Single Eccentric

Specification of "E" Series

The valve shall be capable of bi-directional flow and provide
Bubble tight shut-off at full rated pressure.

Type numbering system

• AV-EWR Disc Sealed WAFER type Butterfly valves
• AV-EFR Disc Sealed FLANGE type Butterfly valves

Standards compliance

• The face to face dimension in accordance with KS/JIS, BS, AWWA or other Standards are available upon request
• Valve body & disc of rubber lined are available according to customer's request
  

Production range

• SIZE : 80A (3inch)~4000A (160inch)
  
• WORKING PRESSURE : 0bar ~ 40bar
  
• WORKING TEMPERATURE : -20°C ~ +200°C
  

Applicable flange

• KS/JIS 10K, 16K, 20K
  
• ANSI B 16.1 Class 125LB
• ANSI B 16.5 Class 150LB
  
• BS 4504 PN10, PN16, PN25, PN30, PN40
  
• ISO 2084 PN10, PN16, PN25, PN30, PN40
• AWWA C207 Class D,E

The Single or Double Eccentric Design

CENTER OF SHAFT' in the 'Center of Valve Seat'
Applicable for butterfly valve with interchangeable soft seat.
Circular unbroken seats on disc and in body.
Simple maintenance.
Change of seat ring by dismantling of the retaining ring only.
Wide variety of seat materials available.
-Flow characteristics and pressure-drop less favourable than 'concentric design'
-Operating torque is higher than concentric design but substantially lower than double eccentric design
-The valve seat will be remained off position when the disc is fully  opened position.
Suitable for installation in Medium Range Pressure System (<30kg/㎠)
No limitation on corrosiveness of medium when proper seat material chosen.
Not suitable for FIRE SAFE requirement are applied.

Classification by Connection Type

Appearance	Type	General Charateristics
	AV-E Series AV-EWR(WAFER)	-General Applications     - water works, power plants, heating and ventilation,  Chemical plant Shipbuilding etc. -Valve to be installed with long bolts between the flanges at adjacent pipe without flange on the vlave. -Easy handling and light weight. -Easy installation, less bolt quantity and low cost. -Inconvenient maintenance of adjacent pipe.
	AV-E Series AV-EFR(FRANGED)	-General Applications - general piping works, power plants large diameter piping. -Both ends with complete flange. -Suitable to general pipe flange. -Suitable for large diameter piping -Heavy weight. -Same installation as ordinary valve.