Masoneilan Regulators Models 525 & 526 Manual | 2
Copyright 2020 Baker Hughes Company. All rights reserved.
1. Introduction
The following instructions should be thoroughly reviewed
and understood prior to installing, operating or performing
maintenance on this equipment. Throughout the text, safety
and/or caution notes will appear and must be strictly adhered to,
otherwise, serious injury or equipment malfunction could result.
Serial Plate
The serial plate is usually fixed to the side of the actuator yoke. It
indicates information about the regulator including size and type,
pressure class rating, body/bonnet material, and serial number.
After Sales Service
Baker Hughes offers Masoneilan After Sales Service comprised
of highly qualified technicians to support the installation,
operation, maintenance and repair of its equipment. For support
contact the local Baker Hughes Masoneilan representative or
Baker Hughes Masoneilan factory located closest to you.
Spare Parts
Only Masoneilan replacement parts should be used when
carrying out maintenance operations. Obtain replacement parts
through local Masoneilan representatives or Masoneilan Parts
Department.
When ordering spare parts, the MODEL AND SERIAL NUMBERS
indicated on the manufacturer’s serial plate MUST BE GIVEN.
The serial plate is on the side of the actuator yoke.
Actuator and Accessories
Actuators and other valve accessories have their own instruction
manuals that provide information and details on the assembly
and installation. Refer to the appropriate instruction manual for
each unique accessory.
2. General
These installation and maintenance instructions apply to all
sizes and ratings of the Masoneilan 525/526 model regulators
regardless of the type of trim used.
525/526 model double seat regulators are designed with built in
versatility making them well-suited to handle a wide variety of
process applications.
Standard construction offers a contoured plug with a threaded
seat ring. The upper and lower plug guiding provides maximum
support to ensure plug stability. A series of reduced area trim is
available to provide wide flow range capabilities in all regulator
sizes. Tight Shutoff Class II leakage is standard.
Recommended spare parts required for maintenance are listed
in the Parts Reference table on page 11. The model number,
size, rating and serial number of the valve are shown on the
identification tag located on the actuator. Refer to the below chart
for the 525/526 numbering system.
3. Unpacking
Care must be exercised when unpacking the regulator to prevent
damage to the accessories and component parts. Should any
problems arise, contact the local Masoneilan Representative or
After Sales Department.
2nd
3rd
4th
1st
5. Regulator
Type
2. Double
Seat
5. Reducing Services
(1)
6. Back Pressure
Services
(2)
-50. Differential Pressure
-6. Extended Bonnet
Body Series
Plug Type
Other Options
(1) Downstream Pressure Controlled (See Figure 1a)
(2) Upstream Pressure Controlled (See Figure 1b)
