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©Emerson Process Management Regulator Technologies, Inc,. 1986, 2010; All Rights Reserved
The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls, Inc., a
business of Emerson Process Management.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or
guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications of such
products at any time without notice.
Emerson Process Management does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson
Process Management product remains solely with the purchaser.
For further information visit www.sherregulators.com/lp
USA - Headquarters
McKinney, Texas 75069-1872 USA
Telephone: 1 (800) 558-5853
Telephone: 1 (972) 548-3574
Types 912H, N, Y200H, N, and R922N
®
Visually inspect the regulator each time a gas delivery
is made for:
1. Improper installation.
2. Plugged or frozen vent.
3. Wrong regulator or no regulator in the system.
4. Internal or external corrosion.
5. Age of the regulator.
6. Any other condition that could cause the
uncontrolled escape of gas.
Failure to do the above could result in personal injury
or property damage.
Make sure the regulator vent, vent assembly, or vent
tube does not become plugged by mud, insects, ice,
snow, paint, etc. The vent screen aids in keeping the
vent from becoming plugged, and the screen should
be clean and properly installed.
Replace any regulators that have had water in their
spring case or show evidence of external or internal
corrosion. Checking for internal corrosion may
require complete removal of the adjusting screw
and shutdown of the gas system. Closely examine
regulators directly connected to the container valve by
means of a solid POL adapter (horizontal mounting) for
signs of corrosion. Correct any improper installations.
Older regulators are more likely to catastrophically
fail because of worn or corroded parts. Replace
regulators over 15 years of age; other service or
environmental conditions may dictate replacement of
the regulator before it becomes 15 years old, refer to
Fisher Bulletin LP-32.
Regulators that have been disassembled for repair
must be tested for proper operation before being
returned to service. Fisher Type Y499-2 test rack
can be furnished for this purpose. Only parts
manufactured by Fisher should be used for the repair
of Fisher regulators. Be sure to give the complete
type number of the regulator when corresponding with
the factory.
!