SUN HYDRAULICS
DSDDXEV
$231.23 USD
- SUN HYDRAULICS
- Material:DSDDXEV
- Model:DSDD-XEV
- 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 DSDDXEV (DSDDXEV) is a lowside hot oil shuttle cartridge designed for closed loop systems. This valve allows hot oil to be diverted from the low-pressure side, ensuring efficient thermal management in hydraulic circuits. It features a spring-centered mechanism that blocks all ports when pressures at work ports 2 and 4 are equal. When one port exceeds the other's pressure, the valve connects the lower-pressure port to the common port, port 3. A delay shift shuttle within the valve prevents flow transients downstream of the hot oil circuit by centering until a low side is established, then opening in a controlled manner after approximately two seconds. The valve remains centered as long as pressures at ports 2 and 4 exceed 300 psi (20 bar) plus the hot oil relief setting. For example, if this setting is at 200 psi (14 bar), the shuttle will not open unless transmission pressure drops below 500 psi (34 bar). The spool's hydraulic stop eliminates mechanical impact, reducing potential internal damage while providing a small pilot flow from high side work ports to port 3. This feature allows confirmation of the hot oil relief setting with the transmission in neutral. Although designed for a four-port cavity (T32A), it does not utilize nose port 1. The Sun floating style construction minimizes binding risks due to installation torque or machining variations. With a capacity of 20 gpm (80 L/min), maximum operating pressure of 5000 psi (350 bar), and pilot flow of .23 in\u00b3/min (.38 L/min), this valve is robust and stable, making it suitable for demanding applications requiring precise thermal management and pressure regulation in hydraulic systems.
The Sun Hydraulics DSDDXEV (DSDDXEV) is a lowside hot oil shuttle cartridge designed for closed loop systems. This valve allows hot oil to be diverted from the low-pressure side, ensuring efficient thermal management in hydraulic circuits. It features a spring-centered mechanism that blocks all ports when pressures at work ports 2 and 4 are equal. When one port exceeds the other's pressure, the valve connects the lower-pressure port to the common port, port 3. A delay shift shuttle within the valve prevents flow transients downstream of the hot oil circuit by centering until a low side is established, then opening in a controlled manner after approximately two seconds. The valve remains centered as long as pressures at ports 2 and 4 exceed 300 psi (20 bar) plus the hot oil relief setting. For example, if this setting is at 200 psi (14 bar), the shuttle will not open unless transmission pressure drops below 500 psi (34 bar). The spool's hydraulic stop eliminates mechanical impact, reducing potential internal damage while providing a small pilot flow from high side work ports to port 3. This feature allows confirmation of the hot oil relief setting with the transmission in neutral. Although designed for a four-port cavity (T32A), it does not utilize nose port 1. The Sun floating style construction minimizes binding risks due to installation torque or machining variations. With a capacity of 20 gpm (80 L/min), maximum operating pressure of 5000 psi (350 bar), and pilot flow of .23 in\u00b3/min (.38 L/min), this valve is robust and stable, making it suitable for demanding applications requiring precise thermal management and pressure regulation in hydraulic systems.
Low-side (hot oil) shuttle cartridges allow hot oil to be diverted from the low pressure side of a closed loop system. When both work ports (ports 2 and 4) are at equal pressures the valve is spring-centered to an all-ports-blocked position. When one of the work ports (port 2 or 4) sees a higher pressure the opposite work port is connected to the common port (port 3). The delay shift shuttle prevents flow transients downstream of the hot oil circuit.
- The valve is designed to center quickly and stay centered until conditions are correct for it to open as explained in the next 2 technical features.
- The valve prevents flow transients downstream of the hot oil relief in 2 ways. The shuttle stays centered until one side of the transmission actually becomes the low side. Once a low side has been established the valve opens in a controlled fashion after a delay of about 2 seconds.
- The valve centers and remains centered as long as pressures at ports 2 and 4 are both at or above a value equal to 300 psi (20 bar) plus the setting of the hot oil relief. For instance, if the hot oil relief is set at 200 psi (14 bar) the shuttle will not open unless one side of the transmission drops below 500 psi (34 bar).
- The spool incorporates a hydraulic stop that eliminates mechanical impact and therefore the potential for internal damage.
- The hydraulic stop results in a small pilot flow from the high side work port (port 2 or 4) to the common port (port 3).
- A unique feature due to the hydraulic stop is that the hot oil relief setting can be confirmed with the transmission in neutral.
- Although this valve goes into a 4-port cavity, the nose (port 1) is not used.
- 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-32A |
| Series | 2 |
| Capacity | 20 gpm80 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Pilot Flow | 23 in³/min.0,38 L/min. |
| Valve Hex Size | 1 1/8 in.28,6 mm |
| Valve Installation Torque | 45 - 50 lbf ft61 - 68 Nm |
| Model Weight | .70 lb0,30 kg |
| Seal kit - Cartridge | Viton: 990-032-006 |
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