SUN HYDRAULICS
NEEDLE CARTRDGE
NFDDLGN
$49.74 USD
- SUN HYDRAULICS
- Material:NFDDLGN
- Model:NFDD-LGN
- Summary:Cartridge
Quantity in stock: 0
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics NFDDLGN (NFDDLGN) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This fully adjustable orifice allows for infinite adjustment from a completely closed position to the maximum orifice diameter, making it suitable for use as both a flow control and shutoff valve. The NFDDLGN model is not pressure compensated, meaning it regulates flow based on the square root of the pressure differential across its ports. It features a balanced adjustment mechanism that facilitates easy adjustments even under high-pressure conditions and incorporates a sharp-edged orifice design to minimize flow variations due to viscosity changes. The valve supports bidirectional flow, although the preferred flow path is from port 1 to 2 to maintain interchangeability with other flow controls. This needle valve exhibits no leakage when fully closed, ensuring reliable shutoff capabilities. It is compatible with systems using phosphate ester fluids when configured with EPDM seals; however, exposure to petroleum-based fluids can damage these seals. The NFDDLGN fits into cavity T-5A and offers a series 2 capacity of up to 50 gpm (200 L/min) at a maximum operating pressure of 5000 psi (350 bar). The adjustment range spans 5.5 counterclockwise turns from fully closed to open, with various installation torque specifications provided for optimal performance. Additionally, this model weighs approximately 0.60 lb (0.30 kg) and can be serviced with a Viton seal kit identified by part number 990203006.
The Sun Hydraulics NFDDLGN (NFDDLGN) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This fully adjustable orifice allows for infinite adjustment from a completely closed position to the maximum orifice diameter, making it suitable for use as both a flow control and shutoff valve. The NFDDLGN model is not pressure compensated, meaning it regulates flow based on the square root of the pressure differential across its ports. It features a balanced adjustment mechanism that facilitates easy adjustments even under high-pressure conditions and incorporates a sharp-edged orifice design to minimize flow variations due to viscosity changes. The valve supports bidirectional flow, although the preferred flow path is from port 1 to 2 to maintain interchangeability with other flow controls. This needle valve exhibits no leakage when fully closed, ensuring reliable shutoff capabilities. It is compatible with systems using phosphate ester fluids when configured with EPDM seals; however, exposure to petroleum-based fluids can damage these seals. The NFDDLGN fits into cavity T-5A and offers a series 2 capacity of up to 50 gpm (200 L/min) at a maximum operating pressure of 5000 psi (350 bar). The adjustment range spans 5.5 counterclockwise turns from fully closed to open, with various installation torque specifications provided for optimal performance. Additionally, this model weighs approximately 0.60 lb (0.30 kg) and can be serviced with a Viton seal kit identified by part number 990203006.
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 | T-5A |
| Series | 2 |
| Capacity | 50 gpm (.5 inch)200 L/min. (12,7 mm) |
| Maximum Operating Pressure | 5000 psi350 bar |
| Adjustment - Number of Counterclockwise Turns - Fully Closed to Fully Open | 55 |
| Valve Hex Size | 1 1/8 in.28,6 mm |
| Valve Installation Torque | 45 - 50 lbf ft61 - 68 Nm |
| Adjustment Screw Internal Hex Size | 5/32 in.4 mm |
| Locknut Hex Size | 9/16 in.15 mm |
| Locknut Torque | 80 - 90 lbf in.9 - 10 Nm |
| Model Weight | .60 lb0,30 kg |
| Seal kit - Cartridge | Viton: 990-203-006 |
Show FAQ
Additional Resources
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Sun Expands Corrosion-Resistant Solutions
- Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- Sun Cartridges with EPDM Seals
- Manufacturing Sun Cartridge Cavities
- Check, Flow Control, and Priority Flow Control Valves
- Fluid and Temperature Recommendations
- Sun's Floating Style Screw-In Cartridge
- Performance Data
- Sun Model Code Explanation; 999-901-334
- Units of Measure, Settings, and Conversions
- Cartridges: Materials of Construction
- Cavity Information (S-171) and Tooling
Notes:
- For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.