Georg Fischer PVC - Apsupplies

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- System Specification for PVC-U Imperial (Inch)-sized Piping Systems1. ScopeThis specification covers requirements for the Georg Fischer PVC-U Piping Systemintended for a wide range of applications including water, wastewater and effluenttreatment as well as a wide range of chemical applications. The components of thePVC-U Imperial (Inch)-sized piping systems are in accordance with the followingstandards.2. Basic System Data2.1 Material Specification for Unplasticised Polyvinylchloride (PVC-U)PVC-U pipes, fittings and valves from Georg Fischer Piping Systems shall bemanufactured from unplasticised polyvinylchloride, of which pipes and fittings aredesigned for 25 years of operation with water as medium (20 C). PVC-U has also anoptimal chemical resistance against many mineral acids, bases & salt solutions. Fordetailed information, please refer to the list of chemical resistance provided by GeorgFischer Piping Systems. The raw material used shall be material designed for usewith pressure bearing piping systems with long term hydrostatic properties inaccordance with EN 1452, as supplied by Georg Fischer Piping Systems.2.1 Characteristics of PVC-U MaterialCharacteristicValueDensityTensile E-modulesCharpy notched impact strength at 23 CCharpy notched impact strength at 0 CVicat heat distortion temp. B/50N1.38 g/cm3 2400 N/mm26 kJ/m23 kJ/m2 76 CChemical resistanceThermal expansion coefficientTemperature range in CColourDIBT agreement0.07 - 0.08 mm/mK0 C - 60 Cdark grey; 7011 -RALTest StandardsISO 1183-1EN ISO 527-1EN ISO 179/1eAEN ISO 179/1eAISO 306based on themedium list 40.1.4DIN 537528"6"5"4"3"2"1 1/2"1 1/4"1"3/4"1/2"dbar15 - class E12 - class DPipe12 - class T9 - class C15 - class EFittings9 - class Cball valve*16butterfly valve*910diaphragm valve*16Flange*10gaskets*15pipe clips-Products3/8"2.2 PVC-U Dimensional Range & Pressure** (at 20 C)* diaphragm valve Imperial (Inch) size 6” only available in PN7** values in table at the max. pressure in units of bar, at 20 CSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 1/ 14

- System Specification For more detailed physical properties and product Pressure – Temperature curvesplease consult the Georg Fischer Piping Systems planning fundamentals on theGeorg Fischer Piping Systems website.2.3 ApprovalsThis material specification for PVC-U is met by Georg Fischer Piping Systems.Therefore Georg Fischer Piping Systems is approved according to BS standards. Formore information please consult our approvals database on the Georg Fischer PipingSystems website.3. PipesPipes are made of PVC-U processed according to the quality specifications anddimensions according EN ISO 1452. Pipe formulation has been designed for anenhanced chemical resistance (content of CaCO3 3%, enhanced thermostabilizerpackage; etc.).Processed pipes are straight and show a very low out of roundness. The wallstructure is homogeneous and even.OD-tolerances surpass the requirements of ISO 161-2 and are compatible with thefitting programme of Georg Fischer Piping System for easy pre-assembly andminimized gaps.For highly demanding applications in the chemical industry the application ofpressure rating SDR 9 pipes and PN 15 fittings is strongly recommended for OD 4″.Any installation should follow the Georg Fischer Piping Systems installationguidelines for industrial piping and the guidelines issued by the DVS.Approved pipes comply with the corresponding quality specifications of DIN CertcoZP 1.1.1.4. FittingsAll PVC-U fittings shall be Imperial (inch)-sized manufactured by Georg FischerPiping Systems shall be of a type suitable for solvent cementing, with dimensionsand tolerances in accordance with EN 1452 and ISO 727-2. They need to be testedaccording to EN 10204. All threaded connections shall have pipe threads inaccordance with the requirements of ISO 7-1.4.1 Packaging and LabellingThe packaging must ensure that the fittings are not damaged during transportation.Packaging and Labeling must meet the following requirements: Identification of the content, in type, quantity and product detailsInformation about standards and approvals covered by the productSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 2/ 14

