Application
Special features
Nominal sizes
Variants
Parts and characteristics
Attachments
Accessories
Construction features
Materials and surfaces
Standards and guidelines
Maintenance
Functional description
The measuring unit is fitted with an effective pressure sensor for measuring the volume flow rate.
The effective pressure is either measured and evaluated manually, or transformed into an electric signal by a pressure transducer.
Nominal sizes | 125 – 400 mm |
Volume flow rate range | 25 – 1680 l/s or 90 – 6048 m³/h |
Measurement accuracy | ± 5 % of the measured value |
Effective pressure range | approx. 5 – 250 Pa |
Measuring unit differential pressure (pressure loss) | 15 – 24 % of the measured effective pressure |
Operating temperature | 10 – 50 °C |
Plastic (PPs) circular volume flow rate measuring unit for the measurement of volume flow rates in air conditioning systems, available in 6 nominal sizes.
For the manual volume flow rate measuring or for the permanent monitoring of the actual value signal.
Ready-to-commission unit which consists of the casing with an averaging differential pressure sensor.
Spigot, suitable for ducts according to DIN 8077.
Casing air leakage to EN 15727, class C.
Special features
Materials and surfaces
Technical data
Attachments
Volume flow rate measurement with static differential pressure transducer emitting an actual value signal for integration into the central BMS.
Sizing data
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
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Notes on the order code
VMRK/.../ELAB/FH-*
Order example: VMRK/160/BB0
Nominal size | 160 mm |
Differential pressure transducer | Static |
VMRK, VARYCONTROL differential pressure transducers
Universal | ||
BB0 | Universal controller with separate differential pressure transducer TROX/Belimo | Static |
VMRK, LABCONTROL differential pressure transducers
EASYLAB | ||
ELAB | EASYLAB TCU3 (recording of measured values for EASYLAB system) | Static |
Anbauteile: VARYCONTROL Regelkomponenten
Easylabregler | Statisch | |||||
Elab | RS, RE, PC, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elab | RS, PC, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elab | RE, PC, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elab | RS, RE, PC, FH, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elektronischer Regler | Statisch | Elektronischer Regler | ||||
TMA | RS, RE, PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RS, RE, PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
TMA | RS, RE, | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RS, RE, | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
TMA | RE ,PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RE ,PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
TMA | RS, RE ,PC, FH | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RS, RE ,PC, FH | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
XF3 | Δp | Integriert, 600 Pa | Federrücklaufantrieb | ③ | ||
BB3 | V | Separates Bauteil | Stellantrieb | ② |
① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens
☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck
VMRK
mm | mm | mm | mm | kg | |
VMRK-FL
mm | mm | mm | mm | mm | mm | mm | kg | ||
Installation and commissioning
Upstream conditions
The volume flow rate accuracy ΔV applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream.
Space required for commissioning and maintenance
Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.
Space required
Without attachments | 200 | 200 | 200 |
VARYCONTROL | |||
Universal controller | 300 | 320 | 300 |
LABCONTROL | |||
EASYLAB | 370 | 350 | 400 |
Space required
125 – 200 | 100 | 100 | D |
250 – 400 | 100 | 160 | D |
D: Casing diameter
Calculation conditions
Given data
Unit data
Principal dimensions
ØD [mm]
VAV terminal units made of stainless steel: Outer diameter of the spigot
VAV terminal units made of plastic: Inside diameter of the connecting spigot
ØD₁ [mm]
Pitch circle diameter of flanges
ØD₂ [mm]
Outer diameter of flanges
ØD₄ [mm]
Inside diameter of the screw holes of flanges
L [mm]
Length of unit including connecting spigot
L₁ [mm]
Length of casing or acoustic cladding
B [mm]
Duct width
B₁ [mm]
Screw hole pitch of flange (horizontal)
B₂ [mm]
Outside dimension of flange (width)
B₃ [mm]
Width of device
H [mm]
Duct height
H₁ [mm]
Screw hole pitch of flange (vertical)
H₂ [mm]
Outside dimension of flange (height)
H₃ [mm]
Unit height
n [ ]
Number of flange screw holes
T [mm]
Flange thickness
m [kg]
Weight including attachments for the automatic differential pressure measurement
Nomenclature
Vnom [m³/h] and [l/s]
Nominal volume flow rate (100 %)
Vmin [m³/h] and [l/s]
Volume flow rate
ΔV [± %]
Volume flow rate accuracy
K value [m³/h] and [l/s]
Unit-related constant for air density 1.2 kg/m³
Δpw [Pa]
Effective pressure
Δpst [%]
Static differential pressure in relation to the measured effective pressure
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Contatti
Siamo qui per te
Specifichi il suo messaggio ed il tipo di richiesta
Tel.: +39 029829741 | Fax: +39 0298297460
Contatti
Grazie per il tuo messaggio!
Il tuo messaggio è stato inviato e sarà processato a breve.
Il nostro dipartimento per la gestione delle richieste ti contatterà appena possibile.
Per domande di carattere generale riguardanti i nostri prodotti o servizi, è possibile contattare:
Tel.: +39 029829741 | Fax: +39 029829760