Baker Hughes Masoneilan 7700P User manual

Baker Hughes Data Classification: Public
Masoneilan™
Type7700PPneumatic Positioner
Instruction Manual (Rev.A)

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THESE INSTRUCTIONS PROVIDE THE CUSTOMER/OPERATOR WITH IMPORTANT
PROJECT-SPECIFIC REFERENCE INFORMATION IN ADDITION TO THE CUSTOMER/
OPERATOR’S NORMAL OPERATION AND MAINTENANCE PROCEDURES. SINCE
OPERATION AND MAINTENANCE PHILOSOPHIES VARY, BAKER HUGHES COMPANY
(AND ITS SUBSIDIARIES AND AFFILIATES) DOES NOT ATTEMPT TO DICTATE SPECIFIC
PROCEDURES, BUT TO PROVIDE BASIC LIMITATIONS AND REQUIREMENTS CREATED
BY THE TYPE OF EQUIPMENT PROVIDED.
THESE INSTRUCTIONS ASSUME THAT OPERATORS ALREADY HAVE A GENERAL
UNDERSTANDING OF THE REQUIREMENTS FOR SAFE OPERATION OF MECHANICAL
AND ELECTRICAL EQUIPMENT IN POTENTIALLY HAZARDOUS ENVIRONMENTS.
THEREFORE, THESE INSTRUCTIONS SHOULD BE INTERPRETED AND APPLIED IN
CONJUNCTION WITH THE SAFETY RULES AND REGULATIONS APPLICABLE AT THE
SITE AND THE PARTICULAR REQUIREMENTS FOR OPERATION OF OTHER EQUIPMENT
AT THE SITE.
THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS IN
EQUIPMENT NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN
CONNECTION WITH INSTALLATION, OPERATION OR MAINTENANCE. SHOULD
FURTHER INFORMATION BE DESIRED OR SHOULD PARTICULAR PROBLEMS ARISE
WHICH ARE NOT COVERED SUFFICIENTLY FOR THE CUSTOMER/OPERATOR'S
PURPOSES THE MATTER SHOULD BE REFERRED TO BAKER HUGHES.
THE RIGHTS, OBLIGATIONS AND LIABILITIES OF BAKER HUGHES AND THE
CUSTOMER/OPERATOR ARE STRICTLY LIMITED TO THOSE EXPRESSLY PROVIDED IN
THE CONTRACT RELATING TO THE SUPPLY OF THE EQUIPMENT. NO ADDITIONAL
REPRESENTATIONS OR WARRANTIES BY BAKER HUGHES REGARDING THE
EQUIPMENT OR ITS USE ARE GIVEN OR IMPLIED BY THE ISSUE OF THESE
INSTRUCTIONS.
THESE INSTRUCTIONS ARE FURNISHED TO THE CUSTOMER/OPERATOR SOLELY TO
ASSIST IN THE INSTALLATION, TESTING, OPERATION, AND/OR MAINTENANCE OF THE
EQUIPMENT DESCRIBED. THIS DOCUMENT SHALL NOT BE REPRODUCED IN WHOLE
OR IN PART WITHOUT THE WRITTEN APPROVAL OF BAKER HUGHES.

© 2021 Baker Hughes Company. All rights reserved. Masoneilan 7700PInstructions Manual | 3
Contents
Warning........................................................................................................................................................ 4
1. Instrument Operation................................................................................................................. 5
2. Numbering System .................................................................................................................... 5
3. Technical Data............................................................................................................................ 5
3.1. Performances .................................................................................................................... 5
3.2. Schematic........................................................................................................................... 5
4. Assembly of a 7700P Positioner on a Valve.......................................................................... 7
5. Pneumatic Connection of Positioner 7700P.......................................................................... 7
6. Calibration of the 7700P Positioner......................................................................................... 7
7. Maintenance of the Positioner ................................................................................................. 7

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WARNING
BEFORE installing, using or carrying out any maintenance tasks associated with this instrument,
READ THE INSTRUCTIONS CAREFULLY.
It is the end user's responsibility to:
•Verify material compatibility with the application
•Ensure proper use of fall protection when working at heights, per Safe Site Work
Practices
•Ensure use of proper Personal Protective Equipment
•Take the appropriate actions to ensure that site personnel who are performing
installation, commissioning and maintenance have been trained in proper site
procedures for working with and around equipment, per Safe Site Work Practices
Baker Hughes reserves the right to discontinue manufacture of any product or change
product materials, design, or specifications without notice.
Under certain operating conditions, the use of damaged instruments could cause a degradation of
the performances of the system which may lead to personal injury or death.
Use only genuine replacement parts, which are provided by the manufacturer, to guarantee the
proper working of the product.

