Bürkert Type 8650 AirLINE Ex is a modular electrical and pneumatic automation system that controls complex processes in potentially explosive areas (Zones 1/21). The protection class "intrinsically safe" (Ex i) of electronic modules and valves allows modules to be replaced during operation.

Siemens Partnership

With the modules of the cooperation partner Siemens, Bürkert offers electrical, analogue and digital I/O functions for use in Zone 0 via the Siemens SIMATIC ET 200iSP™ module. Connection is available via PROFINET IO / PROFIBUS DP-is.

General Technical Data

Feature	Type 6524, Type 6525 (11 mm)	Type 6526, Type 6527 (16.5 mm)
Body Material	PA, PC, nickel-plated brass, stainless steel	PA, PC, brass nickel-plated, stainless steel
Seal Material	NBR	NBR
Width per station	11 mm	16.5 mm
Number of valve slots	Max. 48	Max. 32
Pressure range	Vac...8 bar	Vac...8 bar
Flow rate QNn value air	300 l/min	700 l/min
Operating voltage	Supply via ET 200iSP: 24 V DC	Supply via ET 200iSP: 24 V DC
Degree of protection	IP30	IP30

Explosion Protection

Approval	Description
ATEX	BVS 21 ATEX E 013 X II 2G Ex be ib IIC T4 Gb
IECEx	IECEx BVS 21.0013 X Ex be ib IIC T4 Gb

Pilot Valves

The pneumatic valves consist of an Ex i pilot solenoid valve and a pneumatic seat valve. The circuit function allows switching of high pressures with low power consumption and short switching times. The pilot valves are equipped with a manual override as standard.

Product Design and Assembly

The valve island acquires sensor signals via digital feedback inputs. As a result, pneumatic outputs switch single-acting or double-acting process valves in different modes of operation.

No.	Element	Pneumatic connections
1	Supply slice, left	G 3/8" (P + R/S) and G 1/8" (X)
2	Valve slice 44 mm	Plug-in coupling D6, D 1/4" (working ports)
3	Valve slice 66 mm	Plug-in coupling D8 (working ports)
4	Supply slice, right	G 3/8" (P + R/S) and G 1/8" (X)