Created on 06/15/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
NFDC
Fully adjustable needle valve
SERIES 2 / CAPACITY: 45 L/min. (6,4 mm) / CAVITY: T-5A
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. They may be used as flow controls or as
shutoff valves.
TECHNICAL DATA
Maximum Operating Pressure 350 bar
Adjustment - Number of Counterclockwise Turns - Fully Closed to Fully Open 5
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990-203-007
Seal kit - Cartridge Viton: 990-203-006
(L)CONTROL
L Standard Screw Adjustment
H Calibrated Handknob with Detent Lock
K Handknob
Y Tri-Grip Handknob
(A)MAXIMUM ORIFICE DIAMETER
A .25 in. (6,4 mm)
B .12 in. (3,0 mm)
(N)SEAL MATERIAL
N Buna-N
E EPDM
V Viton
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
/LH Mild Steel, Zinc-Nickel
snhy.com/
NFDC
TECHNICAL FEATURES
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 with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
PERFORMANCE CURVES
For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.
NOTES
Model Code Example: NFDCLANCONFIGURATION OPTIONS
Created on 06/15/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
