Siemens QFM21.. Duct sensor for rel. humidity / temperature
Siemens QFM21.. Duct sensor for rel. humidity / temperature
Device type QFM21..
Designation Duct sensors for humidity and
temperature
Product range SymaroTM
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Siemens Modulating refrigerant valves with magnetic actuator, PN 32 M3FK..LX.. hermetically sealed, for condenser control
- Mixing or straight-through valves with magnetic actuator for modulating
capacity control of condensers.
? Short positioning time (approx. 1 s)
? High resolution
? High rangeability
? Hermetically sealed
? Versatile electrical interface
? Friction-free
? Port 1 -> 3 closed when de-energized
? Robust and maintenance-free
Siemens VPI46…Combi valves (PICV) PN25, internally 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 MXG461.. 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 QFM41.. Duct sensors for rel. humidity / temperature for demanding requirements, with calibration certificate
• 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 throughout the entire measuring range
• Capacitive humidity measurement
• Recalibration service
• Test function for loop test
• Range of use −40…+70 °C / 0…100 % r. h.
SIEMENS
Modulating refrigerant valves with magnetic actuator‚ PS43
M3FB..LX..
Soldered connection‚ hermetically sealed
•Modulating control valve for hot-gas applications for capacity control of refrigeration units and heat recovery systems
•For organic safety refrigerants
•AC 24 V operating voltage or power signal DC 0…20 V Phs (phase cut)
•Selectable electrical interface ZM.. with DC 0…10 V, DC 4…20 mA or DC 0…20 V Phs positioning signal
•High resolution and control accuracy
•Short positioning time (< 1 s)
•Port AB A closed when de-energized
•Robust and maintenance-free
•DN 15…32, kvs values 0.6…12 m3/h
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