Dwyer VFA VFB series

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 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.

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



Service: Compatible gases and 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: 1/8″ 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).