Description
Flow is allowed to pass from V2 to C2 when pressure at V2 rises above the spring bias pressure and the poppet is pushed from its seat. The valve is normally closed (checked) from C2 to V2; when sufficient pilot pressure is present at Pil the pilot piston acts to push the poppet from its seat and flow is allowed from C2 to V2. The pilot piston is vented and the pilot pressure required to push the poppet from its seat is independent from any back-pressure at V2 port.
In case of valve application in redundancy systems it is especially recommended to use version with sealed pilot piston.
Note: aluminium bodies are often strong enough for operating pressures
exceeding 210 bar (3000 psi), depending from the fatigue life expected in the
specific application. If in doubt, consult our Service Network.
