Ex-Proo Gas Roots Flow Meter

• Accuracy: >±1%
• Main Application: Nature Gas
• Size: DN20-DN100
• Model NO.: RFM-50
• Sensor: Tube/Flange
• Application: Energy Metering
• Type: Roots Flow Meter
• Measuring Media: Gas
• Measuring Principle: Electrical Principles
• Certification: ISO
• Origin: China
• Production Capacity: 5000per Year

Product Description

Product description
The HR series gas Roots flowmeter is a volumetric measuring instrument with high precision, strong reliability and wide range. It is mainly used to accurately measure the gas flow in closed pipelines. The flow meter consists of two parts: Roots flow sensor (primary instrument) and gas volume corrector (secondary instrument). The flowmeter can automatically track and compensate the pressure and temperature of the gas being measured, directly display the total gas volume under standard conditions (P=101.325kPa, T=293.15K), and can output a variety of signals. It can be used to measure non-corrosive gases such as natural gas, city gas, propane, air, nitrogen, carbon dioxide, and industrial inert gases. It is widely used in gas commercial settlement in catering, hotels and other industries, gas transmission and distribution network gas, gas pressure regulation, industrial and civil boiler gas measurement, and can also be used as a standard flow meter. It has now become the first choice product for urban gas measurement.
 

Main features
1.The flow range is wide (greater than 100:1), the initial flow rate is low (less than 0.05m3/h), and the pressure loss is small (less than 350Pa). It is suitable for occasions with large changes in flow load.
2. The measurement accuracy is high, the reliability is strong, and it is not affected by pressure and flow changes.
3. High-precision machining and repeated positioning technology ensure good versatility and interchangeability between parts, making the flow meter have good repeatability and long working life.
4. The flowmeter does not require straight pipe sections before and after, and can be installed in narrow spaces.
5. Can be used with IC card prepayment system.
6. Ultra-low power consumption, powered by two 2#3.6V lithium batteries, which can run continuously for more than five years.
7. Access to the remote centralized reading system through the communication bus to achieve real-time data collection and management.
8. User password setting, power-off protection function.
Product execution standards

a.Execute JJG633-2005 "Gas Volumetric Flowmeter" calibration procedures;
b. Execute Q/HDYB003-2016 "Gas Roots Flowmeter" enterprise standard;
c. Comply with 0IMLR6 international standards and JB/T 7385-94 "Gas Lumbar Flow Meter" industry standard;
d.Comply with GB/T28848-2012 "Smart Gas Flow Meter" national standard.
e.Product type  test certification number PAC measuring machine No. 1358, production equipment license number (10th system No. 00000278).test certification number PAC measuring machine No. 1358, production equipment license number (10th system No. 00000278).
Main technical parameters

Nominal diameter DN/ mm(inch)	Model specifications	Flow range m³/h	Start flow m³/h	Lubrication method		Maximum pressure loss △ pmax / Pa	scope
				Refueling from one side	Cheer on both sides
20(0.8)	HR-20	0.2~10	0.03	-	-	25	50:1
		0.4~16	0.03	-	-	60	40:1
25 (1)	HR-25	0.5~16	0.05	Δ		60	32:1
		0.5~25	0.05	△		60	50:1
40(1.5~)	HR-40	1~25	0.06	△		6	25:1
		1~40	0.06	△		15	40:1
		1~65	0.07	△		40	65:1
50 (2)	HR-50	1~40	0.06	△		15	40:1
		1~65	0.06	△		40	65:1
		1~100	0.10	△		180	100:1
80 (3~)	HR-80	1.5~160	0.10	△		200	107:1
		2~250	0.15	△	△	250	125:1
100 (4)	HR-100	2~250	0.20	△	△	250	125:1
		3~400	0.30	△	△	300	133:1