Goulds Pumps AF-LM-LMR User Manual

Pump Safety Tips

Safety Apparel:

• Insulated work gloves when handling hot bearings

or using a bearing heater

• Heavy work gloves when handling parts with sharp

edges, especially impellers

• Safety glasses (with side shields) for eye protection,

especially in machine shop areas

• Steel-toed shoes for foot protection when handling

parts, heavy tools, etc.

• Other personal protective equipment to protect

against hazard/toxic fluids

Coupling Guards:

• Never operate a pump without a V-belt guard

properly installed

Flanged Connections:

• Never force piping to make a connection with a

pump

• Use only fasteners of the proper size and material

• Ensure there are no missing fasteners

• Beware of corroded or loose fasteners

Operation:

• Do not operate below minimum rated flow, or with

discharge valves closed

• Do not open vent or drain valves, or remove plugs

while system is pressurized

Maintenance Safety:

• Always lockout power

• Ensure pump is isolated from system and pressure

is relieved before disassembling pump, removing plugs, or disconnecting piping

• Use proper lifting and supporting equipment to

prevent serious injury

• Observe proper decontamination procedures

• Know and follow company safety regulations

• Never apply heat to remove impeller

• Observe all cautions and warnings highlighted in

pump instruction manual

Safety Definitions

These pumps have been designed for saf e and reliable operation when properly used and maintained in accordance with instructions contained in this manual. A pum p is a pressure containing device with rotating parts that can be hazardous. Operators and maintenance personnel must realize this and follow safety meas ures. Goulds pumps shall not be liable for physical injury, damage or delays caused by a failure to observe the instructions in this manual. The following symbols are used to denote special attention:

Electrical Hazard. Particular care must be taken when electrical power source to the equipment is energized.

Warning. O perating procedure, prac tice etc which, if not c orrect ly followed, could result in personal injury or loss of life

Caution. Operating procedure, practice etc which if not followed could result in dam age or destruction of equipment

ATEX. If equipment is to be installed in a potentially explosive atmosphere and these procedures are not followed, personal injury or equipment damage from an explosion may

FOREWORD

When pumping unit is installed in a potentially explosive atmosphere, the instructions after the Ex symbol

please contact a Goulds representative before proceeding.

This manual provides instructions for the Installation, operation, and maintenance of the Goulds Axial Flow (AF) pump model. This manual covers the standard product. For special options, supplemental instructions are supplied. This manual must be read and understood before installation and start-up.

The design, materials and workmanship incorporated in the construction of Goulds pumps makes them capable of giving long, trouble-free service. The life and satisfactory service of any mechanical unit, however, is enhanced and extended by correct application, proper installation, periodic inspection, condition monitoring and careful maintenance. This instruction manual was prepared to assist operators in understanding the construction and the correct methods of installing, operating, and maintaining these pumps.

Goulds shall not be liable for physical injury, damage or delays caused by a failure to observe the instructions for Installation, Operation, and Maintenance contained i n thi s manual.

Warranty is valid only when genuine Goulds parts are used.

Use of the equipment on a service other than stated in the order will nullify the warranty, unless written approval is obtained in advance from Goulds Pumps, Inc.

Supervision by an authorized Goulds representative is recommended to assure proper installation.

Additional manuals can be obtained by contacting your local Goulds representative or by calling 1-800-446-8537.

THIS MANUAL EXPLAINS

 Proper Installation  Start-up Procedures  Operation Procedures  Routine Maintenance  Pump Overhaul  Trouble shooting  Order Spare or Repair Parts

must be followed. Personal injury and/or equipment damage may occur if these instructions are not followed. If there is any question regarding these requirements or if the equipment is to be modified,

AF (42-66) IOM 3

General Precautions

potentially explosive environment.

Never apply heat to remove impeller. It may explode due to trapped liquid

Never use heat to disassemble pump due to risk of explosion from trapped liquid

Never operate pump without coupling guard correctly installed

Never operate pump beyond the rated conditions to which the pump was sold

Never start pump without proper prime, or proper liquid level in self priming pumps

Never run pump below recommended minimum flow or when dry

Always lock out power to the driver before performing pump maintenance

Never operate pump without safety devices installed

Never operate pump with discharge valve closed

Never operate pump with suction valve closed

Do not change conditions of service without approval of an authorized Goulds representative

