The bypass valve
is controlled by the force balance between the fluid pressure and spring forces.
the Map strategy of power turbine bypass valve
for optimum overall efficiency can be described as shown in Fig.
progressing cavity pumps) would amplify pressure variations caused by the switching bypass valve
and complicate the measurements.
Another useful exercise is to look at bypass valve
position for vane 2, 3 and 4 cooling flows.
The 2009 article noted that the Champion filter had a larger, two-piece internal gasket of materials with different densities, more filtration media, a coil spring to keep the media mated to the base and a substantial, separate bypass valve
, all of which justified the 25 percent higher price and made it a better product.
If compressor suction pressure PT1 is decreased, the first stage bypass valve
(PCV1) could be opened continuously up to a percent of stroke (between 50-60%) until the pressure differential in the second stage (PDT1) is below the set point which is the maximum allowable differential pressure.
BECAUSE THE BYPASS VALVE
IS LEFT OPEN WHEN YOU EXIT THE VEHICLE, YOU'LL NEED TO CLOSE IT WHEN YOU RE-ENTER THE VEHICLE.
in Figure 5 on the chilled water side of the heat exchanger, I suggest a bypass valve
be added at the primary chilled water pump suction side (between chiller return and supply lines), so that during full economizer (no mechanical cooling needed), chilled water return doesn't have to be pumped through chiller evaporators after leaving the heat exchanger.
Turn the bypass valve
to the "bypass" position and rotate the dial to the "backwash" position.
In the event of overpressure, the discs are engineered to rupture and pilot an internal oil bypass valve
, so oil is never vented to the atmosphere, protecting the environment and the operator.
After a second takeoff attempt revealed a similar power loss, the pump was removed, revealing the bypass valve
assembly had dislodged from the pump body and acted as a flow restrictor.
Additional standard features include a NEMA 12-style electrical control enclosure with IEC electrical components, a disconnect switch, a pressure-actuated bypass valve
, a system status graphics display and a to process oil pressure gauge.