Mechanical flowmeteranother name：Pointer flowmeter; Pointer type flow indicator; Graduated flowmeter; Mechanical flow indicator

Mechanical flowmeter(Belonging to the category of instrument valves) is a necessary accessory for observing the flow of media in pipelines and measuring flow rates. Widely used in cooling systems、In industrial production equipment such as lubrication systems, fuel supply systems, chemical, synthetic, pharmaceutical, food, power stations, and pump equipment, the ability to observe the flow reaction and flow rate of liquid, gas, steam and other media at any time is an indispensable accessory to ensure normal production. Its main connection methods: threaded, welded, flangeFormula.

Under the premise of transparent window glass, visually check whether the pointer swing angle matches the scale of the window to determine whether the medium is flowing or whether the flow rate is fast or slow, and whether the pipeline and equipment are operating normallygo.

Mechanical flowmeter advantage:

♦Mechanical flow meters do not require the installation of electronic instruments on the valve body. They operate in a mechanical mode by combining pointers with window scales, overcoming the historical problem of electronic flow meters requiring power to start the electronic instruments to achieve flow measurement effects and being unable to operate in harsh conditions such as high temperature and high pressure.

♦Mechanical flow meters do not require power to start and are operated mechanically by the impact force of medium flow. They are widely used in blast furnace cooling systems, lubrication systems, fuel supply systems, chemical, synthetic, pharmaceutical, food, power plants, pump equipment, petrochemical industries, and other fields due to their high temperature and high pressure resistance.

Mechanical flowmeterThere are various types such as gear type, float type, water meter type, etc; It is necessary to select the corresponding flowmeter based on the characteristics of the measuring medium.

The price of flow meters varies with the selection specifications, caliber, and configuration, and is not a fixed price product. It needs to be selected and quoted according to your operating conditions.

(Pure mechanical display instantaneous flow without cumulative vertical installation)

technical requirement

1. Measurement range: water (2.5-60000) L/h;

Air (0.07-2000) m³/H (at 0.101025 MPa, 20 ℃).

2. Accuracy levels: 1.5 and 2.5.

3. Range ratio: 10:1.

4. Work pressure: DN15-50, 4 MPa; DN80～100，1.6MPa。

5. Medium temperature: -80 ℃~200 ℃ (F46 flowmeter with lining 0 ℃~80 ℃).

6. Viscosity of liquid medium: DN15 ＜ 5mPa · s; DN25～100＜5mPa·s。

7. Connection methods: flange connection, threaded connection, etc.The flange adopts the GB/T9119.8-10 standard.

8. Total length: DN15-100 250mm.

9. Material of measuring tube: ordinary type 1Cr18Ni9Ti, corrosion-resistant type Cr18Ni12Mo2Ti, 316L, 316 lined F46, etc.

Product display of the same series:

(Intelligent type)

(Lower limit alarm type)

(Horizontal installation type)

(Large caliber size DN150)

Mechanical flowmeter--Elliptical gear flowmeter

Purpose: Suitable for measuring various oils and high viscosity medium liquids, such as crude oil、diesel oil、Gasoline, resin, etc.

Advantages: Can be installed horizontally or vertically; The header can be rotated, and functions such as zero return alarm can be customized and added.

Installation method: flange, thread.

Required parameters for selection: fluid name, fluid viscosity, pipeline material and diameter, maximum and minimum working pressure, medium temperature, flow range, and on-site operating conditions requirements.

Common models:HLC-20A11

Model annotation：mechanicalThe measuring medium is oil and the temperature is below 100 degrees, DN20， Rated pressure 4.0MPa，The body material is cast iron，accuracy0.5，Display instantaneous flow and cumulative flow, pointer type, flange connection.

(Made of pure mechanical pointer type cast iron material)

Main technical parameters
1. Accuracy level: Ordinary type 0.5 level, high-precision 0.2 level
2. Medium pressure: 1.6MPa for ordinary type, 3.2MPa for high-pressure type
3. Viscosity range: Ordinary type: 0.6~200mpa. s, high viscosity: 200~1000mpa. s
4. Medium temperature: ordinary type<120 ℃, high-pressure type<200 ℃
5. Body material: cast iron, cast steel, stainless steel, etc
6. Rotating components: aluminum alloy, stainless steel, etc
7. Intrinsic safety explosion-proof: ExiallAT3
8. Connection method: flange connection DN10~DN100, threaded connection DN10~DN50
9. Installation method; Horizontal and vertical
10. Caliber series: DN10, 15, 20, 25, 40, 50, 80100
11. Pressure loss: ≤ 0.1 MPa

Sample display:

(Pure mechanical pointer type cast iron material with zero return function)

(304 stainless steel material sanitary type with zero return function)

(Internal thread connection, pointer type 304 stainless steel material)

Micro mechanical flowmeter:

The micro flow metal tube float type flow measuring instrument can measure liquids, gases, or vapors. The instrument adopts the principle of variable area measurement, and the measuring components consist of a conical measuring tube and a float. It has the characteristics of robustness, stability, and wide application range.

The connection methods include horizontal or vertical connections, and pressure regulators (constant flow valves) with inlet or outlet pressure changes can also be selected. They are widely used for small flow measurement and process control in industries such as petroleum, chemical, synthetic fiber, steel, food, light industry, and pharmaceuticals.

Flow range:

Maintenance and upkeep of glass windows

1. The glass window is used to observe the flow reactions of liquids, gases, vapors, and other media, and should be kept clean and dust-free.

2. Window glass is a vulnerable component, so be careful when installing mirrors.

3. Glass has certain limitations in temperature and pressure resistance, which depend on the actual situation.

The following provide physical experimental parameters for the national standard glass manufacturing process:

Temperature resistance: tempered borosilicate glass ≤ 200 ℃, quartz glass ≤ 1000 ℃, aluminum silicon glass ≤ 450 ℃

Pressure resistance: Tempered borosilicate glass sheet ≤ 2.5MPa, quartz glass sheet ≤ 10.0MPa, aluminum silicate glass ≤ 6.4MPa

4. Allowing sudden temperature changes below 60 ℃, glass may rupture due to excessive temperature difference.