Explosion Prevention

In order to reduce the possibility of accidental explosions in atmospheres containing explosive gasses and/or dust, the instructions under the ATEX symbol must be closely followed. ATEX certification is a directive enforced in Europe for non-electrical and electrical equipment installed in Europe. ATEX requirements are not restricted to Europe, and are useful guidelines for equipment installed in any

Special ATEX considera ti ons

All installation and operation instructions in this manual must be strictly adhered to. In addition, care must be taken to ensure that the equipment is properly maintained. This includes but is not limited to:

1. monitoring the pump frame and liquid end temperature

2. maintining proper bearing lubrication

3. ensuring that the pump is operated in the intended hydraulic range

AF (42-66) IOM

ATEX Identification

Temperature in Celsius

For a pumping unit (pump, seal, coupling, motor and pump accessories) to be certified for use in an ATEX classified environment, the proper ATEX identification must be present. The ATEX tag will be secured to the pump or the baseplate on which it is mounted. A typical tag will look like this:

II 2 G/D X The CE and the Ex designate the ATEX compliance. The code directly below these symbols reads as follows:

II ------------ Group 2

2 ------------- Category 2

G/D ------------ Gas and Dust present

X ------------ Temperature class, can be T1 to T6 (see following table)

Maximum Process Temperature to achieve desired T rating

T Rating per EN 1127-1 Maximum Surface

450 410

300 260 200 165 135 100 100 65

Maximum Process

The code classification marked on the equipment should be in accordance with the specified area where the

equipment will be installed. If it is not, please contact your ITT/Goulds representative before proceeding.

85 50

Intended Use

The ATEX conformance is only applicable when the pump unit is operated within its intended use. All instructions

within this manual must be followed at all times. Operating, installing or maintaining the pump unit in any way that is

not covered in this manual can cause serious personal injury or damage to the equipment. This includes any

modification to the equipment or use of parts not provided by ITT/Goulds. If there is any question regarding the

intended use of the equipment please contact an ITT/Goulds representative before proceeding.

AF (42-66) IOM 5

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AF (42-66) IOM

Page

SAFETY

GENERAL INFORMATION

INSTALLATION

OPERATION

PREVENTATIVE MAINTENANCE

DISASSEMBLY & RE-ASSEMBLY

Section

AF (42-66) IOM

SPARE PARTS

APPENDIX 1

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AF (42-66) IOM

SAFETY

! ! !

DEFINITIONS ................................................................................................... 9

GENERAL PRECAUTIONS.............................................................................. 9

DEFINITIONS

Axial flow pumps are pressure-containing devices with rotating parts that can be hazardous. It has been designed for safe and reliable operation when properly used and maintained in accordance with instructions contained in this manual. It is not to be operated at speeds, working pressures, discharge pressures, or temperatures higher than, nor used with liquids other than stated in the original order acknowledgement, without written permission of ITT Industries, Gould’s Pumps, Inc. Operators and maintenance personnel must realize this and follow safety measures. ITT Industries, Gould’s Pumps, Inc. shall not be liable for physical injury, damage or delays caused by a failure to observe the instructions in this manual.

Throughout this manual, the words Warning, Caution, and Note are used to indicate procedures or situations which require special operator attention:

WARNING

Warning is used to indicate the presence of a hazard which can cause severe personal injury, death or substantial property damage if the warning is ignored.

CAUTION

Caution is used to indica te the presence of a hazard which will or can cause minor personal injury or property damage if the warning is ignored.

NOTE: Operating procedure, condition, etc. that is essential to observe.

EXAMPLES

WARNING

Pump shall never be operated without V-belt or coupling guard installed correctly.

CAUTION

Obstructions to flow or pipe fowling may cause cavitation and pump damage.

NOTE: Proper alignment is essential for long pump life.

GENERAL PRECAUTIONS

WARNING

Personal injury will result if procedures outli n ed in this manual are not followed.

• Never apply heat to remove the impeller. It may

explode due to trapped liquid.

• Never use heat to disassemble pump due to risk of

explosion from trapped liquid.

• Never operate pump without V-belt or coupling

guard correctly installed.

• Never operate pump beyond the rated conditions

to which the pump was sold.

• Never start pump without proper prime (sufficient

liquid in pump casing).

• Never run the pump < 75% or > 115% of the Best

Efficiency Point (B.E.P.), AF pumps are unstable in these regions.

• Always lock out power to the driver before

performing maintenance.

• Never operate pump without safety devices

installed.

