©2015 John Sherman Agencies Ltd.
Range Codes
VFB Series
for Water
Range
Code
US Gal/hr. Water
0.5-12
80
6-60
81
1-20
83
6-40
84
US GPH & l/m Water
0.5-12/0.04-0.74
80D
1-20/0.1-1.3
83D
10-100/0.5-6.5
94D
US GPM Water
0.2-2
85
0.6-5
86
cc/min (ml/m) Water
2-30
82
VFC Series
for Air
Range
Code
SCFM Air
4-25
121
5-50
122
10-100
123
l/m Air
100-700
131
200-1400
132
300-2800
133
VFC Series
for Water
Range
Code
US GPM Water
0.5-5
141
1-10
142
2-20
143
l/m Water
2-20
151
4-40
152
10-75
153
VFA/VFB Flowmeter Dimensions
click image to enlarge
•
Precision machined from solid acrylic
•
Used to indicate or manually control air or gas flow from .1 SCFH to 100 SCFM or water
flow from .6 GPH to 20 GPM
Dwyer Visi-Float flowmeter bodies are cut and precision machined from solid, clear acrylic plastic blocks.
This contruction not only produces a handsome finished product, but permits complete visual inspection. As a
result, the Dwyer Visi-Float flowmeters are espcially popular for medical and laboratory equipment
applications.
Scales are easy to read - The front scale location and white background provides excellent visibility. The
direct reading scales are hot stamped into the plastic and will not wear off. Mid-range calibration is
established with a master flowmeter. Accuracy is +/-5% of full scale for VFA models, +/-3% for VFB, and +/-
2% for VFC. Scales average 2" long on the VFA models, 4" long on the VFB and 5" long on VFC.
Durable and attractive construction - The machined acrylic bodies of the Dwyer Visi-Float flowmeters are
practically unbreakable. Fabrication is backed by over 60 years of experience in acrylic instrument machining.
The tapered bore is precision machined to a smooth surface that provides perfect visibility of the indicating
float. The VFA and VFB models are available with either brass or stainless steel inlet and outlet connections
and are tapped for 1/8"NPT thread. VFB models 85 and 86 have either 1/4" back or 3/8" end connections.
The VFC models have PVC 1" NPT female connections and VFCII units are equipped with acetal
thermoplastic 1"NPT male fittings. VFCII fittings also include hex wrench flats to prevent stripped threads.
Precision metering valves in brass or stainless steel are available for most VFA and VFB models. VFC
models, intended for use with external metering valves, include a stainless steel guide rod and large diameter
float for excellent stability and visibility at higher flow rates. Two options are offered for VFCII units,
specifically designed for applications requiring FDA approved materials. Choose 316 stainless steel float and
guide rod and Viton® "O" rings.
Easy installation - All Visi-Float flowmeters have metal mounting inserts on read for panel mounting. They
can also be supported directly by system piping.
Viton® is a registered trademark of DuPont Dow Elastomers
VFA
2”
Scale
VFB
4” Scale
VFC
5” Scale
VFC Options
-EC End Connections
-VIT Flouroelastomer
O-Rings
VFB Options
-BV
Brass Valve
-SSV
Stainless Steel Valve
-NIST
NIST Traceable Calibration Certificate
-PF
Pointer Flag
-SPCL
Special Cleaning (must add -VIT option)
-SS
Stainless Steel wetted parts (no valve)
-VIT
Fluoroelastomer O-Rings
-PTFE
PTFE Valve Seat (for Oxygen/Ozone
applications)
VFA Options
-BV
Brass Valve
-SSV
Stainless Steel Valve
-NIST
NIST Traceable Calibration
Certificate
-PF
Pointer Flag
-SPCL
Special Cleaning (must add -VIT
option)
-SS
Stainless Steel wetted parts (no
valve)
-VIT
Fluoroelastomer O-Rings
-PTFE
PTFE Valve Seat (for Oxygen/Ozone
applications)
VFC/VFCII Flowmeter Dimensions
click image to enlarge
VFA with
Valve
VFB with
Valve
VFC with
End
Connections
Specifications
Meter Body
Acrylic plastic. Metering tube machined into body
Wetted Metal Parts
VFA & VFB: Brass Standard; Stainless Steel Optional
VFC: Stainless Steel Standard
Floats
Stainless Steel, Black Glass, Aluminum, K Monel (depends upon range)
Float Stops
Stainless Steel Springs
Pipe Connections
VFA: 1/8" FNPT
VFB: 1/8" FNPT*
*VFB 85 & 86: 1/4" Back or 3/8" End Connections
VFC: 1" FNPT
VFCII: 1" MNPT
"O" Rings
Buna-N
Mounting Inserts
10-32x1/4" deep
Scale
Hot Pressed into acrylic body
Knobs
ABS Plastic
Maximum Pressures
VFA & VFB without valve: 100 PSIG (690 kPa)@150°F (85°C)
and Temperatures
150 PSIG (1000 kPa) @ 100°F (38°C)
VFA & VFB with valve: 100 PSIG (690 kPa) @ 150°F (85°C);
VFC: 100 PSIG (690 kPa) @ 120°F (48°C)
Accuracy
VFA: ±5% of full scale
VFB: ±3% of full scale
VFC: ±2% of full scale