Checkpoint 1250 Series Operating Manual
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Checkpoint 1250 Series Operating Manual

Pneumatic chemical injection pump
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Series 1250 Pneumatic Chemical Injection Pump
Operating Manual
Series 1250
Pneumatic Chemical Injection Pump
Operating Manual
CP Pumps & Systems FZE
CheckPoint Systems Pte Ltd
Louisiana, US
Aberdeen, UK
Unit AA08, LIU 10
21356 Marion Lane
Unit C2 Lombard Centre
21 Toh Guan Road East
Jebel Ali South | PO Box 262131
Mandeville, LA 70471
Kirkhill Place, Kirkhill Industrial Estates
#04-17 Toh Guan Centre
Dubai | UAE
+1 (504) 340-0770
Dyce, Aberdeen, AB21 0GU Scotland
Singapore 608 609
+971 (4) 8806278
+44 (0) 1224 775205
+65 6261 7687
CP/MAN-PRD-015
REV. 15
EFF. DATE: 07/08/2022
Page 1 of 19

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  • Page 1 Series 1250 Pneumatic Chemical Injection Pump Operating Manual Series 1250 Pneumatic Chemical Injection Pump Operating Manual CP Pumps & Systems FZE CheckPoint Systems Pte Ltd Louisiana, US Aberdeen, UK Unit AA08, LIU 10 21356 Marion Lane Unit C2 Lombard Centre...

  • Page 2: Table Of Contents

    Series 1250 Pneumatic Chemical Injection Pump Operating Manual TABLE OF CONTENTS 1. PUMP INSTALLATION Process Design & Setup ........................... 3 Connecting The Chemical Supply ......................5 Connecting The Supply Gas ........................6 2. GAS RECOVERY SYSTEMS - INSTALLATION 3. PUMP OPERATION Bleeding/Priming the Pump ........................

  • Page 3: Pump Installation

    All the components shown above are recommended by CheckPoint to maximize productivity and life of the pump in typical field or plant use. CheckPoint is available to answer your process questions or to help design and build a skid system utilizing components appropriate for your application.
  • Page 4 1.1.4 CheckPoint recommends use of a calibration gauge for your assurance of proper pump function and chemical delivery rate. Please read the section in this Guide entitled 3.2.1 Setting Pump Speed Using a Calibration Gauge for more information.

  • Page 5: Connecting The Chemical Supply

    1.1.11 Pulsation dampeners are sometimes specified in systems utilizing Series 1250 pumps. CheckPoint does not recommend their use because the low flow rates of all Series 1250 pumps do not generate harmful pulsation in most systems.

  • Page 6: Connecting The Supply Gas

    Check that the packing nut is properly adjusted. In a new pump, proper adjustment is finger-tight, plus 1/6 of a turn. Use a packing adjustment tool (available from CheckPoint at no charge) for best results. IMPORTANT: PLEASE REVIEW Section 5.1: Packing Adjustment on page 14.
  • Page 7 Alternatively, if alcohols or other unusual liquids will be present in the supply gas, CheckPoint can supply other seal materials for the motor. CAUTION: Always use a gas pressure regulator if the possibility of supply pressures in excess of 200 psig exists.

  • Page 8: Gas Recovery Systems - Installation

    For more information on how to set up a recovery system for the GR Series chemical injectors, please contact CheckPoint or an authorized distributor. In many cases CheckPoint may elect to run a test at our factory to determine if the GR will handle your specific needs.

  • Page 9: Setting The Pump Stroke Rate

    3.2.1.4 Now ensure that the CheckPoint pump is running. Take note of the level of chemical in the gauge using the appropriate scale for the volume units you want to measure the pump’s output in. Usually the gauge will show liters on one scale and quarts or gallons on the other.
  • Page 10 Series 1250 Pneumatic Chemical Injection Pump Operating Manual near the bottom of the gauge, or when one minute has expired (whichever comes first), stop timing, note the ending level on the gauge, and reopen the Chemical Supply Valve. 3.2.1.7 Write down the amount of time in seconds and the final gauge reading, then close the Gauge Fill Valve. Failure to reopen the Chemical Supply Valve will result in the pump quickly depleting the remaining chemical in the gauge and running on air, necessitating pump re-priming.
  • Page 11 Series 1250 Pneumatic Chemical Injection Pump Operating Manual FIGURE 4: VOLUME FACTOR TABLE, SERIES 1250 PLUNGER DIAMETER VOLUME FACTOR 1/8 IN 3.477 1/4 IN 0.869 3/16 IN 1.545 3/8 IN 0.386 1/2 IN 0.217 1/8 IN SHORT STROKE 0.0061 3/16 IN SHORT STROKE 0.0138 1/4 IN SHORT STROKE 0.0245...
  • Page 12 Series 1250 Pneumatic Chemical Injection Pump Operating Manual 3.2.2.4 Finally, ensure that the Target Stroke Rate does not exceed the maximum recommended stroke rate. If the Target Stroke Rate exceeds the maximum recommended stroke rate for the type of service you intend, it will be necessary to use a larger plunger size: FIGURE 6: MAXIMUM RECOMMENDED STROKE RATE, SERIES 1250 MAXIMUM RECOMMENDED...

  • Page 13: Air/Gas Consumption

    0.7034 5. PUMP MAINTENANCE The CheckPoint Series 1250 is designed to provide trouble-free operation for many years with little adjustment, lubrication, or other routine maintenance. However, like any other device, proper maintenance can extend the life of the product. This can include packing adjustment, periodic cleaning of the gas and chemical inlets, and lubrication.

  • Page 14: Packing Adjustment

    Use a CheckPoint T55-101 packing adjuster, which is specifically designed for this purpose. If one is not available, you may order one at no charge directly from CheckPoint. In an emergency or if time is short, a 6” length of ¼” OD tubing or metal rod may be used.
  • Page 15 AB056731 (B Model) and AG057154 (GR Model) and earlier. Clean the sleeve and lightly grease it, then install the new O-ring and backup ring supplied with your new packing. If you cannot locate these parts, please contact CheckPoint for replacements. Your 1/8” pump may leak chemical without replacing these components whenever you replace the packing.

  • Page 16: Lubrication

    Adjust the packing nut per the directions in Section 5.1. 5.3 Lubrication The CheckPoint Series 1250 motor was designed to run under "stone-dry" internal conditions in the motor end. However, regular lubrication will maximize the life of the pump and thus add value to your investment. In addition CP/MAN-PRD-015 REV.

  • Page 17: Troubleshooting

    Set the lubricator rate as low as possible, one to two drops per minute, unless cold conditions dictate more in order to prevent freezing of the gas supply. CheckPoint offers both a small and a large in-line lubricator;...

  • Page 18: Pump Does Not Stroke

    If, after removal of the housing with the spool still inside, the spool will not move with light finger pressure inside the housing, call CheckPoint to order a replacement spool made of a different material.

  • Page 19: Other Problems

    Chemical may be attacking packing elastomer material The packing will appear swollen or badly damaged once removed from the packing gland if it is being attacked by the chemical. Contact CheckPoint or your authorized CheckPoint distributor. If the chemical has recently been changed or if the pump has just been placed in service, there is a good chance that new packing materials are needed to do the job.

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