Directional poppet valves, directly operated, with solenoid actuation SED 10…XN

Description

• Size 10
• Component series 1X
• Maximum operating pressure 350 bar
• Maximum flow 40 l/min
• Area of application in accordance with the Explosion Protection Directive 2014/34/EU: II 3G; II 3D
• Area of application according to technical rules EAC TR CU 012/2011: II 3G; II 3D
• Type of protection of the valve solenoids:
  – Ex ec IIC T3 Gc according to EN 60079-7
  – Ex tc IIIC T140°C Dc according to EN 60079-31

Features

• 3/2- or 4/2-way version
• Porting pattern according to ISO 4401-05-04-0-05
• Wet-pin DC solenoids
• Safe switching also with longer standstill periods under pressure
• Solenoid coil can be rotated by 90°
• Electrical connection with individual connection
• With manual override, optional

Product description

3/2 directional seat valve

General information

Directional valves of the type SED are direct operated directional seat valves with solenoid actuation. They control start, stop and direction of flow.

Directional valves basically comprise the housing (1), the solenoid (2), the valve seats (7) and (11) and the control spool (4).

The manual override (6) allows for the switching of the valve without solenoid energization.

Basic principle

The initial position of the valve (normally open "UK" or normally closed "CK") is determined by the arrangement of the spring (5). The chamber (3) behind the control spool (4) is connected to port P and sealed against port T. Thus, the valve is pressure-compensated in relation to the actuating forces (solenoid and spring).

By means of the control spool (4), the ports P, A and T can be loaded with the maximum operating pressure (350 bar) and the flow can be directed into both directions (see symbols).

In the initial position, the control spool (4) is pressed onto the seat (11) by the spring (5), in spool position, it is pressed onto the seat (7) by the solenoid (2). The flow is blocked.

Seat valves can be used according to the symbols and the related operating pressures and flows (see "Performance limits").

Type M-3SED 10 UK...
Type M-3SED 10 CK...

Throttle insert "...B"

The use of a throttle insert is required when, due to prevailing operating conditions, flows occur during the switching processes, which exceed the performance limit of the valve.

4/2 directional seat valve

With a sandwich plate, the Plus-1 plate, under the 3/2 directional seat valve, the function of a 4/2 directional seat valve is achieved.

Function of the Plus-1 plate:

Initial position:

The main valve is not operated. The spring (5) holds the control spool (4) on the seat (11). Port P is blocked and A is connected to T. Apart from that, one control line is connected from A to the large area of the control spool (8), which is thus unloaded to the tank. The pressure applied via P now pushes the ball (9) onto the seat (10). Now, P is connected to B, and A to T.

Transition position:

Upon actuation of the main valve, the control spool (4) is shifted against the spring (5) and pressed onto the seat (7). During this, port T is blocked, while P, A, and B are briefly connected to each other.

Switching position:

P is connected to A. As the pump pressure acts via A on the large area of the control spool (8), the ball (9) is pressed onto the seat (12). Thus, B is connected to T, and P to A. The ball (9) in the Plus-1 plate has a “positive spool overlap”.

Notice:

If the annulus area of differential cylinders is not connected to port A, a pressure peak is created in port B during the switching process. This pressure peak may exceed the maximum admissible operating pressure over the permissible limit.

The use of the Plus-1 plate and the seat arrangement offer the following options:
Symbol	D	Y

Type M-4SED 10 Y…

Schematic illustration: Initial position

Throttle insert, check valve insert

Throttle insert	Check valve insert
The use of a throttle insert is required if, due to prevailing operating conditions, flows which exceed the performance limit of the valve can occur during the switching processes. Examples: - Accumulator operation - Use as pilot control valve with internal pilot fluid tapping.	The check valve insert allows a free flow from P to A and closes A to P.

Type code

01	Mineral oil			M
02	3 main ports			3
	4 main ports			4
03	Seat valve			SED
04	Size 10			10
Symbols
05	Main ports	3	4
		✔	–	UK
		✔	–	CK
		–	✔	D
		–	✔	Y
06	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions)			1X
07	Operating pressure up to 350 bar			350
08	Wet-pin solenoid with detachable coil			C
Voltage
09	Direct voltage 24 V			G24
10	With concealed manual override			N9
	Without manual override			no code
Explosion protection
11	"Not igniting", for details, please refer to the "information on explosion protection"			XN
Electrical connection
12	Individual connection
	Solenoid without mating connector, see "Electrical connection"			K4
Throttle insert
13	Without check valve insert, without throttle insert			no code
	Throttle Ø 1.2 mm			B12
	Throttle Ø 1.5 mm			B15
	Throttle Ø 1.8 mm			B18
	Throttle Ø 2.0 mm			B20
	Throttle Ø 2.2 mm			B22
Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data")
14	NBR seals			no code
	FKM seals			V
Notice: Representation of the symbols according to DIN ISO 1219-1.

Technical data

(For applications outside these values, please consult us!)

general

hydraulic

electrical

Information on explosion protection – Directive 2014/34/EU

Information on explosion protection – Technical rules EAC TR CU 012/2011

Special application conditions for safe application

• Connection lines must be passed in a pull-relieved way.

• The valve is to be installed in a way that no impact stress > 4 J can become effective.

• In order to avoid dangers caused by static charge, the base and/or subplate on which the valve is to be fitted must be electrically conductive and included in the equipotential bonding.

• The valve must not be installed close to charge generating processes.

• Dust layers with a thickness of > 50 mm are inadmissible.

