,8,10,12, and 16 positions

Fitting sizes

1/32", 1/16", 1/8", and 1/4" Valco ZDV

1/32", 1/16", and 1/8" Valco ZDV

1/16", 1/8", and 1/4" Valco ZDV

1/32" and 1/16" Valco ZDV

Port sizes

Extensive variety of port sizes available

Extensive variety of port sizes available

Extensive variety of port sizes available

 0.25 mm (.010") 0.40 mm (.016") 0.75 mm (.030")

Maximum temperature

up to 350°C

 up to 75°C

up to 300°C

 200°C

Actuation options

Manual, air, microelectric, and standard electric

Manual, air, microelectric, and standard electric

 Manual, air, microelectric, and standard electric

 Air (integral)

Available body materials

    N60 stainless steel Type 316 SS, Hastelloy C Incone1600, Mone1400, Nickel 200, Nitronic 50, Titanium, Zirconium

 N60 stainless steel "ype 316 SS, Hastelloy C Incone1600, Mone1400, Nickel 200, Nitronic 50, Titanium, Zirconium

N60 stainless steel Type 316 SS, Hastelloy C Incone1600, Mone1400, Nickel 200, Nitronic 50, Titanium, Zirconium

N60 stainless steel Type 316 SS Hastelloy C

Available rotor materials

Valcon E, Valcon M, Valcon P, Valcon R, Valcon T, Valcon TF

Valcon E Valcon H

Valcon E, Valcon E2, Valcon H, Valcon M, Valcon P, Valcon R, Valcon T, Valcon TF

Polyimide

FEATURES

CHEMINERT HPLC

CHEMINERT LOW PRESSURE

CHEMINERT MULTI

Application area

HPLC, SFC, SFE, Process Analysis

  LC, FIA, Process Analysis

 HPLC, FIA, LC, Process Analysis

Two position port configurations

 4, 6, 8, and 10; 4 port internal sample through-the-handle injector; centered port injector

 4, 6, 8, and 10; 4 port internal sample

Internal sample sizes     

.02, .05, .1, .2, and .5ul

 .2, .5, and 1 ul 5ul

Minimum external sample size

2ul

5ul

Multiposition configurations

 4,6,8,10,14, 20, 24, and 26 positions

Fitting sizes

1/16" Valco ZDV

1/16" Valco ZDV 1/4-28 Cheminert

 1/16" Valco ZDV 1/4-28, 1/2-20 Cheminert

Port sizes

0.25 mm(.010") 0.75 mm (.030")  0.40 mm (.016")

 Extensive variety of port sizes available

 Extensive variety of port sizes available

Maximum temperature

up to 75°C

up to 75°C

up to 75°C

Actuation options

Manual, air, microelectric, and standard electric

Manual, air, microelectric, and standard electric

Manual, air, microelectric, and standard electric

Available body materials

 N60 stainless steel Hastelloy C PAEK Titanium Type 316 SS

PPS CTFE PVDF

N60 stainless steel, PPS, CTFE, PAEK, PVDF, Hastelloy C, Titanium Type 316 SS

Available rotor materials

Valcon E Valcon H Valcon T

Valcon E2 Valcon M Valcon TF CTFE

  Valcon E, Valcon E2, Valcon H, Valcon M, Valcon TF, CTFE