Hafner Pneumatic’s quick-exhaust blocks are designed for fast operation of single- and double-acting actuators, with 1/4" and 1/2" NAMUR interfaces.
They ensure that only the compressed air used to open the actuator enters the spring chamber. The integrated non-return valve also prevents ambient air from being drawn into the actuator, protecting the spring chamber from contaminants in the surrounding air.
Options to suit your application:
✔ 316L stainless steel versions
✔ Explosion-Proof / ATEX versions
✔ Rated for temperatures down to -50°C (-50°F)
The new datasheet covers all available product variants.
Download it below, and reach out if you'd like some help selecting the right version for your application.

Modular valve terminal system with different control modules:
Specifications
Series 403 - 4 mm- 450 Nl/min
Series 503 - 5 mm - 650 Nl/min
Temperature: -10°C to 80°C (14°F to 176°F)
Pressure: 44 to 145 psi
Voltage: 24VDC, with LED and surge protection
Power consumption: 1,8 Watt
IP Protection: IP 55


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