• Linear flow controls VFC Linear flow controls with actuator IFC (EN)

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    • Linear flow controls VFC
    Linear flow controls with actuator IFC

    Technical Information
    • Linear relationship between adjustment angle and flow rate
    • Large control ratio of 25:1
    • Actuators IC 20 or IC 40 mounted directly
    • Actuator IC 30 (24 V DC) can be mounted
    • For gas and air
    • Low leakage rates
    • High control accuracy
    • EU certified

    Edition 11.22 · EN
    03251345

    1 Application

    VFC

    The linear flow control is designed to adjust volumes of gas and cold air on various appliances.

    VFC with IC 30

    Actuator IC 30 (24 V DC) can also be combined with a VFC.

    Linear flow control VFC and actuator IC 30 are supplied separately.

    IFC

    The IFC is composed of linear flow control VFC and actuator IC 20 or IC 40.

    The IFC is designed for control ratios up to 25:1 and is suitable for regulating flow rates for modulating-controlled or stage-controlled combustion processes.

    Actuator IC 20 is controlled by a modulating signal or three-point step signal. Actuator IC 40 offers additional functions. It can be adjusted using the BCSoft programming software via an optical interface. The control type (two-point signal, three-point step signal or continuous control), running times, angles of rotation and intermediate positions can thus be programmed.

    Linear flow control VFC and actuator IC 20 or IC 40 can be supplied separately or assembled.

    Subsequent assembly with the actuator using 2 screws can be carried out either before or after installation of the linear flow control in the pipework.

    1.1 Application examples

    1.1.1 Lambda control

    If the burner is to be operated with different lambda values for process reasons, the IFC can be used to correct the lambda value.

    1.1.2 Adjusting the burner capacity

    In pneumatic ratio control systems, the IFC with actuator IC 20..E determines the air volume for the required burner capacity.

    The fine-adjusting valve VMV is used to adjust the high-fire rate.

    1.1.3 Zone control

    After being released by the burner control unit, the gas solenoid valves open and the IFC is set to ignition position. The burner is ignited by the burner control unit BCU. The gas flow rate can be adjusted continuously using the IFC. The air flow rate remains constant.

    1.1.4 Excess air burner

    After initiating the burner control unit, the IFC moves to ignition position. The burner is ignited by the burner control unit BCU. The gas flow rate can be adjusted continuously using the IFC. The air flow rate remains constant.

    2 Certification

    2.1 Certificate download

    Certificates for VFC – see www.docuthek.com

    Certificates for IC – see www.docuthek.com

    2.2 EU certified

    VFC

    • (EU) 2016/426 (GAR), Gas Appliances Regulation

    IC 20, IC 40

    • 2014/35/EU (LVD), Low Voltage Directive
    • 2014/30/EU (EMC), Electromagnetic Compatibility Directive

    2.3 UKCA certified

    Gas Appliances (Product Safety and Metrology etc. (Amendment etc.) (EU Exit) Regulations 2019)

    BS EN 13611:2015

    2.4 Eurasian Customs Union

    The products VFC, IFC meet the technical specifications of the Eurasian Customs Union.

    3 Function

    Linear flow control VFC

    The linear flow control VFC uses the rotary valve principle. A flow control cylinder with an opening specially designed for linear flow is installed in the flow body. This flow control cylinder sets the desired flow rate, Flow rate, by being turned. The maximum flow can be limited in broad ranges by means of a flow restricting cylinder. This allows optimum adaptation to the capacity required, without limiting control quality. Adjustment is carried out using an adjusting spindle.

    4 Flow rate

    1 = natural gas (ρ = 0.80 kg/m3)
    2 = propane (ρ = 2.01 kg/m3)
    3 = air (ρ = 1.29 kg/m3)

    The characteristic curves are measured at 15°C (59°F) with a measurement set-up in accordance with the standards EN 13611/EN 161. This involves measuring the pressure 5 × DN upstream and downstream of the unit under test. The pressure drop of the pipe is also measured but is not compensated for.

