Fluid Components Intl ST51A - Specifications

ST51A/ST75A/ST75AV Mass Flow Meters GENERAL
Fluid Components International LLC 3
Specifications
Instrument
■ Media Compatibility
ST51A: Air, compressed air, nitrogen, biogas, digester gas,
methane, natural gas
ST75A/ST75AV: Air, compressed air, nitrogen, oxygen, argon,
CO2, other inert gases, natural gas and other gases as identified
in the Order Information Sheet (OIS)
■ Pipe/Line Size Compatibility
ST51A: 2″ to 24″ [51 mm to 610 mm]
ST75A/ST75AV: ¼″ to 2″ [6 mm to 51 mm]
■ ST51A Flow Range
0.3 SFPS to 400 SFPS [0.08 MPS to 122 MPS]
■ ST75A/ST75AV Flow Range*
NPT Line
Size
¼" ½" ¾" 1" 1 ½" 2"
Min SCFM
0.04
0.13
0.22
0.35
0.85
1.40
Min [NCMH]
[0.07]
[0.22]
[0.38]
[0.59]
[1.44]
[2.38]
Max SCFM
17.34
50.64
88.88
139.95
539.31
559.27
Max [NCMH]
[29.47]
[86.04]
[151.00]
[237.78]
[576.48]
[950.20]
Tubing Line Size
¼"
½"
1"
Min SCFM
0.01
0.05
0.25
Min [NCMH]
[0.01]
[0.09]
[0.42]
Max SCFM
3.02
21.15
99.08
Max NCMH
[5.14]
[35.94]
[168.33]
* Range subject to gas type and conditions
■ Accuracy
ST51A/ST75A: Standard: ±2% reading ±0.5% full scale
Optional: ±1% reading ±0.5% full scale
ST75AV: ±1% reading ±0.5% full scale
■ Repeatability
±0.5% of reading
■ Temperature Compensation
Standard: 40 to 100 °F [4 to 38 °C]
Optional: 0 to 250 °F [-18 to 121 °C]
■ Turndown Ratio
3:1 to 100:1
■ Agency Approvals
CE Mark
Directive 2014/34/EU ATEX
IECEx Scheme
ATEX/IECEx: II 2 G Ex db IIC T6...T1 Gb
II 2 D Ex tb IIIC T85°C...T300°C Db; IP66/IP67
Ta = -40°C to +65°C
FM, FMc: Class I, Div 1, Groups B, C, D
Class I, Div 2, Groups A, B, C, D
Class II/III Div 1, Groups E, F, G
Type 4X, IP66
Directive 2014/30/EU Electromagnetic Compatibility EMC
Directive 2014/35/EU Low Voltage
Directive 2011/65/EU RoHS 2
FM, FMc
Explosion-proof: Class I, Div. 1, Groups B, C, D
Dust-ignitionproof: Class II/III, Div. 1, Groups E, F, G; Type 4X; IP66
Nonincendive: Class I, Div. 2, Groups A, B, C, D
SIL 1 compliant; Safe Failure Fraction (SFF) 78.5% to 81.1%
CRN No.: 0F0303
Contact FCI for other approvals and conditions of use.
■ Warranty
2 years
Flow Element
■ Type
Thermal dispersion
■ Material of Construction
ST51A: 316L stainless steel body with Hastelloy-C22 thermowells; 316
stainless steel compression fitting with Teflon or stainless steel ferrule.
ST75A/ST75AV: All-welded 316 stainless steel probe element with
Hastelloy-C22 thermowells; 316 stainless steel NPT, flange and
tube fittings.
■ Process Connection
ST51A: ½″ Male NPT or ¾″ Male NPT compression fitting with
stainless steel or Teflon ferrule
Insertion Length:
1″ to 6″ [25 mm to 152 mm]
1″ to 12″ [25 mm to 305 mm]
1″ to 18″ [25 mm to 457 mm]
ST75A: T-fitting [Female NPT]: ¼″, ½″, ¾″, 1″, 1-½″ or 2″
Tubing: ¼″, ½″, 1″
ST75AV: Female NPT, Male NPT
Flange: ¼″, ½″, ¾″, 1″, 1-½″ or 2″
■ Maximum Operating Pressure
ST51A stainless steel ferrule: 500 PSIG [34 bar(g)]
Teflon ferrule: 150 PSIG [10 bar(g)]
ST75A: T-fitting [Female NPT]: 240 PSIG [16.5 bar(g)]
Tube: 600 PSIG [41 bar(g)]
ST75AV: 600 PSIG [41 bar(g)]
■ Flow Element Temp Range
ST51A
stainless s
teel ferrule: 0 °F to 350 °F [-18 °C to 177 °C]
ST75A: 0 °F to 250 °F [-18 °C to 121 °C]
Teflon ferrule: 0 °F to 200 °F [-18 °C to 93 °C]