Visi Float Flowmeter Dwyer Series VFA & VFB[Dec. 14, 2011 6:51:52]
Specification
SPECIFICATIONS
Service: Compatible gases & liquids.
Wetted Materials:
Body: Acrylic plastic;
O-ring: Buna-N ( fluoroelastomer 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/ 8Ã female NPT. VFB ranges 85 and 86 have
1/ 4Ã NPT back connections or 3/ 8Ã NPT end connections. These ranges
not available with brass valves.
Scale Length: VFA 2Ã typical length; VFB 4Ã 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) .
Model VFB â 4Ã Scale
Range SCFH Air
.3-3
1-10
2-20
4-40
10-100
10-150
20-200
SCFM Air
.3-3
CC/ Min. Air
100-1000
Range No.
50
91+
51+
52
53+
54+
55+
90
60
LPM Air
.2-4
1-10
1-20
3-30
4-40
CC/ Min. Water
2-30
GPH Water
.5-12
1-20
6-40
6-60
GPM Water
.2-2
.6-5
Range No.
65
66
67
68
69
82
80+
83+
84
81
85*
86*
Popular Ranges
VFA Series VFB Series
+ For dual range models in English and Metric add â Dâ to end of
Range No.
Popular Ranges
Model
VFA-X
VFA-X-SS
VFA-X-BV
VFA-X-SSV
VFA-X-EC
VFA-X-EC-SS
Model
VF B-X
VFB-X-SS
VFB-X-BV
VFB-X-SSV
VFB-X-EC
VFB-X-EC-SS
* Ranges 85 and 86 consult factory. Not available with brass
valve.
Description
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 & ACCESSORIES
-PF, Red ABS Plastic Pointer Flag
-VIT, Fluoroelastomer O-rings
RK-VFB, Pressure Regulator
OPTIONS & ACCESSORIES
-PF, Red ABS Plastic Pointer Flag
-VIT, Fluoroelastomer O-rings
RKA, Pressure Regulator
Description
Standard
