Solvent Delivery Unit

*1) This plunger has a plunger fixing holder as an integrated part and is finely adjusted. A plunger assembly is not provided as a single part.
*2) The color of the current plunger is white. Plungers provided up to April 2002 were cream-colored and ones provided up to July 1998 were white.

Changing a material of a plunger seal may increase the service life depending on the type of the mobile phase used.

Notes for Changing a Material of a Plunger Seal

When changing a material of a plunger seal, parts other than the seal are also necessary.
See the details below.

*2) For early LC-10ATVP models, P/N 228-35147 (metallic) was used. Currently 228-35804 (trifluoroethylene) is used.

Rinsing Seal of the LC-10ATVP

When changing a material of a plunger seal from GFP to PE or changing the rinsing seal for the LC-10ATVP manufactured in June 1998 or earlier to the current seal, the rinsing seal and mounting parts for it also need to be changed.

When Changing a Material of a Plunger Seal from GFP to PE

When changing a plunger seal with one made of PE, the rinsing seal and mounting parts for it also need to be changed. The following additional parts are necessary.

• Rinsing seal P/N 228-28499
• Seal holder P/N 228-35816-91
• Ring holder P/N 228-39109-01

When Changing the Rinsing Seal Used on the LC-10ATVP Manufactured in June 1998 or Earlier to the Current One

When changing the rinsing seal to the current one (P/N 228-35145), the holder also needs to be changed. Use the P/N 228-35946-91 seal holder assembly (with a seal).

On the assembly, the filter main unit (stainless steel or ceramic), tube, coil spring, ferrule, bush, and other parts are mounted.

*1) Former standard accessories for the LC-20AD/AB/AT
*2) On the LC-10ADvp/10ATvp, 228-35871-96 is easier to handle than 228-48607-91.

*1) If acetonitrile (100 % and other high concentrations) is left, a heavy dirt may remain inside the check valve, causing a malfunction. This check valve can operate smoothly even under such circumstances. When using this valve, check the flowrate. The flowrate may need to be corrected.

*2) When using on the 10ADvp/10ATvp, check the flowrate. Correct the flowrate if necessary.

Rinsing the Check Valve

Check valve tends to get dirty easily as solvents go through them. When using a check valve for a long period of time, it is recommended to rinse the valve regularly. Rinse the check valve when the operation of the instrument is stopped after analysis is finished, on weekends, or during a long no operation period.

*1) Viton®is a registered trademark of DuPont Dow Elastomers Japan.

*2) On the LC-10ATvp units manufactured in June 1998 and later, the rinsing seal 228-35935 is used. On units manufactured earlier and ones with a polyethylene plunger seal, the rinsing seal 228-28499 is used. When changing the seal to a different type, the seal holder assembly also needs to be changed. (Details)