4 | Baker Hughes
Copyright 2020 Baker Hughes Company. All rights reserved.
1. General
These adjustment and maintenance instructions apply to the
10900 Series Actuators used with the Masoneilan 500 Series
Pressure Regulators. They include a parts reference list
including recommended spare parts.
For installation, operation, adjustment and maintenance of the
500 Series Regulators body S/A refer to instructions numbers
indicated by the following table.
Regulator
Model No
525; 525-50
526; 526-50
Body S/A
Instruction No
535H; 535H-50
536H; 536H-50
535V; 535V-50
30557
31597
176419 E
Spare parts
When performing maintenance always use Baker Hughes
replacement parts. Masoneilan Parts are obtainable through
your local Baker Hughes Representative or Masoneilan Spare
Parts Department. When ordering parts, always include
Masoneilan Model and Serial Numbers shown on serial plate.
After sales Department
Baker Hughes has a highly skilled After Sales Department
available for start-up, maintenance and repair of our regulators and
components parts. Contact the nearest Baker Hughes Sales
Office or Representative.
Training
Baker Hughes Masoneilan regularly holds training seminars
for technicians. In order to participate in one of these training
seminars you should contact our local Baker Hughes Masoneilan
Representative or our Training Department.
The following instructions should be thoroughly
reviewed and understood prior to installing operating
or performing maintenance on this equipment. Only
qualified personnel to service this equipment.
Non-compliance with safety rules and caution notes
of this instruction may bring about malfunction of
the device or damage it seriously. In addition, such
negligence might expose personnel present in the field
to grave hazards.
2. Description-Operation
The 10900 Actuator is a simple powerful mechanical device. It
is Air-to-Extend Stem type. The nominal range of an actuator is
the pressure range in pounds per square inch (psi) in which the
pressure setting can be obtained by adjustment.
Conformation of the diaphragm (11) to the diaphragm plate (10)
serves as a flexible upper guide for the actuator stem (6). Nylon
reinforced neoprene diaphragms permit smooth, sensitive
operation. The lower guide is an oil impregnated bronze bush-
ing (3) located in the spring adjuster (2).
Note:
On request, for special services, the nylon reinforced
neoprene diaphragm may be provided with a PTFE coating.
Other materials are optional and available to suit the fluids
involved.
Regulator
Model No
REDUCING
Function
Spring Diaphragm
Actuator Type
525
535H
535V
BACK
PRESSURE
DIFFERENTIAL
REDUCING
525-50
535H-50
535V-50
526
536H
Differential
526-50
536H-50
DIFFERENTIAL
BACK PRESSURE
The 10900 Series Actuators are designed for use with the 500
Series Regulators for reducing, back pressure and differential
pressure applications.
The opposite chart indicates the combinations available to
provide the desired function. The 10900 Series Actuators are
designated by the nominal range (psi). See the following chart.
In Spring Diaphragm Actuators, three actuator cases are
available: a case rated for 60 psi static pressure, a case rated
for 250 psi static pressure and a case rated for 750 psi static
pressure.
In Differential Pressure Actuators, two actuator cases are
available: a low-pressure case rated for 250 psi static pressure,
and a high-pressure case rated at 600, 1000 and 1500 psi static
pressure.
Range
(psi)
Actuator
Type
0.5 - 3
Max. Static
Pressure
(psi)
Case
Size
2 - 10
6 - 20
15 - 40
30 - 75
60 - 125
80 - 250
150 - 750
3 - 12
10 - 35
30 - 75
60 - 125
3 - 15
30 - 85
5 - 30
10 - 60
75 - 185
L o w P r e s s u r e C a s e
Spring
Diaphragm
Differential
H i g h P r e s s u r e C a s e
100 - 330
250
600
1000
1500
5
4
5
4
3 1/2
5
9
4
3 1/2
Special
60
250
750
