GORMAN-RUPP GHA SERIES Manual de usuario

OM---04621---02

December 15, 1999

Rev. A

TVXY

THE GORMAN-RUPP COMPANY MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

INSTALLATION, OPERATION,

AND MAINTENANCE MANUAL

ROTARY GEAR PUMPS

MODELS

GHA SERIES

PUMPS

TABLE OF CONTENTS

INTRODUCTION PAGE I --- 1...................................................

S A F E T Y --- S E C T I O N A PA G E A --- 1............................................

I N S T A L L A T I O N --- S E C T I O N B PA G E B --- 1.....................................

PUMP MODEL DESIGNATION PAGE B---1..................................................

PREINSTALLATION INSPECTION PAGE B---2................................................

STORAGE PA G E B --- 2....................................................................

Flushing PA G E B --- 2..................................................................

PUMP INSTALLATION PAGE B---3..........................................................

Lifting PA G E B --- 3.....................................................................

Po s i t io n i n g T h e P u m p PA G E B --- 3......................................................

Mounting PA G E B --- 3.................................................................

Piping PA G E B --- 3....................................................................

Gauges PA G E B --- 4...................................................................

Strainers PA G E B --- 4..................................................................

Sealing PA G E B --- 4...................................................................

Valves PA G E B --- 4....................................................................

Barrier Liquids for Dual Mechanical Seals PAGE B---4.....................................

ALIGNMENT PA G E B --- 5..................................................................

C o u p l e d D r i v e s PA G E B --- 5............................................................

V-Belt Drives PA G E B --- 5...............................................................

V-BELT TENSIONING PAGE B---6..........................................................

General Rules of Tensioning PAGE B---6.................................................

Tension Measurement PAGE B---6......................................................

O P E R AT I O N --- S E C T I O N C PA G E C --- 1.......................................

P U M P O P E R A T I O N PA G E C --- 1............................................................

PRE-OPERATION PAGE C---1..............................................................

Before Starting the Pump PAGE C---1...................................................

Checking Pump Rotation PAGE C---1...................................................

STARTING PA G E C --- 2....................................................................

OPERATION PA G E C --- 2..................................................................

L i q u i d Te m p e r a t u r e PA G E C --- 2.........................................................

Overheating PA G E C --- 2...............................................................

Checking Gauges PAGE C---2..........................................................

Strainer Check PAGE C---3.............................................................

Leakage PA G E C --- 3..................................................................

PRESSURE RELIEF VALVE ADJUSTMENT PAGE C---3........................................

Cracking Pressure PAGE C---3.........................................................

Complete By-Pass Pressure PAGE C---3.................................................

STOPPING PA G E C --- 3....................................................................

T R O U B L E S H O O T I N G --- S E C T I O N D PA G E D --- 1...............................

TROUBLESHOOTING WITH GAUGES PAGE D ---1............................................

Vacuum Gauges PAGE D---1...........................................................

Pressure Gauges PAGE D---1..........................................................

TROUBLESHOOTING CHART PAGE D ---2...................................................

PREVENTIVE MAINTENANCE PAGE D---4...................................................

TABLE OF CONTENTS

(continued)

PUMP MAINTENANCE AND REPAIR --- SECTION E PAGE E --- 1.................

PARTS KEY:

Typical GHA Pump (Oil Lubricated Backhead Models) PAGE E---3..........................

ASSEMBLED GHA PUMP MODEL ILLUSTRATION PAGE E---4.................................

P U M P D I S A S S E M B LY PA G E E --- 5..........................................................

Pressure Relief Valve (10) PAGE E---6...................................................

Rotor Adjusting Sleeve (07) PAGE E---6.................................................

Coverplate Kit (11) PAGE E---6.........................................................

Head Kit/Idler Assembly (02) PAGE E ---7................................................

Rotor/Shaft Removal (03) PAGE E---7...................................................

Foot Bracket Kit (08) PAGE E --- 7........................................................

Backhead Kit (06) Disassembly (Std Mech Seal Pump Only) PAGE E---7....................

