Outlet Valve Maintenance; Replacing The Hydraulic Oil - Microfluidics MICROFLUIDIZER LV1 Series User Manual

5. As the check valve body detaches, the internal components will tend to fall out. Remove
the ball (6), spring (5), and cone (19).
a. If the ball is chipped or has deep scratches, it must be replaced.
b. If the spring is deformed or broken, it must be replaced. The ball seat will only need
to be replaced if it was chemically attacked by product or solvent, or if it marked.
Replacing the ball seat involves replacing the check valve body (18).
Reassembly
1. Place the ball (6) in the check valve body (18).
2. Place the spring (5) on top of the ball.
3. Apply Never-Seez grease to the thread of the check valve body and also to both ends of
the cone.
4. Place the cone (19) on top of the spring.
5. Slide the check valve body into the liquid end body inlet port.
6. While holding the check valve body to prevent rotating, tighten the 1/4" gland, first by
hand then with a wrench, preferably an adjustable wrench to about 20 ft-lbs.
7. Remove the liquid end body from the vise.
8. If necessary re-attach the liquid end body to the isolator. Refer to the Installing the Liquid
End Body section of this chapter. Before re-attaching the liquid end body to the isolator,
make sure the liquid end body threads are free of debris and lubricated with Never-Seez.

Outlet Valve Maintenance

The outlet valve (refer to drawing #801.00114 on the CD) must maintain effective metal-to-metal
sealing between the plug (3) and the interaction chamber. Always tighten the valve properly,
ensuring that the sealing washer (4) is held in place with Never-Seez before doing so.
1. Remove the outlet valve by loosening the 1/8" gland, being careful not to misplace the
sealing washer (4).
2. Remove the spring and plug.
3. Clean, lubricate, and reassemble, ensuring that the sealing washer (4) is held in place with
Never-Seez before doing so.

Replacing the Hydraulic Oil

With the exception of the suction strainer and the return line filter, repair or disassembly of the
hydraulic components requires special tools and training. Call the Customer Service Department at
Microfluidics at 1-800-370-5452 for further instructions.
4-LV-1-4 12/28/2010
Chapter 4: Maintenance
LV1 User Manual 4-11