• Never operate pump with suction valve closed.

• Never operate pump with discharge valve closed.

• Do not change conditions of service without

approval of an authorized Gould’s representative

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AF (42-66) IOM

GENERAL INFORMATION

GENERAL .................................................................................................... 11

PUMP DESCRIPTION .................................................................................. 11

NAME PLATE INFORMATION .................................................................... 12

RECEIVING THE PUMP .............................................................................. 13

INSTALLATION AND OPERATION CHECKLIST ........................................ 13

GENERAL

This instruction manual is intended to assist those involved with the installation, operation and maintenance of Gould’s pumps. It is recommended that this manual be thoroughly reviewed prior to installing or performing any work on the pump or motor.

The design, material and workmanship incorporated into the construction of Gould’s pumps makes them capable of giving long, trouble-free service. The life and satisfactory service of any mechanical unit, however, are enhanced and extended by periodic inspection and careful maintenance. Keep this

instruction manual handy for reference. Further information can be obtained by contacting Gould’s Pumps, Ashland Operations, East Centre St., Ashland, PA 17921 or your local representative.

Gould’s Pumps will not be liable for any damages or delay caused by failure to comply with the provisions of this instruction manual. This pump is not to be operated at speeds, working pressures, discharge pressures, or temperatures, nor used on liquids other than stated in the original order acknowledgment without written permission of Gould’s Pumps.

PUMP DESCRIPTION

The AF pump generates flow by the thrust or lift action of the rotating axial vanes of the impeller. It provides high flow rates and low heads which are ideal for re-circulation, evaporator, and generator cooling systems. The AF utilizes an elbow to direct the flow through the suction and out the discharge end of the pump. The pump accommodates top or end suction configurations using either the LMR or LM bearing arrangement. The LMR is for top suction and the LM is for end suction. Arrangements are as follows:

Power Inboard Outboard End Bearing Bearing

LMR Spherical roller Spherical thrust/spacer/Spherical roller LM Spherical roller Spherical roller/spacer/Spherical thrust

Elbow – AF elbows are fabricated with 150# flat face suction and discharge flanges. They come with fabricated feet for mounting to a sub-base or without feet to be mounted directly in the piping. The elbows have a built in stuffing box and a rear flange for mounting the power end to the elbow. There are also adjusting lugs for aligning the shaft to the stuffing box.

Casing – The AF comes with a casing or spool piece to simplify impeller installation and alignment. The casing bolts to the elbow and shrouds the impeller. It has a gasket or o-ring seal between it and the elbow. Adjusting lugs on the elbow center the casing relative to the impeller.

Power End - The power end is made up of the bearing housing, bearings, locknuts, lock washers, labyrinth oil seals, shaft, shaft sleeve (w/packing), oil slinger, keys, shaft, and shaft washer.

Stuffing Box – The stuffing box is integral with the elbow and provides a mounting surface for a mechanical seal or cylindrical bore with flush ports and gland face for packing. The standard packed box includes (5) rings of packing and (2) lantern rings to seal the shaft area. (2) flush ports are provided for lubrication. The innermost flush port is used with process flow and the outermost port for water flush. A special alternate packing arrangement is available that includes a throat bushing and additional ring of packing near the gland (see the attached addendum). A gland is used for packing adjustment.

AF (42-66) IOM 11

Shaft Sleeve – If packing is specified, a replaceable wear sleeve is provided with the power end. The sleeve is keyed to prevent rotation. The stuffing box can also be modified to accept a mechanical seal if required.

Impeller - The impeller is cast with (4) fixed vanes at 0 or +5 degrees, CW or CCW rotation, and top or end suction. The impeller bore is stepped for easy assembly to the shaft. It is held in place with a key, shaft washer, and bolts. It has a cover plate and o-rings to prevent corrosion and allow for easy impeller replacement. The impeller is dynamically balanced (two plane) per ISO 1940 to a quality grade G-16.

Shaft – The shaft is cantilevered into the elbow to eliminate the need for internal bearings. It is sized for minimal deflection, high critical speed, and extreme corrosion resistance. The shafts are stepped for easy assembly with the impeller. The shaft comes with a replaceable sleeve when used with stuffing boxes.

Bearings - The inboard radial bearing absorbs shaft radial loads and aligns the pump shaft. It is a spherical roller bearing. The outboard thrust bearing absorbs impeller thrust loads and comes as either back-to-back angular contacts or a single taper roller bearing, depending on pump size. Lubrication is by flood oil or grease, depending on customer requirements.