Backhead Kit (06) Disassembly (Packing Seal or Clamped Seat Seal Pumps Only) PAGE E---8.

Housing Assembly (04) PAGE E---8.....................................................

PUMP REASSEMBLY PAGE E---8..........................................................

Cleaning and Inspection PAGE E---8....................................................

Bushing Preparation PAGE E---9........................................................

Housing Assembly (04) PAGE E---9.....................................................

Backhead Kit (06) Reassembly (Std Mech Seal Pump Only) PAGE E---9.....................

Backhead Kit (06) Reassembly (Packing Seal or Clamped Seat Seal Pumps Only) PAGE E---10

Rotor/Shaft (03) Installation PAGE E---10.................................................

Head/Idler Assembly (02) PAGE E---10..................................................

Coverplate Kit (11) PAGE E---11........................................................

Foot Bracket Kit (08) PAGE E---11.......................................................

Rotor Adjusting Sleeve (07) PAGE E---11................................................

SETTING END CLEARANCE PAGE E---11...................................................

LUBRICATION PA G E E --- 1 2................................................................

R E L I E F VA LV E D I S A S S E M B LY PA G E E --- 1 3.................................................

RELIEF VALVE REASSEMBLY PAGE E---13..................................................

Relief Valve Installation (10) PAGE E --- 14................................................

SEAL APPENDIX --- SECTION F PAGE F ---1.....................................

Standard Type 43 Mechanical Seal PAGE F---1...............................................

Positive Drive Mechanical Seal PAGE F---3...................................................

Modular Metal Bellows Seal (Option 62C) PAGE F--- 5..........................................

Packing Seal (Option 65P) PAGE F---8.......................................................

OM--04621GHA SERIES

PAGE I -- 1

INTRODUCTION

Thank You for purchasing a Gorman-Rupp Rotary

Gear Pump. This manual is designed to help you

achieve the best performance and longest life from

your Gorman-Rupp Rotary Gear pump. Read this

manual carefully to learn how to safely install, op-

erate and repair your pump. Failure to do so could

result in personal injury or damage to the pump.

This manual will alert personnel to known proce-

dures which require special attention, to those

which could damage equipment, and to those

which could be dangerous to personnel. However,

this manual cannot possibly provide detailed in-

structions and precautions for each specific ap-

plication or for every situation that might occur dur-

ing maintenance of the unit. Therefore, it is the re-

sponsibility of the owner, installer and/or mainte-

nance personnel to ensure that applications and/

or maintenance procedures not addressed in this

manual are performed only after establishing that

neither personal safety nor pump integrity are

compromised by such applications or procedures.

In addition to this manual, a separate Parts List is

shipped with the pump. Refer to the Parts List when

ordering parts.

If your pump is furnished with a drive unit, refer to

the drive unit manufacturer’s installation and oper-

ation instructions in the literature accompanying

the pump.

These pumps can transfer a wide range of light,

medium, and heavy viscosity liquids, depending

on design and components. Some models are

not recommended for use with water; others

when fitted with specific options, may be used

with water; consult the factory.

If there are any questions regarding the pump or

drive unit which are not covered in this manual or

in other literature accompanying this unit, please

contact your Gorman-Rupp distributor or the Gor-

man-Rupp Company:

The Gorman-Rupp Company

P.O. Box 1217

Mansfield, Ohio 44901-- 1217

or:

Gorman-Rupp of Canada Limited

70 Burwell Road

St. Thomas, Ontario N5P 3R7

RECORDING MODEL AND

SERIAL NUMBERS

Please record the pump model and serial number

in the spaces provided below. Your Gorman-Rupp

distributor needs this information when you require

parts or service.

Pump Model:

Serial Number:

WARRANTY INFORMATION

The warranty provided with your pump is part of

Gorman-Rupp’s support program for customers

who operate and maintain their equipment as de-

scribed in this and the other accompanying litera-

ture. Please note that should the equipment be

abused or modified to change its performance be-

yond the original factory specifications, the war-

ranty will become void and any claim will be de-

nied.

