Switching valve causing over pressure
My switching valve is causing over pressure (MSA application).
- Does your valve have corrosion like the images shown?
- Yes? Replace with part numbers (can try rebuilding, 075973 or just replacing the pod, 075971, before ordering entire valve assembly).
Part Number Description Revision 075917 VALVE,6PORT,PK,RHEO,TITAN,6K,RoHS C 069561 VALVE,6PORT,PK,TITAN,I2C B 075971 VLV POD ASSY,6 PORT,RHEO,PK,6K B 075973 KIT,REBUILD, VLV, 6-PORT,6K B
- No? Follow the steps below.
- Check system pressure of the system before the load/inject valve, disconnect tubing from port 2 or P. Turn pump on and record pressure.
- If normal pressure, disconnect port 3 or C so only the valve is inline, not the columns. Record the pressure.
- You should not see much of a pressure increase.
- If you do, take the valve apart and clean rotor and stator by taking 3 Allen screws off from valve front
- Remove the rotor and stator and sonicate in 50/50 methanol/DI (picture below)
- Make sure you can see light through 6 small openings in stator. (round disc). Also verify you can see light through stator face (the tan colored piece where you took off the allen screws, look through all 6 ports from front to see light.)
- If you cannot see light through the ports, hook up syringe or pump and clear blockage of stator.
- Once you have verified no blockages in the valve reassemble the valve and hook a fluid connections back up and run step 6 again.
- If pooling still occurs please call Tech Support.
|MSA3.png||January 12, 2022|
|MSA2.png||January 12, 2022|
|MSA1.png||January 12, 2022|
|MSA4.png||January 12, 2022|
|MSA5.png||January 12, 2022|
|MSA6.png||January 12, 2022|
|MSA7.png||January 12, 2022|