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反作用開關(guān)型溫度控制器

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ACTION:Indirectsnap;PilotOutputPressure“snapsoff"withtemperaturerise

詳細(xì)介紹

ACTION:
Indirect snap; Pilot Output Pressure “snaps off" with temperature rise.
APPLICATION:
Used to control temperature in indirect and direct heaters, emulsion treaters, reboilers, steam generators, heat exchangers, cooler shutter controls, 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:
-30°F minimum to 400°F maximum
-34°C minimum to 204°C maximum



OPERATION:
This Thermostat consists of a Direct Acting Semi-throttle Base Assembly which is connected to a 3 PS Pilot producing an Indirect Snap Output Signal. The 3 PS Pilot also acts as an amplifier increasing the sensitivity of the Base Assembly.
Assume the set temperature of the Thermostat is above that of the system being controlled and Pilot Output Pressure (Yellow)
is being sent to any Pilot or Motor Valve. As the system temperature rises, the STAINLESS TUBE increases in length to move
the Thermostat Diaphragm Assembly in a direction to first close the seat at BALL 1 (Orange to Atmosphere) and open the seat at
BALL 2 (Violet to Orange). As Variable Pressure (Orange) increases, the 3 PS Pilot Diaphragm Assembly moves downward to close the seat at BALL 3 (Violet to Yellow) and open the seat at BALL 4 (Yellow to Atmosphere).
Venting of Pilot Output Pressure (Yellow) helps move the 3PS Pilot Diaphragm Assembly downward and thereby produces
a “snap off" action of the pilot to cause the desired Pilot or Motor Valve action.
As Variable Pressure (Orange) decreases due to decreasing
system temperature, the Pilot Diaphragm Assembly is forcedupward to close the seat at BALL 4 (Yellow to Atmosphere) and open the seat at BALL 3 (Violet to Yellow). Increasing Pilot Output Pressure (Yellow) permits the Pilot Diaphragm Assembly to move upward more rapidly, producing a “snap on" pilot action. This action allows a Motor Valve to open fully.
SUPPLY PRESSURE:
5 to 30 psig
.35 to 2.11 kg/cm2

關(guān)鍵詞：APP
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