Overview: ZXQL-B Gas waist wheel (Roots) flowmeter has a history of more than 100 years as a volumetric measuring instrument. With its high accuracy, wide range, small size, light weight, easy installation and maintenance, reliable use, and durable service life, it is widely used for flow measurement of natural gas, coal to gas, inert gas, air and other gases. It is an ideal flow measurement device for urban gas, oilfield chemical industry, scientific research and other departments at home and abroad. Adhering to the goal of adapting to market demand and pursuing perfect quality, we strive to explore and continuously improve. Our product components use machining centers, CNC lathes, precision grinders, dynamic balancing machines, and precision inspection equipment, as well as American Type 5 calibrators and 1600m3 large automatic detection devices. With precision equipment, reasonable processes, and strict inspections, we ensure the quality and interchangeability of each part, while also ensuring the consistency of the finished product's surface quality.

Working Principle:

Gas waist wheel (Roots) flowmeter is mainly composed of components such as housing, conjugate rotor, and counting device.

A pair of conjugate rotors installed in the measuring room, under the action of the pressure difference (P in>P out) at the inlet and outlet of the circulating gas,

By precision machining and adjusting gears, the rotor is kept in the correct relative position. Continuous non-contact sealing is achieved by maintaining working clearances between rotors, rotors and shells, and rotors and wall panels. For every revolution of the rotor, four times the effective volume of the measuring chamber gas is output. The number of revolutions of the rotor is transmitted to the accumulator indicator counter through a magnetic sealed coupling device and a reduction mechanism, thereby displaying the cumulative volume of the output gas,

Features:

1. Large circulation capacity, low pressure loss, high accuracy, wide range of measurement, etc.

2. The rotor and housing have undergone special surface treatment, resulting in high hardness and preventing them from easily getting stuck on the meter.

3. Strict dynamic balance testing to ensure the stability and service life of the product.

4.  With diameters of 32mm to 250mm. Through technical processes and management improvements, the caliber is small, the flow rate is large, and the starting flow rate is

Higher than its peers, it provides cost-effective products for a wide range of users.

5.5. The pulse transmitter is directly installed on the counter and outputs a low-frequency pulse signal of the entire cubic meter. It can be used in conjunction with an IC card controller or for remote transmission output.

Technical Specifications

execution standard

JB/T 7385-2015 "Gas waist wheel flowmeter"

Nominal Diameter

DN25、DN32、DN50、DN80、DN100、DN150、DN200

connection method

Flange connection type, threaded connection type

accuracy class

1.5, 1.0

turndown ratio

1:30~1:150

instrument material

Table body: Cast aluminum

Rotor: Aluminum alloy

Converter: Cast aluminum

Terms of Use

Environmental temperature: -20 to+60 ℃; Relative humidity: 5% to 90%;

Medium temperature: -30 to+80 ℃; Atmospheric pressure: 86kPa~106kPa

Protection level

IP65

working power supply

A. External power supply:+24VDC ± 15%, ripple ≤ ± 5%, suitable for 4-20mA output, pulse output, RS485, etc

B. Internal power supply: 2 3.6V10AH lithium batteries.

signal output

Pulse signal, 4~20mA current signal, IC card control signal, alarm signal

communication signal

RS485 communication, etc

real-time recording

Monthly records, diary records, hourly records, event records

signal interface

Internal thread M12 × 1.5 or other, signal wire diameter not exceeding 6mm

Explosion-proof rating

ExdIIBT6 Gb

Selection of flow meters:

1. It is necessary to directly measure the volumetric flow rate of the medium under working conditions, and a flow meter with a mechanical head can be used.

When the pressure is high and the flow rate is large, in order to improve the measurement accuracy, it is necessary to measure the volumetric flow rate of the medium in the standard state, and an intelligent flowmeter can be selected

3. The flow range of the measured medium should be within the measurement range of the selected flowmeter, and the commonly used flow point should be around 70% of the upper limit of the flow rate.

When there are two or more electrical appliances, to prevent excessive flow, the instantaneous flow rate should be the sum of the instantaneous flow rates of all gas appliances multiplied by the load factor.

For more product information, please consult our toll free hotline at +0086 400 880 6367