Agitator User Manual

www.gnsolidscontrol.com

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GN Mud Agitator Installation, Operation & Maintenance Manual

Company name: GN Solids Control Co., Ltd.

Website: http://www.gnsolidscontrol.com

Address: No.3 Industry Road, Dachang Chaobai River

Development Area, Langfang, China.

Zip Code: 065300

E-mail: [email protected]

[email protected]

Tel: +86-316-5276988 / 5276989 / 5276990

Fax: +86-316-5276997 / 5276990

http://www.gnsolidscontrol.com/�


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Content

1. Overview

2. Safety instructions

3. Application, structure & features

Application

Features

4. Structure and operation principle

Major components

Drive Motor

Gear Drive

5. Model selection and installation

Sizing

Installation

Leveling

Gearbox mounting plate

Shaft assembly

Impeller assembly

Motor and gearbox assembly and installation

Gearbox and impeller coupling connection

Gearbox lubricant level

6. Electrical connections

7. Storage & handling

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8. Machine start up & shutdown

Initial startup

Normal startup and operation

Normal shutdown procedure

Emergency shutdown

9. Maintenance

General

Routine maintenance

10. Troubleshooting

11. Recommended spare parts

12. Terms of warranty


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1. Overview

This manual provides installation, operation, and maintenance instructions for GN mud

agitators. The manual is divided into several parts to assist the user inreadily accessing the

information.

Personnel responsible for transporting, installing, commissioning, operating, or performing

maintenance on this equipment are required to read and understand the instructions

provided in this manual. One copy of this manual should be available and accessible at the

equipment location.

For machine safety and performance, no additions and/or changes may be made to the

equipment without the explicit written permission of GN Solids Control. Genuine GN

repair/replacement parts are required。

Fig. 1-1: GN agitator (Welding type impeller)


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Fig.1-2 GN agitator（Casting type impeller）

2. Safety instructions

All persons responsible for operation and maintenance of this equipment must read and

understand all safety information in this manual prior to operating and/or maintaining the

equipment. The safety warnings listed below are included in applicable procedures

throughout this manual.

a. While operating agitator without/with load, add qualified lubricating oil to required oil

level into worm gearbox.

b. To ensure proper balance and orientation when unit is raised and prevent damage to

components, attach lifting sling only between motor and gear drive. Do not attempt Lifting

by attachment to eyebolt on motor or any other Location.

c. Be sure that handling devices have sufficient lifting capacity to safely handle the weight

of the equipment.

d. Clarify the correct direction of agitator before usage.

e. To avoid serious personal injury of un-expected motor startup, be sure equipment is

locked out, tagged out, and de-energized prior to install / or maintenance and/or

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adjustments.

DO NOT operate the equipment if defective or faulty mechanical or electrical components

are detected.

3. Application, structure & features

Application

GN JBQ series mud agitator is one of the important equipment for mud system. It is

mainly used for agitating drilling fluids, avoid particle in fluids deposit to tank bottom.

It is high-efficiency mud-mixing units offered in a wide array of custom sizes and

configurations to accommodate virtually any mud tank. The horizontal drive is designed

for installations having limited space above the mud tank.

The mud agitator stirs mud slurry to maintain suspension of solids. The agitator is mounted

on top of the mud tank and has one or two impeller(s) immersed in the mud slurry. The

impeller shaft is directly coupled to an electric drive motor that is available in several

horsepower ratings from 7.5 to 25.

GN does not authorize any other use of this equipment, intended usage of the equipment

includes compliance with the operating, maintenance, and safety instructions provided in

this manual。

Mud agitator design should be based on tank dimension, inner depth and mud condition.

GN horizontal agitators utilize worm gear reducer. Welding type or casting type impeller

for option.

The impeller is fixed to the shaft with bolts to avoid rotating or sway (connection with key

groove optional). Its vertical location on the shaft is determined as a height from the tank

bottom corresponding to the impeller diameter times 0.75. For example, a 20” impeller

should be mounted 15” above the bottom. GN recommends straight impeller blades for


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tanks under 5’ deep and canted blades for deeper tanks. If dual impellers are desired,

straight blades are mounted on the bottom and the canted blade impeller is installed at a

point about two-thirds above the tank bottom.

