Baker Hughes Masoneilan 77-80H Series User manual

Baker Hughes Data Classification: Public
Masoneilan™
77-80H/00-80HSeries
Air Valve
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 77-80H/00-80H Air Valve Instruction Manual | 3
Safety Information
Important –
Please read before installation
These instructions contain DANGER, WARNING,
and CAUTION labels, where necessary, to alert
you to safety related or other important information.
Read the instructions carefully before installing
and maintaining your control valve.
DANGER and WARNING hazards are related to
personal injury. CAUTION hazards involve
equipment or property damage. Operation of
damaged equipment can, under certain
operational conditions, result in degraded
process system performance that can lead to
injury or death. Total compliance with all
DANGER, WARNING, and CAUTION notices is
required for safe operation.
This is the safety alert symbol. It alerts you to potential
personal injury hazards. Obey all safety messages that follow
this symbol to avoid possible injury or death.
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided,
could result in serious injury.
Indicates a potentially hazardous situation which, if not avoided,
couldresult in minor or moderateinjury.
When used without the safety alert symbol, indicates a
potentially hazardous situation which, if not avoided, could
result in property damage.
Note: Indicates important facts and conditions.
About this Manual
•The information in this manual is subject to
change without prior notice.
•The information contained in this manual, in whole
or part, shall not be transcribed or copied without
Baker Hughes’s written permission.
•Please report any errors or questions about the
information in this manual to your local supplier.
•These instructions are written specifically for the
77-80H/00-80H, and do not apply for other valves
outside of this product line.
•These instructions apply to 77-80H/00-80H
operated with our Valve Control System (including
the fluid level gauge). In the case of using the
equipment for other systems, the designers of the
systems or those who decide on the specifications
of the systems should judge the adaptability of the
equipment.
Warranty
Items sold by Baker Hughes are warranted to be free
from defects in materials and workmanship for a
period of one year from the date of shipment provided
said itemsare used according to Baker Hughes
recommended usages. Baker Hughes reserves the
right to discontinue manufacture of any product or
change product materials, design or specifications
without notice.
Note: Prior to installation
The valve must be installed, put into service and
maintained by qualified and competent
professionals who have undergone suitable
training.
All surrounding pipelines must be thoroughly
flushed to ensure all entrained debris has been
removed from the system.
Under certain operating conditions, the use of
damaged equipment could cause a degradation
of the performance of the system which may lead
to personal injury or death.
Changes to specifications, structure, and
components used may not lead to the revision of
this manual unless such changes affect the
function and performance of the product.

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■Storage
•Store the equipment in places protected from rainwater.
•Store the equipment in places with minimal vibration and impact.
•Keep the equipment in places at normal temperature and humidity (i.e., approximately 23°C
and 65%).
•Protect the connection port with an appropriate component, such as a cap, to prevent the
intrusion of foreign substances after using the equipment.
■Installation
•Do not remove the cap attached to the connection port until just before installation:
a foreign body may enter, which may result in malfunction.
•Install the air instrumentation components so that the air will flow in the direction Indicated
on the equipment, otherwise, it may cause malfunction of the valve.
■Air Source
•Use clear air.
Do not use compressed air that contains chemicals, synthetic oil based on organic solvents, or
corrosive gas, or otherwise an equipment breakdown or operational failure may result.
•Use an air drier or after cooler for air that contains a large quantity of drainage.
Otherwise, the malfunctioning of devices driven by compressed air may result.
■Air Piping
•When you install piping, purge sufficiently inside the piping to remove any chip and/or
foreign body.
•For air piping, use a pipe with a sufficient diameter to operate the valve.
Apply Loctite 577 or equivalent to the air piping joint, except 1 to 1.5 threads at the joint end.
When you use a sealing tape, do not apply it to the 0.5 to 1 threads at the joint end.
Otherwise, a small piece of the tape may clog inside, which may cause malfunction of the valve.

© 2021 Baker Hughes Company. All rights reserved. Masoneilan 77-80H/00-80H Air Valve Instruction Manual | 5
■Maintenance
•Isolate the valve from the control system.
•Make sure that the valve, controller, or any other equipment will not operate suddenly.
•Gradually extract the pressure of air in all the operating lines and disconnect the operating
lines only after the air is entirely extracted.
An unexpected operation may result in personnel being injured or killed.
•For replacement, use the original Masoneilan parts.
Otherwise, malfunction and/or fluid leakage may result.

