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Series VFA & VFB Visi-Float® Flowmeters |
| Used to Indicate or Manually Control Air or Water
Flow |
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 Dwyer
Visi–Float® flowmeter bodies are cut and precision
machined from solid, clear acrylic plastic blocks. This construction
not only produces a handsome finished product, but permits complete
visual inspection. As a result, the Dwyer Visi-Float® flowmeters
are especially 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. Scales average 2" long on the VFA models, 4"
long on VFB.
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.
All standard models employ Buna-N o-rings for leak proof operation
and are available with either back or end connections for
horizontal or vertical piping. Precision metering valves in
brass or stainless steel are available for most VFA and VFB
models. See
Dimensions |
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| SPECIFICATIONS |
Service: Compatible gases and liquids.
Wetted Materials:
Body: Acrylic plastic.
O-ring: Buna-N (Viton® available).
Metal Parts: Brass standard, stainless steel optional.
Float: Stainless steel, black glass, aluminum, K Monel depending
on range.
Temperature & Pressure Limits:
Without Valve: 100 psig (6.9 bar) @ 150°F (65°C); 150
psig (10 bar) @ 100°F (38°C).
With Valve: 100 psig (6.9 bar) @ 120°F (48°C).
Accuracy: VFA = 5% of full scale; VFB = 3% of full scale.
Process Connection: 1/8" female NPT. VFB ranges 85 and
86 have 1/4" NPT back connections or 3/8" NPT end
connections. These ranges not available with brass valves.
Scale Length: VFA 2" typical length; VFB 4" typical
length.
Mounting Orientation: Mount in vertical position.
Weight: VFA: 4.0-4.8 oz (.11-.14 kg); VFB: 7.2-8.8 oz (.20-.25
kg). |
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| Easy installation |
| All Visi–Float®
flowmeters have metal mounting inserts on rear for panel mounting.
They can also be supported directly by system piping. |
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| OEM specials |
| Special flowmeter
designs can be supplied to meet a wide range of requirements
and specific applications. These include: on-off plunger and
push-to-test valves, special gas or fluid calibration, special
ranges, scales, name brand or other identification. Pointer
flags can be furnished for instant visual reference. For specific
information, please supply an outline of your requirements. |
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| Special Multi-Column Visi-Float Flowmeters |
| Perfect for OEM applications, Visi-Float flowmeters
can be custom made with up to 10 columns in a single block of
acrylic plastic. Available with or without valves. Consult factory
for more information. |
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| How To Order |
1. Series -- Range No. -- Valve -- Option
EXAMPLE: VFA-9-BV
Series VFA with 20-200 SCFH Air Range & Brass Valve. |
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| Model VFA - 2" Scale |
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Model VFB
- 4 " Scale |
| Model
Number |
Range |
| VFA-1 |
.1-1 SCFH Air |
| VFA-2 |
.2-2 SCFH Air |
| VFA-3 |
.6-5 SCFH Air |
| VFA-4 |
1-10 SCFH Air |
| VFA-5 |
2-20 SCFH Air |
| VFA-6 |
4-30 SCFH Air |
| VFA-7 |
5-50 SCFH Air |
| VFA-8 |
10-100 SCFH Air |
| VFA-9 |
20-200 SCFH Air |
| VFA-21 |
.06-0.5 LPM Air |
| VFA-22 |
.15-1 LPM Air |
| VFA-23 |
.6-5 LPM Air |
| VFA-24 |
1-10 LPM Air |
| VFA-25 |
3-25 LPM Air |
| VFA-26 |
6-50 LPM Air |
| VFA-27 |
10-100 LPM Air |
| VFA-32 |
6-50 CC Water per min. |
| VFA-33 |
10-100 CC Water per min. |
| VFA-34 |
20-200 CC Water per min. |
| VFA-41 |
.6-5 Gal. Water per hour |
| VFA-42 |
2-10 Gal. Water per hour |
| VFA-43 |
3-20 Gal. Water per hour |
| VFA-44 |
8-40 Gal. Water per hour |
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| Model
Number |
Range |
| VFB-50 |
.3-3 SCFH Air |
| VFB-91 |
1-10 SCFH Air |
| VFB-51 |
2-20 SCFH Air |
| VFB-52 |
4-40 SCFH Air |
| VFB-53 |
10-100 SCFH Air |
| VFB-54 |
15-150 SCFH Air |
| VFB-55 |
20-200 SCFH Air |
| VFB-90 |
.3-3 SCFM Air |
| VFB-60 |
100-1000 CC/Min. Air |
| VFB-65 |
.2-4 LPM Air |
| VFB-66 |
1-10 LPM Air |
| VFB-67 |
1-20 LPM Air |
| VFB-68 |
3-30 LPM Air |
| VFB-69 |
4-40 LPM Air |
| VFB-82 |
2-30 CC/Min. Water |
| VFB-80 |
.5-12 GPH Water |
| VFB-83 |
1-20 GPH Water |
| VFB-81 |
6-60 GPH Water |
| VFB-85 |
.2-2 GPM Water |
| VFB-86 |
.5-5 GPM Water |
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| VFA
Series Model
Numbers |
| Model |
Description |
| VFA-X |
Standard
VFA |
| VFA-X-SS |
VFA
with SS Metal Wetted
Parts |
| VFA-X-BV |
VFA
with Brass Valve |
| VFA-X-SSV |
VFA
with SS Valve |
| VFA-X-EC |
VFA
with End Connections
(EC) |
| VFA-X-EC-SS |
VFA
with EC & SS
Metal Wetted Parts |
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| VFB
Series Model
Numbers |
| Model |
Description |
| VFB-X |
Standard
VFB |
| VFB-X-SS |
VFB
with SS Metal Wetted
Parts |
| VFB-X-BV |
VFB
with Brass Valve |
| VFB-X-SSV |
VFB
with SS Valve |
| VFB-X-EC |
VFB
with End Connections
(EC) |
| VFB-X-EC-SS |
VFB
with EC & SS
Metal Wetted Parts |
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| OPTIONS |
-PF Red ABS Plastic Pointer Flag.
-VIT Viton® O-rings. |
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