How to replace check valve on QSM/ BSM - steps and video - WKB275812
Article number: 275812
OBJECTIVE or GOAL
How to replace check valve on QSM/ BSM
ENVIRONMENT
- ACQUITY UPLC H-Class
- ACQUITY UPLC H-Class Quaternary Solvent Manager (QSM)
- ACQUITY UPLC M-Class
- ACQUITY UPLC BSM
- ACQUITY UPLC H-Class Bio
- ACQUITY UPLC I-Class
- ACQUITY UPLC H-Class PLUS
- ACQUITY UPLC H-Class PLUS Bio
- ACQUITY UPLC I-Class PLUS
PROCEDURE
NOTE: Each check valve (CV) has a PEEK washer that needs to be inserted (flat side down) onto the top of the CV prior to installation.
- Power off the QSM/BSM
- For primary pump head rebuilds, raise the solvent lines above the mobile phase reservoir level to prevent siphoning.
- Use 1/4 inch spanner to remove 3 fittings under the check valves
- Remove finger tight fitting from active CV housing. A small drop of solvent may leak when this is removed.
- Use 1/4 inch spanner to loosen the active check valve housing and remove it from the pump head.
- Using a T8 torx driver, loosen the 4 screws on top of the active CV housing.
- Remove the old check valve by pulling it upwards.
- Place new CV into the CV housing. Ensure the washer is sitting on top of the new CV.
- Push in the tabs either side of the CV housing and tighten the 4 screws using the T8 torx drive.
- Reinstall the active CV housing into the pump head.
- Using the 1/4 inch spanner, tighten the active CV housing into the pump head with a 1/4 turn.
- Reinstall the finger tight tiffing into the active CV housing.
- Using the 1/2 inch spanner, remove the accumulator CV from the pump head.
- Install a new accumulator CV, ensuring the washer is installed on top of the CV.
- Using a 1/2 inch spanner, tighten the CV into place.
- Reinstall tubing connecting the accumulator CV to the primary transducer.
- Use a 1/4 inch spanner to tighten the fittings the last 1/4 turn.
- Reconnect the tubing to the accumulator transducer.
- Power on the QSM/BSM.
- Prime with MeOH** in one line for at least 5 minutes.
- Start the flow in MeOH** to energize check valves, keep instrument under flow for at least 5 minutes.
- Return proper phases for analysis.
ADDITIONAL INFORMATION
** Titanium filters should not be used in 100% methanol, a minimum of 5% water is required for Bio systems with Titanium solvent filters.
When using titanium mobile phase filters (sinkers), Waters recommends methanol with no less than 5% of water to reduce the possibility of titanium solubilization. Or when using methanol as a mobile phase we recommend using stainless steel solvent filters instead of titanium solvent filters.
link to video: https://site-436448.bcvp0rtal.com/detail/video/17286989001/replacing-the-check-valve