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Instruction Manual
VCIMD-14980
November 2021
Spence Types T124 and T134 Temperature and
Pressure Pilots
▲
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fire and/or chemical contamination
causing property damage and personal
injury or death.
Emerson temperature pilot must be
installed, operated and maintained
in accordance with federal, state and
local codes, rules and regulations
and Emerson Process Management
Regulator Technologies, Inc.
(Emerson) instructions.
If the temperature pilot 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 unqualified
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only a
qualified person shall install or service
the Types T124 and T134.
Introduction
Scope of the Manual
This manual provides instructions for installation,
maintenance and parts information for the Types T124
and T134 temperature pilot.
WARNING
Figure 1. Types T124 and T134 Temperature Pilot
Product Description
The steam pressure reducing valve and temperature
regulator in a single pilot-operated valve is a
combination of Type T124 or T134 Pilot and a Type
E or C Main Valve. Steam pressure is modulated
in proportion to temperature and load variations.
Pressure control provides fast, accurate adjustment of
heat transfer rate to demand requirements.
This pilot is primarily intended for use on
instantaneous heaters. By combining both temperature
and pressure control in one pilot, unusually close
regulation of temperature is achieved through the
anticipation of fast load changes. An additional benefit
of this pilot is that pressure reduction and temperature
control can be provided with a single regulator. For
pressures not to exceed 20 psi / 1.38 bar, Type T134
should be used. For pressures between 20 and
125 psi / 1.38 and 8.62 bar, Type T124 should
be used.
www.SpenceValve.com
Types T124 and T134
Table of Contents
Related Manuals for Emerson T124
Summary of Contents for Emerson T124
- Page 1 Type T124 or T134 Pilot and a Type adjustment and unsafe operation. Either E or C Main Valve. Steam pressure is modulated condition may result in equipment in proportion to temperature and load variations.
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Page 2: Specifications
Types T124 and T134 Specifications The Specifications section gives some general specifications for the Types T124 and T134 temperature pilots. The nameplates give detailed information for a specific pilot as built in the factory. Available Configurations Maximum Inlet Pressure Type T124: Operating pressures between 20 to Cast Iron: 250 psi / 17.2 bar... - Page 3 BLEED PORT BEND NO. 4A BLEED PORT LIMIT SPRING NO. 8B DELIVERY PRESSURE MAIN VALVE ADJUSTMENT SCREW TYPE E OR E2 1/4" CONTROL PIPE 1/4" UNION RESTRICTION BEND DO NOT INSULATE BELOW THIS LINE Figure 3. Type T124 Tubing Bends Connection...
- Page 4 BELOW THIS LINE CONDENSATION CHAMBER RESTRICTION BEND NO. 5A RESTRICTION ELBOW Figure 4. Type T124 with Valve Condensation Chamber Tubing Bends Connection All pressure equipment should be △ CAUTION installed in a non-seismic area; should not be exposed to fire; and...
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Page 5: Main Valve
Types T124 and T134 Start-up and Setting Main Valve 1. Flush the piping system thoroughly to clear it of ▲ WARNING welding beads, scale, sand, etc. 2. Mount the main valve with diaphragm chamber The pilot may be handling hazardous down and arrow on body pointing in the direction fluids. -
Page 6: Maintenance
Do not, under any circumstances, loosen pilot body. the bolts on the diaphragm chamber of the Type T124 or T134 Temperature Pilot or attempt to dismantle the thermostat Seat, Disk and Stem Replacement element. The system is filled with volatile fluid which, if lost, will render the 1. -
Page 7: Thermostat Replacement
Types T124 and T134 3. Remove the seat ring (key 15) from the body with 2. Back off temperature adjusting wheel (key 14) a socket wrench. to within a turn or two of the barrel nut (key 1). Back off pressure adjusting screw (key 20) to 4. -
Page 8: Troubleshooting
Arrange drainage of the heater by gravity or install service. Only parts manufactured by a pump to lift condensate. Emerson should be used for repairing 7. Main valve or pilot may be held open by foreign this pilot. matter. To determine which valve leaks: Failure to Open or Sagging a. -
Page 9: Parts Ordering
Types T124 and T134 Parts Ordering Description Part Number Disk When ordering parts, it is essential that the pilot type, Standard, 440 CH WAL04-01772-90 service and serial number be stated. Composition Disk, Brass Hycar WAL07-53512-00 Stem Nut Select part by item number, but order by part number. - Page 10 Types T124 and T134 THERMOSTAT ASSEMBLY, VARIES 1/8 NPT TYPE T134 SIDE VIEW FRONT VIEW Figure 6. Type T124 Assembly...
- Page 11 Types T124 and T134 COMPOSITION DISK ADJUSTMENT INDICATOR Figure 7. Type T124 Options Assembly...
- Page 12 SpenceValve.com VCIMD-14980 © 2021 Emerson Electric Co. All rights reserved. 11/21 Spence is a mark owned by one of the companies in the Emerson Automation Emerson Automation Solutions Solutions business unit of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co.