Reference Information - GE IV-908 Instructions Manual

6 Reference information

Instructions 56-8101-02 Edition AE
Description
The valve consists of two main parts:
• Housing which encloses the motor
and electronics.
• Valve body with a rotating 360°
central core.
The main difference between the IV-908 and PV-908 is the diameter of
the flow channels and the maximum pressure ratings. PV-908 has 0.8 mm
channels while IV-908 has 1.2 mm channels which allow higher flow rates at
lower back pressure.
As the channel plate is turned by the motor,
the central port on the front is connected to
one of the peripheral ports 1–8, allowing a
clear liquid path.
Valve switching is controlled from UNICORN
by reading the actual position of the channel plate.
The material used in the switching parts ensures both
long mechanical and chemical lifetime.
The valve housing contains no user replaceable items.
Technical specifications
Operating data
Max Flow rate
IV-908
PV-908
Max Pressure
IV-908
PV-908
Back pressure
IV-908
PV-908
Leakage
IV-908
PV-908
pH stability range
Viscosity
Housing
Valve body
100 ml/min
100 ml/min
2 MPa (20 bar, 290 psi)
25 MPa (250 bar, 3600 psi)
< 3 kPa at 100 ml/min with water
< 40 kPa at 100 ml/min with water
< 0.1 μl/min at 2 MPa
< 0.1 μl/min at 25 MPa
1–13, 1–14 (<1 day exposure)
Max. 5 cP
Reference information 6
Central port
1
2
3
4
Peripheral ports
8
7
i/o
6
5
13