Metal tube variable area flowmeters for gases, liquids and steam

Transcription

1 Metal tube variable area flowmeters for gases, liquids and steam Metallic with a robust construction, optional in plastic Indication by means of magnetic coupling Linear scales, calibrated in l/h, m3/h, kg/h, t/h, %, etc. Sizes DN15 to DN150 High performance measurement in extreme working conditions High resistance to temperature, pressure and corrosion Flow rate: - Water: 2.5 l/h up to 180 m3/h - Air: 0.07 Nm3/h up to 5400 Nm3/h Low pressure drop Damping mechanism to avoid float bounces in gas applications Flow measurement in horizontal pipes and in vertical pipes with downwards flow with the model SC250H Standard construction: EN (SS 316L), PVC, PP, PTFE, Titanium, Hastelloy Connections: - Flanges DN15 to DN150 standard in stainless steel EN (SS 316L) - Other flange standard on request (ANSI, JIS) - Screwed connections BSP or NPT - Sanitary connections to DIN 11851, CLAMP ISO 2852, SMS 1145 Total length DIN 2501 flanges: - DN15...DN125: 250 mm - DN150: 300 mm Local indication Options: - 1 or 2 limit switches - Electronic transmitter with 4-20 ma analog output for safe or hazardous area with EEx ia IIC T4/T6 (ATEX) protection - Local or remote volume totalizer

2 Measurement Principle The SC250 is a variable area flowmeter made with a totally automated construction and standard pieces, that provides a high precision in flow rate measurements. The precision is ± 2.5 % or ± 1.6% according to VDI /VDE 3513, Sheet 2. The metering system consists on a calibrated orifice and a conical float. The force from the fluid, as it flows from the bottom to the top, displaces the float until it reaches an equilibrium point that is a function of: - The weight of the float: Pf - The force of the fluid flow: E - The free area of flow: AI Each float position represents a different equilibrium point which has a corresponding flow rate. Applications These instruments are suitable for all kinds of industries, especially: - Water treatment - Pharmaceutical industry - Power plants - Nuclear generating plants - Chemical and petrochemical industry - Pulp & paper industry - Food industry - Heating and cooling Circuits - Saturated steam circuits - Oven treatments - Control of gas burners, etc. Technical Data Precision according to VDI /VDE 3513, Sheet 2. SC250 (max. 10 mpa s) +/- 2.5% at full scale +/- 1.6% at full scale, special version on demand SM250 (max mpa s) +/- 1.6% at full scale Scales: - Direct in engineering units or in % - Length: 120 mm (reading length max. 100 mm) Scale range: 10:1 Temperature of fluid: - Standard; -50ºC to +200ºC EN (SS 316L) -20 C to +150 C PTFE 0ºC to +50ºC PVC // -5 to +90ºC PP - For higher process temperatures, see thermal separator page 9 Ambient temperature: -20 C to +80 C SS 316L, PTFE 0ºC to +45ºC PVC -50ºC to +80ºC PP Working pressure: - SC250/INOX (EN SS 316L) PN40 DN15...DN50 PN16 DN65...DN150 (others on request) - SC250/PVC T/PP T (Fully PVC / Fully PP) PN16 DN15...DN125 PN10 DN150 - SC250/PVC/PP/PTFE (EN SS 316L + PVC/PP/PTFE) PN40 DN15...DN40 PN16 DN50...DN125 PN10 DN150 (others on request) Mounting Length: - SC250 INOX/PTFE/PVC/PP DN15...DN125: 250 mm DN150: 300 mm The mounting length is the same for the flowmeters with damping system to measure flow rates of steam or gases. Indicator housing: Standard: IP65 - Coated aluminium On demand: IP65 - polypropylene, IP67 - EN (SS 316L) Limit switches and transmitters.../amm1...2 ; 1 or 2 adjustable micro-switches.../amd1...2 ; 1 or 2 adjustable inductive detectors (+relays on order) TH4... TH4H 4-20 ma transmitter 2 wire; HART TM protocol on demand TH32Ex 4-20 ma transmitter 2 wire EEx ia IIC T4 (ATEX) TH4T...TH4TH Transmitter +Totalizer 2 wire; HART TM protocol on demand TH32TEx Transmitter +Totalizer 2 wire EEx ia IIC T4 (ATEX) TKEx 4-20 ma Transmitter 2 wire EEx ia IIC T6 (ATEX) TP1200 Pneumatic Transmitter 3-15 psi (0.2-1 bar) 2

