The Standard for Reliable Protection up to 6 kW

The main requirement of a beam stopper is a reliable acting stop mechanism.
The 79.3 Beam Stopper Insert version provide reliable protection from energy radiation in UHV and XHV applications. The beam power load of the stop mechanism with a water-cooled copper plate is up to 6 kW at beam diameters > 60mm and up to 5 kW at diameters < 60mm. The specific load is max. 25W/mm².

To address UHV and EHV requirements the 79.3 has a one-piece water-cooling guide with no welding or soldering seam between the water supply and the vacuum. A non-cooled version is available as well.

The 79.3 is pneumatic actuated. The standard bake out temperature is max. 250°C for the beam stopper body and max. 80°C for the actuator (optional max. 200°C). The bonnet is metal sealed and the feedthrough sealed by a welded metal bellows.

Already proven in all leading energy beam facilities under various process conditions, the 79.3 Beam Stopper Insert series have become the standard for beam stopping.


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Closed

79.3 Beam Stopper Insert series is available in DN 63 - 160mm (2½” - 6”). The body material is stainless steel. The standard flange connector is CF-F. Customer specific flanges are an option, also additional ports for roughing (by-pass), venting or for gauges.

Standard time until first service is 5.000 cycles. If required an extended version of 50.000 cycles is available.


Key features of the 79.3 Beam Stopper

Features:

  • UHV and XHV compatible
  • One-piece water-cooling guide
  • Extended service free maintenance option

Benefits:

  • Proven technology
  • Extended service-free operation
  • Low cost of ownership
Technical data
Sizes   DN 100 (4"), DN 160 (6"), DN 200 (8")
Actuator Pneumatic Double acting
Body Material   Stainless Steel
Feedthrough   Bellows
Standard Flanges   CF-F
Leak Rate Beam stopper body < 1 × 10-10 mbar ls-1
Pressure Range   UHV to 1 bar (abs)
Cycles until first Service   5000 (Option: 50 000)
Bake-Out Temperature Beam stopper body ≤ 250°C
  Actuator ≤ 80°C (Option: 200°C)
Heating and Cooling Rate   ≤ 80 °C h-1
Material Beam stopper body AISI 304 (1.4301)
  Mechanism AISI 304 (1.4301)
  Bellows AISI 316L (1.4404)
  Watercooled plate Copper
Seal Bonnet Metal
Mounting Position   Any
Compressed air (Min.-Max. Overpressure)   4– 7 bar / 58 – 102 psi
Closing time DN 100
DN 160
2 s
3 s
Load Beam Ø <60 mm
Beam Ø > 60 mm
max. 5 kW
max. 6 kW
Specific load   max. 25 W / mm2
Cooling water Quanitity
Temperature
min. 15 l / min
< 15 °C

 

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