2-way proportional throttle valve for block installation FES

Бренды

Size 25, 32, 40, 50, 63
Component series 3X
Max. operating pressure 315 bar

Pilot-operated 2-way proportional throttle valve in block installation technology
Installation dimensions according to DIN ISO 7368
Orifice spool electrically position-controlled
Flow in both directions
In case of power failure or cable break, the orifice spool will automatically move into seat position and block the flow in both directions
Can be used for pressure-compensated closed-loop flow control in conjunction with a pressure compensator
For external analog electronics

Type		FES
Size		25	32	40	50	63
Component series		3X
Installation position		Any
Earth	kg	3.8	5.5	8.2	12.5	21
Storage temperature range	°C	-20 … +80
Ambient temperature range	°C	-20 … +70

Valves of type FES are pilot-operated 2-way proportional throttle valves for block installation for the continuous control of flows.

Technical set-up:

The valve consists of four main assemblies:

Cover (1) with connection surface for pilot oil connections

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Main valve (2) with orifice spool (3)

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Pilot control valve (4) with proportional solenoid (5)

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General function:

Command value-dependent position control of the orifice spool (3) and thus defined opening of the orifice (8).

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The flow depends on the Δp across the orifice (8) and the position of the orifice spool (3).

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Actual value recording of the orifice spool (3) position by the position transducer (7); command/actual value comparison in the electronics (6); variations are prepared and forwarded as control output for correction of the orifice spool (3) position to the proportional solenoid (5) to the pilot control valve (4).

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Area ratio of area (14) to area (15) = 2 : 1 for NG25; 32; 40 and 1.6 : 1 for NG50; 63.

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Flow direction A → B (connect X to A);

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Flow direction B → A (connect X to B);

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External pilot oil supply possible via X.

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When the enable is disconnected, the orifice spool (3) will move onto the valve seat (9) and block the flow direction A → B in a leakage oil-free manner. The spool seal (11) seals port B to the control chamber (12) in a leakage oil-free manner; with internal pilot oil supply observe leakage oil from X via the pilot control valve to Y!

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Orifice spool position at command value 0 V or 4 mA already regulated, whereas the orifice (8) is still located in the positive overlap.

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Open orifice spool function:

(Assumption flow A → B and A connected to X)

The proportional solenoid (5) moves the pilot spool (4.1) against the spring (13) and opens the connection from control chamber (12) to Y; pressure reduction in the control chamber (12) and movement of orifice spool (3) in opening direction by the pressure in A on the area (15) plus the pressure n B on the annulus area (16).

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Close orifice spool function:

(Assumption flow A → B and A connected to X)

Flow reduction in the proportional solenoid (5); the spring (13) moves the pilot spool (4.1) against the proportional solenoid and opens the connection from X to the control chamber (12); pressure build-up in the control chamber (12); pressure on the areas (14) plus spring force (10) move the orifice spool (3) in closing direction

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Flow control function:

Can be used in connection with a pressure compensator for the load-compensated control of a flow

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Supply voltage failure:

The integrated electronics de-energize the solenoid in case of supply voltage failure or cable break in the position transducer (7)

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The pressure applied to control port X plus the spring force (10) move the spool onto the valve seat (9) where it blocks the flow A → B.

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Notice;

Failure of the supply voltage will lead to an abrupt standstill of the control axis. The acceleration forces occurring in this connection may cause machine damage!

Type FESE..CA-3X/...

Type FES..CA-3X/...

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2-way proportional throttle valve for block installation FES

2-way proportional throttle valve for block installation FES