Specifications and Product Details:

Hydrochloride flow meter,measuring instrument,meter

Introduction

Flowmeter,flowmeter

Gas, fluid, steam, water

Anti-interfere, anti-acid, anti-alkaline,anti-impurity

No movable part

Modern sensor

main technical indices
Measured media	Liquid, gas, steam
Nominal diameter	Pipeline type 15~300mm		Clamped mounting type 15~600mm			Inserted type 100~4000mm
Nominal pressure	0~55MPa		0~55MPa			0~55MPa
Media temperature	-20~70^oC (normal temperature type) -196~+700^oC (high/low temperature type)
Accuracy	±0.2%	±0.5%		±1.0%	±1.5%		±2.5%
Range degree	1:10	1:15		1:30	1:100 (gas)		1:15(steam)
Compensation type	Temperature compensation; pressure compensation
Repeatability	0.1%~0.08%
Power supply	Built-in 3.6V Li batter; external power supply of 24VDC; 220VAC (only for separate digital tube)
Output forms	Site display reading; 4~20mA (2-wire system); pulse; 0~10V; RS232/RS485 (optional),HART PROTOCOL
Material	Carbon steel; s.s.304; s.s.316L; also supplied to user requirement
Explosion-proof sign	Intrinsically safe type (ExiallCT4); Explosion isolating type (ExiallBT4)
Protection class	IP65; IP67;IP68

Note: Size of flowmeter flange shall execute GB/T9115.1~9115.4~2000 series standard. For pipeline type, small diameter flowmeter of DN6, DN8, DN10 etc. can be manufactured to user requirements.

Product features:

· accurate measurement of flow of fluid media such as liquid, gas, steam and viscous media etc. under various normal temperature, high temperature and low temperature operating conditions;
· extremely high sensitivity capable of measurement of ultra small flow (minimum flow that can be measured is 0.08m/s;
· no movable part, hence high safety and reliability;
· high measurement accuracy and precision (reaching 0.2% for measurement of total quantity);
· wide measurement range (reaching 1:30);
· good repeatability (normally 0.1~0.08%) and fast measurement;
· small pressure loss, only about 1/2P of standard orifice;
· dry calibration can be used, i.e. poise hanging method;
· target plate can be replaced as required to change flow measurement range;
· capable of online direct reading and remote transmission/signaling;
· easy installation and very easy maintenance.
Anti-interfere, anti-acid, anti-alkaline,anti-impurity

II. Structure and operating principle

1) Structure

SBL flowmeter mainly consists of measurement tube (casing), stress element (target plate), sensing elements (force transducer, pressure transducer and temperature transducer), transition part (adjusted according to temperature and pressure), and accumulation calculation, display and output part. Refer to the following figure for the structure :

2) Operating principle

Refer to Fig.1 for operation schematic of model SBL target flowmeter with digital display. The stress element (target plate) is placed at center of measurement tube (instrument body) coaxially, with rigid connection with transducers. When measured medium flows at certain velocity (m/s), this medium has certain momentum that directly acts on the stress element (target plate). Due to rigid connection between stress element and transducer, the transducer is subject to direct force F generated by fluid momentum. This force is related to flow velocity V, medium density ρ and area of target subject A to force as follows:

In which:

F——force on target plate

C_D——resistance coefficient

P——fluid density, kg/m³

V——fluid velocity, m/s

A——area of target plate subject to force, m²

Through derivation and conversion, the flow is calculated as follows:

In which

Q_m, Q_V-----mass flow and volume flow respectively (kg/h, m³/h)

α----flow coefficient

D----inner diameter of measurement tube, mm

β----diameter ratio, β=d/D

d----target plate diameter, mm

Other symbols are the same before.

Force on target plate is converted to electric signal by the force transducer. This signal is amplified by pre-amplification and processed by AD conversion and computer, to provide corresponding flow and total quantity. Operating principle is shown as follows :