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Content
1. Outline_______________________________________________ 7
2. Specification __________________________________________ 7
3. Installation____________________________________________ 7
5. Maintenance __________________________________________ 8
6. Reassembly___________________________________________ 8

© 2021 Baker Hughes Company. All rights reserved. Masoneilan 77-80H/00-80H Air Valve Instruction Manual | 7
1. Outline
The 77-80H, an air valve that consists of a combination of pilot valve and three-way valve,
is a high-capacity "set pressure control" type three-way valve.
Besides this, there is the 00-80H, the so-called three-way valve - the 77-80H from which
the pilot valve is removed.
In case a plurality of 77-80H valves are needed, use one 77-80H valve and 00-80H
valves for the rest and connect the outlet pressure of the 77-80H's pilot valve to "SIG" of
each 00-80H valve. By so doing, not only piping is simplified but also change-over can be
made simultaneously.
2. Specification
Item
Standard
Option
Max Operating
Pressure
Body
880 kPa
－
Signal
1030 kPa
－
Set Pressure Range
100 –700 kPa
－
Hysteresis
<= 34 kPa
－
Cv Value
IN →OUT
4.56
－
OUT →EXH.
4.25
－
Connection
IN, OUT, EXH.
Ports
Rc1/2
½ NPT
SIGNAL Port
Rc1/4
¼ NPT
Operating Temperature Range
-30 to +70℃
-18 to +100°C (High Temp)
-49 to +80°C (Low Temp)
Housing Material
Aluminum Alloy
－
3. Installation
Prior to installing, clean all lines thoroughly to remove all dirt, scale or other foreign
matter.
Install the air valve as near the actuator as possible, holding the number of connections
to a minimum, so that the air flows in the direction indicated by the marks, ”IN" and "OUT"
on the underside of valve body. There are two "EXH" ports. Use the necessary one and
pipe plug the other. When the valve is to be used as a lock-up valve, the both ports must
be pipe plugged.
The signal pressure piping should be made by connecting the supply pressure directly to
"SIG. IN" so that when the air pressure drops below the set pressure or disappears the
air valve operates to close "IN" and connect "OUT" and "EXH”.
Do not use for air pressures exceeding 880 kPa.
Be careful not to take the signal pressure from near the "IN” side of body because
due to the large capacity of the air valve this gives rise to a change in signal air
pressure, thereby causing hunting.

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4. Adjustment
The air valve is normally factory set and does not require adjustment.
If it becomes necessary to adjust set pressure:
A) Turn adjusting screw (19) to relieve range spring (23) of air valve from compression.
B) Connect air supply to “IN” of body to check for closing and opening of body, then connect
pressure gauge and pressure regulator to the signal pressure connection "SIG IN".
C) Turn on air supply pressure and adjust the pressure regulator to set the pressure at a desired
value, observing the air supply pressure to “SIG IN” on the pressure gauge. Then turn the
adjusting screw clockwise until there is no air leak from "OUT" of body. At this point, the air
valve has its "IN" closed and "OUT" and "EHX" communicated.
D) Finally, tighten adjusting screw locknut (20) and connect the air valve outlet and "OUT" to the
actuator and the signal pressure line to the supply pressure.
5. Maintenance
If the air valve does not operate properly, inspect it as follows.
A) Shut off the supply pressure
B) Return the adjusting screw to its former position and loosen the spring.
Disassembling Procedure
Remove four screws (25) and remove O-Ring (15), housing S/A, range spring (23), spring button
(17) and spring case (18) from body (1).
For housing (2), diaphragm S/A (16) and pilot valve (6) can be removed by loosening nut (21) and
pilot retainer (7) respectively.
To disassemble body S/A, first remove bottom cap (26), take out spring (9), remove nut (24) on the
underside of plug S/A and pull out spring washer (22), insert retainer (5) and rubber insert (8).
After that, push up the bottom or plug (3) to remove piston (4) and rubber insert (8) together with
plug.
Inspection should be made in the following way:
First examine diaphragm (16) for rupture and damaged edge. Inspect the seat of pilot valve (6) for
dust and damage. Also inspect O-rings (13) and (14). Replace all of these parts by new ones if
necessary. For the valve body, inspect O-rings (10), (11), (12) and (15) and rubber insert (8).
Replace them with new ones if necessary.
Check the valve seat for dust and clean it.
6. Reassembly
Reverse the disassembly procedure. Before setting to reassembly, apply silicon grease to O-rings.
Do not fail to use a new shim (27).

© 2021 Baker Hughes Company. All rights reserved. Masoneilan 77-80H/00-80H Air Valve Instruction Manual | 9
INLET
PRESSURE
880 kPaG
(125 psiG)
SET RANGE
35 –700 kPaG
(5 –100 psiG)
Rc1/4 (NPT1/4）
SIGNAL
Rc1/2 (NPT1/2）
EXHAUST
Rc1/2（NPT1/2)
OUTLET
Rc1/2 (NPT1/2）
INLET

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INLET
PRESSURE
880 kPaG
(125 psiG)
SIGNAL
PRESSURE
35 –700 kPaG
(5 –100 psiG)
Rc1/4 (NPT1/4）
SIGNAL
Rc1/2（NPT1/2）
EXHAUST
Rc1/2（NPT1/2）
OUTLET
Rc1/2（NPT1/2）
INLET