- System Specification Content of the label has to accomplish legal requirementsLabels must be EAN coded for automatic identificationComply to GF standards as well as to international standards such as ISPM155. Accessories5.2.1 FlangesBacking flanges in metric sizes DN 15-225 mm shall be designed according to ENISO 15493, in a thermo plastic-oriented design, consisting of 100% glass fibrereinforced polypropylene, PP-GF30, graphite black and UV stabilized. These flangesare manufactured in a seamless technology injection moulding process by GeorgFischer Piping Systems. The flange shall be optimised with a V-groove in the innerdiameter to ensure an evenly distributed force on the thermo plastic flange adapter.Connecting dimensions metric according to ISO 7005, EN 1092; Bolt circle diameterPN 10; Inch: ANSI B 16.5, BS 1560; class 150.Alternatively the backing flanges in metric sizes can be from or unplastisizedpolyvinyl chloride, PVC-U designed according to EN ISO 15493, in a thermo plasticoriented design. The backing flanges shall be marked with dimension, PN-value,standards, brand and lot number. Connecting dimensions metric according to ISO7005, EN 1092; Bolt circle diameter PN 10; Inch: ANSI B 16.5, BS 1560; class 150.5.2.2 gasketsGaskets in Imperial (Inch)-sizes 3/8” – 8” shall consist of elastomeric materialaccording to EN681, designed with or without metal reinforcement for use withsolvent cementable flange adaptors according to EN ISO 15493. Gaskets withreinforcement shall be designed to be centred by the outer diameter. Gaskets withreinforcement shall provide fixation aids to fit on the flange bolts.5.2.3 Pipe Support SystemPipe Support System shall be KLIP-IT, sizes 3/8” – 8”, supplied by Georg FischerPiping Systems.6. ValvesAll PVC-U valves shall be metric sizes manufactured by Georg Fischer PipingSystems or equal in accordance with EN ISO 16135 and following, tested accordingto the same standard.6.1. Ball ValvesAll PVC-U ball valves with Imperial (inch)-sizes 3/8” – 4”, shall be Georg FischerPiping System Type 546 with true double union design manufactured by GeorgFischer Piping Systems in accordance with EN ISO 16135. Incorporated into itsdesign shall be a safety stem with a predetermined breaking point above the bottomO-ring, preventing any media leakingSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 3/ 14

- System Specification in the event of damage. The valve nut threads shall be buttress type to allow fast andsafe radial mounting and dismounting of the valve during installation or maintenancework. Seats shall be PTFE with backing rings creating self-adjusting seals andconstant operating torque. Backing rings and seals shall be EPDM or FPM. Thehandle shall include in its design an integrated tool for removal of the union bush.Union bush shall have left-hand threads to prevent possible unscrewing whenthreaded end connectors are removed from pipe.Following accessories shall be available: A Multi-Functional Model (MFM) in PPGF equipped with internal limit switchesfor reliable electrical position feedback, is mounted directly between the valvebody and the valve handle. This MFM is also the necessary interface for latermounting of actuators.Mounting plate in PPGF with integrated inserts for later screw mounting onany supportLockable multi-functional handle6.1.1. Electrically actuated ball valvesElectric actuators shall be Types EA11 (Imperial (inch)-sized 3/8” – 2”), EA21 (sizesinch)-sized 3/8” – 2”), EA31 (Imperial (inch)-sized 2 ½” – 4”) shall be availablemanufactured by Georg Fischer Piping Systems in accordance with EN 61010-1, ECdirectives 89/336/EWG-EMV and 73/23/EWG, LVD and needs to be CE marked.Actuator housing shall be made of PPGF (polypropylene glass fibre reinforced),flame retardant with external stainless steel screws. All electric actuators shall havean integrated emergency manual override and integrated optical position indication.All electric actuator types (with the exception of EA11) shall have the followingaccessories available: Fail-safe unitHeating elementCycle extension, cycle time monitoring, and cycle countingMotor current monitoringPosition signalisationPositioner Type PE25Limit switch kits Ag-Ni, Au, NPN, PNP, NAMURAS Interface Plug ModulElectric actuator specifications of the actuators shall be as follows:SpecificationEA11EA21EA31EA42Nominal torque (Nm)101060100Control time (s/90 )*551525Cycles at 20 C *150,000250,000100,00075,000Duty cycles ED at 20 C40%100%50%35%Protection classIP65 per EN 60529 - IP67 (for vertical cable mounting and wall feed through).100-230, 50-60 Hz or 24V /24V, 50/60 Hz versionsVoltage* at nominal torqueSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 4/ 14