3 SC250 & SM250 Indicator Box Materials SC250 Item Description Materials 70 Indicator Box Coated Aluminium 71 Indicating needle Aluminium 72 Scale plate Aluminium 73 Shaft EN (SS 316L) 74 Ball Bearing EN (SS 316L) 76 Magnet Alnico 77 O-ring Nitrile rubber 78 Window Polycarbonate (UV treated) SM250 SC250 & SM250 Flow Tube Materials Materials Item Description EN PVC/PP PTFE 91 Flow tube EN PVC/PP PTFE/SS 92 Calibrated orifice EN PVC/PP PTFE 93 Float EN PVC/PP PTFE 94 Magnet - - Alnico - 95 Flanges EN PVC/PP EN Flange Seat EN PVC/PP PTFE 97 Tapered Tube EN PVC/PP PTFE The tapered FC floats and the constant section T, V & TX floats are constructed in SS 316L, PVC, PP & PTFE as standard or other materials on demand, according to the characteristics of the fluid to be measured. The maximum working viscosity for the FC floats of the SC250 flowmeters is 10 mpa s. The maximum working viscosity for the T floats of the SM250 flowmeters is mpa s. SC250 Series Floats SM250 Series Floats Maximum liquid viscosity 10 mpa s Maximum liquid viscosity mpa s (type T) 3

4 Standard scales SC / / /4 ** /1/ / * For SC250 INOX (SS 316L) and from 150# to 2500# ** 1 on demand 4

5 Dimensions for SC250 & SM250 series with DIN Flanges x x x x x x x x x Dimensions for SC250 & SM250 series with ANSI Flanges 1/2" X /4" X " X /4" X /2" X " X /2" X " X " X " x " x

6 Limit Switches and Transmitter Options Adjustable limit switch SC-AMM...SM-AMM Electrical micro-switch mounted in the indicator housing. SC/SM-AMM1...2: adjustable limit switches Ratings: 3(1) A, 250 V (VDE/CEE) Hysteresis: ±10% of full scale value Ambient temperature: -25 C to +80 C Mechanical life: 10 7 Operations Gold plated contacts on order. Adjustable limit switch SC-AMD...SM-AMD NAMUR (DIN19234) 3.5 mm slot type inductive detector activated by vane, mounted in the indicator housing. SC/SM-AMD1...2: adjustable limit switches Detector power supply: 8 Vdc Ambient temperature: -25 C to +70 C Control Relay (on demand) NAMUR (DIN19234) for 1 or 2 inductive detectors. Power supply: V ac Hz V dc Input: NAMUR EEx ia IIC Output: 1 or 2 inductive detectors Output Rating: A / 40 Vdc Electronic transmitter SC-TKEx...SM-TKEx The TKEx electronic transmitter is an angular position converter coupled to the indicating system of the flowmeter and uses a 2 wire connection. It provides a linear output of 4-20 ma proportional to the flow rate. It is intrinsic safety ATEX certified to EEx ia IIC T6. Power supply: Vdc Output signal: 4-20 ma Electrical connection: 2 wire Short circuit current: <160 ma Internal Inductance: Li=0 Internal Capacitance: Ci 10 nf Ambient Temperature: -20 C to +40 C Pneumatic Transmitter SC-TP SM- TP1200 The TP1200 pneumatic transmitter provides a 3-15 psi or bar, proportional to the flow rate. Air supply 1.4 bar ± 0.1 bar Air consumption 460 NI/h Output signal 3-15 psi (0.2-1 bar) Linearity ± 0.4% Hysteresis ± 0.25% Ambient temperature C 6

