Hach-Lange ORBISPHERE 31xxx Installation and Maintenance - Manual (Page 24)

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Installation
4.5.3 Insertion/extraction valve
The ORBISPHERE 32003 insertion/extraction valve allows for sensor removal and installation
without having to drain the fluid in the line. It can withstand a pressure of up to 20 bars, with the
sensor in place or not. This device is held in place by a stainless steel clamp to a Tuchenhagen
Varivent® In-Line Access Unit.
Sensor insertion is done by aligning the sensor with the valve and tightening the retaining collar
until it stops. Removal is done by unscrewing the collar and pulling the sensor out.
4.5.4 ORBISPHERE flow chambers
The ORBISPHERE 32001. xxx flow chambers are used to draw liquid and gaseous samples
past the sensor. They are available in several materials, depending on the application.
They connect to 6-mm or ¼" stainless steel tubing by means of two Swagelok™ fittings. If
necessary, copper or plastic tubing with low permeability can be substituted. Stainless steel
tubing is normally enough to hold the assembly in place, but for a more stable installation, a
large U-bolt can be used to mount the flow chamber to a support.
Tuchenhagen Varivent® In-Line Access Unit
Purchasing a Tuchenhagen Varivent® In-Line Access
Unit, or an equivalent fitting with a 68mm flange
diameter from the fitting manufacturer is required to
make use of the 32003 ProAcc Valve.
Figure 9 Insertion/extraction valve
Dimensions of sensor and flow chamber assembly :
• Width: 50 mm
• Height: 210 mm
(add 100 mm for connection length)