On-off valves, pneumatic HEP
Classic
The Festo HEP pneumatically piloted on-off valves are safety shut-off valves for compressed air distribution. The range comprises 12 versions in port sizes G 1/4 to G 1 (MINI, MIDI, MAXI) and opens or closes the compressed air supply via a pilot signal from the pneumatic circuit, requiring no electrical auxiliary power.
Pneumatic pilot control - opening and closing via pilot air pressure, no electrical power required
Port sizes G 1/4 to G 1 - MINI (1/4, 3/8), MIDI (1/4, 3/8, 1/2, 3/4), MAXI (1/2, 3/4, 1)
Fail-safe operation - valve closes automatically on pilot pressure loss
Classic system design - in-line mounting in Classic-range compressed air preparation groups
| Type | Port size | Frame size |
|---|---|---|
| HEP-1/4-D-MINI (193244) | G 1/4 | MINI |
| HEP-3/8-D-MINI (193245) | G 3/8 | MINI |
| HEP-1/4-D-MIDI (193250) | G 1/4 | MIDI |
| HEP-3/8-D-MIDI (193251) | G 3/8 | MIDI |
| HEP-1/2-D-MIDI (193252) | G 1/2 | MIDI |
| HEP-3/4-D-MIDI (193253) | G 3/4 | MIDI |
| HEP-1/2-D-MAXI (193258) | G 1/2 | MAXI |
| HEP-3/4-D-MAXI (193259) | G 3/4 | MAXI |
| HEP-1-D-MAXI (193260) | G 1 | MAXI |
Typical applications: ATEX zones and hazardous areas where electrical actuation is not permitted, safety shut-off in purely pneumatic control circuits, compressed air release via pilot valve in presses and clamping systems, and securing compressed air distributions without access to control voltage.