    Dotted line: max. flow rate with flow restricting cylinder closed.

    Left curve: max. flow rate limited by flow restricting cylinder.

    Right curve: max. flow rate with no limitation.

    4.1 Calculating the nominal size

    A web app for calculating the nominal size is available at www.adlatus.org.

    4.2 kv value

    The size of the flow control cylinder is determined using the flow rate diagram or by calculation using the kv value.

    Q(n) = flow rate (standard state) [m3/h]

    kvv = valve coefficient

    Δp = pressure loss [bar]

    pd = outlet pressure (absolute) [bar]

    ρn = density [kg/m3]] (air 1.29/natural gas 0.83/propane 2.01/butane 2.71)

    T = medium temperature (absolute) [K]

    Type kv value
    Closed Open, restricted Open, not restricted
    VFC 115/15-08 0.2 1.38 2.87
    VFC 120/20-15 0.2 4.31 7.55
    VFC 125/25-20 0.2 8.92 16.3
    VFC 340/40-25 0.5 15.41 20.68
    VFC 340/40-32 0.5 21.80 32.38
    VFC 350/50-32 0.5 21.92 32.46
    VFC 350/50-40 0.7 34.75 56.63
    VFC 365/65-40 0.7 33.89 58.05

    The flow rate can be set using the integrated flow restricting cylinder.

    5 Selection

    5.1 ProFi

    A web app selecting the correct product is available at www.adlatus.org.

    5.2 Linear flow controls with actuator IFC

    5.2.1 Selection table

    Option IFC 1 IFC 1T IFC 3 IFC 3T
    DN – inlet –, 10, 15, 20, 25 –, 10, 15, 20, 25 –, 40, 50, 65 –, 40, 50, 65
    DN – outlet /–, /10, /15, /20, /25 /–, /10, /15, /20, /25 /–, /40, /50, /65 /–, /40, /50, /65
    Pipe connection R N R, F* N
    Inlet pressure 05 05 05 05
    Cylinder -08, -15, -20 -08, -15, -20 -25, -32, -40 -25, -32, -40
    Accessories, right, inlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4
    Accessories, right, outlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4
    Accessories, left, inlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4
    Accessories, left, outlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4
    Actuator IC /20, /40 /20, /40 /20, /40 /20, /40
    Running time in s/90° -07, -15, -30, -60 -07, -15, -30, -60 -07, -15, -30, -60 -07, -15, -30, -60
    Mains voltage W, Q, A W, Q, A W, Q, A W, Q, A
    Torque 2, 3 2, 3 2, 3 2, 3
    Control T, E, D, A T, E, D, A T, E, D, A T, E, D, A
    Feedback potentiometer R10 R10 R10 R10

    * Only available for IFC 350

    Order example

    IFC 115/15R05-15PPMM/20-60W3T

    5.2.2 Type code IFC

    IFC
    Linear flow control with actuator
    1, 3
    Sizes
    T
    T-product
    10–50
    Inlet flange nominal size
    /10–/50
    Outlet flange nominal size
    R
    Rp internal thread
    F
    Flange to ISO 7005
    N
    NPT internal thread
    05
    pu max. 500 mbar
    -08, -15, -20, -25, -32, -40
    Cylinder
    P
    Accessory, right, inlet: screw plug
    M
    Accessory, right, inlet: pressure test point
    1
    Accessory, right, inlet: pressure switch DG 17/VC
    2
    Accessory, right, inlet: pressure switch DG 40/VC
    3
    Accessory, right, inlet: pressure switch DG 110/VC
    4
    Accessory, right, inlet: pressure switch DG 300/VC
    P
    Accessory, right, outlet: screw plug
    M
    Accessory, right, outlet: pressure test point
    1
    Accessory, right, outlet: pressure switch DG 17/VC
    2
    Accessory, right, outlet: pressure switch DG 40/VC
    3
    Accessory, right, outlet: pressure switch DG 110/VC
    4
    Accessory, right, outlet: pressure switch DG 300/VC
    P, M, 1, 2, 3, 4
    The same accessories can be selected for the left- or right-hand side.
    /20
    Actuator IC 20
    /40
    Actuator IC 40
    07-60
    Running time in s/90°
    W
    Mains voltage 230 V AC, 50/60 Hz
    Q
    Mains voltage 120 V AC, 50/60 Hz
    A
    Mains voltage 100–230 V AC, 50/60 Hz
    2
    Torque 2.5 Nm
    3
    Torque 3 Nm
    T
    Three-point step control
    E
    Controlled by continuous signal
    D
    Digital input
    A
    4–20 mA analogue input
    R10
    With 1000 Ω feedback potentiometer
    P
    Parameter set No.
    -I
    Cable glands on the inlet side (no specification: on the outlet side)