- System Specification 6.1.2. Pneumatically actuated ball valvesPneumatic actuators shall be Georg Fischer Piping Systems Types PA11 (Imperial(Inch)-sized ½”- ¾”) and PA21 (Imperial (Inch)-sized 1”-2”). They be manufactured byGeorg Fischer Piping Systems. Pneumatic actuators shall be available as fail safeclose, fail safe open and double acting and have an integrated optical positionindication. Actuator housing shall be made of Polypropylene fibre glass reinforced(PPGF) and flame retardant. Actuators shall contain a preloaded spring assembly toensure safe actuator operation and maintenance. Actuators shall contain integratedNamur interface for the easy mounting of positioners, limit switches and accessories.The Valve shall be equipped with a Multi-functional-module for reliable electricfeedback, mounted directly between the valve body and the actuator asmanufactured by Georg Fischer Piping Systems. For valve Imperial (Inch)-size 2 ½” pneumatic actuators shall be Type PA 30(fail safe to close or open function), Type PA35 (double acting function).For valve Imperial (Inch)-sizes 3” pneumatic actuators shall be Type PA 35(fail safe to close or open function), Type PA40 (double acting function).For valve Imperial (Inch)-sizes 4” pneumatic actuators shall be Type PA 45(fail safe to close or open function), Type PA45 (double acting function)All actuators shall be manufactured by Georg Fischer Piping Systems. Pneumaticactuators shall have an integrated optical position indicatior. Actuator housing shallbe made of hardened anodized aluminium. Actuators shall contain integrated Namurinterface for the easy mounting of positioners, limit switches and accessories.All pneumatically actuated ball valves shall have the following accessoriesavailable: Pilot valve remote or direct mounted in voltages 24VDC/AC, 110VAC, 240VACPositioner Type DSR 201Limit switch kits Ag-Ni, Au, NPN, PNP, NAMURStroke limiterManual override for all sizes up to 4”AS Interface Control module with incorporated position feedback and asolenoid pilot valve6.2. Diaphragm ValvesAll PVC-U diaphragm valves, metric sized, shall be either: Type 314 (true double union design, 3/8”-2”), orType 315 (spigot design, 3/8”-2”) orType 317 (flanged design, 3/8”-6”)All diaphragm valves shall be manufactured by Georg Fischer Piping Systems inaccordance with EN ISO 16138. The upper body shall be PPGF (polypropylene glassfibre reinforced) connected to the lower body with exposed stainless steel bolts. Aposition indicator integrated into the hand wheel must be present to determinediaphragm position. Diaphragms are to be EPDM, FPM, NBR, or PTFE withSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 5/ 14