The keyed motor and driven impeller shafts are rigidly connected by a multi-piece

coupling, which uses tapered locking bushings to secure the shafts together. Shaft lengths

are customized to suit customer specifications. For shafts longer than 8’, a stabilizer is

mounted on the tank bottom to support the lower end of the shaft.

Features

a. Utilize worm gear reducer. Compact design, perfect joggle and reliable operation.

b. Worm gear reducer combined with explosion-proof motor, which enable stable

performance in wild severe environment.

c. Input shaft of explosion-proof motor are connected to gearbox with elastic coupling

directly, rather than belt-drive. It enables stable speed of impeller.

d. The mud agitators are high-efficiency mud-mixing units offered in a wide array of

custom sizes, and configurations to accommodate virtually any mud tank. It is to avoid

over-load of current during start up motor.

e. Horizontal type of motor. It is convenient for installation, adjustment or replacement.

Main parameters of agitator

Model JBQ5.5 JBQ7.5 JBQ11 JBQ15

Motor power 5.5kw(7.5hp) 7.5kw(10hp) 11kw(15hp) 15kw(20hp)

Impeller speed 60/72RPM 60/72RPM 60/72RPM 60/72RPM

Single-layer impeller, welding type (Standard)

850mm 950mm 1050mm 1200

Double- layer impeller, welding type

N/A Up:800mm Down:800mm

Up:850mm Down:850mm

Up:950mm Down:950mm


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(Standard)

Casting type impeller, (Standard)

600mm 700mm Up:600mm Down:600mm

Up:700mm Down:600mm

Ration 25:1 25:1 25:1 25:1

Overall dimension (L*W*H)

900*700*600mm

900*750*610mm 1100*840*705mm

1200*1000*760mm

Electric Specs 380V/50HZ Or 460V/60HZ, or customized

Shaft length and impeller

Customized shaft according to tank inner depth / mud condition optional

Remarks Explosion-proof motor Shaft stabilizer available Customized impeller diameter available

4. Structure and operation principle

Major components

GN mud agitator is made of explosion-proof motor, worm gear reducer. impeller,

mounting plate, elastic coupling, and rigid coupling. Explosion-proof motor and worm gear

reducer installed on mounting plate. Elastic coupling connect explosion-proof motor input

shaft and gearbox input shaft. Impeller shaft and gearbox output shaft are connected by

rigid coupling.

Although the arrangement mud agitator components is identical across the various sizes

and configurations, the drive motor, impeller, shaft length and diameter, gear drive, and

motor orientation vary between models. Figure 2 shows the typical components of a mud

agitator. The configuration for the same power rating is identical, except for the type of ear

drive. The unit is shipped unassembled and requires assembly by a trained, qualified

technician.

No Items Series No. Specs Qty Remarks 1 Motor & worm

gear reducer GNJBQ150-01 Assembly

unit 1


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component 2 700mm impeller GNJBQ110-02 ZG35# 1 3 Impeller

installation nut LM1400048S1 SUS316 2

Impeller installation spring washer

TD1400048S1 SUS316 8

Impeller installation flat washer.

PD1400048S1 SUS316 8

Impeller installation bolt

LS1414048S1 SUS316 8

4 Shaft GNJBQ055-03 Assembly unit

1

5 Shaft installation bolt

LS1407048S1 SUS316 6

6 Stabilizer GNJBQ055-04 SUS316 1

Fig.2: Main components of agitator

Drive Motor

The mud agitator is operated by a 3-phase induction motor. Drive motors range from 7.5 to


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25 horsepower with customized hz and voltage; the power requirements are specified on

the customer order. Electric power, switching, and safety devices are provided by the

customer.

GN can offer starter for agitator as request. All components come from Siemens of

Schneider.

Gear Drive

Rotation of the drive motor is transferred to the impeller shaft through the directly coupled

gear drive. The drive is a reduction gearbox and is factory assembled to the drive motor.

