Chromatographie

Diaphragm Valves

The VICI mini diaphragm valve has been designed for trouble-free use in applications requiring minimal maintenance and maximum lifetime, making it an ideal choice for the process industry, automated lab analyzers, or continuous-monitoring environmental analyses.

Design
The mini diaphragm valve consists of plungers and ports arranged in a circular pattern, with the plungers controlled by the reciprocation action of two air actuated pistons. Maintenance procedures are greatly simplified, since a single screw holds the valve together and locating pins insure proper alignment. Extremely long lifetime, 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.
Only 35 mm (1.375") in diameter
>1,000,000 cycle lifetime
Three configurations-6 port, 10 port, and 4 port internal sample
Built in actuator
1/16" or 1/32" Valco zero dead volume fittings		 TECH TIP

For optimal zero dead volume connections, make sure your tubing meets the best industry standards. OD tolerance should be nominal dimension +.002".

Spezifikationen

Dimensions Valve diameter is 35 mm (1.375"), height is 42 mm (1.625"), and weight is less than 255 g (9 oz).
Valve Fittings The valve cap has Valco 1/32" or 1/16" ZDV fitting details - a rugged design which allows easy replacement of tubing or of the valve itself.

Standard bore size is 0.40 mm (.016" ). Optional bore sizes are 0.25 mm (.010") and 0.75 mm (.030").
Lifetime Diaphragm valve lifetime can exceed 1,000,000 cycles at ambient temperature or 500,000 cycles at 200°C.
Temperature/Pressure Specifications The standard valve can be operated at temperatures up to 200°C, at 300 psi. The specially-formed diaphragm also permits sampling at subambient pressures.
Materials of Construction The cap is Nitronic 60 stainless (optional Hastelloy C or Type 316 stainless), with remaining metal parts of 300 series stainless. The diaphragm is formed from a specialized polyimide.
Actuation Actuator air (50-60 psi) is supplied to a side port with 10-32 female threads, permitting use of a variety of compression or barbed fittings. A 3-way solenoid is required for actuation.

Diaphragm valves, 1/32" fittings, 0.25 mm ports (.010")
Includes stainless steel nuts and ferrules.
A 3-way solenoid is required for actuation. Order separately.

Spezifikationen

Internal sample:
750 psi liq
50°C max

Sampling/switching:
300 psi liq
200°C max
Nitronic 60 valve body Polyimide diaphragm
Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück
DV12-1114-.5 1579,40 DV12-1114-1 1579,40 DV12-1116 1579,40 DV12-1110 1772,01

Diaphragm valves, 1/16" fittings, 0.40 mm ports (.016")
Includes stainless steel nuts and ferrules.
A 3-way solenoid is required for actuation. Order separately.

Spezifikationen

Internal sample:
750 psi liq
50°C max

Sampling/switching:
300 psi liq
200°C max
Nitronic 60 valve body Polyimide diaphragm
Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück
DV22-2114-.5 1348,27 DV22-2114-1 1348,27 DV22-2116 1348,27 DV22-2110 1540,88

Diaphragm valves, 1/16" fittings, 0.75 mm ports (.030")
Includes stainless steel nuts and ferrules.
A 3-way solenoid is required for actuation. Order separately.

Spezifikationen

Internal sample:
750 psi liq
50°C max

Sampling/switching:
300 psi liq
200°C max
Nitronic 60 valve body Polyimide diaphragm
Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück Artikelnummer Preis in €/Stück
DV22-3114-.5 1348,27 DV22-3114-1 1348,27 DV22-3116 1348,27 DV22-3110 1540,88

Replacement diaphragms for DV valves

Beschreibung Artikelnummer Preis in €/Stück
Polyimide diaphragm
for.010" or.016" DV22-21 D 92,49
for .030"  DV22-31 D 92,49
PTFE diaphragm   
  DV22-22D 77,05

 

1/16" Stainless steel loops  for DV valves

Each stainless steel loop includes:
two stainless nuts and two stainless ferrules. Order special fittings separately.

For 1/32" Loops use NW loops
Volume Artikelnummer Preis in € / Stück Volume Artikelnummer Preis in € / Stück
2 µl CSL2 27,71 250 µl CSL250 38,52
5 µl CSL5 27,71 500 µl CSL500 38,52
10 µl CSL10 27,71 1 ml CSL1K 43,16
20 µl CSL20 27,71 2 ml CSL2K 55,52
50 µl CSL50 27,71 5 ml CSL5K 64,68
100 µl CSL100 38,52 10 ml CSL10K 84,77

 

Applcations for Diaphragm Valves

4 PORT SAMPLE INJECTOR Microvolume Sample Injection

The internal sample (fixed volume) flowpath is used when very small sample volumes are required.The sample size is determined by a passage engraved on the valve cap, allowing precise, repeatable injections. In Position A, the sample flows through the sample passage while the carrier flows through to the column. In Position B, the sample passage is in line with the column and the carrier injects the contents of the sample passage into the column.

6 PORT SAMPLE INJECTOR Sample Injection

With the valve in Position A, sample flows through the external loop while the carrier flows directly through to the column. When the valve is switched to Position B, the sample contained in the sample loop and valve flow passage is injected into the column.

10 PORT SAMPLE INJECTOR Loop Sampling with Backflush of Pre-Column to Vent

When components of interest are low boiling, this plumbing scheme allows "heavy" components with long retention times to be backflushed to waste. After the sample loop is loaded in Position A, the valve is switched to Position B to inject the sample into column 1. As soon as all components of interest have entered column 2, the valve is switched back to Position A. Column 1 is backflushed to vent during the analysis, reducing the total analysis time.