双偏心蝶阀采用倾斜式阀板设计，延长了使用寿命，且易于操作。阀板密封圈由HankFlow独有的EPDM橡胶加工而成，该橡胶通过饮用水认证，具有出色的回弹性能。环氧涂层表面均通过DVGW/WRAS认证，干轴设计确保高耐久性。该蝶阀为双向密封设计。
Double eccentric butterfly valve in 3 variations of sealing
• TG with PTFE+25% glass fibre seat
• TI Fire Safe
• IN with metal seat
Application fields: industrial and petrochemical range
Product features
• Body construction E1 Wafer, E3 Lug
• Face to face dimension according to ISO 5752/20, EN558-1/5, BS 5155/4
• Top flange according to EN ISO 5211
• Rating PN10/16/25/40, ANSI cl. 150
ANSI cl. 300 (DN50-300)
• Tightness TG/TI: Gas tightness according to EN
12266-1/P12 leakage rate A / API 598
IN: Gas tightness according to API 598
• ATEX option Execution according to ATEX 94/9/EC,Zone 1 and 21 – Gr II, Cat. 2 G/D
The butterfly valves ELARA meet the safety requirements of the pressure Equipments
Directive 97/23/EC (PED) appendix 1 for fluids of the groups 1 and 2.
Double eccentric function
The ELARA is a double eccentric butterfly valve. The double eccentricity results from
– Offset of the disc to the shaft (z 1) and
– Offset of the disc centre to the shaft (z 2).
Consequently, when opening, the disc is immediately disengaged from the seat and thus, the friction and the torque remain very low.
Fire Safe function
According to BS 6755 part 2
(Bureau Veritas – approval no. AIX3P00.0620J.3A)
1 Under normal working conditions, the tightness is done by the PTFE seat ring.
2 In case of fire, the PTFE seat ring is destroyed and the tightness is ensured by the metal seat ring.
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