Bosch Rexroth M SED 6 VE1 Series User manual

Explosion-proof
hydraulic valves,
Type M-.SED 6...VE1...
Operating instructions
RE 22049-VE1-B0/12.17
Replaces: 04.13
Material Number:
R901489373

1/16
3/2 and 4/2 directional seat valves
with solenoid actuation
Type M-.SED 6...VE1...
Size 6
Component series 1X
Maximum operating pressure 350 bar
Maximum flow 25 l/min
RA 22049-VE1-B1/04.13
Information on the explosion protection:
– Area of application according to NEC 505: Class I, Zone 1
– Type of protection of the valve solenoid:
AEx e mb IIC T4 Gb according to
ANSI / ISA 60079-7
ANSI / ISA 60079-18
For explosive areas
Part I Data sheet
What you need to know about these operating instructions
These operating instructions apply to the explosion-proof version of Rexroth valves and consist of the following two parts:
Part I Data sheet 22049-VE1-B1
Part II Product-specific instructions 22049-VE1-B2
You can find further information on the correct handling of Rexroth hydraulic products in our publication "General product informa-
tion on hydraulic products" 07008.
Operating instructions 22049-VE1-B0
Actual product may differ

2/16 Bosch Rexroth AG Hydraulics M-.SED 6...VE1... RA 22049-VE1-B1
Table of contents
Contents Page
Features 2
Ordering code and scope of delivery 3
Function, section, control spool symbols 4
Technical data 6
Technical data, information on the explosion protection 7
Switching times 7
Electrical connection 8
General information 10
Performance limits 10
Characteristic curves 11
Dimensions 12
Installation conditions 16
Features
– Direct operated directional seat valve with solenoid actua-
tion for use in explosive atmospheres
– Porting pattern according to ISO 4401-03-02-0-05
– Subplates available in FE/ZN version (see pages 12 to 15)
– Blocked, leak-tight connection
– Safe switching even with longer standstill periods un-
der pressure
– Wet-pin DC solenoids
– Solenoid coil rotatable by 90°
– Electrical connection as single connection with pipe
thread NPT 1/2"
– With concealed manual override

Hydraulics Bosch Rexroth AGRA 22049-VE1-B1 M-.SED 6...VE1... 3/16
3 main ports = 3
4 main ports = 4
Seat valve, electric,
direct operated
Size 6 = 6
Component series 10 to 19 = 1X
(10 to 19: Unchanged installation and connec-
tion dimensions)
Operating pressure up to 350 bar = 350
Solenoid, wet-pin = C
Direct voltage 24 V = G24
Direct voltage 110 V = G110
Ordering code and scope of delivery
Included in the scope of delivery:
Valve operating instructions
no code = NBR seals
V = FKM seals
Notice:
Observe compatibility
of seals with hydraulic
fluid used!
no code = Without
check valve insert,
Without throttle insert
P = With check valve insert
B12 = Throttle Ø 1.2 mm
B15 = Throttle Ø 1.5 mm
B18 = Throttle Ø 1.8 mm
B10 = Throttle Ø 2.0 mm
B12 = Throttle Ø 2.2 mm
Electrical connection
Z2 = Solenoid with terminal box
and cable gland,
For details see chapter
Electrical connection
VE1 =
Explosion protection "Increased Safety",
For details, see information on explosion
protection, page 7
N9 = With concealed manual override
no code = Without manual override
M SED 6 1X 350 C VE1 Z2
Main ports 3 4
Control spool symbols
•–= UK
•–= CK
–•= D
–•= Y
• = available

TAP
TAP
1
5
741132
5
1
711
6
4/16 Bosch Rexroth AG Hydraulics M-.SED 6...VE1... RA 22049-VE1-B1
Function, section, control spool symbols: 3/2 directional seat valve
Control spool symbol
"UK"
Control spool symbol
"CK"
Type M-3SED 6 UK1X/350C...N9VE1Z2
Type M-3SED 6 CK...
General:
The directional valve type M-.SED is a direct operated di-
rectional seat valve with solenoid actuation. It controls the
start, stop and direction of flow and basically comprises
a 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 nor-
mally 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 in both directions (see control
spool 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 in a leak-
free manner.
Seat valves can be used according to the control spool sym-
bols and the related operating pressures and flows (see per-
formance limits on page 10).

TB P A
8109
7
4
5
1
11 2
6
Hydraulics Bosch Rexroth AGRA 22049-VE1-B1 M-.SED 6...VE1... 5/16
Function, section, control spool symbols: 4/2 directional seat valve
Type M-4SED 6 Y1X/350C...N9VE1Z2
Using a sandwich plate, the Plus-1 plate, under the 3/2 direc-
tional 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 con-
trol spool (4) on the seat (11). Port P is blocked and A con-
nected to T. I addition, 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:
When the main valve is operated, the control spool (4) is
shifted against the spring (5) and pressed onto the seat (7).
Thereby, 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 (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".
Important:
To prevent pressure intensification in conjunction with
differential cylinders, the annulus area of the cylinder
must be connected to A.
The use of the Plus-1 plate and the seat arrangement offer
the following options:
Control spool symbol "D" Control spool symbol "Y"
ATBP
TP
A
57411
12
9108
Schematic illustration: Initial position
3/2 directional
seat valve
Plus-1 plate

