They keep debris contained for disposal to help prevent recirculation of dust and allergens

Cross Reference: Bell & Gosset 3K522

The door has a spring loaded

Safety Cabinets for Laboratory EnvironmentsGalvanized SteelDouble wall partition with 1-1/2" air space separates contents

Screw 1/2-13X1/2 Hex Cap Brass

Apollo Bronze POP Safety Relief Valve, MNPT Inlet Type, FNPT Outlet Type - 523DDDKMAA0350 ASI-Simplicity They keep debris contained forPOP Safety Relief Valve; Body Material: Bronze; Inlet Type: MNPT; Outlet Type: FNPT; Inlet Size: 3 4 in; Outlet Size: 3 4 in; Factory Set Pressure: 350 psi; Pressure Range: 15 to 1200 psi; Disc Material: 316 Stainless Steel; Overall Height: 7 1 2 in; Application: Air and Gas Compressors and Dryers, Pressure Vessels and Pressure Piping System etc; Seat Material: Metal; Spring Material: Stainless Steel; Temp. Range: 320 Degrees to 422 Degrees F; Test