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ET124 and ET134 Series
Specifications
This section lists the specifications for the ET124 and ET134 Series. Factory specifications are stamped on the
nameplate fastened on the regulator at the factory.
Available Configurations
Type ET124: For heater operating pressures
between 20 to 125 psi / 1.38 to
8.62 bar.
Type ET134: For heater operating pressures up to
20 psi / 1.38 bar.
Type E2T134: For heater operating pressures up
to 15 psi / 1.03 bar.
Sizes
NPS 3/8, 1/2, 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4, 5,
6, 8, 10, 12 / DN 10, 15, 20, 25, 32, 40, 50, 65, 80,
100, 125, 150, 200, 250 and 300
End Connection Styles
NPT
Maximum Operating Temperature
Type T124
Cast Iron: 450°F / 232°C
Type T134
Cast Steel: 750°F / 400°C
Cast Iron: 450°F / 232°C
Maximum Inlet Pressure
Type T124
Cast Iron: 250 psi / 17.2 bar
Type T134
Cast Steel: 600 psi / 41.4 bar
Cast Iron: 250 psi / 17.2 bar
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
Intended Purpose
The ET124 and ET134 Series temperature regulators
are designed to reduce steam pressure and regulate
the flow of steam to heater to control the temperature.
No separate reducing valve is required. The heater
pressure is automatically limited to the pressure limit
spring setting. The Type ET134 has an adjustable
range between 5 to 30 psi / 0.34 to 2.07 bar. The
Type ET214 has an adjustable range between 20
to 125 psi / 1.38 to 8.62 bar. Slight variations at the
thermostat throttle the steam pressure according to the
demand for heat.
2
(1)
(1)
Temperature Ranges
(1)
20 to 120°F / -7 to 49°C
50 to 150°F / 10 to 66°C
70 to 170°F / 21 to 77°C
120 to 220°F / 49 to 104°C
150 to 300°F / 66 to 149°C
170 to 270°F / 77 to 132°C
250 to 350°F / 121 to 177°C
Main Valve Material
Body: Cast Iron and Cast Steel
Stem, Disc, Seat: 416 Stainless steel
Gasket: Graphite
Diaphragm: 301 Stainless steel
Spring: Steel
Options
Bronze or Stainless steel Thermostat
Thermostat Well
Dial Thermometer
Tubing from 5 to 20 ft / 1.5 to 6.1 m
Integral Mount
Principle of Operation
The regulator is operated by its initial steam pressure.
The main valve is normally closed, being held so
by initial pressure on the disk and by an internal
main spring. The pilot is opened by compressing the
pressure limit spring.
When steam is turned on, it flows to the pilot up
through the top flange. See Figure 2. At the No. 8B
tee between the valve and the pilot the flow divides,
one branch being connected to bleedport No. 211,
the other to restriction elbow No. 211, the other to
restriction elbow No. 5A and the underside of the main
valve diaphragm. Bleedport No. 211 restricts the flow,
builds pressure under the diaphragm and opens the
main valve. Restriction No. 5A steadies the operation
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