Instructions-Parts Dosing Pumps 332339B EN To pressurize and proportion fluid in a ProMix® PD2K Electronic Positive Displacement Proportioning System. For professional use only. Important Safety Instructions Read all warnings and instructions in this manual and in your PD2K proportioner manual. Save these instructions. See page 2 for model part numbers and information. PROVEN QUALITY. LEADING TECHNOLOGY.
Contents Models............................................................... 2 Reconnect the Lower to the Driver ................ 16 Warnings ........................................................... 3 Parts.................................................................. 17 Pump Assembly........................................... 17 Lower Pump Assembly................................. 18 Pump Driver Assembly ................................. 20 Setup................................................
Warnings Warnings The following warnings are for the setup, use, grounding, maintenance and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risks. When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.
Warnings WARNING MOVING PARTS HAZARD Moving parts can pinch, cut or amputate fingers and other body parts. • Keep clear of moving parts. • Do not operate equipment with protective guards or covers removed. • Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure and disconnect all power sources. TOXIC FLUID OR FUMES Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or swallowed.
Setup Setup Pump Components Figure 3 Pump Components 332339B Component Description A Stepper Motor B Driver C Pump Lower D Up Inlet Dose Valve E Down Inlet Dose Valve F Up Outlet Dose Valve G Down Outlet Dose Valve H Fluid Outlet Manifold J Fluid Inlet Check Valve K Fluid Inlet Manifold L Fluid Outlet Check Valve M Fluid Outlet Pressure Sensor N Cable Connection to Pump Control Module P Fluid Inlet Pressure Gauge R Fluid Outlet Fitting (1/4 npt(m) S Fluid Inlet Fitting (
Setup Air Connections Red and green 5/32 in. (4 mm) tubing connects the solenoid manifold to the pump’s dosing valves. See the Pump Tubing Schematic on the next page. NOTE: Tubing lengths must be 18 in. ± 1/2 in. (457 mm ± 13 mm) for all connections. Always use equal lengths of tubing, to balance the timing of the valves. Lengths longer than 18 in. (457 mm) will increase valve response time. 1.
Setup c. Connect green tubing (G) from the DOWN OPEN fitting to the 90° tube fitting on the side of the OUTLET DOWN dosing valve. d. Connect red tubing (R) from the DOWN CLOSED fitting to the 90° tube fitting on the end of the OUTLET DOWN dosing valve. 3. Repeat these steps for each pump in your system. See the following table to understand the relationship between pump stroke and dose valve actuation.
Setup Fluid Connections 1. Connect a 1/4 npt(f) fluid hose from the fluid source to the check valve (J) at the pump’s fluid inlet manifold (K). The inlet dose valves (D, E) will open and close alternately at the pump stroke changeover, to maintain a steady flow into the pump. 2. Connect a 1/4 npt(f) fluid outlet hose from the check valve (L) at the pump’s fluid outlet manifold (H).
Repair Repair Preventive Maintenance Schedule The operating conditions of your particular system determine how often maintenance is required. Establish a preventive maintenance schedule by recording when and what kind of maintenance is needed, and then determine a regular schedule for checking your system. 6. Disconnect all air and fluid lines from the dosing valves and manifolds. Be sure to label the lines to ensure they are re-connected correctly. 7. Pull the lower away from the driver. a.
Repair Driver Repair Disassemble the Driver Reassemble the Driver 1. See Disconnect the Lower from the Driver, page 9. 1. If the guide (205) and coupling nut (204) were removed, apply primer and thread adhesive to the bottom threads of the actuator (201). Install the guide and coupling nut. Torque the coupling nut to 15–25 ft-lb (20–34 N•m). Allow 12 hours for the adhesive to cure. 2. Remove the four screws (201e) and remove the motor (202) from the actuator (201).
Repair Figure 11 Driver Assembly 332339B 11
Repair Lower Repair Disassemble the Lower 1. Remove the lower from the driver; see Disconnect the Lower from the Driver, page 9 . 2. Remove the top and bottom throat cartridges (4) to expose the piston rod (2a/2b). 3. Push the piston rod assembly down out the bottom of the cylinder (1). 4. Disassemble the piston rod (2a, 2b), using the flats on both ends. Remove the piston parts (12–16, 42) from the lower rod (2b). 5. Unscrew the upper packing nut (5) from the upper throat cartridge (4).
Repair Figure 12 Lower Pump Assembly 332339B 13
Repair Reassemble the Lower 1. Install the manifolds (19, 20) on the cylinder (1). Lubricate the o-rings (21) and ensure they are in place on the mating surfaces. Apply thread adhesive to the screws (26) and torque to 13–23 in-lb (1.5–2.5 N•m). 5. Apply thread adhesive to the male threads of the lower rod (2b). Screw the upper piston rod (2a) onto the lower rod, using the flats on both ends. Torque to 35–45 ft-lb (48–61 N•m). 6. Insert the piston rod assembly into the cylinder (1) from the bottom.
