Purge Device KPTD/KPTK/KPTH
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- Gervais Armstrong
- 5 years ago
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1 Purge Device KPTD/KPTK/KPTH
2 KPTD/KPTK/KPTH 2: principle as shown in figure blow:(invariableness inlet pressure) elasticity membrane have the up power P2A+P1a(1) elasticity membrane have the down power: P3A+P2a+F(2) in the pressure balance state,when(1)=(2) P2A+P1a= P3A+P2a+F(3) by the press P2P3, we can gained the blow equation P2P3=F/Aa/A(P1P2)(4) a<a, so a/a(p1p2) can ignore, the F and A is the invariableness, then if the measure medium is liquid which can t constringent. The RE regulator can be the same with the change of output pressure. as the (4) P1 is constant, P3 is variation., so P3: P3+ΔP,P2: P2+ΔP, then C(invariableness)= P2P3 1: Description The kind of KPT product is assembled with the flowmeter of KROHNE and the constant flow valve, in order to measuring the flowrate and keeping the output flowrate constant. Our measuring instruments combine with metal material, high accuracy, reliability, and economy. The instruments are used to help maintain constant flow rates when inlet or outlet press changed. It can apply to the control process of oil, chemical industry, ethane, and fertilizer, steel, spin etc. The designs of the KPT products are satisfy with the request of the industry control, install condition completely according with the requirement of the measure technical. Sketch map 2
3 3:Features Single route, double route, several route(option) Single meter install, faceplate install, tank install(option) 1/4 NPT, adapter, screw thread, flange connection(option) 6mm,8mm,10mm,15mm,25mm pipeline Measuring processes temperature less than 200 Measuring processes pressure less than 13MPa Be the same with corrosive medium and condition. Flowrate,pressure(option) locale indicator Adopt the KROHNE company products: DK32. DK37, H250 Switch signal, 420mA signal output(option) 4:KPT KPT series purge device sort 4.1 KPTD1, KPTD2, KPTDM (several route) series purge device D means equipped with the allmeter miniature flowmeters DK32 RE regulators help maintain a constant flowrate at variable inlet pressure RA regulators help maintain a constant flowrate at variable outlet pressure TE type needle valve at inlet TA type needle valve at outlet Faceplate or tank install, can choose the press meter or strainer 4% control accuracy 4.3 KPTH1, KPTH2, KPTHM (several route) series purge device H means equipped with the flowmeters H250 WE regulators help maintain a constant flowrate at variable inlet pressure WA regulators help maintain a constant flowrate at variable outlet pressure TE type needle valve at inlet TA type needle valve at outlet Faceplate or tank install, can choose the press meter or strainer 1.6% control accuracy 4.2 KPTK1, KPTK2, KPTKM (several route) series purge device K means equipped with the allmeter miniature flometers DK37 2.5% control accuracy The same as KPTD to choose regulator and needle valve 3
4 5:Technical date 5.1 KPTD,KPTK parameter with DK32,DK37 Model DK32 DK37 Measure range Water : l/h 3100 l/h (100% values) Air:0.1MPa l/h l/h Turndown ratio 10:1 10:1 Accuracy class*(vdi/vde code 3513 sh.2) Scale graduation Flow units Flow units Max pressure Standard 6.4MPa 6.4MPa Special 13MPa(supplied on 13MPa(supplied on request) request) Medium temperature Standard 80~150 80~180 Special 200 (supplied on request) 200 (supplied on request) Ambient temperature 25~65 25~65 Contact medium material Gasket PTFE PTFE Housing Die cast aluminum Die cast aluminum Process connection Standard adapter 6, 8, 10mm 6, 8, 10mm Standard thread 1/4 NPT, 1/2 NPT 1/4 NPT, 1/2 NPT Standard flange 1/2 ANSI150lb; DIN2501 1/2 ANSI150lb; DIN2501 Special supplied on request supplied on request 5.2 KPTD,KPTK flow table (DK32 or DK37) Reference condition :water;20 air:20,0.1013mpa(a), According to the fact medium parameter, we will conversion as follow Cone No. Valve spindle diameter mm Water l/h (100%) Air l/h (100%) Press loss kpa K K K K K K K K K
5 5.3 KPTD,KPTK series is equipped with RE or RA regulator Regulator type RE RA Apply condition Constant inlet Constant outlet pressure P2 pressure P1 Medium state Liquid or Liquid or gaseous gaseous Medium temperature Standard Special Medium pressure Standard 6.4 MPa 6.4 MPa Special 10.0 MPa 10.0 MPa (supplied on request) (supplied on request) control pressure range MPa MPa Differential pressure* MPa MPa Accuracy class 2.5% (DK37) 2.5% (DK37) 4.0% (DK32) 4.0% (DK32) Min. work pressure MPa MPa (curve table) (curve table) Min. differential pressure MPa(curve table) MPa(curve table) *Differential pressure between inlet and outlet pressures Inlet pressure regulators type RE Outlet pressure regulators type RA 5
6 5.4 KPTH series parameter with H250 Model H250 Measure range(100% value) Water : l/h Air:0.1MPa m 3 /h Turndown ratio 10:1 Accuracy class (VDI/VDE code 3513 sh.2) 1.6 Scale graduation Flow units Max pressure Standard 4.0MPa Special 10 MPa(supplied on request) Medium temperature Standard 80~180 Special 200 (supplied on request) Ambient temperature 25~65 Connect medium material 304, 316, 316L Gasket PTFE Housing Die cast aluminum Process connection standard adapter 12mm standard thread 1/2 1 NPT, 1/2 1 G standard flange 1/2 1 ANSI; DIN2501 special supplied on request 5.5 KPTH flow table with H250 Float shape water:civ,div;air:tiv,div Reference condition water:20 ;air:20,0.1013mpa Caliber Water Air Loss pressure DIN ANSI Cone No. CIV DIV TIV* DIV CIV TIV DIV DNmm Inches l/h l/h m 3 /h m 3 /h kpa kpa kpa 15 1/2 K K K K K K K K K 25.1 K 25.2 K 25.3 K 25.4 K
