The integration of wedge flowmeter
ZW - LGX seriesThe integration of wedge flowmeterThrottling is manufactured with a special Angle of …
Description：
Products overview:
ZW - LGX seriesThe integration of wedge flowmeterThrottling is manufactured with a special Angle of detection;Two side is smooth and round face, v-shaped wedge vertex Angle of down, this is beneficial to contain suspended particles of liquid or viscous liquid containing water or impurity gas pass, and won't produce stagnation in throttling upstream side, adhesion, precipitation.Based on the unique structure of wedge flowmeter throttle, the fluid is not a sharp contraction in the pipe, the change of fluid pressure is relatively flat, the differential signal is more stable, can ensure traffic, especially the precise measurement of the small flow rate.Wedge flowmeter without deposit, no congestion, the applicable scope is wide, in addition to the application in the general gas, liquid, steam, especially suitable for high viscosity, crystallization, smudgy liquid mixture and high dust gas flow measurement.
Second, the working principle:
ZW - LGX series integrated wedge flowmeter is a fluid flow through the wedge timing, due to the effect of the throttling of the wedge, on which, the downstream side produced a square with flow value differential pressure, the differential pressure from the wedge take pressure on both sides to the differential pressure transmitter into electrical signal output, then through special operations, intelligent flow totalizer.especially can show flow value.
Wedge flowmeter flow equation:
Type of qv - volume flowmeter, m3 / s
C -- -- -- -- -- - outflow coefficient;
Epsilon -- -- -- -- -- to expansion coefficient;
M -- -- -- -- -- - throttling area ratio;
D -- -- -- -- -- - pipe diameter, m;
Delta p -- -- -- -- -- - differential pressure, pa.
Rho -- -- -- -- -- - density measured medium, kg/m3
Wedge flowmeter has the flow coefficient changes, temperature, density, nonlinear error correction function parameters, such as;Measuring accuracy can reach 0.5%;Can be the scene display and standard current output signal (4 ~ 20 ma DC), or can be conveniently used in automatic control system and computer networking, traffic or other parameters automatic adjustment and control.
Applications:
ZW series - LGX integration wedge flowmeter can in high viscosity, low Reynolds number, Reynolds number > 500 can be used) of the fluid for high accuracy of flow measurement;Mainly used for high viscosity (heavy oil, residual oil, diesel oil, engine oil, etc.), industrial gas, coke oven gas, blast furnace gas and producer gas, city gas), hydrogen, nitrogen, air, water and sewage flow measurement of liquid such as medium.
Four, the structure form:
Wedge flowmeter type according to the assembly methods are divided into a shape and separation, according to the connection methods can be divided into flange connection, welding connection, threaded connection and clamp connection, according to the selecting pressure methods can be divided into ordinary take pressure, flange sealing structure, etc.
|  |
The wafer | Threaded connections |
 |  |
Flange connection | Take pressure flange connection flange |
Five, the main features:
1, particularly suitable for high viscosity, low Reynolds number, suspended particles or bubble medium measurement;
2, the measurement precision is not affected by fluid medium dielectric constant features of and restrictions;
3, wedge a special structural design, has guide effect, anti clogging;
4, the density of fluid viscosity, temperature changes, changes and other compensation function;
5, vibration resistance, impact resistance, resistance to dirt, corrosion, explosion-proof;
6, wedge flowmeter has two-way flow measurement function;
7, high measuring accuracy;
8, simple structure, strong, high reliability, convenient installation and operation maintenance cost is low
9, no moving parts, no wear, use for a long time do not need to calibration.
Six, the technical parameters:
A degree, the flow measurement range: > 1;
2, measuring diameter: age from 25 to 1000 mm (over range can be special order);
3, the measuring accuracy: 0.5, 1.6;
4, Renault coefficient using range: 300 ~ 1 x108;
5, measuring liquid viscosity limit: 500 mpa. S.
6, scope of work pressure: 6.2 MPa or less;
7, installation and connection mode: flange connection;Welding connection;
8, flowmeter work environment temperature: - 20 - to + 70 ℃;
9, work environment relative humidity: 15 ~ 85%;
10, power supply voltage: 24 v DC;
11, communication methods: RS495.