The drive is sized to apply the maximum torque required to produce the design impeller

rotation speed of 60 rpm under 50hz, and 72 rpm under 60hz.

Impeller

Impellers are available in diameters ranging from 20” to 52” to meet the needs of various

size mud tanks. The impeller diameter is generally determined by the size of the tank.

Larger or deeper tanks employ dual impeller units having a secondary impeller mounted

closer to the mud surface. The impeller is mounted on the shaft using a tapered locking

bushing. A bolt / key inserted in the impeller shaft locks the impeller to the shaft and

prevents rotation. Canted impeller blades are desirable near the bottom of tanks more than

5’ deep or where other forces of flow factor may be absent in the tank.

Welded type impeller


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Casting type impeller

Fig.3: Impeller type

5. Model selection and installation

Before installation / disassembly, read and understand ALL safety information presented in

this manual and associated documents. Review the equipment handling procedures in the

manual. Pay particular attention to information concerning “lift points” and the use of

spreader bars before lifting or moving the equipment.

Failure to observe proper equipment handling procedures may result in serious personal

injury and/or damage to the equipment.

Sizing

For proper mixing and suspension of solids, the mud agitator must be properly sized and

installed. To properly size a mud agitator, proceed as follows:

1. Select desired style – horizontal with welded / casting impeller

2. Determine available electric power - 440V/460V/380，60HZ , 380V/400V/415V，50HZ

or customized.

3. Select horsepower and impeller(s) as determined by the following factors:

a. Tank design - round or square

b. Tank dimensions

c. Maximum mud weight

d. Desired turnover ratio (TOR)


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After gathering the required information, the agitator can be properly sized to meet the

horsepower demand and correct agitation for the application. To ensure accurate sizing,

GN recommends clients to communicate with GN people to make sure size and model.

Following are operational recommendations for mud agitators:

1. Maintain uniform tank dimensions, i.e. equal width-to-length ratio or as close as

possible to equal.

2. Avoid TOR values greater than 85 seconds, as this may jeopardize solids suspension.

3. Avoid TOR values less than 40 seconds, as this may result in formation of a vortex and

increase air entrapment.

Installation

Following are the sequential steps of the mud agitator installation procedure. The sequence

presented is a guideline and may vary depending on the user’s facilities, previous

experience with this equipment, and optional equipment.

1. Read and understand all safety information & handling procedures in this manual, and

identify the mud agitator components.

2. Locate and weld mounting plate and stabilizer (if required) to tank structure.

3. Place shaft in tank, and assemble impeller(s), tapered bushings, and male coupling on

shaft.

4. Install female coupling on gearbox shaft.

5. Install motor and gearbox assembly, and attach shaft coupling to gearbox coupling.

6. Connect electric power supply to drive motor.

Leveling

To prevent undue premature wear on the gearbox or coupling and ensure long-term

reliability and efficiency of the mud agitator, the impeller shaft should rotate in a true

vertical orientation. This vertical installation is achieved by ensuring that the mounting

plate is absolutely horizontal. If a stabilizer is used, it must be directly aligned with the


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center of the mounting plate. The following paragraphs describe the correct methods for

installing the mounting plate and stabilizer.

Agitator mounting dimension as showed as following.

Fig.4: Agitator on the tank

Motor Power

S/C

5.5kw 7.5kw 11kw 15kw

A 640 640 690 770

B 700 700 750 840


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C 290 290 320 370

D 350 350 394 440

E ∅22 ∅22 ∅22 ∅22

F 595 595 657 700

G 903 903 1031 1133

H 97 97 97 115

Fig. 5 Agitator mounting dimension

Gearbox mounting plate

The mounting location must be determined before the gearbox is installed. When selecting

the mounting plate location, ensure that sufficient clearance is provided between the

impeller blades and the tank wall. Use a level to ensure absolute, horizontal orientation of

the mounting plate in two perpendicular directions. Select shims as needed to achieve level

mounting, mark the position of shims, and then remove the plate from the tank as it must


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be placed onto the gearbox shaft before installing the female coupling. If impeller shaft is more than 8’ long, a stabilizer is required to support the lower end of

the shaft.

