Danfoss Steam Solenoid Valves. Danfoss Externally Operated Valves. Danfoss Solenoid Coils. Din Plug Connectors. Danfoss Temperature Switches. Danfoss Differential Temperature Switches. Danfoss Contactors CI Series. Danfoss Direct Online Motor Starters. Danfoss Electronic Contactors. Danfoss Electronic Motor Starters. Danfoss Electronic Soft Starters. Danfoss Electronic Timers. Danfoss Overload Relays.
Danfoss Spare Parts For Contactors. Danfoss AVTA. Standard pressure switches Pressure switches for steam plant approved by Vd TUV Pressure switches with adjustable neutral zone Differential pressure switches. Technical data and code nos. When ordering, please state type and code The type designation number. Technical data and ordering The designation letters mean: A: Units suitable for ammonia.
B: Safety units with external resetW: Units for control purposes. Contact function, setting for rising pressure. RT 19, RT 30 and pressure switches with max. Alarm for rising pressure given at the set range value.
When the pressure exceeds the set range value, contacts make and contact brake. The contacts changeover to their initial position when the pressure falls to the range value minus the differential see fig.
Alarm for falling pressure given at the set range value minus the differential. Scale setting Mechanical differential Units with Data sheet Pressure switch, RT Function continuation Example I An extra cooling water pump must start if the cooling water pressure falls below 6 bar, and must stop when the pressure exceeds 7 bar.
Choose an RT with a range of 1 - 10 bar and an adjustable differential of 0. The start pressure of 6 bar must be set on the range scale. According to fig. Example 2 The burner on a steam boiler must cut out In addition, the tube between the RT and the air bell must be absolutely airtight. If only an indication is required, the bell can be placed mm below the max. The RT must be set at 0 cm wg and the differential disc This enables the units to be used for floating control.
The terminology involved is explained below. Floating control A form of discontinuous control where the correcting element e. Hunting Periodic variations of In this case, the pump must be up and downregulated at 32 m and 25 m wg. Greyed out shipping options indicate services not available, as the certain criteria has not been met. Our technical team can help find an alternative! Fill in the below to get started.
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