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Flow Meter "Dwyer" Model VFA-4-SSV




Series VFA & VFB

Visi-Float® Flowmeters

Used to Indicate or Manually Control Air or Water Flow


The 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 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.



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) @ 150F (65C); 150 psig (10 bar) @100F (38C);

With Valve: 100 psig (6.9 bar) @120F (48C).


Accuracy: VFA = 5% of full scale; VFB = 3% of full scale.


Process Connection: 1/8” female NPT. VFB ranges 85 and 86 have ¼” 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).


How to Order

Series – Range No. (“X”)-Valve-Option

Example: VFA-9-BV

Series VFA with 20-200 SCFH Air Range & Brass Valve


VFA Series




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


- PF, Red ABS Plastic Pointer Flag

- VIT, Fluoroelastomer O-rings

RKA, Pressure Regulator



This product was added to our catalog on Monday 26 December, 2011.
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Nanomachinery Co., Ltd.
4, Soi Petchkasem 100 ,Phetchkasem Rd. ,Bangkaenue ,Bangkae ,Bangkok, 10160, THAILAND.
Tel : 086-322-6876 ,02-421-9927 ,Fax : 02-809-2591 E-mail : pongthorn@nano-machinery.com
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