Vacuum Relief Vent 4" Swivel 407/412 With Ports
                    Unit of Measure
                    
               
        
            
                                                                                Package Type | 
                                                                        N/A Each | 
                                                                                Units Per Package | 
                                                                        N/A 1 | 
                                                                                Size | 
                                                                        N/A 4 " | 
                                                                                Vendor Item # | 
                                                                        N/A RVV4ST | 
                                                                                Weight | 
                                                                        N/A 8.5 lb | 
                                                                                Mounting | 
                                                                        N/A Swivel Nut | 
                                                                                Manufacturer | 
                                                                        N/A Betts | 
                                                                                Betts # | 
                                                                        N/A RVV4ST | 
                                                                                Girard # | 
                                                                        N/A 407MVBLTT | 
                                                                                Elastomer | 
                                                                        N/A PTFE | 
                                                                                Features | 
                                                                        N/A The Betts’ GuardianTM vacuum breaker is a spring loaded reclosing vacuum relief valve for use on a cargo tank’s vacuum relief system. The vacuum breaker is designed, tested and marked in accordance with 49CFR §178.345-10, 49CFR §178.347-4 and 49CFR §178.348-4. Compact Optimized Flow Design 316 Stainless Steel construction. Teflon seals and wear components. Seal tabs on shroud and swivel nut for security measures. Simple In-place Maintenance. Available ECTFE (Halar®) coated. Multiple sizes and mounting options. Multiple seal options. Vibration damping design. 1” NPT and ¼” NPT mounting ports. 3? and 4? NPS Swivel connection. |