30 | Baker Hughes
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Appendix for high pressure valves 21000 API 6A Series
There are two serial plates, one for the valve body sub-assembly
and one for the actuator sub-assembly
2.3. After Sales Service
Baker Hughes offers it clientele an After Sales Service comprising
highly qualified technicians, for the operation, maintenance, and
repair of its equipment. To benefit from this service, contact our
local representative or the After Sales Service whose e-mail
address is given at the end of this document.
2.4. Spare Parts
When carrying out maintenance operations, only manufacturer’s
replacement parts must be used, obtained through our local
representatives or our Spare Parts Service.
When ordering spare parts, the model and serial numbers
indicated on the manufacturer’s serial plate must be given.
The recommended spare parts are indicated in the parts list
included in this Appendix on page 35.
2.5. Actuator and Other Accessories
The valve is equipped with an actuator; like all the other valve
accessories, actuators are the subject of special instructions
which provide information on the electric and pneumatic
connections. The instruction manuals to be used for standard
actuators are Ref. 31188 for 51/52/53 pneumatic piston actuators
and Ref. 19530 for actuators Models 87/88.
2.6 Warranty
:
Refer to General terms beginning on page 1 of the Manual.
21000 API 6A should be closed for a short period only. There
is a risk of damage for trim parts for long period of closing.
21000 API 6A valves are designed as control valves, not as
isolating valves.
If 21000 are used as isolating valve, internal parts damage
will not be covered by warranty.
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.
Baker Hughes has a highly skilled After Sales Department
available for start-up, maintenance and repair of our valves and
component parts.
Arrangements for this service can be made through your local
Baker Hughes's representative or sales department. When
performing maintenance use only
Masoneilan
™
replacement
parts. Parts are obtainable through your local representative or
spare parts department. When ordering parts, always include
Model and Serial Number of the unit being repaired.
2. General
2.1. Scope
The following instructions are designed to guide the user through
the installation and maintenance of the 21000 API 6A Series
valves for all sizes and for high working pressures (ie 10K PSI
and 15K PSI).
21000 API 6A Series single ported, cage guided control valves are
designed to meet API 6A standard for high pressure applications.
Leakage class IV & V as per IEC-60534-4 are standard for 21000
API 6A valves Series.
An optional Low Emission Low-E Packing is available to assure
compliance with the fugitive emission containment requirements.
2.2. Serial Plate
The serial plate is usually fixed to the side of the actuator
yoke. It indicates, amongst other things, the type of valve, the
working pressure, the material class, temperature class, product
specification level, performance requirement used for the
pressurized chamber and the air supply pressure of the actuator.
2nd
Flow
Characteristics
1. Linear
2nd
5th
4th
3rd
87 Spring Diaphragm
Air-to-Close
88 Spring Diaphragm
Air-to-Open
51
Double Acting
Piston
52
Single Acting Piston
Air-to-Close
5
3
Single Acting Piston
Air-to-Open
1st
1st
Plug Type
1. Contoured
Actuator Type
Seat Type
4. Quick Change
Body
Series
21
Table 1 - 21000 API 6A Numbering System
