Emerson Bettis PressureGuard, Руководство по установке и обслуживанию

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March 2014
Installation and Maintenance Manual
E-90090005 Rev. A
2
Section 2: Introduction
Introduction
Section 2: Introduction
2�1 General Service Information
BETTIS™ PressureGuard™ is a self-contained hydraulic Emergency Shutdown (ESD) system.
It is designed to provide reliable valve shutdown on production wellheads in remote
locations where automatic local valve ESD is required, but a power source is not available
and/or local supervision is minimal.
Available as a complete, tailored-solution, BETTIS™ PressureGuard™ usually consists of
a self-contained hydraulic module, a hydraulic operator, and application-specific
shutdown trigger accessories. PressureGuard™ systems can be configured for rotary
hydraulic operators for use with ball, plug, and other quarter-turn valves, as well as non-6A
linear-operated valves. A variety of shutdown trigger controls including pressure pilots,
solenoid valves, and a temperature-sensing fusible plug are available to suit application
requirements. Instructions for installing BETTIS™ PressureGuard™ system are provided in
Section 5.
(Installation).
Under normal conditions, BETTIS™ PressureGuard™ maintains the valve in its operational
position by resisting the spring force with hydraulic fluid pressure. In an event requiring
automatic ESD valve operation, the PressureGuard™ employs a control component to
shift hydraulic fluid from the valve operator to an internal reservoir. Without fluid pressure,
the compressed spring in the operator moves the valve to its shutdown position. Further
information on the operation of BETTIS™ PressureGuard™ is provided in Section 4
(Operation).
Through robust design and quality construction, minimal maintenance is required of
BETTIS™ PressureGuard™. The ESD system is shipped fully-lubricated and serviced.
Depending upon service type, a varying degree of maintenance is required and will be
detailed subsequently in Section 6.
(Maintenance). Troubleshooting guide is also provided
in Section 6.2.
(Troubleshooting) in an unlikely event the ESD system displays a problem.
Additional drawings and valve-specific information is provided in Appendix C
(List of Drawings).