Description:

Air Filter Regulator FPRTB

The Type FPRTB is designed for applications that require high flow capacity and accurate process control. A Poppet valve, which is balanced by utilizing a large area flat diaphragm, insures a constant output pressure even during wide supply pressure variations. Stability of regulated pressure is maintained under varying flow conditions through the use of an aspirator tube, which adjusts the air supply in accordance with the flow velocity.

Features:

- Excellent Flow and pressure characteristic.

- STABLE OUTPUT – Dampening action of aspirator tube makes this regulator insensitive to changes in flow.

- BUILT-IN RELIEF - Ensures rapid response to circuit induced pressure changes.

- Custom made unit for control valves, Transmitters and other field mounted instruments.

-Most economically priced.

Applications:

The type FPRTB is an ideal choice for any application that calls for accurately maintained output pressure under high flow conditions. This includes, but is not limited to such applications as:

-Test Equipment

-Laboratory Equipment

-Roll Loading

-Gas Mixing

-Web Tensioning

-Test Panels

-Valve Operators

-Clutch and Brake Controls

-Actuators

Operations:

PRINCIPLE OF OPERATION:
The TYPE FPRTB SERIES, Air Filter Regulator with low torque pressure adjustment throughout the entire range of pressure. Regulator adjustment can be easily locked in place with a finger operated friction lock. The primary air through the inlet port, passed through the filter element, leaving down the containments in the bowl. When the knob is adjusted suitably, the Spring acts on the diaphragm, which in turn activates the main valve to allow the pure secondary air at a Particular pressure to the outlet. The main valve is supported between the relief valve and the main valve Spring eliminating the need for stem guiding. Toggle action between main valve and relief valve completely eliminates the alignment problems and thus regulates erratic output Pressure. Regulator maintains a constant and even delivery pressure as selected, independent of the fluctuations in the primary pressure. Regulator maintains its secondary pressure under varying air demand (air flows). This flow characteristic is given in the chart below.

PRESSURE CHARACTERISTICS::
The secondary pressure at the bottom of the diaphragm balances against the set position of the main spring to keep the main valve at the adjusted position. When the secondary pressure rises above the set point, it pushes the diaphragm away from the relief valve and the excess air finds its way to atmosphere through the bleed hole.

FLOW CHARACTERISTICS:
When the air flow from the Regulator is increased the secondary pressure falls below the set point. This ‘pressure drop’ in supply will force your equipment to function erratically. But JRU Air set reduces the pressure drop successfully by an aspirator. The aspirator connects the outlet port and the chamber under the diaphragm. When flow increases, the aspirator creates a lower pressure below the diaphragm, which in turn forces the main valve to open further and thus more air flows in, to compensate for the pressure drop.