Siemens QFM31..D Duct sensors for rel. humidity / temperature for demanding requirements
Siemens QFM31..D Duct sensors for rel. humidity / temperature for demanding requirements
• • Operating voltage AC 24 V / DC 13.5…35 V
• Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Function test
• Capacitive humidity measurement
• Range of use −40…+70 °C / 0…100 % r. h. with LCD display −25…+70 °C / 0…100 % r.h.
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Siemens VPP46..Q,Combi valves (PICV) PN25, externally threaded
systems
With integrated differential pressure controller
DN 10…DN32: Valve body made of dezincification resistant hot-pressed
brass (DZR)
DN 40…DN 50: Housing made of spheroidal graphite iron
Volumetric flow 30… 11500 l/h,
Differential pressure range 15…600 kPa
Internally threaded Rp conforming to ISO 7-1
Externally threaded G conforming to ISO 228-1
Version with pressure test points for Δp measurement (optional)
Can be equipped with electro thermal or electromotive actuators
SSA.. (3-position or DC 0…10 V)
STA..3../STP..3.. (2-position or PDM)
STA63../STP63.. (DC 0…10 V)
SAY..1P03 (3-position or DC 0…10 V)
Siemens VPE..MiniCombiValves (MCV)
Radiator valves featuring integrated differential pressure control for
2-pipe heating systems, fan coils and chilled ceiling systems
? Automatic flow limitation under all operating conditions
? Straightforward design of plant with no need for safety margins
? Thanks to MCV no hydraulic balancing within the zone required
? No additional line balancing valves required
? No noise problems
? Integrated presetting of kv-values
? DIN DN 10 and DN 15
? Valve bodies made of brass, mat nickel-plated
? Internally and externally threaded (Rp/R) conforming to ISO 7-1
? Can be combined with RTN.. thermostatic, STA..3.. electrothermal and SSA..
electromotoric actuators
Siemens MXF461.. Modulating control valves with magnetic actuators, PN 16
Fast positioning time (<2 s), high-resolution stroke (1 : 1000), high rangeability
· Equal-percentage or linear valve characteristic (user-selected)
· Operating voltage AC / DC 24 V
· Switch-selected control signal DC 0/2…10 V or DC 4…20 mA
· DC 0…20 V phase cut control signal with SEZ91.6 external interface
· Indication of operating state, position feedback and manual control
· Wear-free inductive stroke measurement
· Fail-safe feature: A ® AB closed when de-energized
· Low friction, robust, no maintenance required
Siemens MXF461.. Modulating control valves with magnetic actuators, PN 16
Fast positioning time (<2 s), high-resolution stroke (1 : 1000), high rangeability
· Equal-percentage or linear valve characteristic (user-selected)
· Operating voltage AC / DC 24 V
· Switch-selected control signal DC 0/2…10 V or DC 4…20 mA
· DC 0…20 V phase cut control signal with SEZ91.6 external interface
· Indication of operating state, position feedback and manual control
· Wear-free inductive stroke measurement
· Fail-safe feature: A ® AB closed when de-energized
· Low friction, robust, no maintenance required
Room sensors
QFA41…
for relative humidity and temperature with calibration certificates
• Operating voltage AC 24 V / DC 13.5…35 V
• Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Capacitive humidity measurement
• Recalibration service
• Test function for loop test
• Range of use −40…+70 °C / 0…100 % r. h. with LCD display −25…+70 °C / 0…100 % r. h.
Use
The QFA41… sensor is used in ventilation and air conditioning plants requiring:
• Very high accuracy and reliability for measuring relative humidity and temperature
• Regular recalibration and readjustment of the sensors
Examples:
• Storage and production facilities in the paper, textiles, pharmaceutical, chemical, electronics industries, etc.
• Laboratories
• Hospitals
• Computer centers
• Greenhouses
Universal controller with P or PI action for heating, ventilation and air conditioning.
Auxiliary functions
- PI limiter function (absolute and relative limit)
- Remote setpoint
- Setpoint compensation
- Winter/summer mode changeover (analogue or digital input)
- Cascade control
- Maximum priority for cooling / dehumidifying