Good Day,Our company is in need of PRESURE RELIEF DAMPER that automatically open when it reaches 50pascal above.Best Regard,Julius Caesar M. QuitioanMinocci Industries, Inc.230 Livelihood Extension, Batasan HillsQuezon City, NCR 1126 PhilippinesMobile : (+63922) 524 6357Email:Telefax. no.: (+632) 428 3483 Show More