Instruction Manual
Series GD Direct Read Glass Tube Flowmeters Series GD Direct Read Glass Tube Flowmeters
KEY INSTRUMENTS • 250 Andrews Road • Trevose, PA 19053 • 800.356.7483 • 215.357.0893 • Fax: 215.357.9239
www.KeyInstruments.com • sales@keyinstruments.com
65 MM FLOWMETERS - AIR
Model No. Float Float Dia. ml/min LPM LPH CCM SCFH
GD60110 G 1/8" 2 - 50 .004 - .1
GD60130 ST 1/8" 1 - 150
GD60210 G 1/8" 5 - 100
GD60230 ST 1/8" 10 - 300
GD60310 G 1/8" 20 - 40
GD60320 S 1/8" 25 - 550 .05 - .5 25 - 550 .1 - 1.2
GD60410 G 1/8" 20 - 900 .05 - 1.9
GD60420 S 1/8" .1 - 1 50 - 1200
GD60430 ST 1/8" 50 - 1800
GD60510 G 3/16" .1 - 2.5 250 - 2500 .25 - 5.5
GD60540 C 3/16" 350 - 7300
GD60710 G 1/4" 200 - 6000
GD60730 ST 1/4" .2 - 11.4
GD60820 S 1/4" 2 - 25
GD60830 ST 1/4" 4 - 40
GD60920 S 1/4" 1 - 20
GD60930 ST 1/4" 1 - 30 4 - 60
GD61040 C 1/4" 2 - 60 5 - 130
150 MM FLOWMETERS - AIR
Model No. Float Float Dia. ml/min LPM LPH CCM SCFH
GD10110 G 1/8" 2 - 50
GD10210 G 1/8" 2 - 100 2 - 100 2 - 100
GD10220 S 1/8" 4 - 160 4 - 160
GD10230 ST 1/8" .01 - .25 5 - 300
GD10310 G 1/8" 20 - 400
GD10320 S 1/8" 20 - 400 20 - 550
GD10330 ST 1/8" 30 - 850 .06 - 1.3
GD10420 S 1/8" .1 - 1 50 - 1100 .05 - 2.4
GD10430 ST 1/8" .25 - 1.7 10 -100
GD10520 S 3/16" .05 - 3 50 - 3000 .1 - 6
GD10530 ST 3/16" 100 - 4500
GD10560 G 3/16" .05 - 2.5
GD10630 ST 3/16" .1 - 6.6
GD10720 S 3/16" .2 - 12
GD10760 G 1/4" .25 - 10
GD10820 S 1/4" 1 - 30
GD10830 ST 1/4" 1 - 40
GD10840 C 1/4" 1 - 50
GD10850 T 1/4" 2000 - 66,000
Catalog Number Ordering Example: GD60110ACSVV
EXAMPLE: GD 60110 A C S V V
Glass Flowmeter
Product Code
Model Number
Gas or Liquid
(See Table)
Units of Measure
(See Table)
End Blocks Material (Wetted)
A = Aluminum, S = Stainless Steel
Valve Designation
N = No Valve, V = Standard Inlet Valve, P = Precision Inlet Valve
O-Ring Material Used in Valve
B = Buna, V = Viton
®
, S = Special
ORDERING INFORMATION
Gas or Liquid
A = Air
R = Argon
C = Carbon Dioxide
H = Helium
Units of Measure
M = ml/min
L = LPM
H = LPH
C = CCM
F = SCFH
P = GPM
G = GPH
Helpful Conversions:
For Gas: For Liquid:
LPM x 1000 = CCM LPM x 1000 = CCM
CFH x 472 = CCM GPH x 63.09 = CCM
CFM x 28230 = CCM GPM x 3785 = CCM
For Pressure: For Temperature:
ATM x 14.696 = PSI ºC = (ºF-32) x 0.555
ATM x 101.325 = KPA ºF = (1.8 x ºC) + 32
ATM x 29.92 = IN of Hg ºK = ºC + 273.15
5
1
2
2
1
13
32
11
32
4
1
2
1
4
1
9
2
1
13
16
13
32
11
32
13
16
1
4
8
1
1
2
1
2
9/16-18 Threaded For
Panel Nuts (Provided)
2 Places
65 MM FLOWMETER
Inches 5
1
∕
2
1
13
∕
32
2
11
