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Centric Butterfly Valves - Triple Eccentric Design for Industry Applications

Explore the advantages of triple eccentric butterfly valves for various industrial uses, ensuring 100% tightness and long service life. Find out about construction characteristics, sizes, materials, and drive options.

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Centric Butterfly Valves - Triple Eccentric Design for Industry Applications

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  1. Welcome

  2. SUPPORTED MEDIA Gases -40’C - +80’C Steam to300’C Water to 200’C Condensate Glycol 100% Compressed air Steam 600’C Ice water -35’C - +200’C PN16 – PN100 CL150 - CL900

  3. 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

  4. 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.

  5. Butterfly valves BROEN „AK” • Supplement of BROEN’s offer for caseswhereare • no possibilities to useballvalves • Ranges of diameters to DN3000 • Standard of production: • AKW – betweenflange • AKFL – with flanged • AKBW – with weldedends • Differentversions of pressure: • PN25 – to DN 600 in stock • PN16, PN40, PN63 – for special order

  6. Constructions characteristics • Triple eccentric disc • Seal: lamellar metal/metal • Self-centering seat • Single body casted • 100% tightness to 425’C • Usage: • energetics • heating • industry

  7. Triple eccentric - flowchart 1 1 – eccentricmoving 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

  8. Advantages of triple eccentric design No friction between the sealing elements Low torque values Long life The tightness obtained by the torque of the drive The tightness of the variable temperature factor Perfect flow characteristics

  9. 6 2 3 5 4 1 The construction scheme Sizes: DN 80...3000 (in depending on PN) Pressure: PN 0,6...10 MPa

  10. Body • Forgedorcast • This solutioneliminatesthe risk of leakage between the elements of the body • The applicability of a variety of materials : • - carbonsteel WCB + 425oC • stainlesssteel AISI 304 + 600oC • AISI 316 + 600oC • Connectionstype : • flanged • type LUG • interflangedtypeWafer • welded

  11. 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

  12. 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

  13. 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 unusualdrilling

  14. Lamellasealing Constructed of several layers of stainless steel and graphite The minimum amount of the graphite extends the life Built in the body or on disk Construction of floating - adapts to disk The tightness achieved by closing torque Insensitive to changes in temperature and pressure

  15. Drive • Standard worm gear with handwheel • 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

  16. Electric drives • - torque 32…600.000Nm • - adjustable • close - open ( shut-off ) • AUMA • REMOTE CONTROL • CLORIUS • REGADA

  17. Pneumatic drive • - torque to 15.000Nm • - adjustable • close open • REMOTE CONTROL • CLORIUS

  18. Our projects : The National Stadium - Warszawa PGE Arena Baltic - Gdańsk National Forum of Music Wrocław District Heating Katowice – DN 900, DN 700 Airport Terminal - Gdańsk

  19. Referencje BROEN

  20. Butterfly type AKW

  21. Butterfly type AKFL

  22. Thank you for your attention.

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