Series_AD-VH_Flow_Switch_and_Indicator
8Pages

Flow switches Series AD/VH Flow switch and indicator for liquids and gases       Suitable for clear, opaque or turbid liquids (series AD & VH), and for gases (series AD) Flow switching by means of magnetic coupling, watertight, no contact between process fluid and switching, indicator or transmitter systems Suitable for installation in horizontal or vertical pipes Robust construction Scales available for H2O, air, oil, etc. (series AD) Flow rate (for liquids): - Series AD: 0.25 ... 270 l/min - Series VH: 2 ... 120 m3/h Accuracy for series AD: ±5% f.s. Connections: - Series AD: ¼” ... 2 ½” BSP / NPT - Series VH: G1 / 1” NPT, to be inserted on a DN32 ... DN500 pipe Materials: - Series AD: EN 1.4404 (AISI 316L), aluminium, brass - Series VH: EN 1.4404 (AISI 316L), PTFE Flow switching: - 1 reed switch (series AD & VH) - 2 reed switches (only series AD) - 1 or 2 inductive switches (only series AD) All switches for series AD are ATEX Ex ia IIC T4...T6 Ga / Ex ia IIIC T85ºC Da certified Options for model ADI15: - Local flow indication - Electronic transmitter with 4-20 mA output for safe or hazardous area (Ex ia IIC T4...T6 Ga / Ex ia IIIC T85ºC Da protection,

Series AD Working principle Technical data A spring M keeps a disk B in zero flow rate position. When the fluid flows through the disk at a specific speed, a force is made on the disk B, moving it to an equilibrium position.  Scale range: according to flow rate chart on page 4 The distance covered by B depends on: - The force of the fluid flow F. - The relationship between areas A & B. - The force in opposition of the spring C.  Accuracy: ±5% full scale  Scales in l/h, l/min, l/s, m 3/h, %, etc.  Connections: ¼” ... 2 ½” BSP / NPT - Brass from ¼” to 2” - Aluminium from 1 ¼” to 2 ½”...

Flow switches Series AD/VH Materials Brass / AISI 316L / Anodized aluminium * AISI 302 Polycarbonate - Coated aluminium AISI 316 NBR *** * Materials available for each size: ¼” ... 1” : brass, AISI 316L, anodized aluminium AISI 316L, anodized aluminium ** magnet with plastic coating for applications with corrosive liquids on

Flow scales l/min water * Equivalent flow ranges for air at 1 bar abs 20ºC in Nl/min: l/min H2O x 8 (approx.) Vertical upwards Models ADI15+TH6 Vertical downwards Models R” (BSP / NPT) Horizontal / Left to right Horizontal / Right to left All dim

Flow switches Series AD/VH Model AD15  Flow switch with min-max flow rate reed switches.  Local flow indicator, with optional min-max flow rate reed  Vertical or horizontal mounting, as per customer´s request.  Adjustable reed switch for the full flow scale, mounted in a polyamide housing, IP65 ingress protection.  Flow scale in l/h, l/min, l/s, m3/h, %, etc. switches, adjustable for the full flow scale and mounted in an IP65 polyamide housing; and/or adjustable inductive switches, mounted in the indicator housing.  Vertical or horizontal mounting, as per customer´s request. ...

Series VH Working principle A liquid flows inside a pipe fast enough to move a paddle, which at the same time moves a permanent magnet that acts over the reed switch. The magnet-reed switch system is isolated from the liquid. The flow switching point is positioned between 30º and 45º from the zero position. Applications  Hydraulic and heating-cooling circuits  Chemical, petrochemical and pulp & paper industry  Water treatment, power plants  Swimming pools & fire protection systems horizontal pipe vertical pipe with upwards flow, with spring vertical pipe with upwards flow, with...

Flow switches Series AD/VH Dimensions Switching flow rates DN Switching flow rate Approximate flow rates Mounting Horizontal / left-right or right-left: model VH35 Vertical upwards: model VH37 / 39 BD

R-CT-ADVH Rev. 2 english version PRESENCE IN MORE THAN 50 COUNTRIES ALL OVER THE WORLD Tecfluid S.A. Narcís Monturiol 33 08960 Sant Just Desvern Barcelona Tel: +34 93 372 45 11 Fax: +34 93 473 44 49 tecfluid@tecfluid.com www.tecfluid.com Quality Management System ISO 9001 certified by Pressure Equipment Directive 97/23/CE certified by ATEX European Directive 94/9/CE certified by HART® is a registered trademark of HART Communication Foundation The technical data described in this specification sheet is subject to modification without notification if the technical innovations in the...