Overview Reviews Product Description ST-280 UNLOADER 8GPM 4060PSI Pressure actuated unloader. SPECIFICATIONS: Maximum pressure: 3600 PSI Maximum Flow: 8 GPM Maximum temperature: 176 F Inlet: 3/8" FPT Outlet: 3/8" FPT Bypass: 1/4" FPT Product Videos Custom Field Product Reviews Write a Review Write a Review × Suttner ST-280 UNLOADER 8GPM 4060PSI Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *