Product Details: Pelican Chemical Hydraulic Internal Valve - Assembly - 4" - 316 Stainless Steel • Internal self-closing stop valve for DOT 407 and 412 cargo trailers • 316 Stainless Steel Body • Replaceable PTFE Seals • Meets requirements of 49CFR §178.435-8 • MAWP: 50 PSI (3.4 bar) • Minimum Bursting pressure: 200 PSI (13.8 bar) • Working Temperature range: -40°F to 400°F • Hydraulic Line Pressure Minimum 1500 PSI • Hydraulic Line Pressure Maximum 3,500 PSI • Hydraulic Volume to fully open: 1.05 in³