Install the stabilizer as follows:

1. Drop a plumb line through the center of the mounting plate to locate the exact center

position of the stabilizer on the tank floor.

2. After determining its proper location, weld the stabilizer to tank floor.

Shaft assembly

Following installation of the stabilizer (if needed), place the shaft in the tank and assemble

as follows:

Hoist the shaft vertically, and carefully lower into the tank while maintaining suitable

support to permit assembly of impeller(s) and male coupling. While assemble shaft and

impeller, rigid coupling should assembled with spring waster and flat washer, and then

tighten, otherwise, it may cause runout of impeller shaft, and speed up the abrasion of

gearbox and bearing.

Impeller assembly

Install impeller with shaft, fixed with M14x140 bolt (2 bolts for each set of impeller)

The impeller mounting location is kept by GN before delivery.

For a canted single impeller or a dual impeller shaft, GN sets the distance of the lower

impeller from the tank floor at 75 percent of the impeller diameter. Mount the optional

second impeller at a distance above the tank floor that is equal to 2/3 of the tank’s

maximum mud height. For example, if the tank mud depth is 10’, the second (upper)

impeller key should be centered approximately 6.5’ above the bottom of the tank. For tank

depths of 6’ or less, install a single straight impeller not more than 12” above the tank

floor.


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Fig.6: Motor and gearbox installation instruction

Motor and gearbox assembly and installation

GN Solids control Co., Ltd. will install motor and gearbox before delivery. Clients can

installation or disassembly as request. For details, please refer motor/gearbox user

manual.

Gearbox and impeller coupling connection

1. Position and align shafts so that couplings are brought together, and fully mate couplings

on shaft and gearbox

2. Check for a gap at any location around the coupling flanges. A gap indicates angular

50

394

1031

657

750

M L

320

690

97

200 320

S=2

3M


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misalignment. Difficulty in mating the shafts indicates parallel misalignment. Alignment

should be checked with a dial indicator before bolting flanges together.

3. After aligning couplings, insert and tighten hex head screws (supplied with male

coupling) to the recommended torque. Tighten in stages, using an alternating pattern until

final torque is reached. Re-check torque after completing tightening sequence.

Fig. 7: Coupling assembly

Gearbox lubricant level Verify that lubricant level in the gearbox reaches the bottom of the oil level plug. Refer to Figure 8 for location of oil level plug.


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Fig. 8: Gearbox Plug Locations

6. Electrical connections

WARNING! TO AVOID SERIOUS PERSONAL INJURY BE SURE EQUIPMENT IS LOCKED OUT, TAGGED OUT, AND DE-ENERGIZED PRIOR TO PERFORMING MAINTENANCE AND/OR ADJUSTMENTS.

WARNING! MOTOR MUST BE OPERATED AT THE DESIGNATED SUPPLY VOLTAGE.

WARNING! HIGH VOLTAGE MAY BE PRESENT. BE SURE FUSED DISCONNECT SUPPLYING ELECTRICAL POWER TO THIS EQUIPMENT IS OPEN. LOCK-OUT AND TAG-OUT POWER SUPPLY TO PREVENT ACCIDENTAL APPLICATION OF POWER WHILE MAINTENANCE AND/OR ADJUSTMENTS ARE IN PROGRESS.

Level plug

Vent plug

Drain plug


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WARNING! ELECTRICAL CONNECTIONS MUST BE MADE IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE (NEC) AND ALL APPLICABLE LOCAL CODES. FAILURE TO COMPLY MAY RESULT IN AN UNSAFE CONDITION THAT COULD INJURE PERSONNEL OR DAMAGE EQUIPMENT. ENSURE THAT ALL ELECTRICAL AND CONDUIT CONNECTIONS ARE SECURE.