Seven, structure:
One-piece installation is composed of intelligent display and wedge orifice device a wedge orifice meter.It comes with a high quality of the differential pressure sensor, pressure sensor, the thermal resistance temperature sensor.Type intelligent display not only in the range of differential pressure sensor range automatically adapt to, and all kinds of compensation coefficient such as: flow coefficient C epsilon, flow beam expansion coefficient are calculated for on-line, expanding truly achieve the scale at the same time guarantee the accuracy of measurement.Using large screen LCD screen display with cumulative flow, transient flow, the instantaneous pressure and transient temperature, without manual switch.4-20 ma two wire system transient flow output.
Eight, classification, description:
According to different product scope of supply, and the output signal, wedge flowmeter can be divided into three categories:
1, wedge sensor;
Provide only the differential signal form part of the wedge device (part), differential pressure transmitter and flow display section is not available, the output signal for the differential pressure.Other configuration shall be conducted by the users themselves.
2, wedge flow transmitter;
By the wedge orifice plate flow sensor and differential pressure transmitter.Have a split type installation and one-piece installation structure.
A wedge, orifice flow meter by independent wedge orifice plate flow sensor and differential pressure transmitter.Wedge orifice plate flow sensor and differential pressure transmitter of pressure pipe connection between performed by users themselves.
B, one-piece installation is product factory has the differential pressure transmitter and wedge orifice connected into an organic whole, users buy one-piece wedge orifice flow meter, don't need to join again when using pressure tube.But must be allocated to the corresponding flow calculator, pressure transmitter and temperature transmitter.
3, cut-off valve and other parts.The connection between the parts combination performed by users themselves.Explosion-proof type and ordinary type two kinds.
Nine, installation considerations:
1, the installation can be horizontal, vertical or inclined, should guarantee the tube filled with liquid.
2, throttle device before and after the straight pipe should be straight, not visible to the naked eye bends, should be "round" at the same time, the inner surface should be clean, without potholes and sediment;
3 and the request of straight section length and throttling device installation should be in conformity with the relevant provisions of the GB/T26224-93.
4, lead pressure pipeline installation should comply with the standards stipulated by the regulations.
Ten, the straight pipe upstream side short see the table below:
Wedge thanH/D | Upstream side small straight pipe length | |||
elbow90o | TForm of a tee | Ball valve | Gate valves (full open) | |
0.2 | 6 | 6 | 10 | 6 |
0.3 | 8 | 8 | 11 | 6 |
0.4 | 12 | 12 | 14 | 8 |
0.5 | 14 | 14 | 16 | 10 |
Eleven, flow range:
1, measuring the liquid flow range:
model | Nominal diameterDN（mm） | Wedge ratio (H/D） | Flow range (m3/h） |
ZW-LGX015 | 15 | 0.2，0.3，0.4，0.5 | 0.11 ~ 2.7 |
ZW-LGX020 | 20 | 0.2，0.3，0.4，0.5 | 0.2 ~ 4.8 |
ZW-LGX025 | 25 | 0.2，0.3，0.4，0.5 | 0.3 ~ 7.4 |
ZW-LGX032 | 32 | 0.2，0.3，0.4，0.5 | 0.5 ~ 12.2 |
ZW-LGX040 | 40 | 0.2，0.3，0.4，0.5 | 0.8 ~ 19 |
ZW-LGX050 | 50 | 0.2，0.3，0.4，0.5 | 1.3 ~ 29.7 |
