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Visi-Float® Flowmeters- Series VF

For Air, Water or Caustic Fluids. Ranges from 2-22 SCFM, 0.5-50 GPM; from 600 to 6000 PSI

Series VF Series VF

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, and ±2% for VFC. Scales average 2" long on the VFA models, 4" long on 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 l/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. 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. 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. See OPTIONS for ordering codes.

Easy installation - All Visi-Float flowmeters have metal mounting inserts on rear for panel mounting. They can also be supported directly by system piping.

series vf For the OEM product designer, multi-column flow meters can be custom made in an almost infinite variety of combinations. Up to 10 columns can be machined from a single block of acrylic with scale lengths up to 4" long and accuracies to ±3% of full scale. Brass or stainless steel fittings are available. Flow rates can be controlled with metering or on-off valves. Customer logos can be hot stamped on the face of these units in any color. Consult the factory regarding your special requirements.

SPECIFICATIONS

  1. Select series by letter designation, VFA, VFA-EC, VFA-SS, VFA-EC-SS, VFB, VFB-EC, VFB-SS, VFB-EC-SS, VFC, VFC-EC, VFCII, or VFCII-EC
  2. Add ordering number to specify range. Example: VFB-50.
  3. Add sffix BV for brass valve, SSV for stainless steel valve. Example: VFB-50-SSV.
  4. For adjustable pointer flag add -PF. Available only on VFA and VFB. Example: VFB-50-SSV-PF.
  5. For additional options or accessories as required.


Meter Body Acrylic Plastic. Metering tube machined into body
Wetted Metal Parts VFA: Brass std., SS opt.
VFB: Brass std., SS opt.
VFC: SS std.
Floats Stainless Steel, Black Glass, Alum., K Monel
Float Stops Stainles Steel Springs
Pipe Connections Model VFA: ¹/8" NPT
Model VFB: &sup11/8;" NPT
Model VFC: 1" NPT		 (See note under dimensions)*
"O" Rings Buna-N
Mounting Inserts 10-32 x ¼" deep
Scale Hotpressed into acrylic body
Knobs ABS Plastic
Maximum Pressure and Temperature Rating Model VFA without valve: 100 psi @ 150°F
Model VFB without valve: 100 psi @ 150°F
Model VFA with valve: 150 psi @ 100°F
Model VFB with valve: 150 psi @ 100°F
Model VFC: 100psi @ 120°F
Accuracy Model VFA: 5% of full scale
Model VFB: 3% of full scale
Model VFC: 2% of full scale
Options Code
Metering Valve and Connection Brass (VFA, VFB) BV
Stainless Steel (VFA, VFB) SSV
Connections only Stainless Steel (VFA, VFB) SS
End Connections Fittings on bottom and top (all Models) EC
Pointer Flag Red ABS Plastic (VFA, VFB) PF
FDA Acceptable 316 SS float and guide rod (required, VFCII) FDA
FDA Acceptable Viton O-rings (required, VFCII) VIT
ORDER INFO


Series VF Visi-Float® Models and Ranges
Model VFA-2" Scale Model VFB-4" Scale Model VFC-5" Scale
Range
SCFH Air		 Ordering
Number		 Range
SCFH Air		 Ordering
Number		 Range
SCFH Air		 Ordering
Number
      .1-1
       .2-2
       .6-5
   1-10
   2-20
   4-30
   5-50
10-100
20-200		 1
2
3
4
5
6
7
8
9		         .3-3
     1-10
     2-20
     4-40
   10-100
   15-150
   20-200		 50
91
51
52
53
54
55		  2.5-25
     5-50
   10-100		 121
122
123
Model VFA-2" Scale Model VFB-4" Scale Model VFC-5" Scale
Range
CC Water per min.		 Ordering
Number		 Range
SCFM Air		 Ordering
Number		 Range
GPM Water		 Ordering
Number
    6-50
   10-100
   20-200		 32
33
34		   .3-3 90       .5-5
   1-10
   2-20		 141
142
143
Model VFA-2" Scale Model VFB-4" Scale Model VFC-5" Scale
Range
LPM Air		 Ordering
Number		 Range
LPM Air		 Ordering
Number		 Range
LPM Air		 Ordering
Number
  .06-0.5
   .15-1
   .6-5
   1-10
   3-25
   6-50
10-100		 21
22
23
24
25
26
27		     .2-4
   1-10
   1-20
   3-30
   4-40		 65
66
67
68
69		   60-700
200-1400
300-2800		 131
132
133
Model VFA-2" Scale Model VFB-4" Scale Model VFC-5" Scale
Range
GPH Water		 Ordering
Number		 Range
GPH Water		 Ordering
Number		 Range
LPM Water		 Ordering
Number
  .6-5
2-10
3-20
8-40		 41
42
43
44		   .5-12
1-20
6-60		 80
81
82		   2-20
   4-40
10-75		 151
152
153
  Model VFB-4" Scale  
Range
GPM Water		 Ordering
Number
.2-2
.5-5		 85
85
Model VFB-4" Scale
Range
CC/Min. Air		 Ordering
Number
100-1000 60
Model VFB-4" Scale
Range
CC/Min. Water		 Ordering
Number
2-30 82


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