SUN HYDRAULICS
PVHDLAN

$354.23 USD

SUN HYDRAULICS
Material:PVHDLAN
Model:PVHD-LAN
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 PVHDLAN (Material Number: PVHDLAN) is a ventable, pilot-operated pressure reducing/relieving valve designed to manage hydraulic systems by reducing a high primary pressure at the inlet to a consistent, reduced pressure at port 1. It features a full-flow relief function from port 1 to tank port 3 and includes a vent port (port 4) that allows for remote control via pilot or two-way valves. The valve's main stage orifice is drilled into the piston, enhancing its durability in demanding applications. With exceptionally flat pressure-flow characteristics and low hysteresis, this valve offers stable performance with minimal deadband transition between reducing and relieving modes. The recommended maximum inlet pressure varies by adjustment range, with ranges C and W tested up to 5000 psi (350 bar). It is important 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 Sun floating style construction minimizes potential internal binding due to excessive installation torque or machining variations. This model has a capacity of 40 gpm (160 L/min) and operates with control pilot flow between 15-20 in\u00b3/min (0.25-0.33 L/min). Installation requires specific torque settings for optimal performance: Valve Installation Torque is between 150-160 lbf ft (203-217 Nm), Adjustment Screw Internal Hex Size is ^5/32 in., Locknut Hex Size is ^9/16 in., and Locknut Torque ranges from 80-90 lbf in. This valve weighs approximately 1.30 lb (0.60 kg) and utilizes Viton seal kits for cartridge sealing needs.

Description

Ventable, pilot-operated pressure reducing/relieving valves reduce a high primary pressure at the inlet to a constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3). The vent port (port 4) can be used as a means for remote control by pilot or 2-way valves.

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).
Pilot operated valves exhibit very low dead-band transition between reducing and relieving modes.
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.
By controlling the pressure at the vent (port 4), the effective setting of the valve can be controlled below the nominal valve setting.
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-23A
Series	3
Capacity	40 gpm160 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	15 - 20 in³/min.0,25 - 0,33 L/min.
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	1 1/4 in.31,8 mm
Valve Installation Torque	150 - 160 lbf ft203 - 217 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	1.30 lb0,60 kg
Seal kit - Cartridge	Viton: 990-023-006

Show FAQ

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.
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.

SUN HYDRAULICSPVHDLAN

Additional Resources

SUN HYDRAULICS
PVHDLAN