© 2021 Baker Hughes Company. All rights reserved. Masoneilan 7700PInstructions Manual | 5
1. Instrument Operation
The Model 7700P positioner operation principle is a force-balance mechanism:
•An entry force exerted by the double diaphragm under the effect of a pneumatic signal pressure
•An opposite force developed by a feedback spring. The tension of this spring varies with the
displacement of the actuator lever to which it is connected.
2. Numbering System
Unique positioner: 7700P
Different versions:
•Housing material:
oAluminum
oStainless steel
•Mounting:
oSingle lever: 28001
oAdjustable Cv: 28002
3. Technical Data
3.1. Performances
Performances
(% of the signal range)
Started point (closed valve)
2,0 %
Hysteresis (mid-stroke)
0,9 %
•Maximum service temperature range: -40°C to +85°C
•Storage temperature: -55°C to +90°C
3.2. Schematic

6 | Baker Hughes © 2021 Baker Hughes Company. All rights reserved.

© 2021 Baker Hughes Company. All rights reserved. Masoneilan 7700PInstructions Manual | 7
4. Assembly of a 7700P Positioner on a Valve
Note: Before installation, check that the device is undamaged. In the event of damage, replace the
defective parts with genuine manufacturer's replacement parts.
If the positioner is shipped alone, the user is responsible for its installation and pneumatic connections and its
calibration.
Please refer to 28000 Series Varipak instruction manual Ref. 30857 for more details.
5. Pneumatic Connection of Positioner 7700P
Make sure that the air supply pressure is suitable for the installation and for the instrument.
When using a positioner, make sure that the air supply pressure matches the one specified on the
serial plate without exceeding 275 kPa (40 psi).
Diameter of tubing required: 4 x 6 mm.
6. Calibration of the 7700P Positioner
•Comply with current national and local regulations for installation.
•Before carrying out any work on the device, power off the instrument.
The positioner assembled on valve is factory-calibrated, but if it is necessary to remake the calibration on
the site, it will be carried out by the customer according to the following general principles
•Make the pneumatic connections, see §5.
•The adjustment of the starting pressure is made by screw (K116). Calibrate the pneumatic signal
corresponding to the closing of the valve (3-15psi or 6-30psi). Turn the take-up screw (K116) until
the piston rod just begins to move (the plug leaves the contact with the seat ring).
•Tighten the locknut (K117).
7. Maintenance of the Positioner
•Comply with current national and local regulations for installation.
•Before carrying out any work on the device, power off the instrument.
•Make sure that the components of the instrument are not damaged. In the event of damage replace the
defective parts with genuine manufacturer's replacement parts.
•Pay particular attention of any defect of the housing.
•Avoid contact of the apparatus with aggressive substances which could damage the metallic or plastic
parts.

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Find the nearest local Channel Partner in your area:
valves.bakerhughes.com/contact-us
Tech Field Support & Warranty:
Phone: [phone]
[e-mail]
valves.bakerhughes.com
Copyright 2021 Baker Hughes Company. All rights reserved. Baker Hughes provides this
information on an “as is”basis for general information purposes. Baker Hughes does not make any
representation as to the accuracy or completeness of the information and makes no warranties of
any kind, specific, implied or oral, to the fullest extent permissible by law, including those of
merchantability and fitness for a particular purpose or use. Baker Hughes hereby disclaims any
and all liability for any direct, indirect, consequential or special damages, claims for lost profits, or
third party claims arising from the use of the information, whether a claim is asserted in contract,
tort, or otherwise. Baker Hughes reserves the right to make changes in specifications and features
shown herein, or discontinue the product described at any time without notice or obligation.
Contact your Baker Hughes representative for the most current information. The Baker Hughes
logo and Masoneilan are trademarks/is a trademark of Baker Hughes Company.
Other company names and product names used in this document are the registered trademarks or
trademarks of their respective owners.
BHMN-7700P-IOM-34602A-0221 02/2021