SUN HYDRAULICS Normally closed, balanced poppet, logic element – pilot-to-open(DKFSXHN)

This is a normally closed, balanced poppet, switching element. Pilot pressure at port 3 shifts the valve to the open position.

• Unique balanced construction provides predictable switching with 5000 psi (350 bar) at both ports 1 and 2, with the external drain open and a minimum pilot pressure of 300 psi (20 bar).
• 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).