Repair 8. Install the o-rings (7) on the lower packing nut (6). Screw the packing nut into the lower throat cartridge (4). Torque to 20–30 ft-lb (28–40 N•m). 12. Install the o-ring (7) on the upper packing nut (5). Screw the packing nut into the upper throat cartridge (4). Torque to 20–30 ft-lb (28–40 N•m). 9. Slide the lower packing cartridge (4) onto the piston rod (2) and screw the cartridge into the cylinder (1). Torque to 35–45 ft-lb (48–61 N•m). 13.
Repair Reconnect the Lower to the Driver 1. Ensure that the air fitting (17) is removed and set aside. 2. Screw the jam nut (105) and connector (104) onto the pump cylinder (1), all the way to the bottom of the threads. 3. Align the holes in the connector (104) with the ports in the throat cartridge (4). 4. Torque the jam nut (105) to 65–75 ft-lb (88–101 N•m). 5. Reinstall the TSL inlet fitting (17) in the open port. 6. Place the o-ring (106) on the piston rod (2). 7.
Parts Parts Pump Assembly 24T788, Series A, 35 cc Low Pressure Pump 24T789, Series A, 35 cc High Pressure Pump 24T790, Series A, 70 cc Low Pressure Pump 24T791, Series A, 70 cc High Pressure Pump Ref Part Description Qty 24T794 1 103 16N762 DRIVER, low pressure; Models 24T788 and 24T790; see Pump Driver Assembly, page 20 DRIVER, high pressure; Models 24T789 and 24T791; see Pump Driver Assembly, page 20 LOWER, pump, 35 cc; Models 24T788 and 24T789; see Lower Pump Assembly, page 18 LOWER, pump, 70 cc
Parts Lower Pump Assembly 24T792, Series A, 35 cc Lower 24T793, Series A, 70 cc Lower A fourth u-cup (10) is used in this position on Model 24T793 only.
Parts 24T792, Series A, 35 cc Lower 24T793, Series A, 70 cc Lower Ref Part Description Qty 1 24U604 1 1 2 24T842 2a ——— CYLINDER, 35 cc; Model 24T792 CYLINDER, 70 cc; Model 24T793 KIT, piston rod assembly; includes items 2a and 2b ROD, piston, upper 2b ——— ROD, piston, lower 1 4 16N750 2 5 16N751 FITTING, throat cartridge NUT, packing, upper 1 6 16T350 NUT, packing, lower 1 7 *† O-RING; ptfe 5 8 16T352 GUARD, rod; Model 24T792 GUARD, rod; Model 24T793 PLUG, pipe; 1/2 npt 1
Parts Pump Driver Assembly 24T794, Series A, Low Pressure Pump Driver 24T795, Series A, High Pressure Pump Driver Ref Part Description Qty 201 16N742 ACTUATOR, linear; for 24T794 ACTUATOR, linear; for 24T795 COUPLER 1 INSERT, coupler 1 SCREW, coupler 2 SCREW, motor mounting MOTOR, stepper, 23 frame; for 24T794 MOTOR, stepper, 34 frame; for 24T795 HOUSING, actuator; for 24T794 4 16N777 201a - — — 201b — — — 201c - — — 201d — — — 202 16P037 16P036 203 16N743 1 Ref 1 Description Qty 16
Repair Kits, Related Manuals, and Accessories Repair Kits, Related Manuals, and Accessories Description Kit Part No. Kit Description All pumps in this manual. 24T843 Dosing Valve Seat Replacement Kit. Includes seats and o-rings for all four dosing valves on a pump. 24T302 TSL Cup Kit 24T303 Throat Seal Installation Tool. Also included in Seal Kits 24T840 and 24T841. Model 24T792 35 cc Lower 24T840 Pump Seal Repair Kit. Includes 24T303 Throat Seal Installation Tool.
Dimensions Dimensions Pump Model A, in. (mm) B, in. (mm) C, in. (mm) D, in. (mm) E, in. (mm) 24T788, 24T789 33.0 (838) 7.375 (187) 8.25 (210) 7.50 (191) 13.375 (340) 24T790, 24T791 34.25 (870) 7.375 (187) 8.25 (210) 7.50 (191) 14.
Technical Data Technical Data Dosing Pumps U.S. Metric 24T788 and 24T790 300 psi 2.1 MPa, 21 bar 24T789 and 24T791 1500 psi 10.5 MPa, 105 bar 100 psi 0.7 MPa, 7.0 bar 85–100 psi 0.6–0.7 MPa, 6.0–7.
Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
