Advanced Specialty Gas Equipment

VARIABLE AREA FLOWMETERS
Series 50 and 50K

65 MM, Direct Reading, Flowmeters

Series 50 FlowmeterSeries 50 flowmeters offer an economical means of measuring gas or liquid flow at low pressures where ± 10% accuracy is acceptable. They are suitable for plant and general laboratory applications. These flowmeters are direct reading for air; however, approximate flow ranges for other gases are listed in the Tube Selection.

Standard Features
  • Ribbed Tubes stabilize float and improve accuracy and readability.
  • Borosilicate Glass Tubes allow operating temperatures up to 250°F (100°F for Series 50K).
  • Threaded Fittings with Locking Nuts (Standard on Series 50) permit front panel mounting.*
  • Unique Valve Design allows bubble-tight shutoff.
  • Availability of Aluminum, Stainless Steel or Kynar® Construction provides a wide material selection for maximum gas compatibility.
Optional Features
  • Baseplate with Leveling Screws permits bench use.
  • Aluminum Bezel permits flush panel mounting.
  • Inlet Filter traps foreign matter, extends flowmeter life and reduces maintenance.
* Series 50K Flowmeters may be front panel mounted using predrilled holes on rear of flowmeter and self-tapping screws.

Specifications
Maximum Operating Pressure and Temperature:
  50: 200 psig at 250°F
  50K: 150 psig at 100°F

Minimum Operating Temperature: 32°F

Accuracy: ± 10% of full scale from 10%
   to 100% of range

Repeatability: Within 0.5% of full scale

Tube Graduations: Standard cubic
  centimeters per minute or standard
  liters per minute of Air depending
   upon range.

Scale Length: 65 mm

Inlet and Outlet Connections:
  50: 1/8" NPT female
  50K: 1/4" NPT female

Approximate Weight: 0.75 lb

FM 4711 Optional Panel Mounting BezelMaterials of Construction
Tubes: Borosilicate Glass with float
   stops of PTFE
Floats: Borosilicate Glass, Type 316
  Stainless Steel or Carboloy
   as specified
End Blocks
Inlet/Outlet Adaptors
Side Plates: Aluminum
Back Plate: White Plastic
Front Plate: Clear Plastic
Seals and Packing: Viton®
   (other materials  available on
   special order)
Valve: Type 316 Stainless Steel

 

 

 

Optional Equipment

Equipment Part No.
Baseplate FM4702
Inlet Filter, 2 micron  
  Aluminum FM4741
  Type 316 Stainless Steel (Series 50) FM4746
  Type 316 Stainless Steel (Series 50K) SG6113
Aluminum Bezel for Flush Panel Mounting FM4711
Replacement Metering Valves  
  Flowmeters with Tube Numbers FM4340 – FM4344 0202-4113 (L)
  Flowmeters with Tube Numbers FM4345 – FM4346 0202-4114 (M)
  Flowmeters with Tube Numbers FM4347 – FM4349  0202-4115 (H)
Replacement Tubes 
 

 

Table I
Series Part No. End Blocks Material Inlet/Outlet
Adaptor Material
50 FM4350-( ) Aluminum Aluminum
50 FM4360-( ) Type 316 Stn. Stl. Type 316 Stn. Stl.
50K FM4451-( ) Kynar® None
Where "( )" is indicated above, complete the part number by inserting applicable tube number from Tube Selection
Table below. Example: FM4350-5. Order by complete part number.

Tube selection tables for series 50 and 50K Flowmeters
Flow rates shown are at 70°F and 14.7 psia.

Tube No. Float Material Air
(Actual Graduations)
Argon*
(Approx. Range)
Carbon Dioxide*
(Approx. Range)
Helium*
(Approx. Range)
0 Glass 8.0–50 sccm 8.0–50 sccm 8.0–50 sccm 4.7–47 sccm
1 Glass 5.0–85 sccm 7.1–71 sccm 10.4–104 sccm 7.9–79 sccm
2 Glass 40–440 sccm 38–375 sccm 36–355 sccm 52–513 sccm
3 316 Stn. Stl. 100–950 sccm 81–808 sccm 77–767 sccm 0.15–1.5 slpm
4 Glass 0.2–1.8 slpm 0.15–1.5 slpm 0.16–1.6 slpm 0.38–3.8 slpm
5 316 Stn. Stl. 0.4–3.6 slpm 0.31–3.1 slpm 0.32–3.2 slpm 0.78–7.8 slpm
6 Glass 0.5–7 slpm 0.6–5.9 slpm 0.6–5.9 slpm 1.55–15.5 slpm
7 316 Stn. Stl. 1.0–13 slpm 1.1–11.1 slpm 1.1–10.9 slpm 3.1–30.6 slpm
8 316 Stn. Stl. 6.0–24 slpm 2.1–20.5 slpm 2.0–20.1 slpm 5.7–56.4 slpm
9 Carboloy 4.0–44 slpm 3.8–37.4 slpm 3.6–36.3 slpm 10.4–103 slpm

 

Tube No. Hydrogen*
(Approx. Range)
Nitrogen*
(Approx. Range)
Oxygen*
(Approx. Range)
0 10.5–105 sccm 5.1–51 sccm 4.5–45 sccm
1 17.8–178 sccm 8.7–87 sccm 9.3–93 sccm
2 0.1–1.1 slpm 45–449 sccm 41–411 sccm
3 0.3–2.8 slpm 97–969 sccm 88–884 sccm
4 0.6–6.0 slpm 0.2–1.8 slpm 0.2–1.7 slpm
5 1.2–12.0 slpm 0.4–3.7 slpm 0.3–3.4 slpm
6 2.4–23.8 slpm 0.7–7.1 slpm 0.8–8.2 slpm
7 4.6–45.8 slpm 1.4–13.2 slpm 1.6–15.5 slpm
8 8.5–84.5 slpm 2.5–24.5 slpm 2.9–28.7 slpm
9 15.5–155 slpm 4.5–44.9 slpm 5.3–52.4 slpm
* Series 50 flow tubes are directly calibrated for air at 70°F and 14.7 psia. Flow rates shown for other gases are for reference purposes only. Flow capacities for gases not listed may be obtained by contacting your Advanced Representative.

 

Replacement Tubes
and Packing Part No.
FM4340 Replacement Tubes and Packing Parts
FM4341
FM4342
FM4343
FM4344
FM4345
FM4346
FM4347
FM4348
FM4349