Before making power connections, be sure that electrical source meets one of the following

standards:

1. AC power at rated frequency is within ±10 percent of rated voltage, or

2. AC power at rated voltage is within ±5 percent of rated frequency, or

3. Combined variation in voltage and frequency is ±10 percent of rated values, provided

the frequency variation does not exceed ±5 percent of rated frequency.

Refer to drive manufacturer’s literature in Section 10 for additional assistance in making

electrical connections.

7. Storage & handling

If the machine will not be installed immediately, it should be covered with a tarpaulin

(tarp). If unit is stored outdoors, use a UV- resistant tarp, or UV-resistant shrink-wrap.

Install vents when using shrink-wrap. Seal operating and maintenance manual in plastic,

and attach to unit.

GN mud agitators are shipped disassembled except for motor and gearbox, which are

supplied as an assembly. All components including shaft are packaged in a sea/air worthy

wooden case.

The delivered equipment should be transported on the ground using a forklift, lifting lugs

as showed as fig.8.


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Fig. 9 Mud agitator lifting lugs

8. Machine start up & shutdown This section contains initial and normal startup and shutdown procedures for the mud

agitator. These procedures are designed to ensure safe operation and shutdown of the

equipment.

Initial startup

The Initial Startup procedure is to be used when the equipment is being started for the first

time, or when equipment is returned to use after an extended period out of service. The

initial startup is performed as follows:

1) Verify that all operators and maintenance personnel have read and understand all

operating and safety information.

2) Verify that equipment has been assembled and installed in accordance with part 2.

3) Check oil level in gearbox (see part 2). If low, fill to bottom of level plug.

4) Jog drive motor to check that impeller rotates in the correct direction. If rotation is

incorrect, shut down and lock out and tag out electric power, and reverse any two leads to

switch direction of motor rotation.


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5) Start up mud agitator in accordance with the Normal Startup procedure.

Normal startup and operation

After the initial startup, the mud agitator is started up and operated as follows:

1) Verify that all personnel, tools, documents, and other material are clear of equipment.

2) Turn on the mud agitator, and then open the associated mud feed and outlet systems.

3) Observe the operation of the impeller shaft assembly as the tank fills with mud and

verify continuous rotation of impeller(s).

Normal shutdown procedure

To shut down the mud agitator for any reason, first shut off the mud feed and then turn off

electric power to the agitator motor.

Emergency shutdown

To immediately stop the machine in case of emergency, open the fused disconnect

supplying electric power to the machine.

9. Maintenance

General

Routine maintenance is critical to ensure maximum life and trouble-free operation of the

mud agitator. While the recommended maintenance schedule in this section is flexible,

modifications should be based on experience with operating the equipment at your

facilities. A maintenance log should be kept to help establish a routine maintenance

schedule, as well as to monitor and adjust the schedule as necessary throughout the

equipment’s life. When determining a suitable maintenance schedule, consider duty cycle,

ambient temperature, and operating environment.


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WARNING! TO AVOID SERIOUS PERSONAL INJURY, LOCK OUT, TAG OUT, AND DE-ENERGIZE MACHINE PRIOR TO PERFORMING MAINTENANCE.

Routine maintenance

Routine maintenance consists of checking gearbox oil level and oil condition and greasing

gearbox bearings at required intervals.

Before operation, lubrate gearbox with L-CKE/P 220~320# worn gear oil (while ambient

temperature around -30~40℃; or with L-CKE/P 320~460# worn gear oil (while ambient

temperature around 25~65℃. Verify that lubricant level in the gearbox reaches the bottom

of the oil level plug. Refer to the following tables for oil quantities and approved

lubricants.

Bearings should be cleaned and re-greased on the same schedule as oil changing. After

cleaning, fill bearings to one-third of their free volume.

After 100 hours of initial startup, clean gearbox inside, add new grease oil. Then lubricated

at every 2500-hour interval.

