Operator`s manual

Operator's Manual: Models CB-1500 & CB-2500 (230 V / 50 Hz)
4-17
Installing the Pressure Relief Oil Line Back to the Tank
Figure 4K - Installing the Pressure Relief Oil Line Back to the Tank
ATTENTION: It is critical that you adhere to the following specifications for plumbing the pressure relief
back to the tank.
The metering pump requires the installation of a pressure relief oil line back to the tank that you are pulling oil
from as shown in Figures 4H, 4J, and 4K.
• The pressure relief will open and relieve pressure if there is a restriction in the pressure oil line,
clogged nozzle, etc.
Be sure to use Permatex #2 non-hardening gasket sealer to seal every threaded fitting. DO NOT use teflon
tape or teflon pipe dope compounds.
1. Refer to Figure 4K.
2. Remove the plug from the relief port on top of the metering pump head.
3. Install the 1/8 NPT x 1/4 tube compression fitting in the relief port on top of the metering pump head.
4. Install 1/4" O.D. copper tubing (user-supplied) from the pressure relief port back to the oil tank.
Refer to Figure 4J as needed.
# PART # DESCRIPTION
1 32475 METERING PUMP HEAD (7720)
5 32141 FLARED TUB. TO PIPE STRAIGHT 1/2 X 1/2NPT
6 INSTALLER SUPPLIED 1/2 COPPER OR ALUM. TUBING
3 32335 1/8 MNPT X 1/4FNPT
4 32474 PIPE REDUCER 1/2 − 1/4 BRASS HEX
9
5
1
7 32140 LONG NUT 1/2
2
6
7
8
2 32526 MINI BALL VALVE 1/8 MNPT X 1/8 FNPT
4
3
8 INSTALLER SUPPLIED 1/4 COPPER OR ALLUM.TUBING
9 32037 1/8MNPT X 1/4 COMP. FITTING