The 70 and 71 Series unidirectional, high-performance ball valves are designed to exceed 100,000 cycles with zero leakage. Two stem seal designs, DL a Delta design and TL an energized Teflon®, enable high-cycle and zero leakage while ensuring system compatibility. Operating pressure ranges to 6000 PSIG with temperature ranges from -65° to +350°F. Hoke Inc. 2301 Wardlow Rd., #PO 3300 Corona, CA, 92880-2894