SUN HYDRAULICS
DOFR8HV
$178.80 USD
- SUN HYDRAULICS
- Material:DOFR8HV
- Model:DOFR-8HV
- 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 DOFR8HV (Material Number: DOFR8HV) is a normally open, balanced poppet switching element featuring an integral T8A control cavity. It is engineered to maintain the poppet in an open position when a 2-way valve is closed within the T8A control cavity. The poppet shifts to a closed position when the 2-way valve opens, contingent upon sufficient pressure at port 3. This component exhibits unique balanced construction, offering predictable switching at pressures up to 5000 psi (350 bar) at ports 1 and 2. Switching occurs only when a minimum pilot pressure of 400 psi (30 bar) is present and the pilot control valve is open. The valve will reopen when pilot pressure drops below 145 psi (10 bar). Ports 1 and 2 are fully sealed from ports 3 and 4, ensuring positive sealing at these points. A notable feature is its low leakage rate between ports 1 and 2, typically less than ten drops per minute at full pressure. The design incorporates Sun\u2019s floating style construction to reduce binding risks due to installation torque or machining variations. For reliable operation, any backpressure at the drain port must be considered as it adds directly to the required pilot pressure. The DOFR8HV supports various pilot control cartridges sold separately, including electroproportional, solenoid, air pilot, and hydraulic pilot operations through its T8A cavity. Installation requires precise torque values for both main stage and pilot control valves. With a capacity of up to 30 gpm (120 L/min), this component suits applications requiring robust hydraulic balancing with minimal leakage under high-pressure conditions.
The Sun Hydraulics DOFR8HV (Material Number: DOFR8HV) is a normally open, balanced poppet switching element featuring an integral T8A control cavity. It is engineered to maintain the poppet in an open position when a 2-way valve is closed within the T8A control cavity. The poppet shifts to a closed position when the 2-way valve opens, contingent upon sufficient pressure at port 3. This component exhibits unique balanced construction, offering predictable switching at pressures up to 5000 psi (350 bar) at ports 1 and 2. Switching occurs only when a minimum pilot pressure of 400 psi (30 bar) is present and the pilot control valve is open. The valve will reopen when pilot pressure drops below 145 psi (10 bar). Ports 1 and 2 are fully sealed from ports 3 and 4, ensuring positive sealing at these points. A notable feature is its low leakage rate between ports 1 and 2, typically less than ten drops per minute at full pressure. The design incorporates Sun\u2019s floating style construction to reduce binding risks due to installation torque or machining variations. For reliable operation, any backpressure at the drain port must be considered as it adds directly to the required pilot pressure. The DOFR8HV supports various pilot control cartridges sold separately, including electroproportional, solenoid, air pilot, and hydraulic pilot operations through its T8A cavity. Installation requires precise torque values for both main stage and pilot control valves. With a capacity of up to 30 gpm (120 L/min), this component suits applications requiring robust hydraulic balancing with minimal leakage under high-pressure conditions.
This is a normally open, 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 open. Opening the 2-way valve shifts the poppet to the closed 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.
- Valve will open when the pilot pressure falls below 145 psi (10 bar).
- 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).
- 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-22A |
| Series | 2 |
| Capacity | 30 gpm120 L/min. |
| Minimum Pilot Pressure Required to Shift Valve | 300 psi20 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 - 34 Nm |
| Pilot Control Valve Hex Size | 7/8 in.22,2 mm |
| Valve Hex Size | 1 1/8 in.28,6 mm |
| Valve Installation Torque | 45 - 50 lbf ft61 - 68 Nm |
| Model Weight | .65 lb0,30 kg |
| Seal kit - Cartridge | Viton: 990-022-006 |
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