Model: DKHR8
Normally closed, balanced poppet, logic element with integral T-8A control cavity - vent-to-open
Cavity: T-23A | Capacity:
Technical specifications
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
- Series
- Capacity60 gpm
- Maximum Operating Pressure5000 psi
- Minimum Pilot Pressure Required to Shift Valve300 psi
- Control Pilot FlowSee Performance Data
- Maximum Valve Leakage at 110 SUS (24 cSt)10 drops/min.@5000 psi
- Pilot Control CavityT-8A
- Pilot Control Valve Hex Size7/8 in.
- Pilot Control Valve Installation Torque20 - 25 lbf ft
- Valve Hex Size1 1/4 in.
- Valve Installation Torque150 - 160 lbf ft
- Model Weight1.20 lb
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
What parts of the Sun cartridge valve are field serviceable?
I need to discharge a large accumulator. How can I increase the capacity of my discharge circuit?
How big is a drop of hydraulic oil?
Direct acting or pilot operated - what do I use?
- Compound cartridge (pilot and main stage) assembly information is provided for reference only. Cartridges must be ordered separately and assembled at point of use.
Highlights
Technical Tips
Technical Information
- DKHR Normally closed, balanced poppet, logic element - vent-to-open