Maintaining Connections And Fittings - Microfluidics MICROFLUIDIZER LV1 Series User Manual

CAUTION: ABRASIVE MATERIALS SHOULD NOT BE RUN THROUGH THE MICROFLUIDIZER UNLESS
THE UNIT WAS SPECIFICALLY DESIGNED FOR SUCH AN APPLICATION.

Maintaining Connections and Fittings

All high pressure connections on the LV1 are coned and threaded connections. DO NOT use Teflon
tape on the fittings. These connections provide a metal –to-metal seal with the gland providing
the sealing force.
The threads on the collar and piping are left-hand threads. Turn the collar counterclockwise until
there are approximately 2-3 threads exposed. When assembling, tighten the glands finger tight.
Then, with a wrench, tighten to the recommended torque. For required torque, refer to Drawing
#B-11028 Coned and Threaded Connections on the CD.
CAUTION: DO NOT OVERTIGHTEN THESE FITTINGS AS EXCESSIVE TORQUE WILL DEFORM THE
METAL-TO-METAL SEALING SURFACE. DAMAGE TO THE SEALING SURFACES OF THE TUBING OR
THE FITTING SEAT WILL RESULT IN LEAKAGE THROUGH THE WEEP HOLE IN THE FITTING.
CAUTION: IF ANY CONED AND THREADED CONNECTIONS ARE LOOSENED TO REMOVE
COMPONENTS, THEY MUST BE FULLY DISASSEMBLED AND CLEANED BEFORE REASSEMBLY.
Symptom
Processor consistently
makes hiccup-like
response in Run mode
after lengthy down time
Excessive noise from the
hydraulic pump
Intensifier chatters or
stalls
5-LV-1-4 8/3/11
Chapter 5: Troubleshooting
Possible Cause
Stuck accumulator
piston
Faulty connection to
pressure switch
Pressure switch needs
adjustment or
defective.
Low oil level
Suction line restriction
Air/foam entrapment
Oil is too viscous
Inoperative proximity
switches
Stuck directional
control valve
LV1 User Manual
Remedy
Follow initial setup instructions in
Chapter 3.
Check and secure electrical
connections.
Adjust or replace pressure switch
Fill to recommended level
Inspect the suction strainer of the
reservoir. Clean if necessary.
Purge air from hydraulic system
Use recommended type oil
Replace switches
Manually override the directional
control valve
5-2