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Address: NO.720, Suide Road, Jiading District,Shanghai, China.
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Lug type concentric butterfly valve

  • Port size:2″ to 24″,DN50-DN600
  • Pressure:PN10-16 bar,150LB,JIS 5K 10K
  • Structure:Concentric
  • Medium:Water,air,etc.
  • Temperature :-29~150℃
  • Body material:Cast iron,ductile iron,carbon steel,stainless steel,etc.
  • Connection:Lug type
  • Feature:Manual,electric,pneumatic actuator is optional
Lug type concentric butterfly valve designed with threaded lugs outside the body. These threaded lugs are used to contain bolts used to connect the valve to the pipeline. Lug type concentric butterfly valve is installed into the piping system by placing it in between two pipe flanges. A tight seal is enhanced by mounting a gasket between the mating surfaces of the valve and the pipe plus the bolts. Two separate bolt sets are used on each end of the valve without the use of nuts. This design makes the Lug type concentric butterfly valve work as an isolation valve or makes it suitable for installation in the end-of-line service. Such design makes it easy to dismantle one end of the valve without disturbing the other end which helps to reduce downtime when doing repair and maintenance. Lug type concentric butterfly valve manufacturers design this type of valve with short lengths making it economical relative to other valves. Also, this short length helps the bolts to extend from one pipe flange to the other flange across the lug-style butterfly valve. 

Lug type concentric butterfly valve feature
1: ISO5211 top flange together with stem square suitable for direct mounting of actuators
2: Stem anti-blowout design keep safety in field use
3: Dirtscraper prevents moisture penetrating into the shaft area
4:Multi-standard alignment holes suitable for various standard of flanges of EN1092 PN10, PN16, ASME B16.5 CLASS150, JIS B2239 10K, 16K, BS 10 Table D, Table E
5: Suitable for high pressure and full vacuum service due to the use of a cartridge seat design
6: No exposed pins or bolts for stem-to-disc connection
7: No need for flange gaskets
8: No risk of damage to the valve during installation in closed position
9: Bubble-tight shut of at full pressure rating
10: Large flow capacity and enough strength because of streamline disc design
11: Plug with O-ring sealing eliminates any leakage from the stem

Lug type concentric butterfly valve part list

NO. Part name Material
1 Body ASTM A536 65-45-12, WCB, CF8M
2 Disc ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462
4 Stem SS420,SS431
5 Lower Stem SS420,SS431
6 Retainer Nylon for DN50-DN300, SS304 for DN350-DN2000
7 Bearing RPTFE with Graphite on I.D.
8 Weather seal NBR
9 Nuts Stainless steel
10 Plug Steel galvanized for DN50-DN300, Cover plate for
DN350-DN2000 material same as body with SS304 bolts
11 Screw SS304

Lug type concentric butterfly valve specification

Body style Flange
Nominal diameter 2″ – 24″ (DN50mm – DN600mm)
Top flange ISO5211
Operating pressure 10-16bar
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