Manual

9
3.5 To Adjust Flow Rate (Figure B)
The 680 Pulsafeeder pumps are provided with a lock-in place micrometer knob adjustment for changing
length of stroke while in operation or idle. Push in on locking device and turn adjustment knob clockwise to
increase flow and counterclockwise to decrease flow. These indications can be converted to volumetric or
weight units by calibration conversion charts. On earlier model micrometer knobs you may increase the
friction on the adjustment or completely lock up the adjustment knob by removing the gear box cover and
tightening the friction nut on the adjustment shaft.
4. Operation and Maintenance
The preceding instructions have assisted you in proper installation and start-up of your 680 pump. The following
sections are arranged to assist in maintaining proper pump operation and troubleshooting any problems that might
develop during start-up or thereafter.
Accurate records in the early stages of pump operation will reveal the type and amount of maintenance that will
be required. A preventative maintenance program based on these records will insure trouble free operation. It is
not possible in these instructions to forecast the life of such parts as the diaphragm, check valves and other parts
in contact with the product you are handling. Corrosion rates and conditions of operation affect the useful life of
these materials so an individual metering pump must e gauged according to particular service conditions.