    5.3 Linear flow controls VFC

    5.3.1 Selection table

    Option VFC 1 VFC 1T VFC 3 VFC 3T
    DN – inlet –, 10, 15, 20, 25 –, 10, 15, 20, 25 –, 40, 50, 65 –, 40, 50, 65
    DN – outlet /–, /10, /15, /20, /25 /–, /10, /15, /20, /25 /–, /40, /50, /65 /–, /40, /50, /65
    Pipe connection R N R, F* N
    Inlet pressure 05 05 05 05
    Cylinder -08, -15, -20 -08, -15, -20 -25, -32, -40 -25, -32, -40
    Accessories, right, inlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4
    Accessories, right, outlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4
    Accessories, left, inlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4
    Accessories, left, outlet P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4 P, M, 1, 2, 3, 4

    * Only available for VFC 350

    Order example

    VFC 115/15R05-15PPMM

    5.3.2 Type code VFC

    VFC
    Linear flow control
    1, 3
    Sizes
    T
    T-product
    10–65
    Inlet flange nominal size
    /10–/65
    Outlet flange nominal size
    R
    Rp internal thread
    F
    Flange to ISO 7005
    N
    NPT internal thread
    05-
    pu max. 500 mbar
    08-40
    Cylinder
    P
    Accessory, right, inlet: screw plug
    M
    Accessory, right, inlet: pressure test point
    1
    Accessory, right, inlet: pressure switch DG 17/VC
    2
    Accessory, right, inlet: pressure switch DG 40/VC
    3
    Accessory, right, inlet: pressure switch DG 110/VC
    4
    Accessory, right, inlet: pressure switch DG 300/VC
    P
    Accessory, right, outlet: screw plug
    M
    Accessory, right, outlet: pressure test point
    1
    Accessory, right, outlet: pressure switch DG 17/VC
    2
    Accessory, right, outlet: pressure switch DG 40/VC
    3
    Accessory, right, outlet: pressure switch DG 110/VC
    4
    Accessory, right, outlet: pressure switch DG 300/VC
    P, M, 1, 2, 3, 4
    The same accessories can be selected for the left- or right-hand side.

    5.4 Control characteristic

    In order for the IFC to be able to influence the flow rate, a proportion of the pressure loss ∆p of the entire system has to be caused by the linear flow control. Taking into consideration the fact that the overall pressure loss ∆p should be kept to a minimum, a control characteristic/valve authority a = 0.3 is recommended for the IFC. This means that of the overall inlet pressure, there is a 30% drop on the fully opened IFC.

    Example

    We want to find the IFC for gas to be used for modulating control of a gas burner:

    ∆p on the IFC is determined using the control characteristic a and the outlet pressure pd.

    Recommended control characteristic a = 0.3.

    Outlet pressure: pd = 30 mbar

    Gas flow rate: Q(n) = 20 m3/h

    Control characteristic: a = 0.3.

    Select the appropriate IFC for the required flow rate Q(n) = 20 m3/h and the calculated ∆p = 13 mbar:
    IFC 1..-15, Flow rate.

    6 Project planning information

    6.1 Installation

    The inlet pressure pu and the outlet pressure pd can be measured at the pressure test points.

