Emerson 122A- User Manual
Emerson 122A– 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 – Specifications; Principle of Operation; Refer to Figure 2. The flow through the Type 122A
- Page 4 – Installation; Overpressure Protection; WARNING; Maintenance; WARNING
- Page 5 – Parts Ordering; When corresponding with your local Sales Office
- Page 6 – Parts List
Type 122A
D100263X012
March 2013
Instruction Manual
Form 2279
www.fisherregulators.com
Type 122A Three-Way Switching Valve
!
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fi re and/or chemical contamination
causing property damage and personal
injury or death.
Fisher
®
switching valves must be
installed, operated, and maintained
in accordance with federal, state, and
local codes, rules and regulations,
and Emerson Process Management
Regulator Technologies, Inc. (Regulator
Technologies) instructions.
If the switching valve vents gas or a
leak develops in the system, service
to the unit may be required. Failure
to correct trouble could result in a
hazardous condition.
Installation, operation, and maintenance
procedures performed by unqualifi ed
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only
qualifi ed personnel shall install, operate,
and maintain the Type 122A three-way
switching valve.
Introduction
Scope of the Manual
This instruction manual includes installation,
adjustment, maintenance, and parts ordering
information for the Type 122A three-way
switching valve.
Description
The Type 122A three-way switching valve (see
Figure 1) is a high-capacity, economical three-way
pneumatic switching valve for on-off applications. This
valve can be used for diverging or converging gaseous
service, diverging liquid service with gas-loaded
liquids, and converging liquid service. Six spring
ranges are available for control pressures from 3 to
150 psig / 0.21 to 10.3 bar.
Figure 1. Type 122A Three-Way Switching Valve
W3141-1
"Loading the manual" means you need to wait until the file loads and becomes available for online reading. Some manuals are very large, and the time they take to appear depends on your internet speed.
Summary
Type 122A 2 Specifications The Specifications section lists the specifications for Type 122A three-way switching valve. Factory specification is stamped on the nameplate fastened on the valve at the factory. Table 1. Set Pressure Ranges SET PRESSURE RANGES PRESSURE BUILD-UP ABOVE SETPOINT REQUIRED F...
Type 122A 4 Installation ! WARNING To avoid personal injury or equipment damage caused by bursting of pressure-retaining parts or explosion of accumulated gas, do not exceed the pressure or temperature limits in Specifications, and do not use the Type 122A valve for installations where water hammer ...
Type 122A 5 Disassembly 1. Loosen the locknut (key 30). Rotate the adjusting screw (key 7) counterclockwise until all compression has been relieved from the spring (key 3). 2. Disconnect piping from the bottom connector (key 36). Unscrew and remove the bottom connector. 3. To remove the lower seat r...