ZW-LGX065 | 65 | 0.2，0.3，0.4，0.5 | 2.2 ~ 50.1 |
ZW-LGX080 | 80 | 0.2，0.3，0.4，0.5 | 3.3 ~ 76 |
ZW-LGX100 | 100 | 0.3，0.4，0.5 | 8.2 ~ 118.7 |
ZW-LGX125 | 125 | 0.3，0.4，0.5 | 12.8 ~ 185.5 |
ZW-LGX150 | 150 | 0.3，0.4，0.5 | 18.4 ~ 267.1 |
ZW-LGX200 | 200 | 0.3，0.4，0.5 | 32.7 ~ 474.8 |
ZW-LGX250 | 250 | 0.3，0.4，0.5 | 51.2 ~ 741.8 |
ZW-LGX300 | 300 | 0.3，0.4，0.5 | 73.8 ~ 1068.2 |
2, measuring the flow range of gas:
model | Nominal diameterDN（mm） | Wedge ratio (H/D） | Flow range (m3/h） |
ZW-LGX015 | 15 | 0.2，0.3，0.4，0.5 | 1.2 ~ 19.1 |
ZW-LGX020 | 20 | 0.2，0.3，0.4，0.5 | 2.3 ~ 33.9 |
ZW-LGX025 | 25 | 0.2，0.3，0.4，0.5 | 3.5 ~ 53 |
ZW-LGX032 | 32 | 0.2，0.3，0.4，0.5 | 5.8 ~ 86.8 |
ZW-LGX040 | 40 | 0.2，0.3，0.4，0.5 | 9.0 ~ 135.7 |
ZW-LGX050 | 50 | 0.2，0.3，0.4，0.5 | 14.1 ~ 212 |
ZW-LGX065 | 65 | 0.2，0.3，0.4，0.5 | 23.9 ~ 358.2 |
ZW-LGX080 | 80 | 0.2，0.3，0.4，0.5 | 36.2 ~ 542.6 |
ZW-LGX100 | 100 | 0.3，0.4，0.5 | 56.5 ~ 847.8 |
ZW-LGX125 | 125 | 0.3，0.4，0.5 | 88.3 ~ 1324.5 |
ZW-LGX150 | 150 | 0.3，0.4，0.5 | 127.2 ~ 1907.6 |
ZW-LGX200 | 200 | 0.3，0.4，0.5 | 226.1 ~ 3391.2 |
ZW-LGX250 | 250 | 0.3，0.4，0.5 | 353.3 ~ 5298.8 |
ZW-LGX300 | 300 | 0.3，0.4，0.5 | 508.7 ~ 7630.2 |
Twelve, selection of coding:
spectrum | Code name | Shell material | Nominal pressure | Working temperature | Connection and take pressure | instructions |
ZW-LGX | Wedge flowmeter (wei) | |||||
015 | DN15 | |||||
020 | DN20 | |||||
025 | DN25 | |||||
… | ||||||
300 | DN300 | |||||
I | Carbon steel | |||||
II | Stainless steel | |||||
III | Special customized | |||||
0.25 | 0.25MPa | |||||
0.60 | 0.6MPa | |||||
… | ||||||
5 | 5MPa | |||||
A | - 20 ~ 100℃ | |||||
B | 100 ~ 250℃ | |||||
C | 250 ~ 400℃ | |||||
A | Thread with the wafer | |||||
B | Thread take pressure type | |||||
C | Take pressure welded screw thread | |||||
D | Take pressure flange thread | |||||
E | Flange pressure flange | |||||
F | Integration installation (temperature, pressure compensation) | |||||
G | The integration of general type installation |
13 order, design notes:
When you place an order, please provide the following conditions in order to help the correct choice of the specifications of the flowmeter and coefficient.
1, pipe size: diameter x wall thickness (mm);
2, measuring medium name: medium density (kg/m3);
3, set the flow range: meter range of upper limit and lower limit (kg/h or m3 / h);
5, work pressure (Mpa);
6, work temperature: (° C);
7, such as wei in my company, please provide together: intelligent flow totalizer.especially pressure range, or pressure transmitter type, range;Temperature range, or models, range temperature transmitter.
After-sales service commitment:
1, from the date of signing of the contract, I in the way provided for products of the company offers free maintenance and maintenance service, commitment to lifelong maintenance service;
2, jiangsu wei measurement and control instrument co., LTD. Sales manager will be in regular contact with customers, understand the usage of products, and solve the problems of the customers to use in the process of produce, free of charge to provide technical support;
3 the man-made damage is found, the warranty period, our company is responsible for the maintenance, and the resulting maintenance fee;
4, product quality problems or are not satisfied with product, the user can choose unconditional return, wei tt&c don't charge any fees, appear quality problem, bear the freight back and forth.
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