Agitator model JBQ5.5 JBQ7.5 JBQ11 JBQ15

Motor power 5.5kw (7.5hp)

7.5kw (10hp)

11kw (15hp)

15kw (20hp)

Impeller speed 60/72RPM 60/72RPM 60/72RPM 60/72RPM

Worn gear grease oil

Brand & model

Ambient temperature -30 ~ 40℃

N460 worm gear oil Accordance with Standard: SH0094-1991

Ambient temperature 25 ~ 65℃

N220 worm gear oil

Gearbox oil Qty（L） 8.6 16.7 16.7 27.2

Lubricated with suitable grease oil as request. Refer following table with some

interchangeable grease oil brand for users to choose at different ambient temperature.


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Ambient temperature

Gearbox lubricating oil manufacturer & model

℃ Sinopec Shell Mobil 30 ~ 40℃ L-CKE/P220 Shell Tivela S320 Gear 630XP

L-CKE/P320 Shell Tivela S320 Gear 632XP 25 ~ 65℃ L-CKE/P320 Shell Tivela S320 Gear 632XP

L-CKE/P460 Shell Tivela S460 Gear 634XP

While gearbox or motor temperature over 90°C, or vibrate/sound abnormally, shut up

equipment and check immediately.

Fasten all linking bolts periodically.

10. Troubleshooting

If mud disturbance in the tank becomes unsatisfactory, check the possibilities listed below

and correct as described.

PROBLEM POSSIBLE CAUSE REMEDY Over-temperature Motor and gearbox not installed

suitably Adjust to suitable position, enable motor and gearbox axes concentric

Abnormal abrasion of oil seal Trickle lubricating oil at oil seal ledge

Lubricating oil too much or less Adjust oil quantity baseds on oil level plug

Lubricating oil not pure, or not workable well

Replacing with new oil

Too much vibration and noise

Motor and gear box not fixed well Check and find out the loosing point, fasten correctly

worm gear supplementary tooth badly worn/ damaged

Replacing worm gear supplementary tooth (connect GN)

bearing badly worn or disabled Replacing bearing Linking bolts for coupling and agitator output plate pull off, or foundation bolts pull off

Fasten or replacing bolts

Impeller shaft bended or deformed Align the shaft Impeller local distortion or broken off Repair or replace impeller

Working current fluctuated greatly

worm / gear in gearbox badly worn Inspection gearbox gradually, repair or replace relative parts

Far-forth top circle of shaft rubbed with stabilizer inner wall

Align shaft or re-install stabilizer


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Coupling damaged Replace coupling completely, or replace elastic sleeve package

Noise Bearing badly worn or with too bigger gap

Replace bearing

Worm gear supplementary tooth not joggled well

Repair booth surface or replace worm gear supplementary tooth

Lubricating oil insufficient Add oil accordance with oil gauge figure

extraneous materials in gearbox Clean out lubricating oil to empty extraneous materials, and add new oil

Oil leakage Oil sealing ledge badly worn Replace oil sealing Too much lubricating oil Adjust oil quantity accordance

with oil gauge figure Oil level plug screw not tighten well Tighten or add more sealing

adhesive tape Oil leveler damaged Replace oil a new leveler

Worm gear supplementary tooth worn shortly

Lubricating oil cannot meet standard Replace suitable lubricating oil

Lubricating oil insufficient Refill lubricating oil accordance with oil leveler showed

Lubricating oil is not changed timely, and become degraded

Replacing lubricating oil timely as request

over-temperature while operation Treated as over temperature or reduce ambient temperature

11. Recommended spare parts The following is a recommended spare parts list for 1 year operation:

S/C Series no. Model Qty Remarks

1

Worm wheel bearing

30210 2

GNJBQ5.5/7.5 Worm bearing 6213 2 Worm wheel oil seal 65x95x12 1

Worm oil seal 50x80x12/10 1

2

Worm wheel bearing

30211 2

GNJBQ11 Worm bearing 6214 2 Worm wheel oil seal 70x100x12 1


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Worm oil seal 55x80x12 1

3

Worm wheel bearing

30212 2

GNJBQ15 Worm bearing 6215 2 Worm wheel oil seal 75x105x14 1

Worm oil seal 60x90x12 1

12. Terms of warranty

All GN equipment sold pursuant to this agreement, guarantee 14 Months after

shipment or 12 months after commissioning, whichever comes first. During the guarantee

period, GN will be responsible for problems caused by quality of production or raw

material except the wearing spare parts of the equipment and problems caused by incorrect

man-made operation, providing GN operating, maintenance and inspection

recommendations are followed, and authorized oil filters and lubricants are utilized and

replaced at the recommended intervals.