7 Transmitters and totalizers HALLTEC The HALLTEC electronic transducers provide an analog output proportional to the flow rate and can include a volume totalizer with a pulse output. They are based on the Hall effect and they are mounted in the indicator housing. HALLTEC IV Technical characteristics TH4 Transmitter TH4H Transmitter + HART TM TH4T Transmitter + Totalizer TH4TH Transmitter + Totalizer + HART TM Power supply: 2 wire, Vdc Power consumption: max. 20 ma less than 2 VA Outputs: Analog output ( ma): - Precision: < 0.6% of the magnet position - Maximum load in 4-20 ma loop: 2 kω (with 50 Vdc power supply) Pulse output: Potential free N channel MOSFET - Imax. 200 ma - Max. frequency 2 Hz - Pulse duration approx. 250 ms Totalizer: 9 digits, 4.5 mm high Reset by potential free contact Ambient temperature: -5 C to +70 C The TH32Ex and TH32TEx belong to group II. They are destinated for use in locations where there may be the hazard of the formation of explosive atmospheres, except for mining. HALLTEC III (EEx ia IIC T4 ATEX) Technical characteristics TH32Ex Transmitter TH32TEx Transmitter + totalizer Power consumption: ma for % of scale Output: Analog output ( ma:) - Precision: < 0.6% of the magnet position - Maximum load in 4-20 ma loop: 700 Ω (with 24 Vdc power supply) Totalizer: 9 digits, 4.5 mm high Reset by potential free contact Ambient temperature: -5 C to +70 C NEW INDICATOR BOX AND NEW ELECTRONICS AVAILABLE SOON: New modular design for switches and electronic transmitters. HALLTEC V New series of transmitters HALLTEC V with analog output, totalizer, pulse output, HART TM protocol compatibility and ATEX version. Both limit switches (AMM or AMD) and electronic transmitters TH5 and TH5T can be mounted together in the same indicator box. 7

8 SC250 Sanitary fitting SC250 Threaded fittings BSP or NPT EN (SS316L) 8

9 Thermal Separator DT Standard in aluminium, optional in EN (SS316L) For working with fluids at high and low temperatures With electronics DN15...DN65: -180 C to +300 C DN80...DN150: -180 C to +260 C Without electronics DN15...DN150: -180 C to +400 C Reference ambient temperature = 20 C Explosion Proof Enclosure Porthole with glass for viewing the flow rate In the inside, the SC...SM-250 housing with standard limit switches and transmitters Explosion proof protection: EExd IIC T6 Ingress protection: IP65 SS 316L Housing for SC250 & SM250 Stainless Steel Housing CTI series Specially indicated for working within sanitary or sterile installations For saline atmospheres (marine platforms), etc. All stainless steel construction EN (SS 316L). Can fit standard limit switches and Halltec transmitters. Ingress protection: IP67 9

10 Float Damping System (for gas applications) Ceramic, PEEK or metallic piston system for avoiding float oscillations in flowmeters for gas service, obtaining stable readings even with very low working pressures and low gas densities. Available for DN15... DN80 1. Upper float stop 2. Float 3. Piston 4. Piston locking circlip 5. Guide cylinder 6. Circlips for locking upper float stop & guide cylinder Magnetic Particle Filter For liquids with magnetic particles in suspension, the installation of a magnetic filter is recommended. MAG-1 series, constructed in stainless steel EN (SS 316L) MAG-5 series, constructed in PTFE Other materials on demand The permanent magnets are encapsulated in the filter material. The magnets are mounted helicoidally to improve the capturing of magnetic particles. Double Heating-Cooling Chamber For installations that require maintaining the measured fluid temperature by means of the circulation of a heating or cooling fluid through the double chamber of the flowmeter. Without contact with the measured fluid Flanged or threaded pipe fittings (BSP, NPT, DIN 2501) Other standards on demand Pipe fitting diameters according to the table below Stainless steel EN (SS 316L) Other materials on demand

11 SC250 Series SC250 Floats SC250 Standard scales

12 NEW: SC250H The SC250H is a version of the SC250 flowmeter that can be installed in horizontal pipes with flow from left to right or right to left, or in vertical pipes with downwards flow. The precision is +/-2.5% or optionally +/- 1.6% according to VDI/VDE 3513, Sheet 2. The SC250H is suitable for the flow measurement of liquids or gases and can be equipped with additional switches, transmitters and options like the SC250 Series. The standard materials for the floats are PP, PTFE and optionally AISI-316L (EN ) for high pressure and temperature applications. Operation Standard Scales SC250H The metering system is made up of a calibrated orifice, a conical float and a spring. The force from the fluid, as it flows through the flowmeter, displaces the float and compresses the spring, reaching an equilibrium point which corresponds to a specific flow For the Quality Assurance System according to ISO 9001, Tecfluid S.A. is certified by For the Pressure Equipment Directive 97/23/CE, Tecfluid S.A. is certified by For the ATEX Directive 94/9/CE, Tecfluid S.A. is certified by Please, look at page no. 5 for dimensions. R-CT-SC Rev. :1 English version