Reliable Isolation Under Extreme UHV Conditions

The 48.2 UHV All-Metal Gate Valve series is designed for reliable isolation in UHV and XHV applications with high temperature environments at the valve of up to 300°C as well as for corrosive and condensing media. It can also resist radiation of up to 108 Gy.

These all-metal gate valves are designed for maximum conductance and they are equipped with VATRING "hard on hard" sealing technology. This dynamic all-metal sealing system is characterized by consistent 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 48.2 XHV All-Metal Gate Valve series are designed and tested for a lifetime of 20 000 cycles (DN 16 – 200mm) and 5 000 cycles (DN 250 – 320mm). However, the sealing system is good for 100 000 leak tight closures in a clean vacuum environment.

Already installed in thousands of demanding applications under various process conditions, the 48.2 series has proven its outstanding reliability.

Various design options in actuation, flange connections or additional vacuum ports make it easy to integrate the valves into any vacuum application.

with compact actuator
with extended actuator


A key feature is the "hard on hard" VATRING sealing system, also used in other well-known VAT all-metal valves.

The valves are available from DN 16 to DN 320mm (5/8” - 12”). The standard flange is CF-F.
The distance between the gate body and the actuator can be extended to maximize the bake out temperature of up to 300 °C, in open and closed position. Gates with windows as well as ports for roughing, venting or for gauges are also part of the various design options.  

Key features of the 48.2 XHV All-Metal Gate Valve


  • Maximum conductance
  • VATRING all-metal "hard on hard" sealing
  • High temperature and radiation resistance
  • Pneumatic and manual actuation


  • Reliable performance under XVH conditions
  • No maintenance required within the specified life time
  • Field-proven technology
  • Low cost of ownership
Technical data
Sizes   DN 63 (2½"), DN 100 (4"),
DN 160 (6")
Actuator Manual With handwheel
  Pneumatic Double acting
Body Material   Stainless Steel
Feedthrough   Bellows
Standard Flanges   CF-F
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   ≤ 2 bar
Differential Pressure at Opening DN 63 – 250 ≤ 500 mbar 1)
Cycles until first Service DN 16 – 200
DN 250 – 320
20 000
5 000
Temperature Valve Body ≤ 300
  Manual Actuator ≤ 140°C (Option: 200°C)
  Pneumatic Actuator ≤ 200 °C
  Solenoid Valve ≤ 80 °C
  Position Indicator ≤ 80 °C (Option: 200 °C)
Heating and Cooling Rate DN 16
DN 40 – 160
DN 200 – 320
≤ 80°C h-1
≤ 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)
Seal Bonnet Metal
  Gate Metal
Mounting Position DN 16 – 250
DN 320
On Request
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)

1) 1 bar with reduced number of cycles.

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