In the event of improper installation, abuse, misuse, improper operation or improper

or lack of maintenance of GN equipment in accordance with GN recommendation and

accepted industry practice, this Warranty will become null and void with respect to such

GN equipment. During the period of warranty and upon written notification to GN by the

Purchaser, GN guarantees replacement of all parts manufactured by GN shown to be

defective in material and manufacture. GN makes no further warranty, either expressed or

implied, for any amount in excess of the cost of repair or replacement of any part shown to

be defective. The foregoing warranty shall be null and void and of no further force or

effect with respect to any GN equipment on which any repairs or maintenance, other than

normal wear part replacements, are performed by any service provider other than GN or

GN authorized providers.

This Warranty does not cover and GN makes no warranty covering:

a. Failures occurring after expiration of the warranty period.

b. Failure caused by decomposition by chemical action or wear caused by abrasion.

c. Equipment damaged in shipment or by accident.

d. Defects in articles purchased by GN or its affiliates from non-affiliated parties and


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resold without alteration, which are covered by warranty from the original manufacturer.

e. Failures due to abuse, misuse, or lack of proper recommended maintenance.

f. Failures of equipment, which has in any way been repaired or altered except as

authorized by GN or equipment using components manufactured or repaired by any other

party than GN unless expressly authorized by GN.

The foregoing warranty shall be herein referred to as the “Agitator Warranty”. The

Mud Agitator Warranty is for the exclusive benefit of Purchaser.

THE AGITATOR WARRANTY CONSTITUTES GN’S SOLE AND

EXCLUSIVE WARRANTY WITH RESPECT TO ANY AGITATOR PURCHASED

HEREUNDER, EXCEPT FOR THE AGITATOR WARRANTY, GN HEREBY

DISCLAIMS ALL EXPRESS WARRANTIES (WHETHER ORAL, WRITTEN OR

ARISING BY PROMISE, DESCRIPTION OR SAMPLE) AND ALL IMPLIED

WARRANTIES, INCLUDING, WITHOUT LIMITATION, WARRANTIES OF

NON-INFRINGEMENT, ANY WARRANTY OF MERCHANTABILITY AND

FITNESS FOR ANY PARTICULAR PURPOSE, AND ALL WARRANTIES

ARISING BY CUSTOM OR TRADE USAGE.

Purchaser represents that it has evaluated the GN Agitators in light of the Agitator

Warranty and has determined that the GN Agitator are fit and sufficient for Purchaser’s

operations (including the Processing applications). Purchaser acknowledges that it is solely

responsible for evaluating and choosing the sites where the GN Agitator will be installed

and the manner in which GN Agitators will be used.

GN does not warrant that the Environmental Protection Agency (“EPA”) or any other

regulatory authority has approved or certified the GN Agitators for any purpose.

Purchaser assumes any risk, burden and/or costs of EPA or their regulatory

compliance with respect to any GN Agitator acquired pursuant to this Agreement.

GN has made no inspection of the sites where Purchaser intends to install the

Centrifuges and disclaims any warranties with respect to installation of the GN Agitators.

Purchaser shall use its best efforts to ensure that all persons or entities renting or leasing

GN Agitators are informed of the foregoing exclusive warranty and warranty disclaimer.


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13. Installation and maintenance log

Purpose

This section should be used by operating and maintenance personnel to record historical

information gathered during the installation and operation of GN equipment. If properly

kept, the log will be useful for altering maintenance intervals and intercepting trends that

may indicate the need for changing operating procedures. Each entry in the log should be

dated for future reference and tracking. If required, additional pages may be added to the

log by copying a blank page or simply inserting ruled paper at the rear of the section.


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Installation and Maintenance Notes:

Agitator User Manual

Documents

Transcript of Agitator User Manual