BURKERT 20087662 Type 8644 is a 12-bank pneumatic valve island configured with 11 mm station width and twelve 2x 3/2-way valve slices (valve function C C). Designed for process automation systems, the unit mounts directly onto a standard DIN rail and provides internal bus communication combinable with Wago I/O systems. Pneumatic connections include a G 1/4 supply connection and bottom-oriented D6 push-in working ports on the pneumatic module.

Technical Specifications

Parameter	Specification
Article Number	20087662
Type Family	8644
Hardware Generation	Revision 2
Valve Function	12x (2x 3/2) valve function C C
Station Width	11 mm
Number of Stations	12
Supply Connection	G 1/4
Working Port Size	D6
Working Port Position	Bottom (pneumatic module)
Intermediate Feed Quantity	1 PCE
Nominal Pressure Range	2.5 bar to 10 bar
Medium Temperature Range	0 °C to 50 °C
Ambient Temperature Range	0 °C to 55 °C
Mounting Type	DIN-rail installation
Internal Bus Communication	Combinable with Wago
Modular Variant	Without (due to block structure)
Ingress Protection	IP20 (max. with suitable connection)

Pneumatic Configuration and Features

BURKERT 20087662 integrates specific pneumatic protection and maintenance features within its block assembly:

• Integrated Check Valves: Built into exhaust ports 3 (R) and 5 (S) to prevent back-pressure intrusion and cross-talk between actuators.
• Pneumatic HotSwap: Supported in pressure supply channel 1 (P), allowing valve replacement under operating pressure without system shutdown.
• Intermediate Supply Feed: Includes 1 intermediate feed piece to support flow distribution across the 12 valve stations.

Pressure and Temperature Boundaries

The valve island operates within a nominal pressure range of 2.5 bar to 10 bar. Permissible medium temperatures range from 0 °C to 50 °C, and ambient environmental temperatures must remain between 0 °C and 55 °C.

Installation and Compatibility

BURKERT Type 8644 (Revision 2) utilizes DIN-rail mounting. The internal bus communication architecture allows direct combination with Wago control hardware. With appropriate electrical and pneumatic mating connections, the system achieves an IP20 ingress protection rating.