Specifications:
The valve is designed for extreme Ultra High Vacuum (UHV) applications and is bakeable up to 300°C in both open and closed positions. It is maintenance-free, offers high conductance, and is radiation resistant up to 108 Gy. The valve features a manual actuator with a hexagon head.

Technical Data:
- Leak rate: body and valve seat < 1 · 10^-10 mbar l/s
- Pressure range: UHV to 2 bar (absolute)
- Differential pressure on the plate: 2 bar in either direction
- Differential pressure at opening: 1 bar (more than 1 bar with reduced cycle life)
- Molecular flow conductance: DN 16 / 40 / 63 - 5 / 50 / 105 l/s
- Lifetime: 1000 cycles
- Closing force: closing to stop
- Turns per stroke: DN 16: 6 / DN 40: 15 / DN 63: 9
- Temperature: valve ≤ 300°C
- Heating and cooling rate: ≤ 60°C per hour

Materials:
- Valve body and mechanism: AISI 304L (1.4306), AISI 316L (1.4435)
- Bellows: AISI 316L (1.4404)
- Seal: bonnet and plate are metal
- Body material: stainless steel

Mounting and Positioning:
- Mounting position: any
- Valve position: visual (mechanical)

Weight:
- DN 16 / 40 / 63: 0.4 / 2.2 / 6.2 kg (0.9 / 4.9 / 13.7 lbs)

Ordering Information:
DN sizes and corresponding ordering numbers are provided for different configurations with hexagon head handwheel and T-bar tool.

Accessories:
Handwheel or T-bar tool to put on hexagon head.

Design Features:
The valve includes the "Easy Close" all-metal angle valve Series 54 with a "FLEX VATRING" system where sealing elements are only elastically deformed. It closes to a mechanical stop, eliminating the need for a torque wrench, and features fixed rotatable flanges.

Dimensions:
Detailed dimensions are provided for DN 16, DN 40, and DN 63 sizes, including various measurements in millimeters and inches.