Proportional flow control valve in 2-way version 2FRE

Description

• Size 10, 16
• Component series 4X
• Max. operating pressure 315 bar
• Flow, max. 160 l/min

Features

• Valve with pressure compensator for pressure-compensated controlling of a flow
• Proportional solenoid operation
• For subplate mounting: Porting pattern according to ISO 6263
• With electrical position control for the metering orifice
• Axially movable position transducer coil, therefore an easy zero point calibration of the metering orifice is possible without having to interfere with the control electronics (electrical-hydraulic)
• Low manufacturing tolerance of the valve and electric amplifier and amplifier module
• Flow control in both directions through rectifier sandwich plate

Product description

Proportional flow control valves of the 2FRE ... type comprise a 2-way function. They are capable of controlling a flow indicated by the electrical command value in a pressure- and largely temperature-compensated manner.

The set-up basically consists of a housing (1), proportional solenoid with inductive position transducer (2), metering orifice (3), pressure compensator (4), stroke limitation (5) as well as check valve (6). The flow setting is determined by the indication (0 to 100%) at the command value potentiometer. Via the amplifier as well as the proportional solenoid, the indicated command value has an effect on the adjustment of the metering orifice (3). The position of the metering orifice (3) is recorded by the inductive position transducer. Any existing variations from the command value are corrected by the position control.

The pressure compensator (4) keeps the pressure drop at the metering orifice (3) at a constant value at all times. Thus, the flow is pressure-compensated.

If the flow controller is only used within a range which is considerably smaller than the maximum intended rated flow of the valve, the response time of the pressure compensator (4) may be shortened by limiting the pressure compensator stroke. This allows for the reduction of unwanted start-up jumps.

If the grub screw at the stroke limitation (5) is at the left stop (screwed out), there is no pressure compensator stroke limitation.

The low temperature drift is the result of the favorable design of the metering orifice.

With command value 0%, the metering orifice is closed. In the event of a power failure or cable break at the inductive position transducer, the metering orifice closes.

From the command value 0%, a smooth start-up is possible. Via two ramps in the electric amplifier, the metering orifice can be opened and closed with delay.

Via the check valve (6), a free return flow from B to A is possible. With an additional rectifier sandwich plate of the Z4S... type under the proportional flow control valve, the supply and return flow from the actuator can be regulated.

Type code

Technical data

general

hydraulic

electrical

electrical, inductive position transducer

Diagrams/characteristic curves

measured at ν = 41 mm2/s and ϑ = 50 °C; pnom = 50 bar; amplitude 0 → 100 %; NG10 type 60L / NG16 type 160L

Transition function with stepped electric input signals

Size 10

Transition function with stepped electric input signals

Size 16

Frequency response

NG10 and 16

measured at ν = 41 mm2/s and ϑ = 50 °C

Dependency of the flow from the command value voltage (flow control from A → B)

Linear characteristic curve “L”

Size 10

Progressive

Size 10

Progressive with rapid traverse

Size 10

Linear characteristic curve “L”

Size 16

Pressure differential across the check valve from B to A

Size 10

Pressure differential across the check valve from B to A

Size 16

Zero flow from A → B

Size 10

Zero flow from A → B

Size 16

Symbols/Circuit diagrams

Proportional flow control valve (simplified, detailed)
Simplified
Detailed	Proportional flow control valve; simplified
	Rectifier sandwich plate (① = component side, ② = plate side); type Z4S ...

Electrical connection

Connection at the connector

Connection at mating connector

Inductive position transducer

Dimensions

Proportional flow control valve

Dimensions in mm

Valve mounting screws NG10 (separate order):

without rectifier sandwich plate:

4 hexagon socket head cap screws ISO 4762 - M8 x 60 - 10.9-flZn-240h-L

Tightening torque MA = 30 Nm ± 10 % , material no. R913000217

or

4 hexagon socket head cap screws ISO 4762 - M8 x 60 - 10.9

Tightening torque MA = 34 Nm ± 10 %

with rectifier sandwich plate:

4 hexagon socket head cap screws ISO 4762 - M8 x 120 - 10.9-flZn-240h-L

Tightening torque MA = 30 Nm ± 10 % , material no. R913000423

or

4 hexagon socket head cap screws ISO 4762 - M8 x 120 - 10.9

Tightening torque MA = 34 Nm ± 10 %

Notice:

The tightening torque of the hexagon socket head cap screws refers to maximum operating pressure!

Valve mounting screws NG16 (separate order):

without rectifier sandwich plate:

4 hexagon socket head cap screws ISO 4762 - M10 x 70 - 10.9-flZn-240h-L

Tightening torque MA = 64 Nm ± 10 % , material no. R913000126

or

4 hexagon socket head cap screws ISO 4762 - M10 x 70 - 10.9

Tightening torque MA = 75 Nm ± 10 %

with rectifier sandwich plate:

4 hexagon socket head cap screws ISO 4762 - M10 x 160 - 10.9-flZn-240h-L

Tightening torque MA = 64 Nm ± 10 % , material no. R913000072

or

4 hexagon socket head cap screws ISO 4762 - M10 x 160 - 10.9

Tightening torque MA = 75 Nm ± 10 %

Notice:

The tightening torque of the hexagon socket head cap screws refers to maximum operating pressure!

Rectifier sandwich plate

Dimensions in mm

Accessories

Sandwich plates

Z4S 10

Sandwich plates

Z4S 10

• Size 10
• Maximum operating pressure 315 bar
• Nominal flow 60 l/min

• Data sheet

• Spare parts and repair

Sandwich plates

Z4S 16

Sandwich plates

Z4S 16

• Size 16
• Maximum operating pressure 315 bar
• Nominal flow 160 l/min

• Data sheet

• Spare parts and repair

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z4

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z4

• For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector”
• Mating connectors for valves with one or two solenoids (individual connection)

• Data sheet

• Spare parts and repair

Ordering codes

Downloads

Proportional flow control valve, 2-way version Data Sheet | RE29190 | 2007-02-01 | English | PDF | 247k Product Groups: Proportional flow control valves