E-LOKA Vent-to-open, spring-biased closed, unbalanced poppet logic element with pilot source from port 1
SYMBOL
DESCRIPTION
The E-LOKA is an unbalanced, vent-to-open logic valve. They are 2-way switching elements that are spring-biased closed and have port 1 as a pilot source.
OPERATION
These unbalanced, vent-to-open logic valves are 2-way switching elements that are spring-biased closed and have port 1 as a pilot source. With port 3 blocked, the valve will remain in the closed position in the 1 to 2 direction and will function as a check valve from 2 to 1. With port 3 vented, the valve will open provided there is sufficient pressure to overcome the spring force. The force generated at port 3, plus the spring force, must be greater than the sum of the forces acting at port 1 and port 2 for the valve to remain closed. NOTE: The pilot area (port 3) is 1.8 times the area at port 1 and 2.25 times the area at port 2.
FEATURES:
l These valves will work in Sun's standard T-19A cavity at lower capacity. To realize the full stated capacity, the T-19AU cavity should be used.
l Because these valves are unbalanced, operation is pressure dependent. Opening and closing of the poppet are functions of the force balances on three areas: Port 1 = 100%, Port 2 = 80%, and the Pilot Area = 180%.
l All ports will accept 5000 psi (350 bar).
SPECIFICATIONS:
Working Pressure: 350 bar (5000 psi)
Flow Rating: 1200 L/min (300 gpm)
Maximum Internal Leakage: 10 drops/min.at 110 SUS (24 cSt)
Temperature Range: - 30 °C to +120 °C (- 22 °C F to + 250 °C F)
Area Ratio, A3 to A1: 1.8: 1
Area Ratio, A3 to A1: 2.25: 1
Fluids: Mineral based fluids with viscosities of 7.4 to 420 cSt (50 to 2000 ssu)
Cavity: T-19AU
PERFORMANCE:
DIMENSIONS:
ORDER CODE:
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