GHA SERIESOM-- 04621

PAGE I -- 2 INTRODUCTION

The following are used to alert personnel to procedures which require special attention, to those which

could damage equipment, and to those which could be dangerous to personnel:

Immediate hazards which will result in

severe personal injury or death. These

instructions describe the procedure re-

quired and the injury which will result

from failure to follow the procedure.

Hazards or unsafe practices which

COULD result in severe personal injury

or death. These instructions describe

the procedure required and the injury

which could result from failure to follow

the procedure.

Hazards or unsafe practices which COULD

result in minor personal injury or product or

property damage. These instructions de-

scribe the requirements and the possible

damage which could result from failure to

follow the procedure.

NOTE

Instructions to aid in installation, operation, and

maintenance or which clarify a procedure.

GHA SERIES OM--04621

PAGE A -- 1

SAFETY

SAFETY --- SECTION A

This information is specific to Gorman-Rupp GHA

Series Rotary Gear Pumps. It applies throughout

this manual and any manual or literature ac-

companying the pump.

For information on the power unit used to drive this

pump, consult the separate literature accompany-

ing the power unit.

Pumps and related equipment must be in-

stalled and operated according to all na-

tional, local and industry standards.

This manual will alert personnel to

known procedures which require spe-

cial attention, to those which could

damage equipment, and to those which

could be dangerous to personnel. How-

ever, this manual cannot possibly pro-

vide detailed instructions and precau-

tions for each specific application or for

every situation that might occur during

maintenance of the unit. Therefore, it is

the responsibility of the owner, installer

and/or maintenance personnel to en-

sure that applications and/or mainte-

nance procedures not addressed in this

manual are performed only after estab-

lishing that neither personal safety nor

pump integrity are compromised by

such applications or procedures.

Before attempting to install, operate, or

service this pump, familiarize yourself

with this manual, and with all other liter-

ature shipped with the pump. Unfamil-

iarity with all aspects of pump operation

covered in this manual could lead to de-

struction of equipment, injury, or death.

Depending on design and components,

this pump will handle a wide range of

light, medium, and heavy viscosity liq-

uids at a variety of temperatures. Do not

apply at higher temperatures than the

seal will handle. Do not attempt to pump

liquids which may damage the pump or

endanger personnel as a result of pump

failure; consult the factory for chemical

compatibility.

If the pump and motor are furnished

mounted on a base, make certain that all

lifting devices have adequate capacity.

If chains or cables are used in lifting,

make certain that they are positioned so

as not to damage components, and so

that the load will be balanced.

After the pump has been installed, make

certain that the pump and all piping or

hose connections are secure before op-

eration. Loose connections can result in

damage to the equipment and serious

injury to personnel.

Never operate the pump without a pres-

sure relief valve installed on the pump

or in the discharge piping. Make certain

that pump-mounted pressure relief

valves are installed with their adjusting

ends toward the suction port.Ifbi-rota-

OM--04621 GHA SERIES

PAGE A -- 2 SAFETY

tional operation is required, a pressure

relief device must be provided for both

directions of flow. Operation without a

pressure relief valve or with an improp-

erly installed relief valve could cause

the pump to explode, resulting in seri-

ous injury or death to personnel.

Before attempting to open or service the

pump:

1. Familiarize yourself with this man-

ual.

2. Lock out incoming power to the

drive unit to ensure that the pump

will remain inoperative.

3. Allow the pump to completely cool

if overheated.

4. Close the discharge and suction

valve (if used).

An overheated pump can cause severe

burns and injury. If overheating occurs:

1. Stop the pump immediately.

2. Allow the pump to completely cool.

3. Refer to the instructions in this

manual before restarting the

pump.

Do not remove plates, covers, gauges,

pipe plugs or fittings from an over-

heated pump. Vapor pressure within the

pump can cause parts being disen-

gaged to be ejected with great force. Al-

low the pump to completely cool before

servicing.

Do not operate this pump without

guards in place over the rotating parts.

Exposed rotating parts can catch cloth-

ing, fingers or tools, causing severe in-

jury to personnel.