    Actuators IC 20, IC 30, IC 40 and the linear flow control VFC must not be in contact with masonry. Minimum clearance 20 mm (0.787").

    Do not store or install the unit in the open air.

    Sealing material and thread cuttings must not be allowed to get into the flow body. A filter or dirt trap must be installed upstream of every system.

    IC 20, IC 40 with VFC

    Linear flow control VFC and actuators IC 20 and IC 40 can be supplied separately or assembled. Easy assembly with the actuator using 2 screws can be carried out either before or after installation of the linear flow control in the pipework.

    IC 30 with VFC

    Linear flow control VFC and actuator IC 30 are supplied separately.

    6.1.1 Installation position

    VFC with IC 30: as required.

    VFC with IC 20 (IFC../20) or VFC with IC 40 (IFC../40): vertical or horizontal, never upside down.

    7 Accessories

    7.1 Pressure switch for gas DG..C

    Monitoring the inlet pressure pu: the electrical plug of the pressure switch for gas points towards the inlet flange.
    Monitoring the outlet pressure pd: the electrical plug of the pressure switch for gas points towards the outlet flange.

    Scope of delivery:
    1 x pressure switch for gas,
    2 x retaining screws,
    2 x sealing rings.

    Also available with gold-plated contacts for voltages of 5 to 250 V.

    DG..VC

    TypeAdjusting range [mbar]Order No.
    DG 17VC2 to 1775455241
    DG 40VC5 to 4075455243
    DG 45VC10 to 4575455244
    DG 110VC30 to 11075455245
    DG 300VC100 to 30075455246
    With gold-plated contacts for voltages of 5 to 250 V
    DG 17VC..G2 to 1775455247
    DG 40VC..G5 to 4075455249
    DG 45VC..G10 to 4575455250
    DG 110VC..G30 to 11075455251
    DG 300VC..G100 to 30075455252

    DG..VCT

    With AWG 18 connection conductors

    TypeAdjusting range ["WC]Order No.
    DG 17VCT0,8 to 6,875454583
    DG 40VCT2 to 1674214174
    DG 110VCT12 to 4475454585
    DG 300VCT40 to 12075454586
    With gold-plated contacts for voltages of 5 to 250 V
    DG 17VCT..G0,8 to 6,875454587
    DG 40VCT..G2 to 1675454588
    DG 110VCT..G12 to 4475454589
    DG 300VCT..G40 to 12075454590

    7.2 Pressure test nipples

    Test nipples to check the inlet pressure pu and outlet pressure pd.

    Scope of delivery: 1 x test nipple with 1 x profiled sealing ring,
    Order No. 74923390

    7.3 Fastening set IC 20, IC 40

    To attach an IC 20 or IC 40 to a buttefly valve BV or a linear flow control VFC. The fastening set is delivered enclosed as an additional item.

    IC–BVG/BVA/BVH/VFC /B, Order No. 74921082

    7.4 Adapter set IC 30

    To attach the IC 30 to the linear flow control VFC.
    The adapter set is delivered enclosed as an additional item.

    IC 30/VFC /B, Order No. 74340194

    7.5 Seal set for sizes 1 and 3

    When retrofitting accessories or a second valVario control or when servicing, we recommend replacing the seals.

    Size 1, Order No. 74921988.
    Size 3, Order No. 74921990.

    Scope of delivery:
    A 1 x double block seal,
    B 1 x retaining frame,
    C 2 x O-rings (flange),
    D 2 x O-rings (pressure switch),

    for test nipple/screw plug:
    E 2 x sealing rings (flat sealing),
    2 x profiled sealing rings.

    The double block seal and retaining frame are not required for the VFC.

    8 Technical data

    8.1 Ambient conditions

    Icing, condensation and dew in and on the unit are not permitted.

    Avoid direct sunlight or radiation from red-hot surfaces on the unit. Note the maximum medium and ambient temperatures!

    Avoid corrosive influences, e.g. salty ambient air or SO2.

    The unit may only be stored/installed in enclosed rooms/buildings.

