The 2FRE16 2-way proportional flow control valve is a high-performance proportional flow control valve, which is suitable for applications where the speed of hydraulic actuators (cylinders or motors) needs to be precisely adjusted. Compared to proportional valve 2FRE10, valve 2FRE16 has a larger diameter, allowing a higher flow range. And proportional valve 2FRE16 is suitable for higher power hydraulic systems.
| Hydraulic | ||
| Operating pressure (Mpa) | 31.5 | |
| Minimum pressure differential (Mpa) | size 10 | size 16 |
| 0.3~0.8 | 0.6~1 | |
| Pressure fluid | Mineral oil(for NBR seal), Phosphate ester (for FPM seal) | |
| Viscosity range (mm2/s) | 2.8 to 380 | |
| Pressure fluid temperature range (℃） | -20 to +70 | |
| Hysteresis (%) | ＜±1Qmax | |
| Repeatability (%) | ＜1 Qmax | |
| Sample spread (%) | ＜±2 | |
| Installation | optional | |
| Weight (kg) | 6 | 8.3 |
| Electrical | ||
| Voltage type | DC 24V | |
| Coil resistance of solenoid (Ω) | Cold value at 20℃ 10, Max warm value 13.9 | |
| Max. Power(VA) | 50 | |
| Inductivity (mH) | 6 to 8 | |
| Oscillator frequency (Khz) | 2.5 | |
| VT-5010S30 Demand of insulation IP65 | IP65 | |
▶Valve with a pressure compensator for pressure compensated control of a flow
▶Actuation via a proportional solenoid
▶With electrical position feedback of the control orifice
▶The position transducer coil can be axially moved making the zero point adjustment of the control orifice easy, without having to touch the electronics (electrical-hydraulic)
▶Minimum sample variation of valve and electrical amplifier VT 5004 (separate order)
Application:
Proportional flow control valve 2FRE16 is widely used in heavy industrial hydraulic systems, engineering machinery and mobile hydraulics, metallurgy and mining equipment.
Typical system examples：Excavator bucket control circuit
PLC → Proportional Amplifier → 2FRE16 → Hydraulic Cylinders
↑
Pressure sensor (closed loop feedback)
By adjusting the input electrical signal, the bucket movement can be smoothly accelerated/decelerated to avoid hydraulic shock.
The type 2FRE.. proportional flow control valves have a 2-way function. They can, from an applied electrical command value, regulate a flow which is pressure and to a great extent temperature compensated.
They basically comprise of the housing (1), proportional solenoid with inductive position transducer (2), measuring orifice (3), pressure compensator (4), stroke limiter (5), as well as an optional check valve (6).
The setting of the flow is determined (0 bis 100 %) at the command value potentiometer. The applied command value, causes via the amplifier as well as the proportional solenoid, the adjustment of the measurement orifice (3). The position of the measurement orifice (3) is obtained by the position transducer. Any deviations from the command value are compensated for by the position feedback control.
The pressure compensator (4) holds the pressure drop at the measurement orifice (3) at a constant value. The flow is, therefore pressure compensated.
The small temperature drift is achieved due to the design of the measurement orifice. At a 0 % command value the measurement orifice is closed.
In the case of a loss of power or a cable break at the position transducer the measurement orifice closes. From a 0 % command value a jump free start is possible. Via two ramps within the electrical amplifier it is possible to delay the opening and closing of the measurement orifice.
Via the check valve (6) free flow is possible from B to A.
Strcture of Proportional Flow Control Valve 2FRE16
Symbols of Proportional Flow Control Valve 2FRE16
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Nro 27, Yangsha Road, Huilong Town, Qidong City, Jiangsun maakunta, Kiina
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