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Liquiflo Equipment Co. 443 North Avenue Garwood, NJ 07027 USA Tel 908-518-0666 Fax 908-518-1847
INSTALLATION and MAINTENANCE MANUAL
3 and H-SERIES
ROTOGEARA SEALED PUMPS
TABLE OF CONTENTS
General Instructions
Symbol Explanation
Pump and Motor Installation
Start Up
Special Precautions for various seals
Removal from System
Maintenance and Repair
Pump Disassembly
Section (A)
Section (B)
Section (C)
Section (D)
Section (E)
Trouble Shooting
Packed stuffing box
Lip Seal
Single internal mechanical seal
External mechanical seal
Double mechanical seal
Document No.: 3.20.073
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Summary of Contents for Liquiflo ROTOGEAR H Series
- Page 1 Packed stuffing box Section (B) Lip Seal Section (C) Single internal mechanical seal Section (D) External mechanical seal Section (E) Double mechanical seal Trouble Shooting Document No.: 3.20.073 Liquiflo Equipment Co. 443 North Avenue Garwood, NJ 07027 USA Tel 908-518-0666 Fax 908-518-1847...
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Page 2: General Instructions
GENERAL INSTRUCTIONS This Manual covers the “3” and “H” series Sealed pumps. Upon receipt of your Liquiflo pump verify: The equipment has not been damaged in transit. The pump model number and serial number are stamped on the pump's rear housing. - Page 3 Clean piping as necessary to remove dirt, grit, weld slag, etc. If the Liquiflo pump was delivered as a complete assembly, it was properly aligned at the factory. Alignment should be checked by taking measurements at the coupling. Flexible couplings are not intended to compensate for misalignment.
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Page 4: Removal From System
A packed pump can be run with grease, an external flush, or nothing at all. If grease is used, it should be compatible with the fluid being pumped (i.e. non- soluble and non-reactive). Inject grease into the fitting after removing the drain plug on the opposite side. -
Page 5: Pump Disassembly
The balance of the manual describes the maintenance procedures for the specific type of seal involved. Maintenance for a sealed gear pump is minimal. Periodic lubrication of the packing and tightening of the gland screws and fluid in the double seal loop are the major maintenance items. - Page 6 Remove the keys (23A) and (23B). Remove the bearings (3) and the bearing lock pins (13) from the front and rear housings. Removal is generally accomplished by destroying the bearing. NOTE: When removing the bearings be careful not to damage the bearing bores.
- Page 7 Remove the six housing screws (4) and lockwashers (15) securing the rear housing (2) to the center housing (21). Go to steps 10 and 11 listed above. Section (A) Packed Stuffing Box If the packing leaks excessively, it will have to be replaced. The use of a packing puller will help facilitate the removal of the packing.
- Page 8 Remove all burrs and setscrew marks from drive shaft. Do not remove the seal unless a new replacement seal is available; because the seal's wedge will be damaged upon removal. Do not reuse 0-rings. Section (C) Single Internal Mechanical Seal Remove the mechanical seal (11) from the front housing first by removing the 1/8 inch NPT plug (9) and then loosening the four setscrews which are accessible through the 1/8 inch NPT opening by rotating the pump shaft.
- Page 9 Coat the 1/8 inch NPT plugs (if applicable) with a suitable pipe sealant, install into the front housing and tighten. Section (D) External Mechanical Seal Note: Mechanical seal must be removed first to provide access to the gland plate. The 312 and 314 have no gland plate. Remove the mechanical seal (11) from the drive shaft by loosening the four set screws.
- Page 10 Press assembly into the front housing. Install the mechanical seal with retaining clips onto the drive shaft being careful not to damage the seal's wedge on the keyway. Then remove the retaining clips. Slide the seal into the seal chamber. Remove the drive side seal seat (24) and the seal seat gaskets (18) or O-rings from the gland.
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Page 11: Troubleshooting Guide
Trouble Shooting Guide Problem Possible Cause Remedy Verify suction pipe is submerged Pump not primed Increase suction pressure Open suction valve Reverse motor leads Wrong direction of rotation Reverse suction and discharge piping Valves closed Verify valves are open System pressure higher than No Discharge Bypass valve open relief setting... - Page 12 Problem Possible Cause Remedy Heat fluid to reduce Fluid viscosity higher than viscosity specified Decrease pump speed Excessive power Increase driver horsepower consumption Gear clearances insufficient Purchase gears trimmed for for viscosity the correct viscosity Differential pressure greater Increase pipe diameter than specified Abrasives in fluid Install suction strainer...
- Page 13 Model 31F Chemical Processing Pumps 0.20 1 CPS - Fluid-Water 1750 0.15 1500 1140 0.10 1750 0.05 DIFFERENTIAL PRESSURE (PSI) 0.20 100 CPS - Oil 1750 0.15 1500 1750 1140 0.10 0.05 DIFFERENTIAL PRESSURE (PSI)
- Page 14 Model 33F Chemical Processing Pumps 1750 1 CPS - Fluid-Water 1500 1140 1750 DIFFERENTIAL PRESSURE (PSI) 100 CPS - Oil 1750 1500 1140 1750 DIFFERENTIAL PRESSURE (PSI)
- Page 15 Model 35F Chemical Processing Pumps 1 CPS - Fluid-Water 1750 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI) 100 CPS - Oil 1750 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 16 Model 35R Chemical Processing Pumps 1 CPS - Fluid-Water 1750 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI) 100 CPS - Oil 1750 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 17 Model 37F Chemical Processing Pumps 1750 1 CPS - Fluid-Water 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI) 100 CPS - Oil 1750 1750 1500 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 18 Model 37R Chemical Processing Pumps 1750 1 CPS - Fluid-Water 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI) 30 CPS - Oil 1750 1750 1500 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 19 Model 39F Chemical Processing Pumps 1750 1 CPS - Fluid-Water 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI) 30 CPS - Oil 1750 1750 1500 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 20 Model 39R Chemical Processing Pumps 1750 1 CPS - Fluid-Water 1500 1750 1140 DIFFERENTIAL PRESSURE (PSI) 1750 100 CPS - Oil 1750 1500 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 21 Model 312F Chemical Processing Pumps 1 CPS - Fluid-Water 1140 1140 DIFFERENTIAL PRESSURE (PSI) 100 CPS - Oil 1140 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 22 Model 312R FLOW (LPM) Chemical Processing Pumps 1140 1 CPS - Fluid-Water 1140 DIFFERENTIAL PRESSURE (PSI) FLOW (LPM) 100 CPS - Oil 1140 1140 DIFFERENTIAL PRESSURE (PSI)
- Page 23 Model 314F Chemical Processing Pumps 1 CPS - Fluid-Water 1140 1140 DIFFERENTIAL PRESSURE (PSI) 100 CPS - Oil 1140 1140 DIFFERENTIAL PRESSURE (PSI)