Type 8640

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1.2. Solenoid valves Type 6524 and Type 6525

• The pilot valves Type 6524  (single and double valve) and Type 6525  (single valve) consist

of a pilot flipper solenoid valve Type 6144 and a pneumatic seat valve.

• The operating principle allows switching of high pressures with low power consumption and

short switching times.

• The pilot valves are equipped with a manual override as standard.

• The pneumatic flange pattern of the pilot valves Type 6524 and 6525 (single valves) for

Type 8640 REV3 has been standardised. There is a difference to the flange pattern of the pilot

valves for Type 8640 REV2. It is therefore imperative to take into account the different article

numbers of the pilot valves as described in chapter “9.3. Ordering chart replacement valves”

on page 23.

• Further information about ordering information can be found in chapter “9.3. Ordering chart

replacement valves” on page 23.

• Further information about further valve options can be found in chapter “9.4. Ordering chart

accessories” on page 27.

Pilot valve Type

Type 6524, Type 6525

Type 6524

Circuit function

3/2 and 5/2-way valve

2 × 3/2-way valve

Product properties

Materials

Body

PA (polyamide)

Seal

FKM, NBR and PUR

Width per station

11 mm

Manual override

Standard

Pneumatic module

With plug-in coupling, Ø 6 mm, Ø ¼"

Performance data

Pressure data

Overpressure to atmospheric pressure

Flow rate Q

Nn value air

Measured at + 20 °C, 6 bar pressure at valve inlet and 1 bar difference pressure, see “9.3.

Ordering chart replacement valves” on page 23.

Duty cycle

Continuous operation (100 % duty cycle)

Switching time

Measured according to ISO 12238

Electrical data

Operating voltage

24 V DC (10 % residual ripple permissible)

Nominal power of each valve

0.8 W

2 × 0.8 W with reduction of power

Medium data

Operating medium

Oil-free or lubricated compressed dry air, neutral gases (5 μm filter recommended)

Process/Port connection & communication

Service port 2 (A), 4 (B)

Plug-in coupling Ø 6 mm, Ø ¼"

Air supply connection

1 (P), 3 (R), 5 (S)

G ¼

Electrical connection (on valve)

Rectangular plug, 2-pin, grid spacing 5.08 mm

Cable with strands 1.)

Rectangular plug, 3-pin, grid spacing 2.54 mm

Cable with strands 1.)

Environment and installation

Installation position

As required, preferably with actuator upright

Mounting condition

With 2 screws M2 × 20

With 2 screws M2 × 28

1.) Versions with safety-related shutdown. The switching contact must be located in the same control cabinet as the valve block. The line length must be limited to a maximum of 2 m.