6/16 Bosch Rexroth AG Hydraulics M-.SED 6...VE1... RA 22049-VE1-B1
Throttle insert
The use of a throttle insert is required when due to prevail-
ing operating conditions, flows can occur during the switching
processes, which exceed the performance limit of the valve.
Examples:
– Accumulator operation;
– Use as pilot control valve with internal pilot fluid tapping.
3/2 directional seat valve (see page 4)
The throttle insert is inserted into
port P of the seat valve.
4/2 directional seat valve (see page 5)
The throttle insert is inserted into
port P of the Plus-1 plate.
Check valve insert
The check valve insert allows free flow from P → A and clos-
es A → P in a leak-free way.
3/2 directional seat valve (see page 4)
The check valve insert is inserted into port P of the
seat valve.
4/2 directional seat valve (see page 5)
The check valve insert is inserted in
port P of the Plus-1 plate.
PP
Function, section: Throttle insert, check valve insert
Technical data
general
Installation position Any
Ambient temperature range °C –20 … +60
Storage temperature range °C +15 … +30
Admissible vibration load 20 … 2000 Hz amplitude 0.05 g2/Hz (10 g RMS)
Weight 3/2 directional seat valve kg 3.1
4/2 directional seat valve kg 3.9
Surface protection Galvanic coating
hydraulics
Maximum operating pressure bar See table on page 10
Maximum flow l/min 25
Hydraulic fluid Mineral oil (HL, HLP) according to DIN 51524 1); Rapidly
biodegradable hydraulic fluids according to VDMA 24568
(see also RE 90221); HETG (rape seed oil) 1); HEPG (poly-
glycols) 2); HEES (synthetic esters) 2);
Other hydraulic fluids upon request
Ignition temperature > 180 °C
Hydraulic fluid temperature range °C –20 ... +80 (for NBR seals)
–15 ... +80 (for FKM seals)
Viscosity range mm2/s 2.8 … 500
Maximum permitted degree of contamination of the hydraulic
fluid cleanliness class according to ISO 4406 (c) Class 20/18/15 3)
1) Suitable for NBR and FKM seals
2) Suitable only for FKM seals
3) The cleanliness classes specified for the components must
be adhered to in hydraulic systems. Effective filtration
prevents faults and at the same time increases the life
cycle of the components. For the selection of the filters see
www.boschrexroth.com/filter.

Hydraulics Bosch Rexroth AGRA 22049-VE1-B1 M-.SED 6...VE1... 7/16
Technical data
1) Surface temperature > 50 °C, provide contact protection.
Switching times t in ms (installation position: Solenoid horizontal)
Pressure p
in bar
Flow qV
in l/min
DC solenoid
Control spool symbols UK, CK, D and Y
ton toff
without tank pressure UK D
UK CK D Y CK Y
70 25 50 45 55 50 10 10
140 25 65 45 70 50 10 15
210 25 75 55 80 60 10 15
280 25 90 55 95 60 15 20
315 25 95 55 100 60 15 20
350 25 100 55 105 60 20 25
electric
Voltage type Direct voltage
Available voltages V 24, 110
Voltage tolerance (nominal voltage) % –5 / +10
Admissible residual ripple % < 5
Duty cycle / operating mode according to VDE 0580 100 % / S1 (continuous operation)
Switching time according to ISO 6403 See table below
Switching frequency 1/h up to 15000
Nominal power at ambient temperature 20 °C W 17
Maximum power with 1.1 x nominal voltage and ambi-
ent temperature 20 °C W 20.6
Protection class according to NEMA 250 NEMA TYPE 4 1)
1) If the electrical connection is correctly installed.
Area of application according to NEC 505 Class I, Zone 1
Maximum surface temperature 1)
Temperature class
°C 135
T4
Type of protection of the valve solenoid according to
ANSI / ISA 60079-7
ANSI / ISA 60079-18
AEx e mb IIC T4 Gb
FM certificate 3044741
Ambient temperature range °C –20 … +60
Special conditions for safe use The maximum temperature of the valve casing surface
is 125 °C. This has to be considered when selecting the con-
nection cable and contact of the connection cable with the
casing surface is to be prevented.
Information on the explosion protection

8/16 Bosch Rexroth AG Hydraulics M-.SED 6...VE1... RA 22049-VE1-B1
Electrical connection
The type-tested valve solenoid of the valve is equipped with
a terminal box and a type-tested cable gland.
Important
When establishing the electrical
connection, the protective earth-
ing conductor (PE ) has to be
connected properly.
The connection is polarity-independent.
Properties of the connection terminals and mounting elements
Item Function Connectable line cross-section
1 Operating voltage connection Single-wire 0.75 … 2.5 mm2
Finely stranded 0.75 … 1.5 mm2
2 Connection for protective earthing conductor Single-wire max. 2.5 mm2
Finely stranded max. 1.5 mm2
3 Connection for potential equalization conductor Single-wire 6 mm2
Finely stranded 4 mm2
4 Screws for cover –
5 Plug screw –
Connection line
Line type Non-armored cables and lines (outer sheath sealing)
Temperature range °C –20 … > +100
2
3
1 45
Adapter with internal thread
NPT1/2"