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反作用截流式溫度控制器

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ACTION:Indirectthrottle;PilotOutputPressure(Yellow)decreaseswithtemperaturerise

詳細(xì)介紹

ACTION:
Indirect throttle; Pilot Output Pressure (Yellow) decreases with temperature rise.
APPLICATION:
For temperature control of indirect heaters, emulsion treaters, reboilers, steam generators, heat exchangers cooler shutter controllers,
ａnd salt bath heaters.
WORKING PRESSURE (sensing element):
psig kg/cm2
500 35.15 max. without Separable Socket
4000 281.23 max. with Separable Socket
7000 492.15 max. with Special Separable Socket
Separable Socket is an extra price item and must be ordered separately, if desired. To order Separable Sockets refer to Table of Contents.
TEMPERATURE RANGE:
T 12T, T 18T -30°F minimum to 400°F maximum
-34°C minimum to 204°C maximum
HT 12T, HT 18T -30°F minimum to 750°F maximum
-34°C minimum to 399°C maximum
HT 12T-S, HT 18T-S -30°F minimum to 750°F maximum
-34°C minimum to 399°C maximum


OPERATION:
These Thermostats each consist of a Base Assembly sending an indirect throttle signal to operate a 3 PG Pilot. The 3 PG Pilot is connected as a throttle pilot and amplifies this signal increasing the sensitivity of the Base Assembly.
Assume the set temperature of the Thermostat is above the temperature of the system being controlled and Output Pressure
(Yellow) is being sent to a Pilot or Motor Valve.
As the system temperature rises, the STAINLESS TUBE increases in length to move the Thermostat Diaphragm (or Bellows) Assembly in a direction to first close the seat at BALL 1 (Violet to Orange) and open the seat at BALL 2 (Orange to Atmosphere). As Variable Pressure (Orange) decreases the 3 PG Pilot Diaphragm Assembly moves upward to close the seat at BALL 4 (Violet to Yellow) and open the seat at BALL 3 (Yellow to Atmosphere). Pilot Output Pressure (Yellow) is vented for the desired Pilot or Motor Valve action.
As the system temperature decreases, the action is reversed to increase Pilot Output Pressure (Yellow). Due to the low modulating characteristic of a Motor Valve, the action of this controller will not be a true throttle action but will have a tendency to over ride the control point. The 112 SMT-T is the recommended Motor Valve for this thermostat configuration. Refer to “Burner Valves" in the Table of Contents for more information.
The 3 PG Pilot may be used for snap service when connected as a snapper pilot. For snap connection of the 3 PG Pilot refer to catalog section “Y".
SUPPLY PRESSURE:
5 to 30 psig
.35 to 2.11 kg/cm2


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產(chǎn)品列表
貨號(hào) 描述 溫度（F） 溫度（C） 維修包
H0109 T 12T 400 204 R1201
H0110 T 18T 400 204 R1201
H0209 HT 12T 750 399 R1218
H0210 HT 18T 750 399 R1218
H0216 HT 12T-S 750 399 R1218
H0216 HT 18T-S 750 399 R1218

3 PG 流量特性曲線



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