The Standard Sector Valve for Storage Rings in Accelerators and Synchrotrons

The 47.2 XHV RF All-Metal Gate Valve series is designed to bridge the space between the flanges in open valve position with an RF contact that matches the dimensions of the beam tube. In addition to the RF contact there is also electrical contact between the flanges. This guides the particle beam and the RF field with minimal losses through the valve.

In closed valve position these state-of-the-art all-metal valves deliver reliable isolation. This includes high radiation resistance (up to 108 Gy), high bake out temperature as well as a durable and reliable "hard on hard" sealing system.

The 47.2 XHV RF All-Metal Gate Valve series is equipped with VATRING sealing technology. This dynamic all-metal sealing system is capable of consistently reliable sealing and constant closing forces. It enables high sealing forces with comparable low axial forces. The sealing partners are made from stainless steel and they deform elastically only. The valve bake out temperatures can be up to 300°C, in open and closed position.

The all-metal valves are designed and tested for a lifetime of 10 000 cycles (DN 40mm - 160mm) and 5 000 cycles (DN 200mm). However, the sealing system is good for 100 000 leak-tight closures in a clean vacuum environment.

Already installed in nearly all accelerator and synchrotron facilities worldwide, the 47.2 series have proven their outstanding reliability. They set the standard for RF-valve applications.  

with compact actuator
with extended actuator


The valves are available from DN 40mm to DN 200mm (1 ½ ” - 8”). The standard flange is CF-F. The valve RF aperture is adapted to the customer beam profile. Nearly all beam tube shapes can be realized.

The distance between the gate body and the actuator can be extended to maximize the bake out temperature. Additional options include an anti-magnetic version with defined permeability, RF contact with low permeability material, different wave-guide executions, different solenoid and position indicator configurations as well as ports for roughing, venting or for gauges.  

Key features of the 47.2 XHV RF All-Metal Gate Valve


  • VATRING all-metal "hard on hard" sealing
  • Customer specific RF apertures
  • High radiation resistance
  • High modularity
  • Pneumatic actuation


  • Reliable performance under XVH conditions
  • No maintenance required within the specified life time
  • Field-proven technology
  • The world proven Standard for RF-valves
Technical data
Sizes   DN 40 (1½"), DN 63 (2½"), DN 100 (4"),
DN 160 (6"), DN 200 (8")
Actuator Pneumatic Double acting
Body Material   Stainless Steel
Feedthrough   Bellows
Standard Flanges   CF-F
Sealing technology   VATRING “hard on hard“ sealing
Leak Rate Valve Body < 1 × 10-10 mbar ls-1
  Valve Seat < 1 × 10-10 mbar ls-1
Pressure Range   XHV to 2 bar (abs)
Differential Pressure On the Gate ≤ 1 bar
  At Opening ≤ 500 mbar
Cycles until first Service DN 40 – 160
DN 200
10 000
5 000
Temperature Valve Body ≤ 300
  Pneumatic Actuator ≤ 200 °C
  Solenoid Valve ≤ 80 °C
  Position Indicator ≤ 80 °C (Option: 200 °C)
Heating and Cooling Rate DN 40 – 160
DN 200
≤ 50°C h-1
≤ 25°C h-1
Material Valve Body AISI 316L (1.4404, 1.4435)
  Mechanism AISI 316L (1.4404, 1.4435)
  Bellows AISI 316L (1.4435)
  RF Contact AISI 301 (1.4310), thermoresistant silver-coated
Seal Bonnet Metal
  Gate Metal
Mounting Position   Beam Line horizontal, otherwise any
Solenoid Valve   24 VDC, 2.5 W (others on request)
Position Indicator: Contact Rating Voltage ≤ 50 VAC/DC
  Current 80°C: ≤ 1.2 A 200°C: ≤ 1 A
Valve Position Indication   Visual (Mechanical)


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