Triple eccentric butterfly valves

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SUPPORTED MEDIA
Gases
-40’C - +80’C
Steam to300’C
Water to 200’C
Condensate
Glycol 100%
Compressed
air
Ice water
-35’C - +200’C
Steam 600’C
PN16 – PN100
CL150 - CL900
Why butterflies?
Comparison of butterflies DN 200; PN25; with other fittings:
Weight:
Length:
Height :
Moment:
Ball valve
140 kg
400 mm
285 mm
> 800 Nm
Bellow valve
170 kg
600 mm
800 mm
Gate valve
105 kg
230 mm
670 mm
Butterfly
60 kg
71 mm
550 mm
750 Nm
For valves and bellow valves the need to use expensive multiturns drivers
Centric butterfly valves PN6....16:
Soft seal NBR; EPDM, PTFE; Silikon; Viton
Or without seal – leakage about 1% kv for hard seated version
Single eccentric butterfly valves : PN6...25
Only soft seal available NBR; EPDM; PTFE; Viton
Double eccentric butterfly valves : PN6...40(50)
Soft seal NBR; EPDM; PTFE; Viton
Seal metal-metal
Triple eccentric butterfly valves : PN6...100
Only hard seal, metal/metal. There is no trafic friction during opening and
Closing of the butterfly valve. The disc loses contact with the seat immediately after the start of opening.
This construction minimizes the torque valve, guarantees 100% tightness and long life of the seal.
Butterfly valves BROEN „AK”
 Supplement of BROEN’s offer for cases where are
no possibilities to use ball valves
 Ranges of diameters to DN3000
 Standard of production:
• AKW – between flange
• AKFL – with flanged
• AKBW – with welded ends
 Different versions of pressure:
• PN25 – to DN 600 in stock
• PN16, PN40, PN63 – for special order
Constructions characteristics
•
•
•
•
•
•
Triple eccentric disc
Seal: lamellar metal/metal
Self-centering seat
Single body casted
100% tightness to 425’C
Usage:
– energetics
– heating
– industry
Triple eccentric - flowchart
1
1 – eccentric moving the shaft
relative to the axis of the sealing
surface
2
a
3 - eccentric – the conical shaped
sealing surface with the cone axis
shifted by the „α „ angle
2 - eccentric – axis displacement of the
shaft relative to the axis of the throttle
Advantages of triple eccentric design
1.
No friction between the sealing
elements
2. Low torque values
3.
Long life
4. The tightness obtained by the torque
of the drive
5. The tightness of the variable
temperature factor
6. Perfect flow characteristics
The construction scheme
6
2
3
5
4
1
No.
Description
Carbon
Cast
Alloy
1
Body
WCB
WC6
CF8
CF8M
2
Ring
WCB
304
304
316
3
Disk
WCB
304
304
316
4
Seat
420
420
304
316
5
Shaft
A276
420
A276
420
A182
F304
A182
F316
6
Gland
inserts
Aplication :
Temperature oC
Stainless steel
graphite
Oil ; water ; steam
-29..+425
-29.+530
aggressive media
-196...+600oC
Sizes: DN 80...3000 (in depending on PN)
Pressure:
PN 0,6...10 MPa
Body
Forged or cast
This solution eliminates the risk of leakage between the elements of the
body
The applicability of a variety of materials :
- carbon steel
WCB
+ 425oC
- stainless steel AISI 304 + 600oC
AISI 316 + 600oC
Connections type :
1. flanged
2. type LUG
3. interflanged type Wafer
4. welded
Disk
Forged or casted
The sealing surface hardened
The applicability of various
materials:
- carbon steel
- stainless steel
Rigidly mounted on a single shaft
with by means of pins
The two-piece shaft option.
Shaft with keyway
for diameters up to DN250
possible square
Shaft
One piece design
of stainless steel:
-AISI 420 standard
-AISI 304
-AISI 316
-other materials on request
- double bearing
- maintenance-free bearings
- self-lubricating
standard bronze alloys
- optional stainless steel
Shaft seal
- Gland seal graphite inserts
- gland seal mounted on pins and
needles with nuts
Mounting the drive :
- Basis with drilling wg ISO 5211
- possibility of making unusual drilling
Lamella sealing
1. Constructed of several layers of
stainless steel and graphite
2. The minimum amount of the
graphite extends the life
3. Built in the body or on disk
4. Construction of floating - adapts to
disk
5. The tightness achieved by closing
torque
6. Insensitive to changes in
temperature and pressure
Drive
Standard worm gear with hand wheel
Option:
Electric drive
- Close and open
- adjustable
Pneumatic drive
-unilateral action
- two-sided action
- with wheel for manual action
- adjustable i close and open
Hydraulic drive
Electric drives
- torque 32…600.000Nm
- adjustable
- close - open ( shut-off )
- AUMA
-REMOTE CONTROL
-CLORIUS
-REGADA
Pneumatic drive
- torque to 15.000Nm
- adjustable
- close open
-REMOTE CONTROL
-CLORIUS
Our projects :
The National Stadium Warszawa
District Heating Katowice –
DN 900, DN 700
PGE Arena Baltic - Gdańsk
National Forum of
Music Wrocław
Airport Terminal - Gdańsk
Referencje BROEN
Butterfly type AKW
Butterfly type AKFL
Thank you for your
attention.
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