This pump may be used to handle liq-

uids which may cause serious illness or

injury through direct exposure or

emitted fumes. Wear protective cloth-

ing, such as rubber gloves, face mask

and rubber apron, as necessary, before

disconnecting or servicing the pump or

piping.

GHA SERIES OM--04621

PAGE B -- 1

INSTALLATION

INSTALLATION --- SECTION B

Review all SAFETY information in Section A.

Pumps and related equipment must be in-

stalled and operated according to all na-

tional, local and industry standards.

Since pump installations are seldom identical, this

section is intended only to summarize general rec-

ommendations and practices required to inspect,

position, and arrange the pump and piping. If there

are any questions concerning your specific instal-

lation, contact your Gorman-Rupp distributor or

the Gorman-Rupp Company.

Most of the information applies to a flooded suction

installation where liquid is supplied under pres-

sure.

If the pump is positioned above the liquid in a static

lift installation, information such as mounting, pip-

ing configuration and priming must be tailored to

specific conditions.

Thesepumpsarenotrecommendedfor

use with water. Some models may be used

with water when fitted with specific options;

consult the factory.

PUMP MODEL DESIGNATION

Following is a description of the model numbering

system for Gorman-Rupp rotary gear pumps.

Rotary gear pump model numbers include design

style, port size, hydraulic size and construction

code.

Typical Pump Model

GHS 1 1/2 GF 32

Design

Style

Port

Size

Hydraulic

Size

Construction

Code

Design Style: Gorman-Rupp rotary gear pumps

are available in five basic designs:

SG M C --- M e d i u m D u t y --- C o m p a c t

SG M S --- M e d i u m D u t y

SG H C --- H e a v y D u t y --- C o m p a c t

SG H S --- H e a v y D u t y

SG H A --- A b r a s i v e D u t y

Port Size: Gorman-Rupp rotary gear pumps are

available in port sizes from 1 to 6 inches, depend-

ing on the design style. Consult your Gorman-

Rupp distributor or the factory for additional sizes.

Hydraulic Size: The first letter in the hydraulic size

is a rotor diameter code. The second letter indi-

cates tooth length.

Construction Code: Construction Codes for Gor-

man-Rupp rotary gear pumps are as follows:

Code Description

3 Iron w/Mechanical Seal(s)

4Ironw/PackingorLipSeal(s)

9 316 SST w/Mechanical Seal(s)

10 316 SST w/Packing or Lip Seal(s)

32 Steel w/Mechanical Seal(s)

38 Steel w/Packing or Lip Seal(s)

Theoretical Displacement: Table B-1 indicates

theoretical displacement values for each hydraulic

size.

NOTE

Actual capacities and recommended shaft speeds

vary according to application. Consult your Gor-

man-Rupp distributor or the factory for additional

information.

GHA SERIESOM-- 04621

PAGE B -- 2 INSTALLATION

Ta b l e B - 1 . T h e o r e t i c a l D i s p l a c e m e n t

Hydraulic

Size

Theoretical Displacement

Per Revolution

Gallons Centimeters3

DC 0.00568 21.486

DE 0.00704 26.646

GC 0.00967 36.619

GF 0.01405 53.186

GH 0.01915 72.479

GJ 0.02317 87.700

JG 0.03579 135.49

JJ 0.05159 195.28

JL 0.07078 267.94

JP 0.10078 381.48

NK 0.10665 403.71

NM 0.14173 536.51

NP 0.17681 669.31

RM 0.24030 909.65

RP 0.29979 1134.8

RR 0.35927 1360.0

RS 0.41876 1585.1

SR 0.65752 2489.0

SU 1.10240 4173.2

TU 1.91280 7240.7

PREINSTALLATION INSPECTION

The pump assembly was inspected and tested be-

fore shipment from the factory. Before installation,

check for damage which may have occurred dur-

ing shipment. Check as follows:

a. Inspect the pump assembly for cracks, dents,

damaged threads, and other obvious dam-

age.

b. Check for loose attaching hardware. Since

gaskets tend to shrink after drying, check for

loose hardware at the mating surfaces.

c. Carefully read all tags, decals, and markings

on the pump assembly, and perform all duties

indicated.

