Zenith Pumps B-9000 Gear Pumps ® Installation, Care and Maintenance Zenith Chemical Duty Gear Pumps ®
Thoroughly read and understand this entire manual before installation and operation of pump. ® Zenith In 1926, Zenith Pumps was approached by the synthetic fiber industry to design a pump that would provide precise, pulseless and repeatable flow while ensuring ultimate product quality. The options then were the same as those in the chemical process industry today— diaphragm, lobe, coarse gear, piston, plunger and screw pumps.
Design Zenith’s B-9000 Series precision metering pumps utilize a rotary external spur gear which dispenses an exact volume of fluid per shaft revolution (cc/rev). Precision ground and lapped construction, including alignment dowels, allows for close control of operating clearances. This ensures precise, pulseless and repeatable flow under varying process conditions. Integrated closed loop speed control and a compact motor driver system maintains up to .
Operation (continued) Magnetic Coupling Pumps In normal operation, the magnetic poles of the outer drive magnet remain aligned with the magnetic poles of the inner pump magnet. The motion of the motor is smoothly transferred to the pump shaft. If the torque load on the pump exceeds the magnetic coupling strength, then the outer magnets will rotate past the inner magnets and the magnetic poles will misalign.
Inlet Pressure Loss (psi) = Viscosity(cps) • Displacement(cc/rev) • Shaft Speed(rpm) • [(Specific Gravity • W1)+W2] Table 1 cc/rev 0.3 0.6 1.2 2.4 4.5 9.0 15.0 30.0 45.0 90.0 W1 4.29E-06 1.93E-06 1.21E-06 9.34E-07 3.00E-07 2.24E-07 1.11E-07 8.61E-08 3.38E-08 2.49E-08 W2 2.32E-06 2.47E-06 2.77E-06 3.38E-06 3.46E-07 4.19E-07 7.47E-08 9.28E-08 1.65E-08 2.02E-08 Note: This sizing procedure should be used as a guideline for estimating pump type, pump size and system requirements.
Installation Pumps should always be carefully unpacked and inspected. If any items are missing or damaged, the freight carrier and Zenith should be notified immediately. While the pump is composed of stainless steel, it is a precision instrument. Dropping or hitting the pump with a non-yielding material can cause serious damage to the components. All materials are through-hardened to maximum hardness resulting in a brittle material. Treat them as you would any other precision gaging instrument.
Installation (continued) 2. Before starting, remove all flow restrictions downstream of the pump to allow initial operation with as low a back pressure as possible. 3. Start the pump at the slowest speed possible and, if possible, with a lubricating fluid. Zenith B-9000 pumps must never be run without a fluid. Watch the point of discharge for evidence of fluid. If no discharge is seen after a reasonable length of time, shut down the pump and check for obstructions in the system and proper pump rotation.
Lapping or Blocking To remove nicks, burrs and scour marks from pump parts, place two layers of 400-Grit Emery Cloth on a lapping block or plate. A granite flat is also suitable. Apply light pressure to the part and turn it using a figure 8 motion approximately ten times until a smooth finish appears. Areas that are commonly lapped are the sides of metering gears and the inside faces of front, gear and rear plates. After lapping is completed the parts are ready to be cleaned with a safe industrial solvent.
B-9000 Series Disassembly (continued) the adapter plate to the pump body. Lift the adapter plate off the pump body and retrieve the ORing. 4. Loosen and remove the socket head screws (19) and (20) from the back of the rear plate (7). 5. Remove the rear plate (7). Always use the pry slots to prevent scratching precision tapped surfaces. 6. Remove the gear plate (3), being careful to note the alignment of any markings on the plate. Always use the pry slots to prevent scratching the plates.
.05 - 2.4 cc/rev B-9000 Retaining Ring 16 Key 4 Square Key 17 Interpret per ASME-Y14.5M 1994 Driving Gear 5 19 SHCS M8x1.25 Gear Plate 3 7 Rear Plate 9 Arbor Front Plate 8 2 Drive Shaft 6 Driven Gear 10 Hollow Dowel 13 Type 8-IT Mechanical Seal 11 Seal Housing 21 Dryseal Type Plug 18 SHCS M4x0.7 Diagram 1 4.5 & 9 cc/rev B-9000 Rear Plate Assembly 7 Retaining Ring 16 Round Key 4 Interpret per ASME-Y14.5M 1994 20 SHCS M6x1 Driving Gear 5 19 SHCS M10x1.
15 & 30 cc/rev B-9000 Rear Plate Assembly 7 Retaining Ring 16 Round Key 4 Interpret per ASME-Y14.5M 1994 Driving Gear 5 20 SHCS M6x1 Gear Plate 3 19 SHCS M12X1.75 Grade 12.9 33 Rear Plate Front Plate Assembly 8 34 Sleeve Bearing 9 Arbor Square Key 17 6 Driven Gear 10 Hollow Dowel O-Ring 15 32 Sleeve Bearing 31 Front Plate 2 Drive Shaft 13 Mechanical Seal 11 Seal Housing 18 SHCS M8x1.
B-9000 Series Assembly Use both pages of the assembly drawing during the reassembly process to assure correct orientation of all parts. Considerable care should be taken to prevent wedging or jamming of parts. Never force the parts together. They will drop into place if properly aligned. Note: If the pump will not turn freely after each component is installed, then the last piece installed needs additional attention or replacement.
B-9000 Series Assembly (continued) • Install the ceramic seat into the seal housing (11) with the o-ring of the seat away from the mechanical seal. • Gently slide the seal housing (11) over the drive shaft (2) until the seal housing is in place and lined-up with the bolt holes on the front plate (8). • Install the socket head screws (18) into the seal housing (11) and tighten to the recommended torque. NOTE: On the .05 through 9 cc/rev models, tighten the screws using a crossing pattern.
B-9000 Series Assembly (continued) Screw Torque • Place the larger O-Ring into the exposed face of the adapter plate. Lower the barrier cap into position over the inner magnet. If applicable mount the barrier cap by installing/ tightening the eight socket head screws. Size (Metric Alloy Steel) M4 M6 M8 M10 M12 M16 14. Install the square key (17) into the drive shaft keyway. Recommended Torque (in -lbs)* 31 108 262 519 910 2250 *Lubricated values/if non-lubricated increase by 33%.
FAILURE, IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. WARNING This document and other information from Zenith Pumps, its subsidiaries and authorized distributors provide product and/or system options for further investigation by users having technical expertise.
