Type VMR

For the measurement of volume flow rates in ducts

Circular volume flow rate measuring units for the recording or monitoring of volume flow rates

  • Manual volume flow rate measuring
  • Permanent volume flow rate measuring
  • Recording of measured values for other controllers or for the LABCONTROL air management system
  • Pressure transducer for the automatic recording of measured values, factory assembled and complete with wiring and tubing
  • Casing air leakage to EN 15727, class C


Optional equipment and accessories

  • With flanges on both ends
  • Lip seal
  • Dynamic or static differential pressure transducers

Volume flow rate measuring unit, variant VMR/.../BB0 00181176_0


  • Application
  • Description

Application

  • Circular volume flow rate measuring units Type VMR for the manual recording or automatic measuring of volume flow rates
  • Simplified commissioning, approval and maintenance
  • Suitable for permanent installation because of low differential pressure
  • Optional static differential pressure transducer for systems with polluted air

Special characteristics

  • Measurement accuracy ± 5 %
  • Low differential pressure of only about  10 – 26 % of the measured effective pressure

Nominal sizes

  • 100, 125, 160, 200, 250, 315, 400

Variants

  • VMR: Volume flow rate measuring unit
  • VMR-FL: Volume flow rate measuring unit with flanges on both ends

Construction

  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)
  • A2: Stainless steel

Parts and characteristics

  • Ready-to-commission unit which consists of the mechanical parts and an optional pressure transducer
  • Averaging differential pressure sensor for volume flow rate measurement
  • Optional factory-assembled pressure transducers complete with wiring and tubing
  • High measurement accuracy (even with upstream bend R = 1D).

Attachments

  • Dynamic differential pressure transducer
  • Static differential pressure transducer
  • LABCONTROL: Components for air management systems

Accessories

  • Lip seals on both ends (factory fitted)
  • Matching flanges for both ends

Construction features

  • Circular casing
  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal
  • Connecting nipple for tubes with 6 mm inside diameter
  • VMR-FL: Circular flanges to EN 12220

Materials and surfaces

Galvanised sheet steel construction

  • Casing made of galvanised sheet steel
  • Aluminium sensor tubes


Powder-coated construction (P1)

  • Casing made of galvanised sheet steel, powder-coated
  • Sensor tubes made of aluminium, powder-coated


Stainless steel construction (A2)

  • Casing made of stainless steel 1.4301
  • Sensor tubes made of aluminium, powder-coated

Standards and guidelines

  • Hygiene conforms to VDI 6022
  • Casing air leakage to EN 15727, class C

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Zero point correction of the static differential pressure transducer should be carried out once per year (recommendation)

Technical information

Function, Technical data, Specification text, Order code, Produktbeziehungen

  • Function
  • Technical data
  • Specification text
  • Order code

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

100 – 400 mm

Volume flow rate range

10 – 1680 l/s or 36 – 6048 m³/h

Measurement accuracy

± 5 % of the measured value

Effective pressure range

approx. 5 – 250 Pa

Measuring unit differential pressure (pressure loss)

10 – 26 % of the measured effective pressure

Operating temperature

10 – 50 °C




Circular volume flow rate measuring unit for the measurement of volume flow rates in air conditioning systems, available in 7 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.

Differential pressure sensor with 3 mm measuring holes, thus resistant to dust and pollution.

Both ends spigot with groove for lip seal, suitable for connecting ducts to EN 1506 or EN 13180.

Casing air leakage to EN 1751, class C.

Special characteristics

  • Measurement accuracy ± 5 %
  • Low differential pressure of only about  10 – 26 % of the measured effective pressure

Materials and surfaces

Galvanised sheet steel construction

  • Casing made of galvanised sheet steel
  • Aluminium sensor tubes


Powder-coated construction (P1)

  • Casing made of galvanised sheet steel, powder-coated
  • Sensor tubes made of aluminium, powder-coated


Stainless steel construction (A2)

  • Casing made of stainless steel 1.4301
  • Sensor tubes made of aluminium, powder-coated

Construction

  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)
  • A2: Stainless steel

Technical data

  • Nominal sizes: 100 to 400 mm
  • Volume flow rate range: 10 to 1680 l/s or 36 to 6048 m³/h
  • Effective pressure range: approx. 5 – 250 Pa
  • Measuring unit differential pressure (pressure loss): 10 – 26 % of the measured effective pressure
  • Operating temperature: 10 to 50 °C

Attachments

Volume flow rate measurement with static differential pressure transducer emitting an actual value signal for integration into the central BMS.

