Flow Measurement Screw type flow meters

Screw type flow meters SVC Construction Function General product characteristics Approvals Sensor versions General characteristics Accuracy characteristics Technical data Type key Electrical connections Signal characteristics Electrical characteristics Explosion-proof design variant (ATEX/IECEx) Pressure drop charts SVC technical drawings overview SVC technical drawings (dimensions/weights)

Screw type flow meters SVC 1 Housing 2 Measuring system (screw spindles) 3 Bearing (ball bearings) 4 Sensing wheel 5 Sensors 6 Plug 7 Measuring connection (pressure, temperature, etc.) I Function Two high-precision screw spindles (2) with rolling-element bearings (3) for low friction. The liquid flow makes the spindles rotate (displacement principle) and runs through the device in axial direction. Flow in and out takes place without hardly any deflection, which means the device only loses comparatively little pressure. The measuring principle does not cause any pressure or volume flow pulsation....

Screw type flow meters SVC Description I Standard version The standard versions come with an integrated pre-amplifier which converts the pulses from the magnetic sensors into square-wave signals which are then computed by an electronics into specific measurement values. The optionally available remote-electronics version is designed to handle extreme temperature ranges. I Encoder version with maximised measurement resolution Compared with standard sensors, encoders are capable of generating considerably more pulses, thus increasing measurement resolution by orders of magnitude. Encoder-equipped...

Screw type flow meters SVC Technical data I General characteristics Nominal sizes Pipe connection (R), SAE flange (S), DIN flange (D) Mounting position Flow direction Preferred direction of flow (only for encoder versions) Large bearing > small bearing Typical measurement accuracy +/- 0.2% from 20 mm2/s viscosity values Maximum pressure (standard versions) Maximal pressure (high-pressure versions) maximum permissible pressure loss temporary permanent SVC 100 (ATEX version) Ambient temperature Media temperature Sound pressure level The indicated measurement accuracy refers to the pulse volume,...

Screw type flow meters SVC Technical data I Materials Housing and flanges Measuring spindles Heat-treated steel Ball bearing Heat-treated steel I Sealing elements and electronics temperature tolerance Versions with integrated electronics Versions with appliance socket (Hirschmann) Tamb = -40* … 80°C Electronics versions Versions with remote electronics Tamb = -40* … 150°C -40 … 80°C ATEX version without preamplifier Hightemperature PLUS ATEX version high temperature PLUS Sealing material = -15 °C * For ATEX/IECEx: Tamb min FKM Tamb min EPDM = -30 °C Tamb min FEP = -30 °C** Tamb min FKM low temp....

Screw type flow meters SVC Technical data I Operating characteristics Nominal size Pulse volume Pulse frequency with Qmax Measuring unit starting at Horizontal mounting position Measuring range Vertical mounting position I High-pressure version characteristics Nominal size Pulse volume Pulse frequency with Qmax Measuring unit starting at Horizontal mounting position Measuring range Vertical mounting position * Resolution with both measuring channels and 4-fold evaluation I Encoder version characteristics Nominal size Sensor resolution* Pulse volume Measured value resolution 4-fold** Pulse frequency...

Screw type flow meters SVC 1 Product 2 Nominal size 4 T FKM cupsuled ball bearing (only nominal sizes 4 and 10) 1 Standard version Housing spheroidal cast iron GJS-400 / spindles steel 3 High-pressure version Housing spheroidal cast iron GJS-600 / spindles steel Note (only nominal size 10) (only nominal sizes 4 and 10) 9 Electronic version (pre-amplifier) S Standard H High temperature K High temperature PLUS X ATEX/IECEx (isolating switching amplifier to be ordered separately) KX ATEX/IECEx High Temperature PLUS L IO-Link V without pre-amplifier E Encoder (only nominal size 10) 10 Cable length...

Screw type flow meters SVC Electronics I Electrical connections Standard and high-temperature versions High-temperature PLUS and low-temperature version Connection plug arrangement (M12x1 4-pole round connector) 3: Channel 2 (yellow) 4: 0 Volt (white) Encoder version 3: 0 Volt (blue) 4: Channel 2 (black) Cannon version Connection plug arrangement (M12x1 metal/4-pole round connector) Connection plug arrangement A: UB (brown) B: Channel 1 (green) C: Channel 2 (yellow) D: 0 Volt (white) IO-Link version Connection plug arrangement (M12x1 metal/4-pole round connector) IO-Link mode 1: brown 2 I Signal...

Screw type flow meters SVC Electronics I Standard versions electrical characteristics Number of measuring channels 24 V +/- 20% or 12 V +/- 20% for versions with reduced supply voltage Pulse with symmetric output signal Square duty factor/channel 1:1 ± 15% Signal output Pulse offset between the two channels Output power / channel Pa max Protection rating I Encoder versions electrical characteristics Number of measuring channels Pulse shape with symmetric output signal Square Duty factor/channel 1:1 ± 15% Signal output Pulse offset between both channels Maximum load Power consumption Protection...

Screw type flow meters SVC Electronics I IO-Link Thanks to its international standardisation (IEC 611319), the IO-Link technology offers a point-to-point connectivity with continuous monitoring between any desired control layer and the SVC-IO-Link assembly. Handling and startup is made easy by the associated IODD file (IO Device Description) strongly simplified IO-Link connection plug The SVC-IO-Link assembly directly delivers all measured values with units. In the preset SIO mode (standard input output), the volume counter gives squarewave signals if the IO-Link mode is not enabled by an IO-Link...

Screw type flow meters SVC Explosion-proof version (ATEX/IECEx) I Function • All screw type flow meters are available as explosion-proof versions according to ATEX and IECEx certification. The explosion-proof version consists of the flow meter (intrinsically safe electric gear) and the switching amplifier K 130 (accessory electric gear). This layout meets the ignition protection type "intrinsic safety". The flow meter is installed in the explosive atmosphere. The switching amplifier K 130 is assembled in the safe atmosphere. The flow meter is electrically connected with the switching amplifier....