SUN HYDRAULICS
DKDR8HN
$125.29 USD
- SUN HYDRAULICS
- Material:DKDR8HN
- Model:DKDR-8HN
- 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 DKDR8HN (DKDR8HN) is a precision-engineered hydraulic valve designed for high-pressure applications up to 5000 psi or 350 bar. This normally closed, balanced poppet valve features an integral T8A control cavity, which when paired with a 2-way valve, allows for controlled switching between open and closed states based on pilot pressure and control valve status. The valve requires a minimum pilot pressure of 400 psi (approximately 30 bar) to shift, ensuring stable operation under various conditions. Key to its reliable performance is the unique balanced construction of the DKDR8HN, which ensures predictable switching and minimal leakage\u2014typically less than 10 drops per minute at maximum pressure. This design effectively seals ports 1 and 2 from ports 3 and 4, maintaining strict separation and preventing cross-contamination between different hydraulic lines. Additionally, any backpressure at the drain port directly adds to the required pilot pressure, enhancing the operational reliability of the valve. The DKDR8HN also incorporates Sun Hydraulics' floating style construction which minimizes potential internal binding caused by excessive installation torque or variations in cavity/cartridge machining. This feature is critical in maintaining long-term durability and consistent performance of the valve in demanding industrial settings. For installation, Sun Hydraulics recommends specific torque values for both the main stage valve and the T8A pilot control valve to ensure secure fitting without compromising functionality. The model supports a flow capacity of up to 15 gpm (60 L/min), making it suitable for a wide range of fluid dynamics applications within hydraulic systems. This versatile design coupled with robust construction makes the DKDR8HN an essential component for sophisticated hydraulic setups requiring precise control over fluid flow and pressure modulation.
The Sun Hydraulics DKDR8HN (DKDR8HN) is a precision-engineered hydraulic valve designed for high-pressure applications up to 5000 psi or 350 bar. This normally closed, balanced poppet valve features an integral T8A control cavity, which when paired with a 2-way valve, allows for controlled switching between open and closed states based on pilot pressure and control valve status. The valve requires a minimum pilot pressure of 400 psi (approximately 30 bar) to shift, ensuring stable operation under various conditions. Key to its reliable performance is the unique balanced construction of the DKDR8HN, which ensures predictable switching and minimal leakage\u2014typically less than 10 drops per minute at maximum pressure. This design effectively seals ports 1 and 2 from ports 3 and 4, maintaining strict separation and preventing cross-contamination between different hydraulic lines. Additionally, any backpressure at the drain port directly adds to the required pilot pressure, enhancing the operational reliability of the valve. The DKDR8HN also incorporates Sun Hydraulics' floating style construction which minimizes potential internal binding caused by excessive installation torque or variations in cavity/cartridge machining. This feature is critical in maintaining long-term durability and consistent performance of the valve in demanding industrial settings. For installation, Sun Hydraulics recommends specific torque values for both the main stage valve and the T8A pilot control valve to ensure secure fitting without compromising functionality. The model supports a flow capacity of up to 15 gpm (60 L/min), making it suitable for a wide range of fluid dynamics applications within hydraulic systems. This versatile design coupled with robust construction makes the DKDR8HN an essential component for sophisticated hydraulic setups requiring precise control over fluid flow and pressure modulation.
This is a normally closed, balanced poppet, switching element with an integral T-8A control cavity. With a 2-way valve in the closed position installed in the T-8A control cavity, the poppet remains closed. Opening the 2-way valve shifts the poppet to the open position, provided there is sufficient pressure at port 3.
- Unique balanced construction provides predictable switching with 5000 psi (350 bar) at port 1 and port 2. Switching will only occur when both a minimum pilot pressure of 400 psi (30 bar) is present and pilot control valve is open.
- These valves are hydraulically balanced between port 1 and port 2.
- Port 1 and port 2 are fully sealed from port 3 and port 4. Ports 3 and 4 are positively sealed.
- Any backpressure at the drain port is directly additive to the required pilot pressure for reliable operation.
- Leakage rate between port 1 and port 2 is very low, typically less than 10 drops/min. at 5000 psi (0,7 cc/min at 350 bar).
- Valve will reseat when the pilot pressure falls below 145 psi (10 bar).
- NOTE: With the -8 control option, the main stage valve should first be installed to the correct torque value. The T-8A pilot control valve should then be installed into the main stage valve to its required torque value.
- The -8 control option allows the pilot control valve to be incorporated directly into the end of the logic cartridge via the T-8A cavity. These pilot control cartridges are sold separately and include electro-proportional, solenoid, air pilot, and hydraulic pilot operation. See Pilot Control Cartridges.
- All ports will accept 5000 psi (350 bar).
- 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-21A |
| Series | 1 |
| Capacity | 15 gpm60 L/min. |
| Minimum Pilot Pressure Required to Shift Valve | 400 psi28 bar |
| Maximum Operating Pressure | 5000 psi350 bar |
| Control Pilot Flow | See Performance DataSee Performance Data |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 10 drops/min.@5000 psi0,7 cc/min.@350 bar |
| Pilot Control Cavity | T-8AT-8A |
| Pilot Control Valve Installation Torque | 20 - 25 lbf ft27 - 33 Nm |
| Pilot Control Valve Hex Size | 7/8 in.22,2 mm |
| Valve Hex Size | 7/8 in.22,2 mm |
| Valve Installation Torque | 30 - 35 lbf ft41 - 47 Nm |
| Model Weight | .35 lb0,15 kg |
| Seal kit - Cartridge | Viton: 990-021-006 |
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