Product Size and RatedPressure???                    
Wafer & Lug Butterfly Valve???
CLASS 150 (PN20)   NPS 3-48(DN80-1200)
CLASS 300 (PN50)   NPS 3-36(DN80-900)
CLASS 600 (PN100) NPS 3-24(DN80-600) 

Design Standrad???MSSSP-68,API 609
 Top Flange Standrad: ISO 5211
Connection Standrad: ANSI/ASME B16.5,ANSI/ASME B16.47,
                                   ISO 7005, EN 1092,BS 4504,MSS SP-44,
Face to Face???API 609,MSS SP-68,ISO 5752,EN 558-1
Test and Inspection???API 598,MSS SP-61,BS 5146
Fire Safe Testing ???API 607,BS 6755  

Design Features:

1.Bearing assemblysupports shaft,reduce abrasion and torque.

2.Packing gland istwo-section design to prevent shaft jamming due tooffsetting.

3.PTFE,reinforced PTFE,orUhmewpe seat is featured of excellent elasticity,reliableperformance and easy maintenance.

4.Unique sealing designcan compensate the change of temperature andpressure.

Bi-direction bubble-tightclosure, longe service life and low maintenance. Seat replacementis achieved only through dismantling the insert without removingthe disc.

5.Double offsetconstruction design.Disc produces minimum abrasion duringopening/closing, resulting in long seat service life and allowingeasy operation with minimum torque.

6.Fire safedesign.