3 | Baker Hughes
Copyright 2020 Baker Hughes Company. All rights reserved.
Introduction
Scope
The following instructions are designed to guide the user
through the installation and maintenance of the DSH Series
Desuperheater.
The Desuperheater product is part of Baker Hughes Masoneilan’s
Severe Service Product portfolio, and is custom designed to fit
our customers’ high temperature and high pressure applications.
For this reason, sections of this instruction manual may be
replaced with specific drawings and descriptions that apply
only to the desuperheaters that are specified for use on a given
project. For further detailed information on your specific DSH
Series Desuperheater design, please contact the Baker Hughes
Masoneilan factory.
Serial Plate
The serial plate is usually fixed to the nozzle housing. It indicates
information about the desuperheater including size and type,
pressure class rating, body material, and serial number.
Careful attention must be paid towards the serial plate prior
to pressurizing of the Desuperheater. Inlet, outlet, and water
connections may be independently designed for the conditions
at their point of operation, thus ANSI pressure class ratings may
differ at each connection.
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 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 Baker Hughes 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 nozzle housing.
Unpacking
Care must be exercised when unpacking the product to prevent
damage to the accessories and component parts. Contact the
local Baker Hughes Sales Office or Service Center with any
issues or problems. Be sure to provide the model number and
serial number in all correspondence.
Installation
Note: It is highly recommended to review the Desuperheater
Installation Guide (GEA33465) for a thorough explanation of the
proper Desuperheater system layout. These design guidelines
are intended for performance optimization of the steam
conditioning system.
The recommendations provided on the installation guide include,
but are not limited to:
- Upstream straight pipe length
- Downstream straight pipe length
- Temperature sensor quantity and location
- Pressure sensor location
- Pipe size and selection
- Downstream piping material transition
- Spray water system and strainer recommendations
- Piping drain locations
For optimum valve performance, it is critical to implement as
recommended on the SteamForm Installation Guideline.
Piping Cleanliness
Before installing the desuperheater in the line, clean piping and
desuperheater of all foreign material such as welding chips,
scale, oil, grease or dirt. Gasket mating surfaces must be
thoroughly cleaned to ensure leak-free joints. Sacrificial start-up
fixtures can be purchased to protect the operational components
during the installation and line flushing phases.
If major system or piping modifications (or repairs)
are performed, thorough flushing and blow down of
the system will be required. Sacrificial components
should be installed in the desuperheater to protect
the integrity of the flow passages. Failure to follow
this warning will violate the valve warranty agreement
and could result in control instability, excessive noise
levels, and leakage.
