The Model PFV FM approved Fire Pump System features the Preso CV Venturi. The CV is a dif fer en tial pres sure el e ment
de signed to ac cu rate ly mea sure fl ow. It can be installed in any po si tion with min i mal straight pipe requirements (5 pipe
diameters up stream and 2 pipe diameters downstream). Preso can relate the success of the CV Venturi to the Low-Loss
design which amounts to over 35 years of fi eld performance in a wide variety of applications.
The gage is a Direct-Readout meter with a dial featuring a 270° arc
for fast and accurate reading. A precision engineered, dust-tight
case ensures trou ble-free op er a tion. Preso gages are protected against overload by a unique diaphragm housing design. When the pres sure difference exceeds the range, the gage will accept the accidental ap pli ca tion of up to 60 PSIG without damage. Under nor mal conditions the dif fer en tial pressure should not exceed the range of the gage.