• Maximum hydraulic fluid temperature:
  In case of bank assembly, as long as only one solenoid is energized at a time and in case of individual assembly: +80 °C
  In case of bank assembly, if more than one solenoids are energized simultaneously: +65 °C

• The maximum temperature of the surface of the valve jacket is 110 °C. This has to be considered when selecting the connection cable and/or contact of the connection cable with the surface of the jacket is to be prevented.

Performance limits (measured with HLP46, ϑoil = 40 ±5 °C)

	Symbol		Comment	Operating pressure in bar				Flow in l/min
				P	A	B	T
2-way circuit	UK		With 2/2-way circuits, port P or T must be closed.	350	350	‒	350	40
	CK			350	350	‒	350	40
3-way circuit	UK			350	350	‒	350	40
	CK			350	350	‒	350	40
4-way circuit (flow only possible in the direction of arrow)	D		3/2 directional valve (symbol "UK") in connection with Plus-1 plate: pP ≥ pA ≥ pB ≥ pT	350	350	350	pP/pA/pB-40	40
	Y		3/2 directional valve (symbol "CK") in connection with Plus-1 plate: pP ≥ pA ≥ pB ≥ pT	350	350	350	pP/pA/pB-40	40

Notice:

The performance limits were determined when the solenoids were at operating temperature, at 10 % undervoltage and without tank preloading.

Diagrams/characteristic curves

(measured with HLP46, ϑOil = 40 ±5 °C)

Δp-qV characteristic curves

3/2 directional seat valve

Δp-qV characteristic curves

4/2 directional seat valve

Δp-qV characteristic curves

Check valve insert

Δp-qV characteristic curves

Throttle insert

Electrical connection

The type-examination tested valve solenoid of the valve is equipped with an electrical connection according to the following table. The electrical connection of the solenoid is polarity-independent.

Electrical connections and coil connection combinations

Ordering code connector		Top view	Circuit diagram	Pin	Connections, assignment
3-pole connector (2+PE) according to DIN EN 175301-803	K4			1	Solenoid coil, polarity-independent
				2
					Earthing

Over-current fuse and switch-off voltage peaks

Notice:

A fuse which corresponds to the rated current according to DIN 41571 and EN / IEC 60127 has to be connected upstream of every valve solenoid (max. 3 x Irated).

The shut-off threshold of the fuse has to match the prospective short-circuit current of the supply source.

The prospective short-circuit current of the supply source may amount to a maximum of 1500 A.

This fuse may only be installed outside the potentially explosive atmosphere or must be of an explosion-proof design.

When inductivities are switched off, voltage peaks result which may cause faults in the connected control electronics.

The voltage peak must be damped by a suitable external circuitry. We recommend a circuitry with a suppressor diode with a limitation voltage of approx. 50 V.

Dimensions

3/2 directional seat valve – version “UK"

Dimensions in mm

Required surface quality of the valve contact surface

3/2 directional seat valve – version "CK"

Dimensions in mm

Required surface quality of the valve contact surface

4/2 directional seat valve – version “D”

Dimensions in mm

Required surface quality of the valve contact surface

4/2 directional seat valve, version “Y”

Dimensions in mm

Required surface quality of the valve contact surface

Valve mounting screws (separate order)

Subplates (separate order) with porting pattern according to ISO 4401-05-04-0-05, see data sheet 45100.

Notices:

• Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition. The "G...J3" versions are free from aluminum and/or magnesium and galvanized.

• Deviating from ISO 4401, port T is called TA, port T1 is called TB.

• The dimensions are nominal dimensions which are subject to tolerances.

Installation conditions

(Dimensions in mm)

Notice:

With respect to the hydraulic fluid temperature, please observe the “Special conditions for safe use” in chapter "Technical data".

Information

Seat valves can be used according to the spool symbols as well as the assigned operating pressures and flows (see "Performance limits").

In order to ensure safe functioning, it is absolutely necessary to observe the following:

• Seat valves have a negative spool overlap, i.e. during the switching process, there is leakage oil. This process takes, however, place within such a short time that it is irrelevant in nearly all applications.

• The specified maximum flow must not be exceeded (use a throttle insert for flow limitation, if necessary).

4 main ports:

• The following lower operating values have to be observed:
  pmin = 8 bar, qV > 3 l/min.

• The ports P, A, B and T are clearly specified according to their tasks. They must not be exchanged or closed.

• Port T must always be connected.

• Observe the pressure level and pressure distribution.

• The flow is only permitted in the direction of arrow.

Accessories

Subplates

Subplates

Mating connectors for valves with connector “K4”, without circuitry, standard, with assembled connection line (ATEX)

DS2513...ATEX

Mating connectors for valves with connector “K4”, without circuitry, standard, with assembled connection line (ATEX)

DS2513...ATEX

• 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

	Directional seat valves, direct operated, with solenoid actuation Manual | RE22045-XN-B | 2021-02-01 | English | PDF | 3.3MB Product Groups: Industrial Hydraulics Type SED10..1X/...XN...
	Directional seat valves, direct operated, with solenoid actuation Data Sheet | RE22045-XN | 2021-05-01 | English, United States | PDF | 1MB Product Groups: Directional seat valves Type SED …XN
	Explosion-protected hydraulic products for industrial and mobile applications Brochure | R999000373 | 2017-03-01 | English | PDF | 5.8MB Product Groups: Pumps, CD - single rod cylinder, Proportional, high-response and servo valves, Axial piston pumps, Mobile controls Product overview