Festo SE-3/8-B 9687 Quick Exhaust Valve G3/8

Festo SE-3/8-B is a quick exhaust valve for increasing piston return speed in single- and double-acting pneumatic cylinders. Screwed directly between the directional control valve and the cylinder, it shortens cycle times by exhausting air directly to the atmosphere at the cylinder port. Its die‑cast aluminium body with G3/8 female threads includes a built‑in silencer for quieter operation. The valve is intended for factory automation, packaging equipment, and general machine building where rapid cylinder retraction is required.

Applications:

• Double‑acting pneumatic cylinder return stroke

• Single‑acting cylinder rapid exhaust

• Material handling and packaging machinery

• Assembly lines and factory automation systems

Core Specifications:

• Valve function: Quick exhaust / rapid venting

• Pneumatic connections: Ports 1, 2 & 3 each G3/8 female thread

• Standard nominal flow rate (exhaust 6 → 0 bar): 2,760 l/min

• Standard nominal flow rate (pressurisation 6 → 5 bar): 2,880 l/min

• Operating pressure range: 0.2 … 10 bar

• Ambient / media temperature: –20 °C … +75 °C

• Nominal width: 11 mm

• Housing material: Die‑cast aluminium

• Seals material: NBR

• Built‑in silencer: Yes

• Product weight: 125 g

• Mounting type: Screw‑in (threaded)

• Mounting position: Any

System Integration:

• Belongs to Festo SE series of quick exhaust valves.

• Directly screws into cylinder port or valve outlet via G3/8 female threads (no bracket required).

• Compatible with Festo directional control valves, cylinders and accessories using G3/8 pneumatic connections.

• For maximum efficiency, place the valve as close as possible to the cylinder exhaust port.

Standards & Compliance:
ISO 8573‑1:2010 [7:-:-] for compressed air quality; RoHS compliant. For detailed certification information, refer to manufacturer official documentation.

Related Products (port size variants in SE series):

• SE‑1/8‑B (9685) – G1/8 ports, lower flow rate (1,280 l/min)

• SE‑1/4‑B (9686) – G1/4 ports (2,150 l/min at 6 bar)

• SE‑3/8‑B (9687) – current model

• SE‑1/2‑B (9688) – G1/2 ports (6,400 l/min at 6 bar)

• SEU‑3/8 (6755) – quick exhaust valve with enhanced noise reduction (different internal design)