Internal Sample Injectors

diaphragm valve
4 port internal sample diaphragm valve
close move

Microvolume sample injectors are used to achieve sample sizes of .5 µl and 1 µl. The internal sample "loop" is actually an engraved connecting slot on the valve cap which is sized to contain a specified amount of sample. Valves are rated for 750 psi at 50°C, with Valco zero dead volume fittings for 1/32" or 1/16" tubing.

Actuator air (40-50 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. (Order separately.)

The valve is typically used for applications in which the sample is above ambient pressure, but can also be used at subambient pressures, such as when the sample is pulled through the valve by vacuum.

Includes stainless steel nuts and ferrules.

Fitting
size
Bore Sample
size
Product No.
1/32” 0.25 mm
(.010")
.5 µl DV12-1114-.5
1 µl DV12-1114-1
1/16” 0.40 mm
(.016")
.5 µl DV22-2114-.5
1 µl DV22-2114-1
0.75 mm
(.030")
.5 µl DV22-3114-.5
1 µl DV22-3114-1
Optional mounting kit DVBRKIT
Optional purge ring DV22-PURGE

MORE INFORMATION

SEE ALSO

TECH TIPS

  • Use the optional mounting kit, a ring that screws to a panel and clamps the valve collar, to surface mount a diaphragm valve.
  • Purging improves sensitivity by preventing any air from diffusing into the flow path. The optional purge ring is equipped with two 1/16" ports for the purge gas inlet and outlet.
diaphragm valve purge option