Oil-Cooling (Optional ) – An oil-cooling coil is available on all sizes, it is installed in the bottom of the bearing housing and circulates water to cool the oil bath. Generally, it is used when process temperatures cause excessive heat build up in the bearing housing and/or bearings.

Configurations and Drives – The 42”, 1200mm, 54”, 60”, and 66”pumps are usually gear driven and come on a subbase as standard. They can also be pipe mounted with a drive shaft to a motor on a separate subbase.

NAMEPLATE INFORMATION

Every Gould’s pump has a nameplate that provides information about the pump, including hydraulic characteristics. The nameplate for the AF is located on the bearing housing. Note the format of the pump size: Discharge X Suction - Impeller Diameter in inches or

millimeters (Example 42” X 42”-42” or 1200mm X 1200mm-1200mm, see Fig. 1). When ordering spare parts you will need to identify pump model, size, serial number, and the item number of required parts. Information can be found in this manual.

12 AF (42-66) IOM

COMPLETE

INITIAL

DESCRIPTION

PAGE NO.

Manual read and understood

1~54

Level foundation

Level subbase

Check motor rotation ---CW _____ ---CCW _____

Component rough alignment complete

21~26

V-belt tension and alignment per drive mfgr.

21,22

Coupling alignment per cplg mfgr.

Piping installed and alignment rechecked

19, 20

Mech. seal adjusted per mfgr.

Mfgrs Mnl

Seal flush lines connected

Impeller alignment and clearance set ______ Inch/Side

Pump shaft-free turning

Bearing lubrication

30, 38

V-belt or coupling guards installed

9, 22,30

Motor electrical connections

Mfgrs Man’l

RECEIVING THE PUMP

Inspect the pump as soon as it is received. Carefully check that everything is in good order. Make notes of damaged or missing items on the receipt and freight bill. File any claims with the transportation company as soon as possible.

STORAGE REQUIREMENTS

Short Term: (Less than 6 months) Gould’s normal packaging is via a skid. It is designed to protect the pump during shipping only. Upon receipt, store in a covered and dry location.

Long Term: (More than 6 months) Gould’s longterm packaging via crating. Preservative treatment of bearings and machined surfaces is required. Rotate the shaft several times every 3 months. Refer to drive manufacturer's instruction manual for their long-term storage procedures. Store in a covered dry location

Note: Long-term storage treatment can be purchased with initial p u mp order.

UNCRATING/DE-SKIDDING

Care should be taken when uncrating or de-skidding pumps. If shipment is not delivered in proper order, and in accordance with the bill of lading, note the damage or shortage on both the receipt and freight bill. Make any claims to the transportation company promptly. Instruction books and sheets are included in the shipment - DO NOT DISCARD.

LIFTING THE PUMP/SUB-BASE

WARNING

Pump and components are heavy. Failure to properly lift and support equipment could result in serious physical injury or damage to pumps.

Use care when moving pumps. Lifting equipment must be able to adequately support the entire assembly. Lift assembled unit by the lifting holes found in the sub-base. If the motor, sheaves, and guard are in place, be sure that the lifting cable or chain clears these components. If necessary remove the guard or use a spreader bar to prevent damage. In case the motor ships separate use the eyebolts or lifting lugs found on the motor to hoist it into place on the sub-base.

INSTALLATION AND OPERATION CHECKLIST

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14 AF (42-66) IOM

Equipment that will operate in a potentially accordance with the following instructions.

All equipment being installed must be

maintenance purposes.

INSTALLATION

PREPARATION FOR INSTALLATION ........................................................ 15

LOCATION/FOUNDATION .......................................................................... 15

SUB-BASE LEVELING ................................................................................ 16

CONNECTION OF PIPI NG .......................................................................... 19

PIPE HUNG INSTALLATION ....................................................................... 21

DRIVE ALIGNMENT PROCEDURES .......................................................... 22

IMPELLER ALIGNMENT ............................................................................. 27

ROTATION CHECK ..................................................................................... 29

PREPARATION FOR INSTALLATION

AF units are usually shipped completely assembled. Check all bolts and nuts on the entire unit and make sure they are securely tightened. If necessary, install and adjust drive components per manufacturer’s recommendations

explosive environment must be installed in

properly grounded to prevent unexpected static electric discharge. If not, a static electric discharge may occur when the pump is drained and disassembled for

AF pump shall be located in a clean, dry area free from flooding. The area should provide adequate space for operation, maintenance, inspection and repair, considering complete disassembly and handling of equipment. The pump should have a supply of clean liquid for packing or mechanical seal lubrication. The pump should be positioned to provide the most efficient pipeline system.