    The unit is suitable for a maximum installation height of 2000 m AMSL.

    Ambient temperature: -20 to +60°C (-4 to +140°F), no condensation permitted.
    Long-term use in the upper ambient temperature range accelerates the ageing of the elastomer materials and reduces the service life (please contact manufacturer).

    Storage temperature = transport temperature: -20 to +40°C (-4 to +104°F).

    This unit is not suitable for cleaning with a high-pressure cleaner and/or cleaning products.

    8.2 Mechanical data

    Gas type: natural gas, LPG (gaseous), biogas (max. 0.1 %-by-vol. H2S) or clean air; other types of gas on request. The gas must be dry in all temperature conditions and must not contain condensate.

    Medium temperature = ambient temperature.

    Max. inlet pressure pu max.: 500 mbar (7.25 psi).

    Control ratio: 25:1.

    Leakage rate: < 2% of kVS value

    Running times:
    IC 20: 7.5 s, 15 s, 30 s, 60 s
    IC 30: 30 s, 60 s
    IC 40: 4.5 s–76.5 s

    Connection flanges: Rp internal thread pursuant to ISO 7-1.

    Housing material: aluminium,
    control cylinder: aluminium,
    flow restricting cylinder: POM/aluminium,
    seal: HNBR/NBR.

    8.3 IC 20

    Angle of rotation: 0–90°, adjustable.

    Holding torque = torque.

    Duty cycle: 100%.

    Contact rating of the cam switches:

    VoltageMin. current (resistive load)Max. current (resistive load)
    24–230 V, 50/60 Hz1 mA2 A
    24 V DC1 mA100 mA

    Line entrance for electrical connection:
    3 × M20 plastic cable glands.

    Screw terminals using the elevator principles for cables up to 4 mm2 (single core cables) and for cables up to 2.5 mm2 with wire end ferrules.

    Typical designed lifetime:

    Switching currentSwitching cycles
    cos φ = 1cos φ = 0.3
    1 mA1,000,000–
    22 mA–1,000,000
    100 mA1,000,000–
    2 A100,000–

    1) Typical contactor application (230 V, 50/60 Hz, 22 mA, cos φ = 0.3)

    Three-point step signal to terminals 1 and 2: minimum pulse duration: 100 ms,
    minimum pause between 2 pulses: 100 ms.

    Enclosure:
    IP 54, in conjunction with BVH: IP 65,
    Nema 2, in conjunction with BVG, BVA or
    BVH: Nema 3.

    Safety class: I.

    Ambient temperature: -20 to +60°C, no condensation permitted.
    Storage temperature: -20 to +40°C.

    Mains voltage:
    120 V AC, -15/+10%, 50/60 Hz,
    230 V AC, -15/+10%, 50/60 Hz.

    TypeRunning time [s/90°]Torque [Nm]
    50 Hz60 Hz50 Hz60 Hz
    IC 20-077.56.252.52
    IC 20-151512.533
    IC 20-30302533
    IC 20-60605033

    Power consumption: 4.9 VA at 50 Hz, 5.8 VA at 60 Hz.

    Resistance of the feedback potentiometer: 1 kΩ, max. 0,5 W.

    IC 20..E

    Power consumption:
    terminals 1, 2 and 5:
    4.9 VA at 50 Hz, 5.8 VA at 60 Hz,
    terminal 3:
    8.4 VA at 50 Hz, 9.5 VA at 60 Hz,
    in total not exceeding:
    8.4 VA at 50 Hz, 9.5 VA at 60 Hz.

    Position feedback output:
    4–20 mA, electrically isolated, max. 500 Ω load impedance.
    The output is always active when supply voltage is applied to terminals 3 and 4.

    Input: electrically isolated,
    0 (4)–20 mA: load impedance switchable between 50 Ω and 250 Ω,
    0–10 V: 100 kΩ input resistance.

    8.4 IC 30

    Angle of rotation: 0–90°, adjustable.

    Holding torque = torque.

    Mains voltage: 24 V DC, ±20%.

