1.liquid Ammonia flow meter
2.accuracy:1.5%,1.0%,0.5%,
3.material:ss304,ss316L,Carbon steel
4.no moving part,no zero dirft
Port: xiamen air port
Minimum Order Quantity: 1 Piece/Pieces 2 pieces
Supply Ability: 8000 Piece/Pieces per Year 8000 piece/year
Payment Terms: L/C,T/T
Contact SupplierPackaging Detail: 1 piece/carton box
Delivery Detail: 15 days after purchase order
SBL digital target flow meter/ liquid Ammonia flow meter
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
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
CD——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 follow:
In which
Qm, QV----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:
Table 1
Measured media | Liquid Gas Steam | ||||||
Nominal diameter | Pipeline type 15~300mm | Clamped mounting type 15~600mm | Inserted type 100~2000mm | ||||
Nominal pressure | 0.6~42Mpa | 0.6~42Mpa | 0.6~42Mpa | ||||
Media temperature | -20°C~70°C (normal temperature type) -196°C~+450°C (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 digitron) | ||||||
Output forms | Site display reading; 4~20mA (2-wire system); pulse; 0~10V; RS232/RS485 (optional) | ||||||
Material of measurement tube | Carbon steel; 304; 316L; also supplied to user requirement | ||||||
Explosion-proof sign | Intrinsically safe type (ExiallCT4); Explosion isolating type (ExidllCT4) | ||||||
Protection class | IP65; IP67 |