Dwyer Instruments SERIES VF Catalog Page

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SERIES VF

VISI-FLOAT® ACRYLIC FLOWMETERS

FLOW

Hot-Stamped Scales, Multi-Angle Views of Flow

Model VFB Model VFA-SSV

DIMENSIONS - FLOWMETER

Model VFA Model VFB

4 [101.6]

3 [76.20]; 1/8 NPT conn.

1-5/8 [41.28]; 10-32 thd

1/2 [12.70]

1-3/16 [30.16]

1-1/4 [31.75]

2-1/16 [52.39]; Open

4-3/32 [104.0]

1 [25.40]

7/8 [22.23] ; 1/8 NPT

3/32 [2.381]

6-1/2 [165.1] 5-1/2 [139.7]; 1/8 NPT conn. 3-1/2 [88.90]; 10-32 thd 1/2 [12.70] 1-1/2 [38.10] 1-1/4 [31.75] 2-1/16 [52.39] ; Open 6-11/16 [169.9] 1-3/8 [34.93] 7/8 [22.23]; 1/8 NPT 3/32 [2.381]

The Series VF Visi-Float® Acrylic Flowmeters are a line of direct reading, precision

machined, clear acrylic body owmeters suitable for both gas and liquid applications.

The fabrication of the Visi-Float® Flowmeters is backed by over 60 years of experience

in acrylic instrument machining. This Series consists of 2˝ (51 mm) and 4˝ (102 mm)

scales with optional precision metering valves.

FEATURES/BENEFITS

• Bodies are cut and precision machined from solid, clear acrylic blocks allowing for complete visual inspection

• White background allows for better visibility of the oat increasing reading accuracy

• Direct reading scales are hot stamped into the plastic eliminating the need for

troublesome conversions and increasing product operating life

• Precision machined tapered bore enables high repeatability

• Low installation costs with back or end connection options with metal mounting inserts that can be supported directly by system piping

APPLICATIONS

• Medical equipment

• Laboratory equipment

• Air samplers

• Gas analyzers

• Pollution monitors

• Chemical injectors

• Cabinet purging

MODEL CHART Model Description VFA-X

VFA-X-SS VFA-X-BV+

Flowmeters,

VFA-X-SSV+ VFA-X-EC

Variable Area & In-Line

VFA-X-EC-SS

VFB-X VFB-X-SS VFB-X-BV+ VFB-X-SSV+ VFB-X-EC VFB-X-EC-SS

How To Order: Series—Range No. (“X”)—Valve—Option Example: VFA-9-BV

(Series VFA with 20-200 SCFH air range & brass valve) +Valve is designed for ow adjustment only, not intended to

be used as an open/shut-off valve.

Standard VFA

VFA with stainless metal wetted parts VFA with brass valve VFA with stainless steel valve VFA with end connections VFA with end connections and stainless steel metal wetted parts

Standard VFB

VFB with stainless metal wetted parts VFB with brass valve VFB with stainless steel valve VFB with end connections VFB with end connections and stainless steel metal wetted parts

OPTIONS To order add sufx: Description

-NIST

-PF

-VIT

NIST traceable calibration certicate Red ABS plastic pointer ag Fluoroelastomer O-rings

ACCESSORIES Model Description RKA

RK-VFB

Regulator kit for Series VFA Regulator kit for Series VFB

SPECIFICATIONS Service: Compatible gases & liquids.

Wetted Materials: Body: Acrylic

plastic; O-ring: Buna-N (uoroelastomer available); Metal parts: Nickel plated brass standard, SS optional; Float: SS, 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 FS; VFB = 3% of FS.

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 to 4.8 oz (.11 to .14 kg); VFB: 7.2 to 8.8 oz (.20 to .25 kg).

Agency Approvals: Meets the technical

requirements of EU Directive 2011/65/ EU (RoHS II).

RANGE CHART - VFA 2˝ SCALE - POPULAR RANGES

Range No. SCFH Air Range No. LPM Air

1 2 3 4 5 6 7 8 9

.1 to 1 .2 to 2 .6 to 5 1 to 10 2 to 20 4 to 30 5 to 50 10 to 100 20 to 200

21 22 23 24 25 26 27

.06 to 0.5 .15 to 1 .6 to 5 1 to 10 3 to 25 6 to 50 10 to 100

Range No. CC/Min. Water Range No. GPH Water

32 33 34

6 to 50 10 to 100 20 to 200

41 42 43 44

.6 to 5 2 to 10 3 to 20 8 to 40

RANGE CHART - VFB 4˝ SCALE - POPULAR RANGES

Range No. SCFH Air Range No. LPM Air

50 91* 51* 52 53* 54* 55*

.3 to 3 1 to 10 2 to 20 4 to 40 10 to 100 10 to 150 20 to 200

65 66 67 68 69

.2 to 4 1 to 10 1 to 20 3 to 30 4 to 40

Range No. CC/Min. Water

82 2 to 30

Range No. SCFM Air Range No. GPH Water

90 .3 to 3 80*

Range No. CC/Min. Air

60 100 to 1000

83* 84 81

.5 to 12 1 to 20 6 to 40 6 to 60

Range No. GPM Water

85 86

.2 to 2 .6 to 5

*For dual range models in English and Metric add “D” to end of Range No.

OEM specials

Special owmeter designs can be supplied to meet a wide range of requirements and specic applications. These include: on-off plunger and push-to-test valves, special gas or uid calibration, special ranges, scales, name brand or other identication. Pointer ags can be furnished for instant visual reference. For specic information, please supply an outline of your requirements.

DWYER INSTRUMENTS, INC. | 248

Special multi-column Visi-Float® owmeters

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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