The AF pumps covered by these instructions may be designed to hang in the piping system, furnished with spring loaded sub-base bolts, or have a sub-base designed to be anchor bolted and grouted to the foundation.

The foundation must be substantial enough to absorb any vibration and form a permanent, rigid support for the pumping unit to the degree that there shall not be any adverse movement or settling over a long period of time.

Foundations for anchor bolted and grouted sub-bases are typically concrete with anchor bolts cast in to secure the pump.

LOCATION/FOUNDATION

The most commonly used foundation bolts are the sleeve-type (Fig 2 and J type Fig. 3)

AF (42-66) IOM 15

SHIMS OR WEDGES

Both designs permit movement for final bolt adjustment. Anchor bolts should be located in the concrete by a template dimensioned from the pump installation drawing. The top of the sleeve-type bolt should be temporarily sealed with waste material to prevent concrete from entering during the concrete pouring operation. Foundation bolts are located according to the bolt hole dimensions shown on the installation drawing. Bolt size is based on hole size, they should be 1/8” to ¼” under the sub-base hole size. For information on spring mounted sub-bases, see the following section under spring mounted bases.

SUB-BASE LEVELING

GROUTED BASE

When the unit is received with the pump and driver mounted to the sub-base, it should be placed on the foundation and the coupling halves or V-belts disconnected (Fig. 4). The coupling should not be reconnected until all realignment operations have been completed. A recommended coupling alignment procedure is included in the following sections.

Fig. 4

Fig. 5

1. The sub-base should be supported on rectangular metal blocks or on metal wedges having a slight taper. There should be support blocks or wedges on both sides of each foundation bolt. A gap of about 3/4" to 1-1/2' should be allowed between the sub-base and the foundation for grouting (Fig. 5).

2. Adjust the metal supports or wedges until the shafts of the pump and driver and sub-base are level. Check the coupling faces, as well as the suction and discharge flanges of the pump, for horizontal and vertical position by means of a level. Check also for any internal rubbing in the pump. Correct, if necessary, by adjusting the supports or wedges under the sub-base as required. In most cases, factory alignment will be regained by shimming under the sub-base alone. Provisions must be made to support the discharge piping independently from the pump to prevent excessive loads and maintain pump-driver alignment.

3. The sub-base should be level to within .125 in. (3 mm) over the length of the base and .0875 in. (1.5 mm) over the width of the base. Bases anchored with conventional foundation bolts use shims on both sides of the anchor bolts to level the base. The bolts which secure the pump sub-base to the foundation should be 1/8” – 1/4” less in diameter than the holes in the sub-base (hole size is shown on the certified installation drawing).

4. Clean outside areas of sub-base that will contact grout. Do not use oil-based cleaners because grout will not bond to it. Refer to grout manufacturer's instructions.

5. Build a dam around foundation and thoroughly wet the foundation (Fig. 6).

16 AF (42-66) IOM

Fig. 10

SPRING POCKETS

Fig. 8

BOLT

BASEPLATE

GROU

DAM

GROUT

FOUNDATION

Fig. 6

BOLT

BASEPLATE

DAM

GROUT

FOUNDATION

Fig. 7

SPRING MOUNTED BASE

Fig. 8 shows a V-belt driven AF pump on a spring mounted sub-base. Sub-bases supported by spring pockets assure that the pump remains level, regardless of vertical movement due to thermal pipe expansion during operation.

6. Pour grout through the grout holes in the sub-base, up to level of dam. Remove air bubbles from grout as it is poured by puddling, using a vibrator, or pumping the grout into place. Non-shrink grout is recommended.

7. Allow grout to set.

8. Fill remainder of sub-base with grout. Remove air as before (Fig. 7)

9. Allow grout to set at least 48 hours.

10. Tighten foundation bolts.

Fig. 8

The following is a brief description of the spring pocket components and their function (see Fig. 9). The adjusting screw is used to compress or relax the spring. Turning the screw causes the adjusting screw nut assembly to move vertically and change the amount of force the spring exerts against the spring retainer, which is fastened to the sub-base. The stop nut is to limit the vertical up motion of the sub-base in case part of the load is removed from the pump unit

AF (42-66) IOM 17

Fig. 9

1/16”

FLANGE BOLTS

BLOCKS

Spring Size

Wire Size

Spring Rate

Adjusting Screw Size

Load Change per Full Turn

.812”

1140 #/in.