    Line entrance for electrical connection:
    3 x M16 plastic cable glands (enclosed).

    Screw terminals using the elevator principles for cables up to 2.5 mm2 with wire end ferrules.

    The running time changes depending on the load. It refers to the torque, see type label.

    Contact rating of the cam switches:

    Voltage Min. current (resistive load) Max. current (resistive load)
    24–230 V, 50/60 Hz 1 mA 2 A
    24 V DC 1 mA 100 mA

    Minimum pulse duration: 100 ms.

    Minimum pause between 2 pulses: 100 ms.

    Enclosure: IP 65.

    Duty cycle: 100%.

    Power consumption: 4 W,
    when switching on: briefly 8 W.

    Ambient temperature:
    -15 to +60°C, no condensation permitted.
    Storage temperature: -15 to +40°C.

    Resistance of the feedback potentiometer:
    1 kΩ, < 50 V,
    recommended wiper current: 0.2 μA.

    8.5 IC 40

    Purpose of control: operating control, electric actuator.

    Mains voltage:
    100–230 V AC, ±10%, 50/60 Hz; the actuator automatically adjusts to the respective mains voltage.

    Power consumption: 10.5 W/21 VA at 230 V AC,
    9 W/16.5 VA at 120 V AC.

    Switch-on peak current: max. 10 A for max. 5 ms.

    Screw terminals using the elevator principles for cables up to 4 mm2 (single core cables) and for cables up to 2.5 mm2 with wire end ferrules.

    Angle of rotation: 0–90°, setting accuracy < 0.05°.

    Holding torque = torque as long as mains voltage is applied.

    Independently mounted control.

    Pollution degree: 3 (outside of enclosure)/
    2 (within enclosure).

    Rated impulse voltage: 4000 V.

    Impedance protected motor.

    2 digital inputs:
    24 V DC or 100–230 V AC each.
    Current requirement of digital inputs:
    24 V DC: approx. 5 mA eff,
    230 V AC: approx. 3 mA eff.

    1 analogue input (optional):
    4–20 mA (load impedance switchable from 50 Ω to 250 Ω).

    Potentiometer (optional): 1 kΩ ± 20%.

    Linearity tolerance: ± 2%, max. capacity: 0.25 W, conductive plastic element.

    Tap wiper at high resistance.

    2 digital outputs:
    Signalling contacts designed as relay change-over contacts. Contact current of digital outputs: min. 5 mA (resistive) and max. 2 A (resistive).

    Enclosure:
    IP 64, in conjunction with BVH: IP 65,
    Nema 2, in conjunction with BVG, BVA or
    BVH: Nema 3.

    Safety class: I.

    Duty cycle: 100%.

    Type of action to EN 60730: type 1C.

    Software class A.

    Overvoltage category III.

    Electrical connection: line entrance: 3 x M20 plastic cable glands.

    Ambient temperature:
    -20 to +60°C, no condensation permitted.
    Storage temperature: -20 to +40°C.

    Max. installation altitude: 2000 m AMSL.

    Running times and torques

    Type Running time [s/90°] Torque [Nm]
    50 Hz 60 Hz 50 Hz 60 Hz
    IC 40 4.5–76.5 4.5–76.5 2.5 2.5
    IC 40S 4.5–76.5 4.5–76.5 3 3

    On the IC 40, the running time and torque are independent of the mains frequency. The running time can be freely programmed between the limits of 4.5 and 76.5 s.

    The following specifications on the designed lifetime of the actuator relate to typical applications with BVA, BVAF, BVG, BVGF, BVH, BVHS and VFC.

