When the Footprint Requires an Alternative to a Gate Valve 

The 21.0 Butterfly Valve provides the same reliable vacuum isolation that standard gate valves provide with the advantage of a lower footprint requirement. The butterfly principle combined with the compact actuator designs allows installations situations with very limited space.

In differential pressure conditions, the valve is fully operational.

Already installed in thousands of demanding applications under various process conditions, the 21.0 series has proven its outstanding reliability. With a robust design as well as reduced and easy maintenance, the 21.0 series convinces in all aspects.

The 21.0 Butterfly Valve has proved to be especially well suited as vacuum pump isolation valve.


VAT 21.0 Butterfly Valve - Closed
Closed
VAT 21.0 Butterfly Valve - Open
Open

21.0 Butterfly Valve series is available in stainless steel, with standard flange connectors in ISO-F for DN 63 - 160mm (2½” - 6”) as well as ISO-F and ISO-K flange connectors for DN 250mm (10”). Ports for roughing (by-pass), venting or gauges can be integrated.   

The sealing material for the bonnet and plate seal is FKM.


Key features of the 21.0 Butterfly Valve

Features:

  • Compact design
  • Operational under differential pressure
  • Reliable operation
  • Low maintenance

Benefits:

  • Small footprint
  • High up-time
  • Low cost of operation
Technical data
Sizes  DN 63 (2½"), DN 100 (4"), DN 160 (6"), DN 250 (10")
ActuatorPneumatic Double acting
 Manual With Turning Lever
Body Material  Stainless Steel
Feedthrough  Rotary
Standard Flanges DN 63 – 160ISO-F
  DN 250ISO-F, ISO-K
Leak RateValve Body < 1 × 10-9 mbar ls-1
 Valve Seat Manual Actuator < 5 × 10-9 mbar ls-1
 Valve Seat Pneumatic Actuator < 1 × 10-9 mbar ls-1
Pressure RangeManual ActuatorDN 63 1001 × 10-8 mbar to 4 bar (abs)
  DN 160, 2501 × 10-8 mbar to 1.3 bar (abs)
 Pneumatic ActuatorDN 63 2501 × 10-8 mbar to 1.3 bar (abs)
Differential Pressure on the GateManual ActuatorDN 63 – 100≤ 4 bar
  DN 160≤ 1.3 bar
 Pneumatic ActuatorDN 63 – 100≤ 1.3 bar
Differential Pressure at Opening  ≤ 1.3 bar
Cycles until first ServiceManual ActuatorDN 63 – 160100 000
 Pneumatic ActuatorDN 63, 2501 Million
  DN 100, 1601.5 Million
TemperatureValve Body ≤ 150 °C
 Actuator ≤ 80 °C
 Solenoid Valve ≤ 50 °C
 Position Indicator ≤ 80 °C
MaterialValve Body, Gate, Shaft AISI 304 (1.4301)
SealBonnet, Gate FKM
Mounting Position  Any
Solenoid Valve  24 VDC, 5.7 W, normally closed (NC)
(others on request)
Position Indicator: Contact RatingVoltage ≤ 50 VAC / 5 – 30 VDC
 Current 0.1 A

 

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