- System Specification EPDM or FPM supporting diaphragm. Following option shall be available: Handwheel with built-in locking mechanism6.2.1. Pneumatically actuated diaphragm valvesPneumatic diaphragm actuators shall be Georg Fischer Piping Systems TypeDIASTAR Imperial (inch)-sizes ½”- 6”. Pneumatic actuators shall be available as failsafe close, fail safe open and double acting and have an integrated optical positionindicatior.Actuator housing shall be made of PPGF (polypropylene glass fibre reinforced),flame retardant and NEMA 4X or IP 65 corrosion resistance. Actuators with FC modeshall contain a preloaded galvanised steel spring assembly to ensure safe actuatoroperation and maintenance. The pneumatically actuated diaphragm valves type 025and 028 shall have the following accessories available: Solenoid pilot valve remote and direct mounted in voltages 230V, 50-60 Hz;115V 50-60Hz; 24V 50-60 Hz; 24 VDCPositioner Type DSR 100/101Feedback with following limit switches Ag-Ni, Au, NPN, PNP, NAMURStroke limiter & emergency manual overrideASI controller6.3. Butterfly ValvesAll PVC-U butterfly valves, Imperial (Inch)-sizes 1 ½” – 8", shall be Georg FischerPiping Systems Type 567 / 563 wafer type with a double eccentric disc designmanufactured by Georg Fischer Piping Systems in accordance with EN ISO 16136.Seals shall be available in both EPDM and FPM. The lever handle shall be lockablein increments of 5 degrees. There shall always be six teeth engaged between theratchet and the index plate to ensure accurate and safe positioning of the lever.There shall be the option of fine adjustment by use of a specific hand lever, allowingthe disc to be exposed at any angle between 0 und 90 . As an option, the hand levershall be lockable. The hand lever shall be manufactured of high strength PPGF(polypropylene glass fibre reinforced). The option of an integrated electricposition indicator shall be available. The electric position indicator shall beintegrated into the mounting flange. Butterfly valves shall have low actuationtorque to enable easy operation. All Butterfly valves Type 567 manufactured byGeorg Fischer Piping Systems are designed for a nominal pressure rate of 10 bar. Allbutterfly valves Type 563 are designed for a nominal pressure rate of 4 bar.6.3.1. Electrically actuated butterfly valvesElectric actuators shall be Georg Fischer Piping Systems Types EA31 or EA 42dependent on valve size. They shall be manufactured by Georg Fischer PipingSystems in accordance with EN 61010-1, as per the above specifications. Actuatorhousing shall be made of PPGF (polypropylene glass fibre reinforced), flameretardant and external stainless steel screws. All electric actuators shall have anintegrated emergency manual override and integrated optical position indication. Allelectric actuator types shall have the following accessories available:System Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 6/ 14

- System Specification Fail-safe unitHeating elementCycle extension, monitoring, and countingMotor current monitoringPosition signalisationPositioner Type PE25Limit switch kits Ag-Ni, Au, NPN, PNP, NAMURManual overrideAS-Interface Plug Modul6.3.2. Pneumatically actuated butterfly valvesPneumatic actuators shall be Georg Fischer Piping Systems Types PA 35 (Imperial(Inch)-sizes 2” – 2 ½”), PA40 (Imperial (Inch)-sizes 3” only), PA45 (Imperial (Inch)sizes 4” – 5”), PA55 (Imperial (Inch)-sizes 2” – 2 ½”). They shall supplied by GeorgFischer Piping Systems. Pneumatic actuators shall be available as fail safe close, failsafe open and double acting and have an integrated optical position indication.Actuator housing shall be made of hardend anodized aluminium. Actuators shallcontain integrated Namur interfaces for the easy mounting of positioners, limitswitches and accessories. All pneumatically actuated butterfly valves shall have thefollowing accessories available: Solenoid pilot valve remote and direct mounted in voltages 230V, 50-60 Hz;115V 50-60Hz; 24V 50-60 Hz; 24 VDCPositioner Type DSR 100/101Feedback with following limit switches Ag-Ni, Au, NPN, PNP, NAMURStroke limiter & emergency manual overrideASI controller6.4 Angle Seat ValvesAll PVC-U Angle Seat Valves, Type 300 shall be manufactured by Georg FischerPiping Systems according to EN ISO 21787 and overall length according to EN 558,available in Imperial (Inch)-sizes 3/8” – 3” with an internal piston cone end in PE orPTFE, and with solvent cement spigots. The Angle Seat Valves manufactured byGeorg Fischer Piping Systems are designed for a nominal pressure rate of 9 bar.6.5. Check ValvesAll PVC-U Ball check valves, according to EN ISO 16137, Imperial (Inch)-sizes 3/8” 2“, shall be Type 360 true double union design. Seals shall be EPDM or FPM. Unionbushes shall have a left hand thread to prevent possible unscrewing when threadedend connectors are removed from pipe. This valve shall be suitable for mounting in avertical position.System Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 7/ 14