    Mechanical switching cycles
    (0°–90°–0°/0%–100%–0%):

    IC 40 with VFC: 5 million cycles
    IC 40 with BVA/BVG: 5 million cycles
    IC 40 with BVAF/BVGF: 5 million cycles
    IC 40 with BVH/BVHx: 3 million cycles

    Typical number of operating cycles of the digital outputs RO 1 and RO 2:

    Switching current Switching cycles
    5 mA 4,000,000
    2 A 250,000

    8.6 Dimensions of IFC [mm]

    Type Connection L F G H1 H2 H3 H4 Weight
    Rp DN mm mm mm mm mm mm mm kg
    IFC 110 3/8 10 75 15 67.3 155 37.5 58 95.5 2.65
    IFC 115 1/2 15 75 15 67.3 155 37.5 58 95.5 2.60
    IFC 120 3/4 20 91 23 67.3 155 37.5 58 95.5 2.75
    IFC 125 1 25 91 23 67.3 155 37.5 58 95.5 2.65
    IFC 340 1½ 40 154.5 36 113.3 181 59 84 143 4.92
    IFC 350 2 50 154.5 36 113.3 181 59 84 143 4.75
    IFC 365 2½ 65 154.5 36 113.3 181 59 84 143 4.45
    IFC 350..F – 50 230.5 74 113.3 181 59 84 143 6.81

    8.7 Dimensions of VFC with IC 30 [mm]

    Type Connection L F G H1 H2 H3 Weight
    Rp DN mm mm mm mm mm mm kg
    VFC 110 + IC 30 3/8 10 75 15 67.3 204 37.5 71 2.60
    VFC 115 + IC 30 1/2 15 75 15 67.3 204 37.5 71 2.55
    VFC 120 + IC 30 3/4 20 91 23 67.3 204 37.5 71 2.70
    VFC 125 + IC 30 1 25 91 23 67.3 204 37.5 71 2.60
    VFC 340 + IC 30 1½ 40 154.5 36 113.3 230 59 97 4.85
    VFC 350 + IC 30 2 50 154.5 36 113.3 230 59 97 4.70
    VFC 365 + IC 30 2½ 65 154.5 36 113.3 230 59 97 4.40
    VFC 350..F + IC 30 - 50 230.5 74 113.3 230 59 97 6.75

    8.8 Dimensions of IFC [inch]

    Type Connection L F G H1 H2 H3 H4 Weight
    NPT DN inch inch inch inch inch inch inch lbs
    IFC 1T10 3/8 10 2.95 0.59 2.65 6.1 1.48 2.28 3.76 5.83
    IFC 1T15 1/2 15 2.95 0.59 2.65 6.1 1.48 2.28 3.76 5.72
    IFC 1T20 3/4 20 3.58 0.91 2.65 6.1 1.48 2.28 3.76 6.05
    IFC 1T25 1 25 3.58 0.91 2.65 6.1 1.48 2.28 3.76 5.83
    IFC 3T40 1½ 40 6.08 1.42 4.46 7.13 2.32 3.31 5.63 10.8
    IFC 3T50 2 50 6.08 1.42 4.46 7.13 2.32 3.31 5.63 10.5
    IFC 3T65 2½ 65 6.08 1.42 4.46 7.13 2.32 3.31 5.63 9.79

    8.9 Dimensions of VFC with IC 30 [inch]

    Type Connection L F G H1 H2 H3 Weight
    NPT DN inch inch inch inch inch inch lbs
    VFC 1T10 + IC 30 3/8 10 2.95 0.59 2.65 8.03 1.48 2.8 5.73
    VFC 1T15 + IC 30 1/2 15 2.95 0.59 2.65 8.03 1.48 2.8 5.62
    VFC 1T20 + IC 30 3/4 20 3.58 0.91 2.65 8.03 1.48 2.8 5.95
    VFC 1T25 + IC 30 1 25 3.58 0.91 2.65 8.03 1.48 2.8 5.73
    VFC 3T40 + IC 30 1½ 40 6.08 1.42 4.46 9.06 2.32 3.82 10.70
    VFC 3T50 + IC 30 2 50 6.08 1.42 4.46 9.06 2.32 3.82 10.4
    VFC 3T65 + IC 30 2½ 65 6.08 1.42 4.46 9.06 2.32 3.82 9.7

    9 Maintenance cycles

    At least once a year, at least twice a year in the case of biologically produced methane.