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Double flanged concentric butterfly valve

  • Port size:2″ to 88″,DN50-DN2000
  • Pressure:PN10-16 bar,150LB,JIS 5K 10K
  • Structure:Concentric
  • Medium:Water,air,etc.
  • Temperature :-29~120℃
  • Body material:Cast iron,ductile iron,carbon steel,stainless steel,etc.
  • Connection:Double flanged or others
  • Feature:Manual,electric,pneumatic actuator is optional
Double flanged concentric butterfly valve features a bonded liner extending over the flanges. The double flange concentric butterfly valve design is suitable for high pressure loading and for use in heavy industry, shipbuilding, severe vacuum applications and water treatment industry like potable water, water treatment and wastewater applications.

Double flanged concentric butterfly valve feature
1,ISO5211 top flange together with stem heat suitable for direct mounting of actuators
2,Stem anti-blowout design keep safety in field use
3,Bonded seat protects the body and shaft out of contact with medium
4,No exposed pins or bolts for stem-to-disc connection
5,Single flange mounting is possible
6,Can be installed in any desired position
7,Bubble-tight shut off at full pressure rating
8,Large flow capacity and enough strength

Double flanged concentric butterfly valve part list

Double flanged concentric butterfly valve

NO. Part name Material
1 Body ASTM A536 65-45-12, WCB, CF8M
Bonded with NBR or EPDM
2 Disc ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462
3 Stem SS420,SS431
4 Screw SS304
5 Retainer SS201
6 Weather seal NBR
7 Bearing RPTFE with Graphite on I.D.
8 Lower Stem SS420, SS431
9 Bottom cover Same as body
10 Bolt SS304
11 Screw SS304

Double flanged concentric butterfly valve specification

Body style Flange
Nominal diameter 2″ – 88″ (DN50mm – DN2000mm)
Top flange ISO5211
Operating pressure 16bar for DN50-DN300, 10bar for DN350-DN2200
Temperature range -20 °C to + 140 °C (depending on pressure, medium and material)
Flange accommodation EN 1092 PN 6/PN10/PN16
ASME Class 150AS 4087
PN10/ PN16JIS 5K/10K
Applications Potable Water, Wastewater, Seawater, HVAC
Operation Hand lever, gear box, pneumatic actuator, electric actuator