Emerson 289 Series Relief Valves / Backpressure Regulators- User Manual
Emerson 289 Series Relief Valves / Backpressure Regulators– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – Principle of Operation; gas velocity through the orifice creates an area of; Installation; WarnIng; Specifications; Use qualified personnel when installing, operating
- Page 3 – Figures 6 through 10) must first be removed: the; hazardous or flammable gas service,; relief valve so that the flow through it will match; Startup
- Page 4 – configurations of similar construction. Refer to the
- Page 6 – avoid personal injury or property; To remove the orifice (key 10) unscrew it from
- Page 7 – Parts Orderin; When corresponding with your local Sales Office about
- Page 8 – Parts List
289 Series
D100280X012
Instruction Manual
Form 1724
October 2014
www.fisherregulators.com
289 Series relief Valves
!
WarnIng
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or fi re causing property damage and
personal injury or death.
Fisher
®
relief valves must be installed,
operated and maintained in accordance
with federal, state and local codes,
rules and regulations and
manufacturer’s instructions.
If a leak develops or if the outlet
continually vents gas, service to the
unit may be required. Failure to correct
trouble could result in a hazardous
condition. Only a qualifi ed person must
install or service the unit.
Call a gas service person to service the
unit. Only a qualifi ed person must install
or service the regulator.
Introduction
Scope of the Manual
This manual provides instructions for installation,
maintenance and parts ordering information for
the 289 Series relief valves. Instructions for other
equipment used with these relief valves can be
found in separate instruction manuals.
Description
The 289 Series pressure relief valves (see Figure 1)
are throttling relief valves used downstream of
pressure regulators to protect the downstream system
from overpressure. These relief valves can be used for
natural gas, air, propane or other noncorrosive, gas-
fl ow service.
Figure 1. Type 289H Relief Valves
2 nPT TyPe 289H
18702
1 nPT TyPe 289H
W18701
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Summary
289 Series 2 Principle of Operation Refer to Figures 2 and 4. The 289 Series Relief valves are to be installed (between large service regulators such as S202G or S302G Series) so the outlet is piped downstream to relieve excess pressure to the atmosphere. As inlet pressure increases, the spring is c...
289 Series 3 rain caps or elbow piping (see Figure 4), must be attached to the outlet to keep the relief valve from getting plugged or from collecting moisture, corrosive chemicals or other foreign materials. If piping is to be attached to the valve outlet, the following parts (if they are connected...
289 Series 4 removed. antiseizing sealant should be applied to the adjusting screw (key 6) threads on valves without closing caps. If set pressure adjustment is necessary, monitor the inlet pressure with a gauge during the adjustment procedure. Remove the closing cap (key 14) or loosen the hex nut (...