- System Specification 6.5.2. Angle Seat Check ValvesAll PVC-U Angle Seat Check Valves, Type 303 shall be manufactured by GeorgFischer Piping Systems according to EN ISO 16137 and overall length according toEN 558, available in Imperial (Inch)-sizes 3/8”-3” with EPDM or FPM seals and withsolvent cement spigots. The Angle Seat Check Valves shall be leakproof from awater column of 2 m for EPDM and 3 m for FPM seals as supplied by Georg FischerPiping Systems. The Angle Seat Check Valves manufactured by Georg FischerPiping Systems are designed for a nominal pressure rate of 9 bar.6.5.3. Wafer Check ValvesAll PVC-U Wafer Check Valves shall be Georg Fischer Piping Systems Type 369,Imperial (Inch)-sizes 1 ¼”-12”. The minimum water column of 2 m is required forsealing. They have to be equipped with a spring (either in 316 stainless steel orHasteloy C) guaranteeing closing in all installation positions. Attention: A stabilizingpipe zone of at least 5 times nominal diameter (DN) (recommended 10 times nominaldiameter) before and after the wafer check valve should be provided.6.6. Pressure regulating valvesAll PVC-U pressure regulating valves as supplied by Georg Fischer Piping Systemsshall have the followingcharacteristics:Pressure ranges for all pressure regulating valves are the following: Imperial (Inch)-sizes 3/8” – 2”Imperial (Inch)-sizes 2 ½” – 3”Imperial (Inch)-sizes 4”from 0 up to max. 10 barfrom 0 up to max. 6 barfrom 0 up to max. 4 bar6.6.1. The Pressure Reducing Valveas supplied by Georg Fischer Piping Systems reduces the pressure within the systemto a pre-set value. By using the differential pressure, the pressure reducing valveadjusts itself to the set working pressure. The outlet pressure (working pressure) isnot directly related to the inlet pressure. If the outlet pressure increases above the setvalue, the diaphragm is lifted against the spring force. If the outlet pressure fallsbelow the set value, the diaphragm is pressed down by the spring force. Thepressure reducing valve begins to close/open until a state of equilibrium is reestablished; in other words, the outlet pressure remains constant irrespective of anincreasing or decreasing inlet pressure. Following types and sizes are available: Type V82, compact Pressure Reducing Valve with an integrated manometer,Imperial (Inch)-sizes 3/8” – 4”Type V182, compact Pressure Reducing Valve offering easy adjustment andreal time visual control of the actual pressure reduction on the integratedmanometer, Imperial (Inch)-sizes 3/8”- 1 ½”Type V782, compact Pressure Reducing Valve, offering an easy adjustment,excellent flow rate and very low hysteresis, Imperial (Inch)-sizes 3/8” – 1 ½”System Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 8/ 14

- System Specification 6.6.2. Pressure Relief Valveas supplied by Georg Fischer Piping Systems serves to keep the working or systempressures constant, to balance out pressure pulsation, and to reduce pressure peaksin process systems. The third pipe spigot fitted on the valve body means the valvecan be installed directly in the main pipeline. If the inlet pressure rises above the setvalue, the pressurized valve piston is lifted against the spring force. Consequently,the valve opens and there is a reduction of pressure in the outlet pipe. The excesspressure can exhaust or be redirected via the third outlet. The valve closes as soonas the inlet pressure sinks below the pre-set spring tension. Following types andsizes are available: Type V185, Pressure Relief Valve, Imperial (Inch)-sizes 3/8” – 2”Type V85, Pressure Relief Valve, Imperial (Inch)-sizes 2 ½” – 4”6.6.3. The Pressure Retaining Valveas supplied by Georg Fischer Piping Systems serves to keep the working or systemrelated pressures constant, to balance out pressure pulsation, and to reducepressure peaks in chemical process systems. If the inlet pressure rises above the setvalue, the pressurized valve piston is lifted against the spring force. Consequently,the valve opens and there is a reduction of pressure through the outlet pipe. Thevalve closes as soon as the inlet pressure sinks below the pre-set spring tension.Following types and sizes are available: Type V186, Pressure Retaining Valve, Imperial (Inch)-sizes 3/8” – 2”Type V86, Pressure Retaining Valve, Imperial (Inch)-sizes 2 ½” – 4”Type V786, Pressure Retaining Valve, Imperial (Inch)-sizes 3/8” – 1 ½”7. Solvent cement & CleanerFor adhesive jointings, PVC-U cement with gap-filling adhesives must be used forsolvent cementing. Georg Fischer recommends the Henkel cement system TANGITPVC-U for all PVC-U solvent cement joints. All specifications are based on usingTANGIT PVC-U, including strength and chemical resistance. For all other cementsplease refer to the manufacturers’ instructions.PVC-U TANGIT contains app. 20% PVC-U, dissolved in a blend of solvents. Thesolvents soften and macerate the edges of the surfaces they are applied to. Once thesolvents have evaporated, they leave a homogenous joint with the same mechanical,thermic and chemical properties as of the PVC-U pipe system.The jointing surfaces of pipe and fitting must be clean and free of grease, otherwisethey must be cleaned with TANGIT cleaner.For chemical concentrations 70% sulphuric acid; 10% chromic acid, 25%hydrochloric acid; 20% nitric acid; sodium hypochlorite 6% active chlorine, 5%hydrogen peroxide and hydrofluoric acid in any concentration, subject to theapplication and operating conditions, Dytex solvent cement and Dytex Cleaning forSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 9/ 14

