SUN HYDRAULICS
PPFCAKV

$251.67 USD

SUN HYDRAULICS
Material:PPFCAKV
Model:PPFC-AKV
Summary:Cartridge

Quantity in stock: 0

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***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 PPFCAKV (PPFCAKV) is an air-controlled, pilot-operated pressure reducing-relieving valve designed to use compressed air over a diaphragm for setting control instead of an adjustable spring. This valve efficiently reduces a high primary pressure at inlet port 2 to a consistent reduced pressure at port 1, while also providing a full-flow relief function from port 1 to tank port 3. The air signal, supplied through a port in the hex-end of the cartridge, ensures that the hydraulic setting is directly proportional to the air setting at a ratio of 20:1 hydraulic:air. It is important to note that full reverse flow from reduced pressure port 1 to inlet port 2 may close the main spool; therefore, adding a separate check valve may be necessary if reverse free flow is required in the circuit. The valve's minimum setting is determined by the pressure at port 3 and should not exceed 1000 psi (70 bar), with an adjustment range between 50 and 1500 psi (3.5 to 105 bar). The maximum allowable air pressure is capped at 150 psi (10.5 bar) due to diaphragm strength limitations, and the pressure differential from inlet to outlet should not surpass 3000 psi (210 bar). As pilot-operated valves are inherently slower acting, direct-acting valves might be considered for applications requiring superior dynamic response. The air control feature offers explosion-proof remote control capabilities. The PPFCAKV model incorporates Sun's floating style construction, which minimizes internal parts binding due to excessive installation torque or machining variations. Its cavity size is T-2A Series with a capacity of up to 20 gpm (80 L/min), and it has specific installation requirements such as torque settings and hex sizes for adjustments and locknuts. This design ensures reliable performance in various hydraulic applications where precise pressure regulation and relief are critical.

Description

Air-controlled, pilot-operated pressure reducing/relieving valves use compressed air over a diaphragm instead of an adjustable spring to control the setting. These 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). The air signal is supplied through a port in the hex-end of the cartridge and the hydraulic setting is directly proportional to the air setting at a ratio of 20:1 (hydraulic:air).

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.
The pressure at port 3 determines the minimum valve setting and should not exceed 1000 psi (70 bar).
The full adjustment range is 50 to 1500 psi (3,5 to 105 bar).
Maximum air pressure should not exceed 150 psi (10,5 bar) due to the strength of the diaphragm.
Maximum pressure differential, inlet to outlet, should not exceed 3000 psi (210 bar).
Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.
The air control feature allows explosion proof remote control.
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.
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.
Pilot Ratio	20:120:1
Maximum Operating Pressure	2000 psi140 bar
Control Pilot Flow	10 - 15 in³/min.0,16 - 0,25 L/min.
Maximum Air Pressure	150 psi10,5 bar
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	.50 lb0,25 kg
Seal kit - Cartridge	Viton: 990-202-006

Show FAQ

What are the tolerances on pressure settings for Sun's pressure control valves?	Pressure setting tolerances are listed in our Performance Data page. A link to this page can also be found in the Additional Resources tab of the applicable product page.
I need a reducer on B. Can I connect the drain to A?	Yes. If you look in the sandwich section you will see that we offer many such packages. When you are pressurizing B, A is connected to tank, allowing the reducer to do its job. When you reverse, the drain or tank port of the reducer is pressurized by A. This increases the setting of the reducer and helps keep the reducer open in the reverse flow direction.
What do you mean by maximum differential?	Our reducing valves are outside-in valves; the supply pressure on the outside of the working parts is higher than the inside. At some pressure differential, the outside (sleeve) will close in on the piston and cause the valve to stick. A D range is adjustable from 25 to 800 psi with a maximum differential of 2000 psi. This means you could set the valve at 600 psi and expect it to work correctly with a supply pressure of 2600 psi. The valve may work at higher differentials, but we do not recommend it. The W and C ranges are tested over their entire range with an inlet pressure of 5000 psi. All direct-acting valves are tested with an inlet pressure of 5000 psi.
Will your reducing/relieving valve relieve my pump to tank?	No. A reducing/relieving valve throttles a supply of oil to maintain a set pressure in a secondary circuit. The valve is open until the secondary or downstream pressure rises to the setting of the valve at which time it starts to close to limit the pressure. If the secondary or downstream pressure is caused to go above the setting, the valve shifts into relieving mode and throttles the secondary circuit back to tank to prevent over-pressure. At no time can the valve connect the supply to tank.
How big is a drop of hydraulic oil?	There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Direct acting or pilot operated - what do I use?	Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.
Can I back flow through a reducing valve from port 1 to port 2?	Yes. A reducing or reducing/relieving valve is normally open. If the pressure in the secondary circuit is less than the setting, it will be open.2 caveats: (1) If the valve is in the reducing mode and you suddenly reverse the flow, the valve will not have time to open and will shift into relieving mode or (2) If the back flow generates a pressure drop through the valve that exceeds the setting, the valve will shift into the relieving mode.When in doubt, use a reverse flow check.

SUN HYDRAULICSPPFCAKV

Additional Resources

SUN HYDRAULICS
PPFCAKV