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QUADAX®
BUTTERFLY VALVES
FOR MAXIMUM EFFICIENCY

Thanks to four offset construction and state of the
art manufacturing technology, Quadax® valves offer
100% compliance even with the highest tightness
requirements. The innovative design principle means
that even extreme temperatures of –270°C to
+800°C are easy to handle.

The Quadax® butterfly valve is the optimum solution
for demanding customers with the highest tightness
requirements in the most extreme applications and
temperature ranges.

We produce the Quadax® butterfly valves from the
highest quality materials and on modern 5-axis
machining centres at our location in Germany.

THE DESIGN PRINCIPLE

CENTRIC BUTTERFLY VALVE

The turning point is in the centre of the seat and
in the centre of the pipe.
→ Only elastomer seals are possible.

 

 

SINGLE OFFSET BUTTERFLY VALVE

The turning point of the disc is offset along the
direction of the pipe.
→ 100 % friction between seat and seal
→ Increased torque and wear

 

 

DOUBLE OFFSET BUTTERFLY VALVE

The turning point of the disc is also offset from
the centre of the pipe towards the outer edge.
→ Approx. 30 % friction between seat and seal

 

 

TRIPLE OFFSET BUTTERFLY VALVE

The seat has a conical shape. The tip of the cone
is offset from the centre of the pipe towards the
outer edge. A circular cone results in an elliptical
narrow seat in the valve body.
→ Approx. 2-5 % friction between seat and seal

 

 

FOUR OFFSET BUTTERFLY VALVE

On the four offset butterfly valve, the output cone
used is elliptical. The section under a particular
angle results in a circular and therefore larger
sealing area.
→ Friction free
→ Higher Kv value
→ Highest tightness
(even under extreme conditions)

ADVANTAGES

INCREASED OPERATION SAFETY

– Totally friction free on seat
– Reduced risk of failure
– No wear on sealing area
– Longer service life

EXTREME TEMPERATURE RANGES

– Even wall thickness all
the way around
– Extreme temperatures
from –270°C to +800°C
– Large temperature differences
are easy to handle

REDUCED OPERATING COSTS

– Higher Kv/Cv values
– Lower pipe nominal
diameters
– Totally friction free
on sealing area
– Lower torques
Reduced maintenance costs

SUPERIOR TIGHNESS

– Highest tightness
requirements
– Bubble tight even in cryogenic
applications
– Innovative and patented
sealing design

SEALS

STANDARDS

  • 2014/68 EU Pressure Equipment Directive
  • DIN EN 12516 (DIN 3840)
  • ANSI B 16.34
  • AD 2000
  • AD W 10
  • BAM oxygen approval
  • Technical Instructions on Air Quality (TA Luft II)
  • ISO 15848
  • NACE MR 0175, NACE MR 0103
  • 2014/34/EU ATEX
  • Leak rate 1
    in compliance with DIN 3230 BA / BO / BN test
  • Leak rate A
    in compliance with DIN EN 12266
  • Tightness significantly exceeds BS 6364
  • Fire safe in both directions
  • in compliance with ISO10497, API 607, BS 6755
  • SIL 3