7 5.6 KPTH series equipped with WE or WA regulators Model WE WA Apply condition Constant inlet Constant outlet pressure pressure Medium state Liquid or gaseous Liquid or gaseous Medium temperature Standard Special Medium temperature Standard 6.4 MPa 6.4 MPa Special MPa(supplied on request) MPa(supplied on request) Control pressure range MPa MPa Differential pressure MPa MPa Accuracy class 1.6% 1.6% min operation pressure MPa (curve MPa (curve table) table) Min. differential pressure MPa (curve table) MPa (curve table) Inlet pressure regulators type WE outlet pressure regulators type WA 6:Application 6.1 The special application when provide gaseous pressure is changed. As shown in figure right, divide the gas which is provided from main pipeline into several spur tracks. When you close or adjust several spur track flow rate, the pressure of main pipeline will variable, the KPT signal purge device which is equipped with the spur track can measuring the flow rate and maintain a constant output flowrate. Recommend product type KPTD1SRETE (DK32) KPTK1SRETE (DK37) KPTH1SWETE (H250) 7
8 6.2 The special application when outlet pressure is changed liquid level measuring As shown in figure right, when the flowrate which from A is constant, the medium will expel from the pipeline which is insert into the liquid, then form the form air bladder. At the same time, sum pipeline pressure A and B equivalent the liquid pressure B. If the pressure of B is P1, the atmospheric pressure is P0 Then P1P0=ΔP, P1=γh+P0 so P1P0=γh=ΔP So if you know the medium density, using pressure gauge to measure ΔP, you can gain liquid level h. Recommend product type: KPTD1SRATE (DK32) KPTK1SRATE (DK37) KPTH1SWATE (H250) 6.3 The special application when outlet pressure is changed density measuring As shown in figure right, if you know the medium level liquid H1 which is measured,the reference medium level liquid H2, and the reference medium density γ2, you can use the regulator measuring the differential pressure, then can gain the medium density γ1 which is measured. Recommend product type KPTD2PRATE (DK32) KPTK2PRATE (DK37) KPTH2PWATE (H250) 6.4 The special application when use differential pressure regulator to measuring flowrate The channel pressure capillary will airlogged when you use the differential pressure regulator to measuring the corrosive or liquid which is contain solid grain. Use the double route to blow the two pressure bore, in order to make the pressure bore or the channel pressure capillary cleanly. Recommend product type KPTD2PRETE (DK32) 8
9 KPTK2PRETE (DK37) KPTH2PWETE (H250) 6.5 The purge device which is use to the blast furnace stack static pressure Blast furnace stack static pressure is the gist which can calculate the furnace breathe freely brag index. it is possible to strictly detect the stack static pressure, convert the pressure into electric signal, then input the date to computer, after compensation calculate, it can seriate display the pressure curve which along the stack height, in order ahead of time to forecast the stack state, control the stack produce and increase production. Recommend product type KPTH2PWETE (H250) KPTH6PWETE (H250) 7:KPT sketch map and dimensions KPTD1SRETE 9
10 KPTD1SRATE KPTD1SRETEF KPTD1SRATEF KPTD1PRATE KPTD2PRETE KPTH1SWETE adapter connection KPTH1SWETE flange connection 10
11 KPTH1SWATA adapter connection KPTH1PWATA adapter connection KPTH6PWETE 6 H250 install in a tank 8: Pay more attention to the install proceeding Supported by process piping to install the purge device, insure to adjust, cleanout, disassembly the flowmeters convenience; The flowmeters is equipped with a magnetic longdistance date transmission system. Make sure that magnetic fields caused by other locally installed equipment will not affect measuring results. Installation, insure the flowmeters level off; fastness bracket is required to install the appropriate place. Mounting dimension should not too much or too few, avoid the flowmeters being subjected to any tensile or compressive force stemming. When the medium contains ferromagnetic particles, filtration the magnetic grain 11
12 before install meter. 9: Running the KPT series purge device Notice Insure the medium liquid direction is consistent with request direction of purge device.pay more attention to close the entire needle valve when to install the flowmeters. Liquid measuring Vent out the pipeline carefully before startup, avoid bringing impact action please slowness open the valve Gaseous measuring Please slowness open the valve, then adjust the pressure to operating pressure. Adjust the valve to change the flowrate, in order to avoid float suddenly bumping float guide (e.g. In the condition of using electromagnetism valve, may shatter the measure parts), 10:Model instructions Because the flowmeters purge devices have more install type, the customer should confirm the product type according to his practically request. If you have some special requirement, our sales manager and technologist will give you satisfied type and sketch map Model KPT D 1 S RE TE P K 2 P WE TA G H M RA 0 WA Type digit character meaning 1. D: equipped with DK32 K: equipped with DK37 H: equipped with H : single route 2: double route M: supply on customer s request 3. s: single meter type p: faceplate assembled type 4. RE.WE: regulator used in inlet RA.WA: regulator used in output 5. TE: needle valve in inlet TA: needle valve in outlet 6. process connection type, reference thereinafter code 7. P: press meter G: strainer 12
13 13
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