1250E & 1500E Electric Pump
Operating Manual
CP/MAN-PRD-1215E REV. 02 EFF. DATE: 12/15/12 Page 7 of 13
CAUTION: REMOVING FOREIGN DEBRIS FROM SUCTION LINES AND CHEMICAL
CONTAINERS WILL SUBSTANTIALLY EXTEND THE LIFE OF THE PACKING AND
OTHER COMPONENTS OF THE PUMP. EVEN A NEW CHEMICAL TANK CAN
CONTAIN DEBRIS THAT CAN BE CARRIED INTO THE PUMP AND DAMAGE IT.
NOTE: If premature scoring of the pump plunger or early packing failure is observed during
operation, a likely cause is abrasive particles carried into the pump through the
suction plumbing. Use of a pre-suction in-line chemical filter such as the CheckPoint
F40 Series and/or a ceramic or Hastelloy™ plunger is recommended.
CAUTION: SUBSTANTIAL SCORING OF THE PLUNGER CAN LEAD TO SEVERE LEAKAGE
OF CHEMICAL INTO THE ENVIRONMENT.
8.1.1. Connect the chemical suction line to the suction check valve on the pump head. The suction
check valve has a 1/4” NPT male thread (for Series 1250 heads) or a ½” NPT male thread
(for Series 1500 heads), with an arrow indicating chemical flow direction towards the pump
(see Figure 5 at the end of this Manual).
NOTE: Always apply Teflon™ tape or other appropriate thread sealant to the check valve
threads prior to attachment to prevent leakage.
CAUTION: NEVER RE-LOCATE THE SUCTION OR DISCHARGE CHECK VALVES AWAY
FROM THE CHEMICAL HEAD. TO OPERATE PROPERLY, CHECK VALVES MUST
REMAIN DIRECTLY ATTACHED TO THE CHEMICAL HEAD. IF DESIRED, A
SECONDARY DISCHARGE CHECK MAY BE PLACED DOWNSTREAM OF THE
PRIMARY DISCHARGE CHECK VALVE.
8.2. Connect your discharge line to the discharge check valve. This is a 1/4” NPT male thread on the
Series 1250 head and ½” NPT male thread on the Series 1500 head. An arrow is stamped on the
discharge check valve pointing away from the pump.
8.3. Check that the packing nut is properly adjusted. In a new pump, proper adjustment is finger-tight,
plus 1/8 of a turn. Use a packing adjustment tool (available from CheckPoint at no charge) for best
results. IMPORTANT: PLEASE REVIEW Section 11: Packing Adjustment.
CAUTION: DO NOT OVER-TIGHTEN THE PACKING NUT. APPLYING EXCESS TORQUE TO
THE PACKING NUT WILL DECREASE THE LIFE OF THE PACKING.
8.4. Open the process block valve, allowing the process pressure to reach the chemical head. Correct
any leakage observed.
9. BLEEDING/PRIMING THE PUMP
9.1. The bleed screw is fitted with a 1/8” NPT female connector to allow the user to tube chemical used
in the bleeding process to a safe area.
9.2. Prior to bleeding air from the pump head, check to ensure that the packing nut is properly
adjusted. Before attempting to adjust or tighten the packing nut, please read Section 11: Packing
Adjustment. It is important not to over-tighten the packing nut.
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