1-1/2”-6 UNC

190 #

.750”

760 #/in.

1-1/2”-6 UNC

127 #

.532”

560 #/in.

1-1/2”-6 UNC

93 #

1.00”

1000 #/in.

2”-4-1/2 UNC

222 #

.375”

133 #/in.

¾”-10 UNC

13 #

Table 1

when the system is cold. The jam nut keeps the stop nut from turning during normal operation when the subbase has been pushed down from the thermal expansion. The adjusting screw holder is a bearing surface for the end of the adjusting screw and serves to hold the end of the screw in a fixed location. The adjusting screw was lubricated at the factory but should be re-lubricated with heavy protective grease during the pump installation. The springs and other parts should be coated with an agent to protect the surface from corrosion, and a heavy lubricant should be applied to the adjusting screw holder pocket.

The following steps are used to set the springs and level the sub-base:

1. Place blocks under the sub-base, near each spring holder, and position the sub-base level on the blocks. A small gap (approx. 1/16" or 1.6 mm) should exist between the flange of the vertical pipe and the pump elbow with the gasket in place (Fig. 10).

allow the required horizontal motion without having the adjusting screw nut assembly hit the walls of the spring holder. Make sure there is sufficient clearance between the adjusting screw holder and the bottom of the sub-base for vertical thermal expansion, this clearance is usually shown on the pump installation drawing.

NOTE: Each spring carries a share of the unit load but generally do not carry equal loads. Each holder has a small "window” to check the spring coil spacing, which is an indication of the relative load on the spring. The ins tallation drawing may indicate the approximate number of turns required for each spring loca tion, especially if the unit uses more than (4) springs. If necessary refer to table 1 for spring rate information.

4. Turn the adjusting screws until the bottom of the sub-base just clears each block. Next adjust each screw evenly until the pump flange and gasket are less than 1/32” (0.8 mm) away from the pipe flange. Careful adjustment is necessary to keep the pump level and obtain better weight distribution on the springs. After the springs have been loaded and adjusted, the base should be off the support blocks and level.

5. Check the alignment of the impeller and the pump elbow. If necessary, correct the alignment by adjusting the springs or by using shims.

NOTE: If the flange gap is over 1/32” (0.8 mm), turn the adjusting screws a uniform amount to close the gap. For a gap of 1/32” (0.8 mm) or less, omit this step.

Fig. 10

2. Install several flange bolts to help maintain alignment of the flanges.

6. Tighten the vertical pipe flange bolts, recheck the alignment and connect the horizontal pipe flange to the elbow. The pump unit should be level and there should not be any rubbing of the impeller in the elbow when the shaft is turned by hand.

WARNING

Do not tighten bolts.

3. Position the adjusting screw holders, while the adjusting screw end is seated in the hole, in the direction of the horizontal thermal expansion. This will

18 AF (42-66) IOM

Never draw piping into place by

damage to the equipment.

7. Run each stop nut down to make light contact with the spring retainer. Lock in place by turning the jam nut down tight against the stop nut.

8. Inspect each spring holder to check the gap between the coils of the spring. There must be enough total gap to accommodate the downward thermal expansion of the system without having them compressed solid.

NOTE: Pumps with oil lubrication should be checked for oil level while thermal expansion is taking place. It may be necessary to add oil to the bearing housing to provide the proper oil level to the higher bearing. A line parallel with the subbase deck through the pr o p er oil level line will show the correct level at the highest end of the bearing housing. A hori zontal line back from that point will establish the proper level mark on the sight gauge.

The system should be operated at normal temperature before the adjusting screw holders are grouted in place. Some customers operate their units with the adjusting screw holders ungrouted. If it becomes necessary to remove a spring assembly from a spring pocket, for safety the following steps should be strictly adhered to:

1. Make sure the spring is relaxed. If the spring

cannot be relaxed with the adjusting screw, the safest method is to pry off the Plexiglas cover and cut the coils using a torch.

2. Remove the bolts or cap screws, which fasten

the spring retainer to the holder and lift out the entire assembly.

