Directional poppet valves, directly operated, with solenoid actuation SE 6 …XM

Description

• Size 6
• Component series 6X
• Maximum operating pressure 420 bar
• Maximum flow 4 l/min
• Area of application in accordance with the Explosion Protection Directive 2014/34/EU: I M2
• Type of protection valve:
  Ex h I Mb X according to EN 80079-38
• Type of protection valve solenoid:
  Ex ib I Mb according to EN 60079-0
• Valve solenoid certified according to IECEx

Features

• 3/2- or 4/2-way version
• For intended use in potentially explosive atmosphere
• Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole)
• Blocked connection tight
• Safe switching also with longer standstill periods under pressure
• Wet-pin DC solenoids
• Electrical connection as individual connection with cable gland or connector (depending on the valve type)
• With manual override

Product description

3/2 directional seat valve

General

Type SE directional seat valves are direct operated directional valves with solenoid actuation. They control start, stop and direction of flow.

The directional valves basically comprise a housing (1), the solenoid (2), the hardened valve system (3) and the balls (4.1 and 4.2) as closing element.

For unobjectionable functioning, the hydraulic system has to be bled properly.

Basic principle

In the initial position, the ball (4.1) is pressed onto the seat by the spring (7), in spool position, the ball (4.2) is pressed onto the seat by the solenoid (2). The force of solenoid (2) acts via the ball (5) on the actuating plunger (6) that is sealed on two sides. The chamber between the two sealing elements is connected to port P. Thus, the valve system (3) is pressure-compensated in relation to the actuating forces (solenoid or return spring). Thus, the valves can be used up to 420 bar.

Notes:

• The 3/2 directional seat valves have a "negative spool overlap". Therefore, port T must always be connected. That means that during the switching process – from the starting of the opening of one valve seat to the closing of the other valve seat – ports P–A–T are connected with each other. However, this process takes place within such a short time that it is irrelevant in nearly all applications.

• The manual override (10) allows for the switching of the valve without solenoid energization.

• Make sure that the specified maximum flow is not exceeded. A throttle insert must be used for flow limitation, if necessary (see "Planning instruction").

• In order to switch the valve safely or maintain it in its spool position, the pressure situation at the relevant ports must be as follows: P ≥ A ≥ T.

• Ports P, A, B and T are clearly specified according to their tasks. They must not be exchanged or closed. The flow is only admissible in the direction of arrow.

The seat arrangement offers the following options:
Symbol	U	C
Initial position	P and A connected, T blocked	P blocked, A and T connected
Spool position	P blocked, A and T connected	P and A connected, T blocked

Type E-3SE 6 C…

4/2 directional seat valve

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

Function of the Plus-1 subplate

• Initial position
  The main valve is not actuated. The spring (7) holds the ball (4.1) 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 (12), which is thus unloaded to the tank. The pressure applied via P now pushes the ball (13) onto the seat (14). Now, P is connected to B, and A to T.

• Transition position
  When the main valve is actuated, the control spool (8) is shifted against the spring (7) and the ball (4.2) is pressed onto the seat (15). During this, port T is blocked, P, A, and B are briefly connected to each other.

• Spool position
  P is connected to A. As the pump pressure acts via A on the large area of the control spool (12), the ball (13) is pressed onto the seat (16). Thus, B is connected to T, and P to A. The ball (13) in the Plus-1 subplate has a "positive spool overlap".

Notes:

• When operating 4/2 directional seat valves to control differential cylinders, the annulus area of the cylinder must only be connected with connection A of the valve. Otherwise, pressure peaks can be created while switching, which will exceed the maximum operating pressure.

• When operating 4/2 directional seat valves, the minimum pressure must be 8 bar and the minimum flow must be 3 l/min.

• In order to switch the valve safely or maintain it in its spool position, the pressure situation at the relevant ports must be as follows: P ≥ A ≥ B ≥ T.

• Ports P, A, B and T are clearly specified according to their tasks. They must not be exchanged or closed. The flow is only admissible in the direction of arrow.