- System Specification PVC-U, manufactured by Henkel, must be used in accordance with the instruction ofHenkel.8. InstrumentationThe following parameters can be measured (Sensors), indicated and/ or transmitted(transmitters) to PLC, PC and other Data Acquisition Systems. All products complywith the CE standard.ParameterFlowTochnologyCompatible liquids (*)Paddlewheelclean liquidsRotameterclean liquidsMagmetercontaminated liquidsLevelHydrostaticall liquidspH-ORPGlas electrodesall liquidsConductivityContactall liquidsPressurePiezoresistiveall liquidsTemperaturePt1000all liquids(*) please check first the sensors limitations (data sheet) and chemical resistance list8.1 SensorsThe sensors listed hereafter will transfer the measured value to a Georg FischerPiping Systems Transmitter, allowing simple calibration and maintenance of thedevices. Alternatively the measured values of the sensors can be sent directly to aPLC, PC or other local made electronics using either an analogue signal (mA, opencollector or sinusoidal voltage) or a digital signal called S3L (Georg Fischer PipingSystems Signet serial signal).8.1.1 Installation FittingDepending on the sensor type, special installation fittings shall be used forconnection to the pipeline: Installation T-Fitting sizes d20-63 mm with double trueunion in PVC-U, clamp on saddles sizes d75 – 315 mm and weld-o-let sizes d75 –400 mm with as supplied by Georg Fischer Piping Systems. Connection can beWeld-o-let, direct union ½", ¾ " ISO, ¾" NPT, Submersion kits. These fittings will besocket solvent cemented version.8.1.2 Flow sensors8.1.2.1 Paddlewheel sensors515 and 525 sensors:All sensors of this family are “sinusoidal” sensors. This sensor from Georg FischerPiping Systems SIGNET requires no external power source to produce a signal.Internal to the body of the sensor is a wire coil which when excited by the rotorassembly produces a small sinusoidal signal. The rotor assembly consists of fourpaddles; inserted into each of the paddles of the rotor are magnets. As liquid flowsSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 10/ 14

