Flowzone Engineering Solution

Neles™ butterfly valve, series LW and LG

The Neles Neldisc series LW and LG valves with triple eccentric discs can function effectively in both control and shut-off applications, offering nearly proportional flow characteristics and exceptional sealing capability.

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Benefits

  • The process’s pressure loss and energy expenses are reduced to a minimum
  • The performance remains consistent, even under challenging and varying process conditions
  • Maintenance hours are kept to a minimum, allowing for quick

Features

  • The LW valve type is wafer-based, while the LG valve type is lug-based
  • Both types feature a triple offset design
  • The Model D includes a driveshaft with either a trunnion or through shaft
  • True metal-to-metal sealing ensures zero leakage
  • The pipeline uses a one-piece, full metal sealing system without any resilient parts
  • The valves boast high, long-lasting tightness
  • The patented S-disc feature delivers unique, industry-leading valve control
  • The modular design of the valves minimizes the inventory of spare parts, as the same spares can be used across multiple Neles Neldisc designs
  • The minimized actuator torque allows for a smaller actuator and reduced piping stress
  • BAM certification for gaseous oxygen is available as an option
  • The valves feature built-in thermal and pressure compensation
  • They have an extended rangeability of up to 90 degrees for control applications
  • The spare part inventory is optimized

Applications

  • Biotechnology
  • Geothermal applications
  • Pulp and paper
  • Water and wastewater
  • Refining
  • Oil and gas
  • Petrochemicals
  • ESD service
  • Industrial gas
  • Power generation
  • The valves are suitable for use in dirty and abrasive services

Specifications

Series
LW & LG (Model D)
LW & LG
Design
Wafer or lug
Wafer or lug
Size range
DN 80 – 300 / 3″ – 12″ (excluding DN 125/5″)
DN 80 – 600 / 3″ – 24″
Pressure classes
ASME 150 – 300, PN 10 – 40
ASME 150 – 300, PN 10 – 40
Temperature range
-50 °C … +600 °C / -46 °F…+1110 °F
-200 °C … +600 °C / -330 °F…+1110 °F

Downloads

  • Technical bulletin, Neldisc™ metal seated high performance triple eccentric disc valve series LW, LG
  • Technical bulletin, Neldisc™ metal seated high performance triple eccentric disc valve series LW, LG, US market only
  • Installation, maintenance and operation manual, series LW & LG
  • Technical bulletin, series LW & LG, Model D
  • Installation, maintenance and operation manual, series LW & LG Model D
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