Automatic flow limiting valve with downstream pressure reduction - E3114-02 / E4114-02
The E3114-02 / E4114-02 automatic valve reduces and stabilizes the downstream pressure at a set value, regardless of flow variations, and at the same time maintains the flow rate below a maximum value.
The circuit includes a flanged orifice, to be connected to the pilot and necessary for its operation.
Equipped with a visual position indicator and made entirely of stainless steel and ductile iron coated with epoxy paint using the FBT ( fluid bed technology ) technique, the valve reduces pressure drops, vibrations and damage linked to the phenomenon of cavitation.
Technical design
| E3114-02 | 80 | 10 16 | 33 | E34A8016P02 |
| E3114-02 | 100 | 10 16 | 40 | E34B1016P02 |
| E3114-02 | 125 | 10 16 | 59 | E34B1216P02 |
| E3114-02 | 150 | 10 16 | 66 | E34B1516P02 |
| E3114-02 | 200 | 10 | 112 | E34B2010P02 |
| E3114-02 | 200 | 16 | 112 | E34B2016P02 |
| E3114-02 | 250 | 10 | 190 | E34B2510P02 |
| E3114-02 | 250 | 16 | 190 | E34B2516P02 |
| E3114-02 | 300 | 10 | 307 | E34B3010P02 |
| E3114-02 | 300 | 16 | 307 | E34B3016P02 |
| E3114-02 | 400 | 10 | 518 | E34B4010P02 |
| E3114-02 | 400 | 16 | 518 | E34B4016P02 |
| E3114-02 | 500 | 10 | 862 | E34B5010P02 |
| E3114-02 | 500 | 16 | 862 | E34B5016P02 |
| E3114-02 | 600 | 10 | 1002 | E34B6010P02 |
| E3114-02 | 600 | 16 | 1002 | E34B6016P02 |
| E4114-02 | 40/50 | 10 16 | 27 | E44A5016P02 |
| E4114-02 | 65 | 10 16 | 29 | E44A6516P02 |
| E4114-02 | 80 | 10 16 | 34 | E44A8016P02 |
| E4114-02 | 100 | 10 16 | 51 | E44B1016P02 |
| E4114-02 | 150 | 10 16 | 99 | E44B1516P02 |
| E4114-02 | 200 | 10 | 156 | E44B2010P02 |
| E4114-02 | 200 | 16 | 156 | E44B2016P02 |
| E4114-02 | 250 | 10 | 267 | E44B2510P02 |
| E4114-02 | 250 | 16 | 267 | E44B2516P02 |
| E4114-02 | 300 | 10 | 443 | E44B3010P02 |
| E4114-02 | 300 | 16 | 443 | E44B3016P02 |
| E4114-02 | 400 | 10 | 784 | E44B4010P02 |
| E4114-02 | 400 | 16 | 784 | E44B4016P02 |
| E4114-02 | 600 | 10 | 2250 | E44B6010P44 |
| E4114-02 | 600 | 16 | 2250 | E44B6016P44 |
Features
Applications
- Downstream of pumps to reduce pressure and prevent overloads
- To protect against pressure surges and ensure at the same time the supply of parts of the network located at higher altitudes in civil and industrial installations.
- In filtration systems to avoid damage and malfunctions due to excesses of flow rate or pressure.
Accessories
- The position indicator with 4-20 mA output.
- The open-close indicator.
- Manometers.
- Self-cleaning high capacity filter.
Notes to the designer
- Inlet and outlet pressure, flow rate and application are required for cavitation sizing and analysis.
- It is recommended to leave a straight section of pipe 5 diameters long between the valve and the calibrated flange, and another segment, 3 diameters long, downstream of the latter (image on the next page).
Optional configurations
- Flow control valve with anti-reflux system.
- Pressure reduction and flow control with high sensitivity pilot.
- Pressure reduction and flow control with solenoid valve for remote on-off control.
Operating conditions
- Fluid: treated water.
- Minimum pressure: 1,5 bar.
- Maximum pressure: 16 bar. Higher on request.
- Maximum temperature: 70 °C.
Reduction pilot adjustment range
- Red spring: 1.5 to 15 bar
Flow pilot adjustment field
- The flanged orifice is sized according to the maximum design flow rate. Variations from the setting value are possible in accordance with the flow rate table supplied with the valve.
How it works
The valve is controlled by two adjustable two-way pilots, for pressure reduction (14) and flow control (5).
When the downstream pressure, detected at the flanged orifice (15) located on the pipeline, exceeds the set value, the pilot 14 limits the flow in the circuit; the pressure in the valve chamber (10), consequently, rises, causing the shutter (11) to descend towards the seat (12) and the downstream pressure to drop.
When, however, the latter falls below the calibration threshold of the pilot (14), the shutter (11) rises, reducing the pressure drop and causing the downstream value to rise.
The flow control pilot (5) spring force compensates for the difference in pressure upstream and downstream of the flanged orifice (15).
In the event that the flow rate tends to be higher than the maximum value, the pilot reduces the degree of opening, limiting the flow rate of the circuit to gradually increase the pressure in the valve chamber (10) in order to contain the flow through the seat (12) within the calibration range.
Installation diagram
In the valve installation diagram, shut-off devices (1, 2), a bypass, are recommended with direct acting pressure control valves (4), to allow maintenance, combined anti-water hammer vents FBA (6, 7) for air release, upstream and downstream, and a DRV-S relief valve (5).
The flange calibrated (8) must be placed 5 DN downstream of the valve. Another 3 diameters of distance downstream of the orifice are necessary before changes in direction or slope that cause turbulence in the fluid.
