SUN HYDRAULICS
PPFFOWN
$138.30 USD
Tags:
- SUN HYDRAULICS
- Material:PPFFOWN
- Model:PPFF-OWN
- 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 PPFFOWN (PPFFOWN) is a pilot-operated pressure reducing-relieving valve designed to reduce a high primary pressure at the inlet port 2 to a consistent reduced pressure at port 1, with a full-flow relief function from port 1 to tank port 3. This valve features a main stage orifice drilled directly into the piston, enhancing its durability for physically demanding applications. The valve ensures stability and low hysteresis with its exceptionally flat pressure-flow characteristics. It is crucial to note that the pressure at port 3 adds directly to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar). The maximum recommended inlet pressure varies by adjustment range: Ranges D, E, N, and Q are tested with up to a 2000 psi (140 bar) differential, while Ranges A, B, and H allow for up to 3000 psi (210 bar), and Ranges C and W can handle up to 5000 psi (350 bar). The PPFFOWN model incorporates Sun's floating style construction to minimize internal part binding due to excessive installation torque or machining variations. It is adjustable throughout its full range using W or Y controls unless specified otherwise. For applications requiring reverse flow from reduced pressure port 1 to inlet port 2, it is recommended to add an external check valve as the main spool may close under such conditions. This model is not fast-acting; for superior dynamic response, direct acting valves are suggested. Additionally, all three-port cartridges are interchangeable within their frame size regarding flow path and cavity dimensions.
The Sun Hydraulics PPFFOWN (PPFFOWN) is a pilot-operated pressure reducing-relieving valve designed to reduce a high primary pressure at the inlet port 2 to a consistent reduced pressure at port 1, with a full-flow relief function from port 1 to tank port 3. This valve features a main stage orifice drilled directly into the piston, enhancing its durability for physically demanding applications. The valve ensures stability and low hysteresis with its exceptionally flat pressure-flow characteristics. It is crucial to note that the pressure at port 3 adds directly to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar). The maximum recommended inlet pressure varies by adjustment range: Ranges D, E, N, and Q are tested with up to a 2000 psi (140 bar) differential, while Ranges A, B, and H allow for up to 3000 psi (210 bar), and Ranges C and W can handle up to 5000 psi (350 bar). The PPFFOWN model incorporates Sun's floating style construction to minimize internal part binding due to excessive installation torque or machining variations. It is adjustable throughout its full range using W or Y controls unless specified otherwise. For applications requiring reverse flow from reduced pressure port 1 to inlet port 2, it is recommended to add an external check valve as the main spool may close under such conditions. This model is not fast-acting; for superior dynamic response, direct acting valves are suggested. Additionally, all three-port cartridges are interchangeable within their frame size regarding flow path and cavity dimensions.
Pilot-operated, pressure reducing/relieving valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3).
- These valves have the main stage orifice drilled into the piston rather than a staked-in orifice. This allows the valve to survive physically demanding applications.
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar).
- Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
- Recommended maximum inlet pressure is determined by the adjustment range. Ranges D, E, N, and Q are tested with a 2000 psi (140 bar) maximum differential between inlet and reduced pressure. Ranges A, B, and H are tested with a 3000 psi (210 bar) maximum differential between inlet and reduced pressure. Ranges C and W are tested with 5000 psi (350 bar) of inlet pressure.
- Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
- Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
- If pilot flow consumption is critical, consider using direct acting reducing/relieving valves.
- All three-port pressure reducing and reducing/relieving cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size). When considering mounting configurations, it is sometimes recommended that a full capacity return line (port 3) be used with reducing/relieving cartridges.
- Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.
- W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve.
- Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.
Cavity | T-2A |
Series | 2 |
Capacity | 20 gpm80 L/min. |
Factory Pressure Settings Established at | blocked control port (dead headed)blocked control port (dead headed) |
Maximum Operating Pressure | 5000 psi350 bar |
Control Pilot Flow | 10 - 15 in³/min.0,16 - 0,25 L/min. |
Adjustment - Number of Clockwise Turns to Increase Setting | 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: 990-202-006 |
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- Units of Measure, Settings, and Conversions
- Sun Model Code Explanation; 999-901-334
- Cavity Information (S-171) and Tooling
- Cartridges: Materials of Construction
- Fluid and Temperature Recommendations
- Performance Data
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.