PKGW13 Vortex Flow Meter

NegotiableUpdate on 08/17

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Overview

PKGW13 Vortex Flow Meter Product Overview 1. Overview: PKGB Vortex Flow Meter is a new type of flow meter developed using the principle of fluid vibration

Product Details

PKGW13 Vortex Flow Meter

product overview

1、 Overview:
The PKGB vortex flowmeter is a new type of flowmeter developed based on the principle of fluid vibration, widely used in the measurement of fluids in industries such as petroleum, chemical, metallurgy, and papermaking. This flowmeter has no movable parts, strong reliability, high accuracy, and long service life, and can accurately measure the instantaneous flow rate and cumulative flow rate of liquids over a wide flow range. It is not affected by the temperature, pressure, viscosity, and composition of the medium, and is not blocked, stuck, easy to scale, resistant to high temperature and high pressure, safe and explosion-proof, suitable for harsh environments. Integrated display and remote transmission of flow scoring, and can output pulse signals or current signals to be networked with a microcomputer.

2、 Measurement principle:
When a fluid flows through a vortex generator set in a smooth flow at a certain velocity, a pair of alternating and neatly arranged vortex columns (vortex streets) are generated downstream of the cylinder, first on one side of the cylinder and then on the other side of the cylinder. The theory of vortex generation was first proposed by Karman, named Karman vortex street, and the relationship between frequency and flow velocity was given, where the coefficient was named Strouhal number.

3、 Basic technical parameters:
◇ Nominal diameter: 15~2500mm
Measurement medium: liquid, gas, vapor
◇ Medium temperature: -40~350 ℃ (capacitive: -60~450 ℃)
◇ Connection methods: flange card type, flange type, plug-in type
◇ Nominal pressure: 2.5MPa, 4.0MPa, 6.9MPa, 25MPa
Accuracy level: 1.0 level (liquid, gas), 1.5 level (steam), 2.5 level (plug-in)
◇ Repeatability: ≤ 0.3%, 0.5%, 1.0%
◇ Body Material: Stainless Steel 304, Stainless Steel 316L
◇ Load resistance:<750 Ω
Power supply: 24VDC, 3.6V lithium battery
Output signal: pulse frequency, 4-20mADC, RS485, Hart protocol
Flow rate range: liquid 0.5~6m/s, gas 5~60m/s
Explosion proof grade: ia Ⅱ CT1-T6 intrinsic safety type (used in conjunction with Zener safety barriers)
Protection level: IP65, IP67, IP68

4、 Outline dimension diagram:(Unit: mm)

Caliber (D)	Pipeline specifications	H	L	L0	D1	D2
15	Φ19×1.5	290	116	80	68	135
20	Φ26×3	290	116	80	68	135
25	Φ32×3.5	290	116	80	68	135
32	Φ39×3.5	290	116	80	68	135
40	Φ49×4.5	295	120	80	80	140
50	Φ59×4.5	300	124	80	88	145
65	Φ74×4.5	308	128	80	105	165
80	Φ89×4.5	315	128	80	120	180
100	Φ109×4.5	328	132	80	148	210
125	Φ133×4.5	340	137	85	174	235
150	Φ159×4.5	351	146	90	196	270
200	Φ219×9	378	169	105	250	325
250	Φ273×11	402	184	120	300	375
300	Φ325×12	428	199	135	350	425

5、 Liquid flow range: Table (2)

Nominal Diameter DN(mm)	Liquid (reference medium: room temperature water m)³/h)
Nominal Diameter DN(mm)	Standard type	extended
15	0.8~6	0.5~8
20	1~8	0.5~12
25	1.5~12	0.8~16
32	1.5~20	1~25
40	2.5~30	2~40
50	3~50	2.5~60
65	5~80	4~100
80	8~120	6~160
100	12~200	8~250
125	20~300	12~400
150	30~400	18~600
200	50~800	30~1200
250	80~1200	40~1600
300	100~1600	60~2500
400	200~3000	120~5000
500	300~5000	200~8000
600	500~8000	300~10000

6、 Selection of flow range under operating conditions:

The measurement range of vortex flow sensors and transmitters varies depending on the caliber and medium, and the selection of special media needs to be determined through calculation.

The upper limit flow rate of a vortex flowmeter is generally not affected by the pressure and temperature of the medium. The flow range mainly depends on the working density and kinematic viscosity of the medium. Therefore, the determination of the flow range is actually to calculate the available lower limit flow rate.

Calculation 1: First, calculate the lower limit flow rate Q of the operating condition determined by density_PFormula 15:

Q_P= （m³/h）

In the formula: Q_PThe lower limit flow rate of the instrument under the working condition density of the medium

Q_oThe lower limit flow rate of the instrument under reference conditions (m)³/h）

ρ_oReference air density, P_o=1.205kg/m³

ρ: Density of the tested medium under working conditions (kg/m)³）

Calculation 2: Calculate the lower limit flow rate Q determined by the kinematic viscosity_vformula

Q_v=Q_v·V/V_o（m³/h）

In the formula: Q_v: Lower limit flow rate for this medium

Q_oLower limit flow rate under reference conditions (m)³/h）

V_oReference viscosity, 15 kg m/s²

V: Operating viscosity of the tested medium (kg m/s)²）

Compare Q_PWith Q_vA relatively large flow rate is used as the actual lower limit flow rate of the gas.

Saturated Steam Mass Flow Range Table (kg/h) Table (III)

Density of superheated steam relative to pressure and temperature (kg/m)³）Table 4

1. The flow range of the liquid is shown in Table (2). If the measured medium is not ρ=1000 kg/m³It can be calculated according to the formula.

2. Please refer to Table (3) for the selection of saturated steam.

3. The density of superheated steam corresponding to pressure and temperature can be obtained through Table (4), and the flow range of the density similar to Table (3) can be determined as the flow range of the superheated steam.

7、 Installation conditions:

1. Sensors should be installed horizontally or vertically (with liquid flowing from bottom to top) on pipelines corresponding to their nominal diameter.

2. A certain length of straight pipe section should be installed upstream and downstream of the sensor, and its length should meet the requirements specified in the table below.

Length configuration of straight pipe section

Upstream pipeline form	Length of upstream straight pipe section	Length of downstream straight pipe section
Concentric tube fully open gate valve	≥12DN	≥5DN
Concentric contraction fully open gate valve	≥15DN	≥5DN
A 90 ℃ elbow	≥20DN	≥5DN
Two 90 ℃ elbows on the same plane	≥25DN	≥5DN
Two 90 ℃ elbows on different planes	≥40DN	≥5DN
Regulating valve, semi open gate valve	≥50DN	≥5DN