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Model

NFDDLGN

Control
Maximum Orifice Diameter
Seal Material
Material/Coating

Fully adjustable needle valve

Cavity: T-5A | Capacity:

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Model

NFDDLGN

Control
Maximum Orifice Diameter
Seal Material
Material/Coating

Technical specifications

Needle valves are fully adjustable orifices used to regulate flow. They are infinitely adjustable from fully closed up to the maximum orifice diameter. They are not pressure compensated and may be used as flow controls or as shutoff valves.

  • All 2-port flow control cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size). However, cartridge extension dimensions from the mounting surface may vary.
  • Because needle valves are non-compensating devices, the fixed orifice size will regulate flow through the valve in proportion to the square root of the pressure differential across ports 1 and 2.
  • A balanced adjustment mechanism allows for easy adjustment even at high pressures.
  • The sharp-edged orifice design minimizes flow variations due to viscosity changes.
  • The flow path through this valve is bi-directional. The preferred path is port 1 to 2, to allow interchangeability with other flow controls.
  • There is no leakage when the adjustment mechanism is turned to the shut-off position.
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • Cavity
  • Series
  • Capacity
    50 gpm (.5 inch)
  • Maximum Operating Pressure
    5000 psi
  • Adjustment - No. of CCW Turns from Fully Closed to Fully Open
    5
  • Valve Hex Size
    1 1/8 in.
  • Valve Installation Torque
    45 - 50 lbf ft
  • Adjustment Screw Internal Hex Size
    5/32 in.
  • Locknut Hex Size
    9/16 in.
  • Locknut Torque
    80 - 90 lbf in.
  • Model Weight
    .60 lb
  • Seal kit - Cartridge
  • Seal kit - Cartridge
  • Seal kit - Cartridge

Model CAD Files

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Symbol CAD Files

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  • What parts of the Sun cartridge valve are field serviceable?
  • How big is a drop of hydraulic oil?  
  • For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.

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