Preso primary flow elements are based on a proven scientific principle of flow measurement through accurate differential pressure readings to obtain flow rate information. Preso offers the following technologies and accessories to provide flow measurement solutions for applications in the industrial, commercial and municipal fields:
Ellipse self-averaging Pitot tubes
The PRESO ELLIPSE offers the greatest accuracy of all flow sensors of its type. Its innovative elliptical design with improved aerodynamic characteristics outperforms more traditional devices, and overcomes loss of accuracy caused by fluid separation at the sensor body.
The PRESO ELLIPSE also offers energy savings, easy installation, and long-term repeatability...
COIN® Flow Meter
The Preso COIN flow meter accommodates most flows, even the most abrasive. Accuracy and reliability are achieved by its rugged construction, practical design, and simple principle of operation. It stands alone in its ability to maintain the necessary square root relationship between flow rate and differential pressure for almost any type of flow:
The PRESO Venturi offers reduced operating costs, proven accuracy, and greater rangeability. Low permanent pressure loss characteristics, due to the Venturi's "Low-Loss" unique design, reduce energy costs and result in the lowest operating cost of any such device on the market.
Available in a variety of materials and configurations, the Venturi is suitable for a wide ...
The Preso AYR Ellipse Air Flow Measuring Sensors are available for single or multiple installations in round, square or rectangular ducts. The unique patented elliptical design provides high accuracy and repeatability with low permanent pressure loss.
PRESO gages indicate pressure differential (DP) between two points. Flush and surface mounting and portable kits are available for permanent and field applications.
Flow rate is determined using the principle that the difference in pressure is proportional to the rate of flow in a pipe.
Both the lightweight GM portable kit, and the GMD DirectReadout Meter are suitable for applications including...
100% positive shut-off stainless steel ball valve
Stainless steel strainer 20 mesh
3/4" NPT ports for thermometer, RTD, pressure gage, or other instrumentation
1/4" NPT ports for DP measurement across strainer
2" NPT port for by-pass line
NPT port for strainer outlet - blowdown valve
Sizes from 2-1/2" to 4" (Coming soon in sizes 1/2" to 2")
The B-Plus Balancing Valve features Preso's "Low-Loss" Venturi design, unsurpassed in the industry for low permanent pressure loss and low energy consumption. The B-Plus is accurate to ±2% and installs in any position with minimum upstream and downstream piping requirements. The B-Plus is available in 15 sizes from 1/2" (12.7mm) to 10" (254mm) with sweat, FNPT, flanged and grooved-end connections....