Product Summary
B+ Balance Flow Control
Preso's B+ balancing
industrial valves are Venturi style, manual balancing valves offered in sizes 1/2" to 10". The B+ features Preso's “Low Loss” Venturi design, unsurpassed in the industry for low permanent pressure loss and low energy consumption. The 1/2" to 2" models are constructed of brass with sweat or FNPT process connections. Larger size models ranging from 2-1/2" to 10" are constructed of cast iron and are available with flanged class 125# or grooved coupling ends. Class 250# flanged valves are available from 2-1/2" to 4". Features: Installs with minimal upstream and downstream piping requirements Mounts in any position Fixed orifice – allows for quick and accurate balancing
Available in 15 sizes from 1/2" to 10"
Memory lock mechanism handle for sizes 1/2" to 10"
BAR Ellipse
® Annular Element
The Ellipse annular flow device is a primary
flow sensor designed to produce a differential pressure that is proportional to flow. Its patented elliptical shape provides the lowest pressure loss in the industry. The Ellipse flow meter is designed with a series of ports facing the upstream velocity pressures and flow sensing ports strategically located ahead of the trailing edge flow separation. As a result of this innovative design, the Ellipse is capable of highly accurate, precise
flow measurements that are proportional to the actual flow rate. Features: Turndown ratio of 17:1; no vacuum effects No vortex generation Accuracy of ±3/4% uncalibrated
No moving parts equals long, trouble-free service life
BHL Ellipse
® ® Annular Hot-Tap Element & BHR Ellipse Annular Wet-Tap Element
The Ellipse annular flow device is also offered in a hot-tap or wet-tap version. The BHL Annular Hot-Tap Element is suitable for high pressure applications in pipe sizes from 2" to 24". Preso also offers the model BHR used for wet-tap low pressure installations in pipe sizes beginning at 2" up to 24". The models BHL and BHR utilize the same patented design as the BAR to produce a differential pressure that is proportional to flow. Features: Accuracy of ±3/4% uncalibrated Repeatability of ±0.1% of readings Hot-Tap models can be installed without system shutdown
Low installation cost Wet-Tap models can be installed without draining the system
The BIN is a highly reliable averaging Pitot tube which generates a pressure differential between its upstream (stagnation) ports and its downstream (static) ports that is proportional to the flow rate squared. It can be used to measure liquid or air in pipe sizes between 2" up to 24". An opposite side support is supplied standard on pipe sizes 8" and larger. Features: Accuracy of ±3% Easy, low-cost installation - great for retrofits Very low pressure drop
Bi-directional flow measurement capability
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