∕
32
1
1
∕
4
4
1
∕
2
1
∕
2
MM 140 35.7 59.5 31.8 114 12.7
150 MM FLOWMETER
Inches 9
13
∕
16
1
13
∕
32
2
11
∕
32
1
1
∕
4
8
13
∕
16
1
∕
2
MM 249 35.7 59.5 31.8 224 12.7
5
1
2
2
1
13
32
11
32
4
1
2
1
4
1
9
2
1
13
16
13
32
11
32
13
16
1
4
8
1
1
2
1
2
9/16-18 Threaded For
Panel Nuts (Provided)
2 Places
Non-Rotating Fitting
1/8 FNPT 2 Places
5
1
2
2
1
13
32
11
32
4
1
2
1
4
1
9
2
1
13
16
13
32
11
32
13
16
1
4
8
1
1
2
1
2
Non-Rotating Fitting
1/8 FNPT 2 Places
5
1
2
2
1
13
32
11
32
4
1
2
1
4
1
9
2
1
13
16
13
32
11
32
13
16
1
4
8
1
1
2
1
2
KEY INSTRUMENTS • 250 Andrews Road • Trevose, PA 19053 • 800.356.7483 • 215.357.0893 • Fax: 215.357.9239
www.KeyInstruments.com • sales@keyinstruments.com
FEATURES
Standard direct read scales
Scale length (approximate): 65 mm, 150 mm
Flowmeter available with:
No Valve
Cartridge Valve
Precision Control Valve
Inlet valve standard / Outlet valve available
E-Z CHANGE design allows quick interchangeability of tube
assemblies
Glass tube allows compatibility with most gases and fluids
Rotating lens allows 180º view with magnification
MAXIMUM RANGES AVAILABLE
Turndown ≥ 10:1
65 MM Tubes See Table @ STP
150 MM Tubes See Table @ STP
SPECIFICATIONS
Accuracy 65 mm Scale ± 5% Full Scale
150 mm Scale ± 3% Full Scale
Floats Black Glass, Sapphire, Stainless
Steel, Carboloy or Tantalum
Frame Aluminum
End Blocks Aluminum w/ Buna N
Stainless Steel w/ Viton
®
Standard Seals & Fittings Brass w/ Buna N
Stainless Steel w/ Viton
®
Fittings 1/8" FNPT
Tube Borosilicate Glass
Valve Standard Control Valve
Precision Control Valve
Pressure 200 psi / 13.8 Bar Max.
Temperature 200°F / 93°C Max.
65 MM FLOWMETERS - OXYGEN
Model No. Float Float Dia. ml/min CCM LPM
GD60230 ST 1/8" 10 - 260
150 MM FLOWMETERS - OXYGEN
Model No. Float Float Dia. ml/min CCM LPM
GD10110 G 1/8" 2 - 50
GD10230 ST 1/8" 0.01 - 0.25
GD10420 S 1/8" .02 - 1
GD10540 C 3/16" 0.5 - 5
GD10560 G 3/16" 0.05 - 2.5
GD10760 G 1/4" 0.25 - 10
GD10810 G 1/4" 0.5 - 22
GD10820 S 1/4" 1 - 30
GD10830 ST 1/4" 1 - 40
GD10840 C 1/4" 1 - 50
DESCRIPTION
Series GD is a direct read flowmeter for liquids or gases
available in either 65 or 150 mm scale lengths. Series GD
flowmeters can be configured with a standard or precision
control valve on either the inlet or no valve at all; fittings
can be specified in either aluminum or stainless steel; valves
can be specified in either brass or stainless steel; O-rings
and seals can be provided in Buna-N, Viton
®
or other
optional elastomers.
Y = Hydrogen
N = Nitrogen
O = Oxygen
W = Water