- System Specification past the rotor assembly it rotates each of the four paddles produces a sine wavesignal as it passes the centre of the body (two paddles of the rotor produces a fullAC sine wave). The sensors as manufactured by Georg Fischer Piping SystemsSIGNET produce a signal output which is proportional to the flow rate. A K-factor(number of pulses generated by the sensor per 1 liter or 1 gallon of fluid the sensor)is used to define the size of the pipe that the sensor is inserted into.3-2536 and 3-2537 sensors:All sensors of this family of sensors are Hall Effect” sensors. Internal to the GeorgFischer Piping Systems SIGNET sensors body is an open collector relay. The sensoris supplied with a voltage from the 3-8550 transmitters or an external power supplyranging from 5 to 24 volts. This voltage is switched through the open collector relayas the paddlewheel (rotor) of the sensor rotates. The sensor’s rotor assembly hasfour paddles. Inserted in to each of the paddles is a magnet. As the paddles pass thecenter of the sensors body, the magnetic field switches the open collector relay onand off which generates a square wave pulse as manufactured by Georg FischerPiping Systems SIGNET. One pulse indicates a complete rotation (on/off cycle) of theopen collector relay. The pulse output is directly proportional to the fluid velocity. A Kfactor (number of pulses generated by the sensor per 1 liter or 1 gallon of fluidpassing the sensor) is used to define the size of the pipe that the sensor is insertedinto.8.1.2.2 Rotameters:as supplied by Georg Fischer Piping Systems are radially installed dismountablemeters for flow rate measuring in industrial piping applications. If needed, minimumor maximum flow can also be monitored via limit switches. Also, analogue flowmeasurement with a 4 20mA Signal is possible.The working principle of the rotameter is based in gravity and equilibrium of forces. Ifa medium flows upwards at a sufficient flow rate through the vertically mounted tapertube, the float is raised to the point at which a state of equilibrium sets in between thelifting force of the medium and the weight of the float. Since the mean rate of flow isproportional to the quantity flowing through per unit of time, this state of equilibriumcorresponds to the measurement of the instantaneous flow rate.Following types and sizes are available: Type SK, DN 10 – 65 mmType 335, DN 25 – 65 mmType 350, DN 25 – 65 mm8.1.2.3 MagmeterThe Magmeter sensor of Georg Fischer Piping Systems SIGNET consists of twometallic pins that produce a small magnetic field across the inside of the pipe. TheMagmeter measures the velocity of a conductive liquid (20 µS or greater) as it movesacross the magnetic field produced by the Magmeter. The magnetic field produced bythe sensor is directly proportional to the flow rate of the fluid. The magnetic signal isconditioned and translated in to a pulse signal (K-factor). The Magmeter of GeorgSystem Specification PVC-U BS Inch: Rev 00 – 2010Schaffhausen, 01. March 2010page 11/ 14

- System Specification Fischer Piping Systems SIGNET is offered as a blind output (frequency or 4-20 mA),or with integral display and control relays.8.1.3 Level Sensor (hydrostatic level)Hydrostatic pressure is the pressure exerted on a column of fluid by the weight of thefluid above it. Internal to the Georg Fischer Piping Systems SINGET PVDF sensorbody is a ceramic diaphragm sensor and capillary tube/cable assembly. The ceramicdiaphragm sensor exposed to the fluid senses the hydrostatic pressure of the fluidand compares the pressure to the atmospheric pressure monitored the capillarytube/cable assembly. Because the hydrostatic level sensor from Georg FischerPiping Systems SIGNET only senses the pressure of the fluid, interference andinaccuracies of the signal are dramatically reduced. The measured signals areboosted sent to a Georg Fischer Piping Systems SIGNET Transmitter unit.8.1.4 pH SensorsAll pH sensors from Georg Fischer Piping Systems SIGNET are constructed of threekey elements measuring cell, reference cell and reference junction. The measuringcell is constructed of hydrogen sensitive glass that can detect the concentration ofhydrogen ions ( H) in a solution. The concentration of H ions directly determinesthe pH of the fluid. The reference cell is used to provide a stable reference mV-signalto which the measuring cell compares its own signal. The reference junction allowsthe reference cell to come in contact with the fluid being measured. The measuredsignals are then conditioned and sent to a Georg Fischer Piping Systems SIGNETTransmitter unit.8.1.5 ORP SensorsAll ORP sensors from Georg Fischer Piping Systems SIGNET are constructed similarto the pH sensors, except that a noble metal like platinum or gold replaces thehydrogen sensitive glass. is replaced with a noble metal such as platinum or gold.The noble metal measures the activity of oxidizing or reducing chemicals agents. Theelectrical signals are then conditioned and translated into pulse signals (K-factor),which are sent to a Georg Fischer Piping Systems SIGNET Transmitter unit.8.1.6 Conductivity SensorsAll Conductivity sensors from Georg Fischer Piping Systems SIGNET aremanufactured using two stainless steel electrodes. Alternative materials are availablein case of chemical incompatibil

Any installation should follow the Georg Fischer Piping Systems installation guidelines for industrial piping and the guidelines issued by the DVS. Approved pipes comply with the corresponding quality specifications of DIN Certco ZP 1.1.1. 4. Fittings All PVC-U fittings shall be Imperial (inch)-sized manufactured by Georg Fischer

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