SUN HYDRAULICS
NFDDHGN
$65.62 USD
- SUN HYDRAULICS
- Material:NFDDHGN
- Model:NFDD-HGN
- 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 NFDDHGN (Material Number: NFDDHGN) is a needle valve designed for precise flow regulation in hydraulic systems. It features a fully adjustable orifice, allowing for infinite adjustment from fully closed to the maximum orifice diameter. This model is not pressure compensated, making it suitable for use as a flow control or shutoff valve. The valve's 2-port flow control cartridges are physically and functionally interchangeable, ensuring compatibility with other similar products. It operates on the principle that the fixed orifice size regulates flow proportionally to the square root of the pressure differential across ports 1 and 2. The balanced adjustment mechanism facilitates easy adjustments even under high pressure conditions, while the sharp-edged orifice design minimizes variations due to changes in fluid viscosity. The NFDDHGN model supports bidirectional flow, with a preferred path from port 1 to port 2 for interchangeability with other controls. It guarantees no leakage when turned to the shutoff position. This model is configured with EPDM seals, making it ideal for systems using phosphate ester fluids; however, exposure to petroleum-based fluids should be avoided to prevent seal damage. Key specifications include a maximum capacity of 50 gpm (200 L/min) at an operating pressure of up to 5000 psi (350 bar). The valve features an adjustment range of up to 5.5 counterclockwise turns from fully closed to open, and its installation requires specific torque values for both the valve and locknut components. With a compact weight of .60 lb (.30 kg), this needle valve is engineered for robust performance in demanding applications where precise fluid control is essential.
The Sun Hydraulics NFDDHGN (Material Number: NFDDHGN) is a needle valve designed for precise flow regulation in hydraulic systems. It features a fully adjustable orifice, allowing for infinite adjustment from fully closed to the maximum orifice diameter. This model is not pressure compensated, making it suitable for use as a flow control or shutoff valve. The valve's 2-port flow control cartridges are physically and functionally interchangeable, ensuring compatibility with other similar products. It operates on the principle that the fixed orifice size regulates flow proportionally to the square root of the pressure differential across ports 1 and 2. The balanced adjustment mechanism facilitates easy adjustments even under high pressure conditions, while the sharp-edged orifice design minimizes variations due to changes in fluid viscosity. The NFDDHGN model supports bidirectional flow, with a preferred path from port 1 to port 2 for interchangeability with other controls. It guarantees no leakage when turned to the shutoff position. This model is configured with EPDM seals, making it ideal for systems using phosphate ester fluids; however, exposure to petroleum-based fluids should be avoided to prevent seal damage. Key specifications include a maximum capacity of 50 gpm (200 L/min) at an operating pressure of up to 5000 psi (350 bar). The valve features an adjustment range of up to 5.5 counterclockwise turns from fully closed to open, and its installation requires specific torque values for both the valve and locknut components. With a compact weight of .60 lb (.30 kg), this needle valve is engineered for robust performance in demanding applications where precise fluid control is essential.
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 |
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Additional Resources
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- Sun Cartridges with EPDM Seals
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Sun Expands Corrosion-Resistant Solutions
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- Manufacturing Sun Cartridge Cavities
- Check, Flow Control, and Priority Flow Control Valves
- Units of Measure, Settings, and Conversions
- Cartridges: Materials of Construction
- Cavity Information (S-171) and Tooling
- Fluid and Temperature Recommendations
- Sun's Floating Style Screw-In Cartridge
- Performance Data
- Sun Model Code Explanation; 999-901-334
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.