3/2-Way Solenoid Valve, Direct-acting Type 744

G 1/4 Advantages/Benefits

EEx ed IIC T4

Body material: brass,

stainless steel

Metal-sealed pressurized
parts

Push-over coil

High sealing capacity, even

with large temperature
fluctuations

Design/Function Applications

Type 744 is a direct-acting plunger- Single-phase bridge and varistor are • Valve to control pneumatic
type solenoid valve, normally clo- housed in a flameproof enclosure to cylinders or rotary actuators
sed by spring action (circuit func- protection classification “d”. • Handling systems in
tion C), or normally open by spring hazardous areas
action (circuit function D). Coil and terminal box correspond to • Separators
protection classification “e”, i.e. in- • Analytical devices
When energized, the solenoid ar- creased safety. • Offshore-technology
mature is drawn against a spring. • Petrochemical
The solenoid epoxy encapsulation • Dosing and mixing systems
The flow path through the valve is efficiently dissipates the heat gene- • Vacuum
dependent upon the chosen circuit rated by the coil.
function.

Fluid Control Systems

3/2-Way Solenoid Valve, Direct-acting Type 744

Technical Data

Circuit Function (The circuit functions A, B, D, E or F are developed from the valve in circuit function C by interchanging or
plugging the connections.)

C 3/2-way valve, when de-energized, D 3/2-way valve, when de-energized,

outlet A exhausted. outlet B pressurized.

A 2/2-way valve, normally closed. E Mixer valve, when de-energized,

pressure port P2 open, P1 closed.
B 2/2-way valve, normally open.
F 3/2-way distributor valve, when
de-energized, pressure port P
connected to outlet B.
Body Material
Brass, seat 1.4305 or 1.4410 (stainless steel) PTB-No. Ex-88.B.1049
Valve internals 1.4105, 14303

Specifications

1)
Orifice Kv-Value QNn-Value Pressure Range Weight
DN Water Air Circuit Function C
Gas Liquid
[mm] [m 3/h] [l/min] [bar] [bar] [kg]
2 0,11 120 0-16 0-12 0,9
3 0,20 200 0- 7 0- 2,5 0,9
4 0,40 320 0- 3,5 0- 1 0,9
1)
Also suitable for technical vacuum.

All pressures quoted are gauge pressures with respect to the prevailing atmospheric pressure.

Operating Data (Valve) Operating Data (Actuator)

Seal Materials / Fluids Handled / Temp.-Range Operating voltages 24, 110, 220, 240 V/UC
(universal current)
NBR Neutral fluids, e.g. compressed air, water,
hydraulic oil, oils and fat without additives, A bridge rectifier has been incorporated in the solenoid
town gas system, which makes it suitable for both direct and
-10 to +90 °C alternating current. (universal current to DIN 40700).

FPM Hot air, oxygen, per-solutions, hot oils, oils Voltage tolerance ±10 %
with additves. -10 to +90 °C
Power consumption 10 W
For more detailed information please refer to resistance
chart (Leaflet-No. 1896009). Rating IP 65

Max. ambient temperature +40°C

Max. viscosity 21 mm2/s

Port connection G 1/4

Response times opening approx. 80 ms

closing approx. 80 ms
Times measured at outlet A or B from switching on until
pressure rise to 90 % / pressure drops to 10 % at a max.
working pressure of 6 bar.
3/2-Way Solenoid Valve, Direct-acting Type 744

Installation / Accessories

Installation as required, but preferably with Safety fuse A safety fuse with a medium
solenoid system upright response time and rated
according to the nominal
Electrical connection • moulded-in cable HO5RN-F3 current should be incorporated
G, 3x 0,75 mm2, length 3 m, in the circuit.
with tension relieving cable
gland
• junction box on request

Valve Used as Different Circuit Functions

If used for another circuit function, the recommended operating pressures will vary according to the following chart:

Valve Version Max. operating pressure [bar] used in circuit function

Orifice Circuit
[mm] Function A B C D E F
2 C 16 25 16 2 2 25
3 C 7 11 7 1 1 11
4 C 3,5 6 3,5 0,5 0,5 6

Dimensions in mm

SW 22
M 14 x 1,5
18

53,5
43

100

3000
7

17
NPT 1/4
G 1/4

48 SW 22

34,5
12 bei G 1/4
10 bei NPT 1/4
74,5

11
Ø26

10,8

40

56

76
3/2-Way Solenoid Valve, Direct-acting Type 744

Ordering Chart (Other Versions on Request)

Circuit Orifice Flow Rate Port Pressure Body Seal Weight Voltage/ Order-No.
1)
Function Water Air Connection Range Material Material Frequency
DN Kv-Value QNn
[mm] [m 3 /h] [l/min] (ISO 228) [bar] [kg] [V/Hz]
2)
C 2,0 0,11 100 G 1/4 0-16 Brass NBR 0,9 024/UC 089 481 J
2)
110/UC 089 482 K
2)
220/UC 089 483 L
2)
240/UC 089 484 M
Stainless FPM 0,9 024/UC 076 334 X
110/UC 076 335 Y
220/UC 076 336 Z
240/UC 076 337 S

2)
3,0 0,20 200 G 1/4 0- 7 Brass NBR 0,9 024/UC 089 489 S
2)
110/UC 089 490 X
2)
220/UC 086 766 T
2)
240/UC 089 491 L
Stainless FPM 0,9 024/UC 076 339 C
110/UC 076 340 R
220/UC 076 341 E
240/UC 076 338 B

2)
4,0 0,40 400 G 1/4 0- 3,5 Brass NBR 0,9 024/UC 089 496 R
2)
110/UC 089 497 J
2)
220/UC 089 498 T
2)
240/UC 089 499 U
Stainless FPM 0,9 024/UC 076 342 F
110/UC 076 343 G
220/UC 076 344 H
240/UC 076 345 A
1) 2)
Also suitable for technical vacuum, Without mounting brackets. Lower pressure range for liquids (see specification chart on page 2).

Order-No. for Accessories

Safety Fuses [mA] Order-No.

24 V 1000 007 077 V

110 V 315 007 055 X
220/240 V 160 007 070 A

In case of special requirements We reserve the right to make technical 710-GB/ 2-0120
please consult for advice. changes without notice.