AccessoriesofThrottling Device

1. Condenser

2.Isolator

1.1 Purpose of condenser

FL-64 condenser is an accessory for measuring steam flow.It is filled with condensate and installed between theflowmeter and the throttling device to prevent steam entering the meter directly.

1.2 Technical dataof condenser

1. Working pressure: 6.4 MPa (64kgf/cm^{2})
2.Specification:

2.1 Purpose of isolator

FG isolator is an accessory for measuring theflow of corrosive liquid or gas.FG-64A isolator is used when specific gravity of the measured medium is less than that of the spacer liquid, and FG-64B isolator is used when specific gravity of the measured medium is greater than that of the spacer liquid.The isolator deviceislocatedbetweentheinstrumentandthe throttling element,and protectiveliquidis injected into the isolator and the impulse pipe behind it,so that the instrument will not be corroded by the measured liquid or gas.)

2.2Technicaldata ofisolator

1. Working pressure: 6.4 MPa (64 kgf/cm)
2.Specification:

2.3Installationdimension ofisolator

Diagramforinstallation dimension ofFG-64 isolator (as follows)

3.Balance

3.1Purpose ofbalancer

FP-64A and FP-64B balancers are accessories for measuring liquid levels. The FP-64A single-layer balancer is used for measuring the liquid level of open or low pressure vessel.

The FP-64B double-layer balancer is adopted for measuring the water level ofboiler water drum.

3.2Technical data ofbalancer

1. Working pressure: 6.4 MPa (64 kgf/cm)
2. Measuring range:

Determined by the differential pressure measuring range of the differential pressure gauge for the FP-64A type

±1.8kpa~±5 kpa for the FP-64B type

3.3Installation dimension of balancer

Diagram for installation dimension of FP-64 balancer (as follows)

FP-64A

FP-64B

4. Pressure tapping pipe and pipe fittings

The standard valve diameters of throttling devices are mainly DN6 and DN15, and the corresponding outer diameter and wall thickness of the pressure tapping pipe are \boldsymbol{\Phi}14x\boldsymbol{3} and \boldsymbol{\Phi}22x4 .Common pressure tapping pipes include straight pressure tapping pipes and S-shaped pressure tapping pipes, and the outline is roughly as follows:

5.Three-valveManifoldand Five-valveManifold

When the integrated throttling device needs to beequippedwith a three-valvemanifold(or five-valvemanifold),differentmountingbolts shall be provided for installing differential pressure transmitters of different brands. If the differential pressure transmitter is not purchased by us, please provide the brand of differential pressure transmitter to help select the corresponding valve group mounting bolts.

Precautionsfortheselectionofthree-valve manifold (or five-valve manifold):

1.There are two common spacings for valve groups, which are 35\mm and 54~mm respectively depending on different installation spacings, and shall not be exchanged. 2. Check the valve group for proper pressure during selection. 3.Payattentiontothe applicabilityofgaskets accordingtodifferentapplicablemediaof thevalve group. 4. The manufacturer of valve group shall have the TS special equipment production license due to the requirements for product safety.

High risk of safety accidents <br>Five-valveManifold

ScheduleIData Correction after RealFlow Calibration

Duringtherealflowcalibrationofdifferential pressure flowmeter, the coefficient detection method is generally adopted to measure the discharge coefficient or flow coefficient of differential pressure devices. The basic flow formula of differential pressure flowmeter is as follows:

The product of discharge coefficient in the above formula multiplied by theflow coefficient \mathfrak{a} is the theoretical value in the design calculation, which can alsobeobtainedafterrealflowcalibrationand recorded as C1or a1.SubstitutingC1or a1into the aboveformulaor theformulainthedesigncalculation for recalculation can correct the theoretical value and improve the accuracy. Generally, two methods,i.e. flow value correction or range change of differential pressure transmitter, are adopted, as follows:

{Mass~flow}q_{m}={(C)/(√(1-{\boldsymbol{β))^{4}}}}*{\boldsymbol{\varepsilon}}*{(π)/(4)}*{\boldsymbol{d}}^{2}*{√(2\Delta P*\rho)} Or q_{m}=α*\varepsilon*(π)/(4)* d^{2}*√(2\Delta P*\rho)
{Volume~flow}\quad q_{V}={(C)/(√(1-{β^{4))}}}*\varepsilon*{(π)/(4)}*{d^{2}}*√(2\Delta P/\rho) Or q_{\nu}=α*\varepsilon*(π)/(4)* d^{2}*√(2\Delta P/\rho)
C -discharge coefficient
\mathfrak{a} -flow coefficient α=(C)/(√(1-β^{4))}
Flow correction: q_{m1}=q_{m}*(C_{1})/(C)\quadOr\:\:q_{V1}=q_{V}*(C_{1})/(C)
Range change of transmitter: \trianglePl{=}\triangleP*\left(C/C1\right)^{2}
C - theoretical discharge coefficient
\mathfrak{a} -theoreticalflow coefficient
C1 -actual discharge coefficient
a1-actualflowcoefficient
qm-theoretical mass flow
qm1-actual mass flow
qv-theoreticalvolumeflow
qv1 -actual volume flow

Schedule II Precautions for Ordering

In order that the Design and Production Department can accurately design, calculate and manufacture the throtling device according to the users requirements, the user shallprovide detailed technical parameters when ordering orfillin clearly according totherequirements ofthe purchase order.

Contact List for Technical Parameters of Throttling Device

Purchaser: Address: Contact: Tel.: Qty:

Filling notes:

① Theparatist antract halldasthbasirenhatastrt aauratcnistt
and shall not be altered; ② Therefere statefthgasflwt shalleltdcoretlythwistilhaegreatactontheasu
accuracy. ③ The sum ofthe volume percentage ofthe gas mixture shall be equal to 100% ④ When the measured fluidis water or steam,the density and viscosity ofthe fluid maynot be filled in; ⑤ Ifthe userhasn pecialquirements,theflangesfcomonents shalle providdaording totheComany's standad.

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