12 Maintenance
Replacing Parts of the Valve Head
2D-LC User Guide 330
Replacing Parts of the Valve Head
1 Remove capillaries from ports.
2 Loosen each fixing stator screw two turns at a time. Remove bolts from head.
3 Remove the stator head (and stator face if applicable).
4 Remove the stator ring.
5 Remove the rotor seal (and isolation seal if damaged or contaminated).
6 Install the new isolation seal (if required). Ensure the metal spring inside the
ring faces towards the valve body.
7 Install the new rotor seal.
8 Replace the stator ring. Ensure the stator ring is flush with the valve body.
9 Place the new (if required) stator face in place on the stator head. Reinstall the
stator head.
10 Insert the stator screws in the stator head. Tighten the screws alternately two
turns at a time until the stator head is secure.
11 Reconnect the pump capillaries to the valve ports.
12 Perform a Pressure Test to ensure the valve is pressure tight.
When
If valve leaks.
Tools required Description
Wrench, 1/4 inch
OR Hexagonal key, 9/64 inch
Wrong use of Pressure Test may damage valve.
The current implementation of the Pressure Test automatically uses the
maximum pressure generated by the pump used in the system.
 Do not use the test for modules having a lower maximum pressure than the
pump as this will damage the valve. For example do not use 400 bar valve in
a TCC or Flexible Cube in combination with a 600 bar pump.
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