Emerson CROSBY HE ISOFLEX Series Installation, Maintenance And Adjustment Instructions

CROSBY SERIES HE ISOFLEX
INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS

TABLE OF CONTENTS

1. Introduction ....................................................3
2. Factory preparation of welded inlet
valves for shipment ........................................3
3. Preparation of valve for service .....................3
4. Initial valve assembly .....................................5
5. Description of operation ................................7
6. Set pressure testing and adjustment ...........8
7. Valve maintenance .........................................9
8. Repair procedure .........................................11
9. Valve assembly .............................................14
10. Spare parts ...................................................15
11. Field service recommendations ..................15
12. Maintenance equipment ..............................16
SAFETY
The safety of lives and property often depends
on the proper operation of the safety valves.
Consequently, the valves should be kept
clean and should be tested periodically and
reconditioned to make sure they function
properly.
Emerson.com/FinalControl
SELF-ACTUATED SAFETY VALVES
®
WARNING
Suitability of the material and product for the use
contemplated by the buyer is the sole responsibility
of the buyer. Also storage, installation and proper
use and application are the sole responsibility of the
purchaser. Emerson disclaims any and all liability
arising out of the same.
Any installation, maintenance, adjustment, repair
and testing performed on safety relief valves should
be done in accordance with the requirements of
all applicable codes and standards under which
those performing such work should maintain
proper authorization through appropriate governing
authorities. No repair, assembly and test work
done by other than Emerson shall be covered
by the warranty extended by Emerson to its
customers. You assume full responsibility for your
work. In maintaining and repairing Crosby products
you should use only parts manufactured by
Emerson. Call your nearest Emerson sales office
or our factory for a Crosby valve service engineer
should you wish assistance with your field needs.
SAFETY PRECAUTIONS
Proper installation, maintenance and operation
is essential to the safe and reliable operation of
all pressure relief products.
Precautionary statements in the form of
warnings, cautions and notes are used in this
manual to emphasize important and critical
instructions where applicable.
Examples:
WARNING
An operating procedure or practice which, if not
observed strictly, may result in injury to personnel
or loss of life.
CAUTION
An operating procedure or practice which, if not
observed strictly, may result in damage to or
destruction of equipment.
© 2017 Emerson. All Rights Reserved.
NOTE
An operating procedure or condition which is
highlighted, underlined or printed in bold type for
emphasis.
These precautionary statements are not
exhaustive. Emerson cannot possibly
know, evaluate and advise customers of all
conceivable ways in which tasks might be
performed, or of the possible hazardous
consequences of each way. Consequently,
Emerson has not included such comprehensive
evaluation and disclaims liability for work
performed by other than Emerson personnel.
All personnel working with Crosby products
should be trained adequately and be thoroughly
familiar with the contents of this manual.
Emerson cannot evaluate all conditions that
might injure personnel or damage equipment.
However, Emerson does offer the following
general safety precautions:
- Hearing and eye protection should be used
when working on a valve which is under
pressure.
- Never strike a valve which is under pressure.
Premature actuation can result.
- Never stand in front of the discharge outlet
of a pressure relief valve which is under
pressure.
Always approach and use any pressure relief
valve with great care.
Engineering Doc. #IS-V 3155B
VCIOM-01067-EN 18/08