3. When the pump is connected to the system and a spring is removed, there should be support under the sub-base near the spring location until the spring has been replaced and adjusted. Distortion of the subbase will affect the pump alignment, and the weight of the components is more likely to cause distortion when the pump is connected to the rigid pipe system.

4. If a spring is replaced while the system is hot, the stop nut should not be set until the system is cold. The springs must be allowed to push the base back to its cold position. An optional grease filled spring pocket is shown in figure 11. The difference between the standard pocket and the grease filled pocket is the addition of a grease fitting and grease seal. Adjustment and setting of the grease filled pocket are identical.

Fig. 11

GENERAL

forcing at the flanged connections of the pump. This may impose dangerous strains on the unit and cause misalignment between pump and driver. Pipe strain will adversely effect the operation of the pump resulting in physical injury and

Guidelines for piping are given in the “Hydraulic Institutes Standards” available from: Hydraulic Institute, 30200 Detroit Road, Cleveland OH 441451967 and must be reviewed prior to pump installation.

AF (42-66) IOM 19

CONNECTION OF PIPI NG

WARNING

Never draw piping into place by forcing at the flanged connections of the pump. This may impose dangerous strains on the unit and cause misalignment between the pu m p and driver. Pipe strain will adversely affect the operation of the pump resulting in physical injury and damage to the equipment.

1. All piping must be supported independently of, and line up with the pump flanges.

2. Piping runs should be as short as possible to minimize friction losses

3. DO NOT connect piping to the pump until the pump and driver hold-down bolts have been tightened.

4. It is suggested that expansion loops or joints be properly installed in suction and /or discharge lines when handling liquids at elevated temperatures, so linear expansion of piping will not draw pump out of alignment.

5. The piping should be arranged to allow pump flushing prior to removal of the unit on services handling corrosive liquids.

6. Carefully clean all pipe parts, valves and fittings, and pump branches prior to assembly.

SUCTION AND DISCHARGE P IPING

WARNING

NPSHA must always exceed NPSHR as shown on Goulds performance curves received with order. (Reference Hydraulic Institute for NPSH and pipe friction values needed to evaluate suction piping

Properly installed suction piping is a necessity for trouble-free pump operation. Suction piping should be flushed BEFORE connection to the pump.

1. Use of elbows close to the pump suction flange should be avoided. There should be a minimum of 2 pipe diameters of straight pipe between the elbow and suction inlet. Where used, elbows should be long radius.

2. Use suction pipe one or two sizes larger than the pump suction, with a reducer at the suction flange. Suction piping should never be of smaller diameter than the pump suction.

3. To prevent suction cavitation, horizontal reducers should be eccentric with the sloping side down and concentric for vertical applications.

5. Pump must never be throttled on suction side.

7. Separate suction lines are recommended when more than one pump is operating from the same source of supply.

Suction lift conditions

1. Suction pipe must be free from air pockets.

2. Suction piping must slope upwards to pump.

3. All joints must be airtight.

Suction head/Flooded suction conditions

1. An isolation valve should be installed in the suction line at least two pipe diameters from the suction to permit closing of the line for pump inspection and maintenance.

2. Keep suction pipe free from air pockets.

3. Piping should be level or slope gradually downward from the source of supply.

4. No portion of the piping should extend below pump suction flange.

5. The size of entrance from supply should be one or two sizes larger than the suction pipe.

6. The suction pipe must be adequately submerged below the liquid surface to prevent vortices and air entrainment at the supply.

Discharge piping

1. Isolation and check valves should be installed in discharge line. Locate the check valve between isolation valve and pump, this will permit inspection of the check valve. The isolation valve is required for priming, regulation of flow, and for inspection and maintenance of pump. The check valve prevents pump or seal damage due to reverse flow through the pump when the driver is turned off.

2. Increasers, if used, should be placed between pump and check valves.

3. Cushioning devices should be used to protect the pump from surges and water hammer if quickclosing valves are installed in system.

Final Piping Check

1. Rotate shaft several times by hand to be sure that there is no binding and all parts are free.

2. Check alignment, per the impeller alignment procedure outlined on pg. 28 to determine absence of pipe strain. If pipe strain exists, correct the piping.

20 AF (42-66) IOM

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Goulds Pumps AF-LM-LMR User Manual

Explosion Prevention

Special ATEX considera ti ons

ATEX Identification

Intended Use

TABLE OF CONTENTS

PUMP DESCRIPTION

NAMEPLATE INFORMATION