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

Type E-4SE 6 Y…

Type code

01	Oil-in-water emulsion			E
	Water			W
02	3 main ports			3
	4 main ports			4
03	Seat valve			SE
04	Size 6			6
Symbols
05	Main ports	3	4
		✔	–	U
		✔	–	C
		–	✔	D
		–	✔	Y
06	Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions)			6X
07	Operating pressure 420 bar			420
08	High-power solenoid (wet-pin in hydraulic fluid)			B
Voltage (direct voltage 12 V)
09	Nominal power supply 120 mA (only version "E")			G12–12
	Nominal power supply 190 mA (only version "W")			G12-19
10	With manual override			N
Explosion protection
11	“Intrinsically safe” for device group I, for details, please refer to the "information on explosion protection"			XM
Electrical connection For details, see "Electrical connection"
12	Solenoid with terminal box and cable gland (only version "E")			Z2
	Solenoid with connector directed towards the valve housing (only version "W")			K20ZL
13	Without check valve insert, without throttle insert			no code
	With check valve insert			P
	Throttle Ø 1.2 mm			B12
	Throttle Ø 1.5 mm			B15
	Throttle Ø 1.8 mm			B18
	Throttle Ø 2.0 mm			B20
Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data")
14	FKM seals			V

Notices:

• Representation according to ISO 1219-1.

• The manual override cannot be assigned a safety function.

Technical data

general

hydraulic

electrical

Information on explosion protection

Special application conditions for a safe application

• Connection lines must be passed in a strain-relieved way. The first mounting point must be within 150 mm of the valve solenoid.

• The maximum temperature of the surface of the valve jacket is 80 °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.

Switching times t in ms (installation position: solenoid horizontal)

Notice:

The switching times were determined at a hydraulic fluid temperature of 40 °C and a viscosity of 46 mm2/s. Deviating hydraulic fluid temperatures can result in different switching times. Switching times change dependent on operating time and application conditions.

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

Performance limits

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

Notice:

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

Electrical connection

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

Ordering code for electrical connection	Type of connection Description	Circuit diagram	Ordering code solenoid, availability
Z2	Electrical connection via 2-pole terminal in terminal box With cable gland Without operating display		G12–12 (120 mA)
	Cable gland
	Threaded connection	M20x1.5
	Line diameter	6.5 ... 9.5 mm
	Sealing	Outer sheath sealing
	Cable
	Temperature rating	≤-20 … ≥+80 °C
	Connection terminal solenoid
	Line cross-section	0.75 ... 1.5 mm2
K20L	Electrical connection via connector, 3-pole with pin contacts, type 845-11-1125-001, FCI/Souriau Operating display via light emitting diode (LED), red Suitable mating connector, type 845-11-8522-001 (FCI/Souriau, separate order)		G12–19 (190 mA)
	Cable
	Temperature rating	≤-20 … ≥+80 °C

Notice:

Only use finely stranded conductors if they have pressed-on wire end ferrules.

Dimensions

3/2 directional seat valve; Version "Z2"

Dimensions in mm

Required surface quality of the valve contact surface

3/2 directional seat valve; Version "K20ZL"

Dimensions in mm

Required surface quality of the valve contact surface

4/2 directional seat valve; Version "Z2"

Dimensions in mm

Required surface quality of the valve contact surface

4/2 directional seat valve; Version "K20ZL"

Dimensions in mm

Required surface quality of the valve contact surface

Valve mounting screws (included in the scope of delivery)

Notice:

Only use valve mounting screws with the listed thread diameters and strength properties. Observe the screw-in depth.

Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, 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.

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

Installation conditions

(Dimensions in mm)

Dimensions in mm

Notice:

Please observe the "Special conditions for safe use".

Project planning information

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.

Accessories

Subplates

Subplates

Downloads

	Directional seat valves, direct operated, with solenoid actuation Data Sheet | RE22047-XH | 2021-07-01 | English | PDF | 916k Product Groups: Directional seat valves Type SE …XH and SE …XM
	Directional seat valves,direct operated,with solenoid actuation Manual | RE22047-XH-B | 2021-05-01 | English | PDF | 1.6MB Product Groups: Industrial Hydraulics I M2 (SE6..6X/...XM...) II 2G (SE6..6X/...XH...)