Main Features
The Valve Mechanism and Pump-out Port System, Series 23.0, is designed to prevent unintentional opening and can be used with multiple pump-out ports. It features a self-locking handwheel actuator and is constructed from aluminum for the valve mechanism and stainless steel for the pump-out port. The system is compatible with ISO-KF standard flanges and is suitable for infrequently pumped vacuum vessels or gas isolation.

Components
1. Valve mechanism
2. Retaining device
3. Retaining pin on shaft
4. Pump-out port
5. Plate
6. Plate seal
7. Isolating plug
8. Plug-in shaft head / hexagon
9. Feedthrough seal
10. Bonnet seal
11. Clamping ring
12. Centering ring with O-ring

Technical Specifications
- Size: DN 16 – 40 mm (⅝" – 1½")
- Leak rate: 1 · 10^-8 mbar ls^-1 to < 1 · 10^-9 mbar ls^-1
- Pressure range: 1 · 10^-8 mbar to 1 bar (abs)
- Temperature: Valve body ≤ 150 °C, Handwheel ≤ 50 °C
- Material: Valve body (EN AW-6060), Shaft and Plate (AISI 304)
- Seal: FKM (Viton®) for bonnet, feedthrough, and plate
- Mounting position: Any
- Stroke: DN 16, 25 (75 mm), DN 40 (107 mm)
- Unobstructed flow diameter: DN 16 (2.5 mm), DN 25 (8.0 mm), DN 40 (18.0 mm)
- Weight: DN 16 (0.35 kg), DN 25 (1 kg), DN 40 (1.2 kg)

Ordering Information
Valve mechanisms and pump-out ports are available in sizes DN 16, 25, and 40 with specific ordering numbers for each size.

Accessories
Flange connections for installation are available in series 31.