SUN HYDRAULICS
DMDALRN297
$258.33 USD
- SUN HYDRAULICS
- Material:DMDALRN297
- Model:DMDA-LRN@297
- 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 DMDALRN297 (DMDALRN297) is a high-performance solenoid-operated 3-way, 2-position cartridge valve. It features a direct-acting, balanced spool design that ensures reliable operation without the need for minimum hydraulic pressure. This model is particularly notable for its fatigue rating of 5000 psi (350 bar), making it suitable for demanding applications. The valve operates with a fast and consistent response time due to its closed transitions between Spools B and R, which are designed to remain closed during the switching process. This valve supports a maximum flow capacity of 12 gpm (45 L/min) and can handle up to 15000 switching cycles per hour, highlighting its capability for high-frequency operation. The manual override feature requires a force of 5 lbs at 1000 psi on Port 1, and includes a detent mechanism in models equipped with D or L control, primarily intended for temporary actuation. The mechanical life expectancy of the manual control assembly is approximately 7,000 cycles. Designed with EPDM seals, the DMDALRN297 is intended for use with phosphate ester fluids; exposure to petroleum-based fluids can damage these seals. Its wet armature design allows the working fluid to surround the armature which helps in heat dissipation but requires consideration of fluid characteristics as some may degrade under prolonged exposure to heat. Additionally, this model incorporates Sun\u2019s floating style construction which minimizes internal parts binding caused by excessive installation torque or variations in cavity/cartridge machining. It also features interchangeable coils with other Sun Series 1 solenoid products and offers flexibility in mounting orientation on the tube. With such robust specifications and versatile design features, the DMDALRN297 is equipped to deliver reliable performance across various applications requiring precise hydraulic control.
The Sun Hydraulics DMDALRN297 (DMDALRN297) is a high-performance solenoid-operated 3-way, 2-position cartridge valve. It features a direct-acting, balanced spool design that ensures reliable operation without the need for minimum hydraulic pressure. This model is particularly notable for its fatigue rating of 5000 psi (350 bar), making it suitable for demanding applications. The valve operates with a fast and consistent response time due to its closed transitions between Spools B and R, which are designed to remain closed during the switching process. This valve supports a maximum flow capacity of 12 gpm (45 L/min) and can handle up to 15000 switching cycles per hour, highlighting its capability for high-frequency operation. The manual override feature requires a force of 5 lbs at 1000 psi on Port 1, and includes a detent mechanism in models equipped with D or L control, primarily intended for temporary actuation. The mechanical life expectancy of the manual control assembly is approximately 7,000 cycles. Designed with EPDM seals, the DMDALRN297 is intended for use with phosphate ester fluids; exposure to petroleum-based fluids can damage these seals. Its wet armature design allows the working fluid to surround the armature which helps in heat dissipation but requires consideration of fluid characteristics as some may degrade under prolonged exposure to heat. Additionally, this model incorporates Sun\u2019s floating style construction which minimizes internal parts binding caused by excessive installation torque or variations in cavity/cartridge machining. It also features interchangeable coils with other Sun Series 1 solenoid products and offers flexibility in mounting orientation on the tube. With such robust specifications and versatile design features, the DMDALRN297 is equipped to deliver reliable performance across various applications requiring precise hydraulic control.
This solenoid-operated 3-way, 2-position cartridge is a direct-acting, balanced spool directional valve.
- The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.
- Spools B and R are closed in the transition between their two positions. This results in a higher performance limit at the expense of lower capacity. When used as pilot controls, where capacity is not a factor, the closed transition will provide faster and more consistent response times.
- This valve is direct actuated and requires no minimum hydraulic pressure for operation.
- On models equipped with the D or L control, the detent mechanism in the manual override is meant for temporary actuation. The D, L and T manual control assembly has a mechanical life expectancy of approximately 7,000 cycles.
- 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.
- This valve utilizes a wet armature design. This means that the working fluid surrounds the armature and is exposed to the heat generated by the coil. This can be a factor if the coil is energized for long periods of time. Some fluids, notably water/glycol mixtures, break down at these temperatures over time and form varnishes that will affect the function of the cartridge.
- Coils are interchangeable with other Sun Series 1 solenoid products and can be mounted on the tube in either direction.
- 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-11A |
| Series | 1 |
| Capacity | 12 gpm45 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Response Time - Typical | 50 ms50 ms |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 5 in³/min.@3000 psi80 cc/min.@210 bar |
| Switching Frequency | 15000 cycles/hr15000 cycles/hr |
| Manual Override Force Requirement | 5 lbs/1000 psi @ Port 133 N/100 bar @ Port 1 |
| Manual Override Stroke | .10 in.2,5 mm |
| Solenoid Tube Diameter | .75 in.19 mm |
| Valve Hex Size | 7/8 in.22,2 mm |
| Valve Installation Torque | 30 - 35 lbf ft41 - 47 Nm |
| Model Weight | .60 lb0,30 kg |
| Seal kit - Cartridge | Viton: 990-411-006 |
| Seal and nut kit - Coil | Viton: 990-770-006Viton: 990-770-006 |
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