Neles Easyflow™ resilient seated butterfly valve, series JA

Premium performance product


Neles Easyflow JA series concentric disc resilient seated butterfly valves are suitable for a wide range of applications in manual or automated on/off through throttling control services. Although compact and lightweight, the JA series is designed to be rugged, reliable, and to comply with a variety of global industry standards.

Long cycle life

Various materials of construction available for wide range of applications

Easy to maintain

Designed for control service with two-piece stem for highest Cv


  • ISO 5211 mounting pad for direct mounting of handle, gear operator, manual override, or actuator
  • An extremely tight fit square drive between the stem and disc provides accurate and repeatable shut-off and control
  • Bonded elastomeric cartridge seal is the most rugged method of construction available, providing consistent operating torque, maximum cycle life, and higher flow rates in control. Avoids pinching and tearing that can occur with non-bonded seal designs.
  • Bonded elastomeric cartridge seal is easy to remove and replace if maintenance is ever needed
  • Disc is precision machined with a spherical disc edge to provide long cycle life and consistent torque
  • Two-piece stem arrangement for highest Cv and maximum flow
  • Top and bottom stems have anti blow-out protection that also prevents lifting or pushing of the disc during actuator installation or removal
  • Lower stem includes groove for easy servicing
  • The burnished stem is supported by self lubricating polymer bearings to minimize deflection and provide smooth operation and long life
  • Every valve is factory tested, serialised & quality tagged prior to shipment


  • Water and waste water
  • Sewage treatment
  • Mining and other slurries
  • Fuel oil and gas
  • Cooling or chilled water circuits
  • Desalination
  • HVAC
  • Cement and other fine powders
  • Mild corrosive chemicals and petrochemicals


Nominal diameter:

DN50 – DN600 (NPS 2 – 24)

Pressure rating:

PN10, PN16, Class 150

Flange accommodation:

EN1092 (PN10, PN16)

  ASME B16.5 Class 150
  AS 2129 Table D & E  
  Refer to flange table for availability by size

Face to face dimension:

Per API 609 Table 2 for Category A


BS EN 558 Table 2 Series 20 valves

Vacuum rating:

29.91 inch Hg gauge (759.98 mm Hg gauge or 2x10-2 Torr or 4x10-4 psia or 99.99% vacuum)


No visible leakage

Standards followed:

ISO 5211, API 598, API 609, ASME B16.5, BS EN 593 IS 13095, AS 2129  


API 598, EN 12266-1