SUN HYDRAULICS
NFFDYIN
$238.37 USD
- SUN HYDRAULICS
- Material:NFFDYIN
- Model:NFFD-YIN
- 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 NFFDYIN (NFFDYIN) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This fully adjustable orifice allows for infinite adjustment from fully closed to the maximum orifice diameter, making it suitable for use as both a flow control and a shutoff valve. The NFFDYIN model is not pressure compensated, meaning the flow regulation is dependent on the square root of the pressure differential across ports 1 and 2. This design includes a balanced adjustment mechanism that facilitates easy adjustments even under high-pressure conditions. The sharp-edged orifice minimizes flow variations due to changes in fluid viscosity, ensuring consistent performance. The valve features a bidirectional flow path, with the preferred direction from port 1 to 2 to maintain interchangeability with other flow controls. It ensures zero leakage when in the shutoff position, providing reliable sealing. For systems utilizing phosphate ester fluids, cartridges configured with EPDM seals are available; however, these seals are not compatible with petroleum-based fluids. This needle valve fits into cavity T-18A and belongs to Series 4, offering a capacity of up to 140 gpm (530 L/min) at a maximum operating pressure of 5000 psi (350 bar). The adjustment from fully closed to open requires approximately 5.5 counterclockwise turns. Installation requires a torque of 350\u2013375 lbf ft (474\u2013508 Nm), and it includes specific dimensions for installation tools such as an internal hex size of 5/32 inches (4 mm) for the adjustment screw and a locknut hex size of 9/16 inches (15 mm). The valve weighs approximately 3 pounds (1.35 kg), and Viton seal kits are available under part number 990018006 for maintenance needs.
The Sun Hydraulics NFFDYIN (NFFDYIN) is a versatile needle valve designed for precise flow regulation in hydraulic systems. This fully adjustable orifice allows for infinite adjustment from fully closed to the maximum orifice diameter, making it suitable for use as both a flow control and a shutoff valve. The NFFDYIN model is not pressure compensated, meaning the flow regulation is dependent on the square root of the pressure differential across ports 1 and 2. This design includes a balanced adjustment mechanism that facilitates easy adjustments even under high-pressure conditions. The sharp-edged orifice minimizes flow variations due to changes in fluid viscosity, ensuring consistent performance. The valve features a bidirectional flow path, with the preferred direction from port 1 to 2 to maintain interchangeability with other flow controls. It ensures zero leakage when in the shutoff position, providing reliable sealing. For systems utilizing phosphate ester fluids, cartridges configured with EPDM seals are available; however, these seals are not compatible with petroleum-based fluids. This needle valve fits into cavity T-18A and belongs to Series 4, offering a capacity of up to 140 gpm (530 L/min) at a maximum operating pressure of 5000 psi (350 bar). The adjustment from fully closed to open requires approximately 5.5 counterclockwise turns. Installation requires a torque of 350\u2013375 lbf ft (474\u2013508 Nm), and it includes specific dimensions for installation tools such as an internal hex size of 5/32 inches (4 mm) for the adjustment screw and a locknut hex size of 9/16 inches (15 mm). The valve weighs approximately 3 pounds (1.35 kg), and Viton seal kits are available under part number 990018006 for maintenance needs.
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-18A |
| Series | 4 |
| Capacity | 140 gpm (.85 inch)530 L/min. (21,6 mm) |
| Maximum Operating Pressure | 5000 psi350 bar |
| Adjustment - Number of Counterclockwise Turns - Fully Closed to Fully Open | 55 |
| Valve Hex Size | 1 5/8 in.41,3 mm |
| Valve Installation Torque | 350 - 375 lbf ft474 - 508 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 | 3.00 lb1,35 kg |
| Seal kit - Cartridge | Viton: 990-018-006 |
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Additional Resources
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- 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