  • Supply voltage 24 V AC/DC
  • Signal voltages 0 – 10 V DC or 2 – 10 V DC
  • EASYLAB: Integration using either 0 – 10 V DC signals or expansion modules (LonWorks, BACnet MS/TP, Modbus RTU)

Sizing data

  • V _______________________ [m³/h]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Notes on the order code

VMR/.../ELAB/FH-*

  • VMR volume flow rate measuring units with EASYLAB TCU3 controllers are not certified for use with fume cupboards to EN 14175, part 6 (Fume cupboards – Variable air volume fume cupboards)

Order example: VMR/160/D2/B10/E0

Nominal size

160 mm

Accessories

Lip seals on both ends

Differential pressure transducer

Dynamic

Actual value signal

0 – 10 V


Order example: VMR/160/D2/B10/E0

Nominal size

160 mm

Accessories

Lip seals on both ends

Differential pressure transducer

Dynamic

Actual value signal

0 – 10 V


Order example: VMR/160/D2/B10/E0

Nominal size

160 mm

Accessories

Lip seals on both ends

Differential pressure transducer

Dynamic

Actual value signal

0 – 10 V


 

Variants, Attachments, Dimensions and weight

  • Variants
  • Attachments
  • Dimensions and weight

VMR

  • Volume flow rate measuring unit
  • Spigot to make connections to the ducting

VMR-FL

  • Volume flow rate measuring unit
  • With flanges on both ends to make detachable connections to the ducting

Materials

Order code detail Part Material Notes

Casing

Galvanised sheet steel


Sensor tubes

Aluminium


P1

Casing

Galvanised sheet steel


A2

Casing

Stainless steel, material no. 1.4301



Surfaces

Order code detail Part Surface Notes

Casing

Untreated


Sensor tubes

Untreated


P1

Casing

Powder-coated, RAL 7001, silver grey


P1

Sensor tubes

Powder-coated, RAL 7001, silver grey


A2

Casing

Untreated


A2

Sensor tubes

Powder-coated, RAL 7001, silver grey



VMR, VARYCONTROL differential pressure transducers

Order code detail Differential pressure transducer Measurement principle

Universal



B10

Universal controller with integral differential pressure transducer TROX/Belimo

Dynamic

BB0

Universal controller with separate differential pressure transducer TROX/Belimo

Static


VMR, LABCONTROL differential pressure transducers

Order code detail Differential pressure transducer Measurement principle

EASYLAB



ELAB

EASYLAB TCU3 (recording of measured values for EASYLAB system)

Static


Anbauteile: VARYCONTROL Regelkomponenten

Regel- größe Schnittstelle Vmin -/ Vmax - Verstellung Differenzdruck- transmitter Stellantrieb Fabrikat


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

BB3

V



Separates Bauteil

Stellantrieb

① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens

☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck


VMR

Nominal size
VMR
ØD
mm
VMR
m
kg
100 99 0.8
125 124 1.0
160 159 1.4
200 199 1.7
250 249 2.1
315 314 2.7
400 399 3.4


VMR-FL

Nominal size
ØD
mm
ØD1
mm
ØD2
mm
n
T
mm
m
kg
100 99 132 152 4 4 1.2
125 124 157 177 4 4 1.5
160 159 192 212 6 4 2.1
200 199 233 253 6 4 2.7
250 249 283 303 6 4 3.3
315 314 352 378 8 4 4.5
400 399 438 464 8 4 5.7


Installation details, Commissioning, Basic information and nomenclature

  • Installation details
  • Commissioning
  • Basic information and nomenclature

Installation and commissioning

  • Any installation orientation (except units with static differential pressure transducer)
  • Note the upstream conditions
  • Static differential pressure transducer: Check zero point and correct, if necessary

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

Attachments
Attachments mm

Without attachments

200

200

200

VARYCONTROL




Universal controller

250

200

250

LABCONTROL




EASYLAB

370

350

400


Calculation conditions

  • The volume flow rate is calculated based on the measured effective pressure.
  • The effective pressure is measured using an electronic manometer or an inclined tube manometer
  • Air density ρ = 1.2 kg/m³

Given data

  • VMR/160
  • Δpw = 100 Pa (manometer reading of effective pressure)
  • Volume flow rate V [m³/h]

Unit data

  • K value from table: K = 57 m³/h (15.9 l/s)

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

Share page

Recommend this page

Recommend this page by sending a link by mail.

Fields marked with an (*) are required fields.

Share page

Thank you for your recommendation!

Your recommendation has been sent and should arrive shortly.


Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request
Tel.: +7 495 221-5161 | Fax: +7 495 221-5171

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +7 495 221-5161 | Fax: +7 495 221-5171

Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request
Tel.: +7 495 221-5161 | Fax: +7 495 221-5171

Attachment (max. 10MB)

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +7 495 221-5161 | Fax: +7 495 221-5171