STORAGE

Due to the extreme close machining toler-

ances within rotary gear pumps, proper

storage before installation is essential to

prevent damage to the pump.

If the pump will not be immediately installed, follow

these procedures or damage to the pump will oc-

cur.

a. Do not flush the pump. Ensure that the port

plugs shipped with the pump remain in place

until piping is installed to help prevent dust or

other foreign objects from entering the pump.

b. Pumps that will not be installed for an ex-

tended period should be stored indoors if

possible. The factory-installed port plugs will

not ensure protection from excessive humid-

ity, splash water or rain. In very humid or wet

conditions, install air-tight plugs in the ports

and fill the pump completely with a lubricating

preservative liquid that is compatible with the

liquid to be pumped.

c. Pumps stored outdoors must be fully pre-

served as described above, completely cov-

ered with plastic or other water-tight material,

and the covering anchored to ensure that it

will not be blown off.

Flushing

Clean piping is essential because of close-

tolerance moving parts in this pump. Flush

all dirt, grit, weld beads or scale from the

suction piping before installing the pump.

Damage to the pump because of debris in

the suction line is not covered by the pump

warranty.

Before shipment, the pump may have been tested

using a petroleum-based preservative. If flushing is

required, do not do so until just before installation;

the test oil protects close-tolerance pump parts

from corrosion.

Most cleaning solvents are toxic and

flammable. Use them only in a well ven-

tilated area free from flame, sparks, and

excessive heat. Read and follow all pre-

cautions printed on solvent containers.

GHA SERIES OM--04621

PAGE B -- 3

INSTALLATION

To flush the pump, use an approved solvent com-

patible with the liquid being pumped. Make cer-

tain that the solvent will not attack pump com-

ponents, particularly seals and gaskets.

PUMP INSTALLATION

Pump dimensions are shown in the separate

Pump Specification Bulletin.

Never operate the pump without a pres-

sure relief valve installed on the pump

or in the discharge piping. Make certain

that pump-mounted pressure relief

valves are installed with their adjusting

ends toward the suction port.Ifbi-rota-

tional operation is required, a pressure

relief device must be provided for both

directions of flow. Operation without a

pressure relief valve or with an improp-

erly installed relief valve could cause

the pump to explode, resulting in seri-

ous injury or death to personnel.

Lifting

Remove suction and discharge hose and piping

before attempting to lift the pump. Use lifting equip-

ment with a capacity of at least five times the total

weight of the equipment being lifted.

Positioning The Pump

Locate the pump as close as possible to the liquid

being pumped. Locating the pump below the liq-

uid source will help self-priming and reduce the

possibility of cavitation.

Mounting

The pump may be shipped alone, mounted on a

base, or with pump and motor mounted on a base.

Install the pump and motor on a base before

mounting the base on a foundation.

Mount the base on a foundation that will provide

permanent, rigid support for the pump, and will be

heavy enough to absorb any vibration, strain or

shock.

Piping

Before establishing suction and discharge lines,

determine pump port positions and rotation. Fig-

ure B---1 shows typical port positions for the stan-

dard 90_housing; if you have selected a 180_

housing port option, your port positions will be dif-

ferent.

Either hose or rigid pipe may be used to make con-

nections. If rigid piping is used, install expansion

joints to protect the pump from vibration and ther-

mal expansion in the piping. Do not use expansion

joints or flexible connectors to adjust misaligned

piping.

Begin piping layout at the pump, and work toward

the source of supply and the point of discharge. If

an obstacle is in the way of a suction or discharge

line, run the piping around the obstruction, not

over it. Running piping over an obstruction will

create an air pocket which will make priming more

difficult.

If possible, slope the piping toward the pump so no

air or liquid is trapped in the piping. If a long hori-

zontal suction line is necessary, install the line be-

low the liquid level whenever possible in order to

keep the piping full of liquid. This will make priming

easier because the pump will not have to remove

as much air in the line.

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