NAVAC NP7DPF Designed and tested to UL 121201, CSA C22.2 No. 213-17 and IEC 60079-7 StandardsSuitable for A2L, A2 and A3 refrigerants7 CFM flow rate Internal check valve to prevent oil backflowForced oil circulation for improved efficiency and durability Dual Stage Vacuum Pump for Flammable Refrigerants Reliability. Ignition-Proof.Sparkless, ignition-proof design. The NAVAC NP7DPF is designed and tested to UL 12101, CSA C22.2 No. 213-17 and IEC 60079-7 standards. Suitable for A2L, A2, and A3 refrigerants. The NP6DPF features and internal check valve to prevent oil backflow. A Dual-stage integrated cylinder design allows for high ultimate vacuum and high reliability. Forced oil circulation allows for improved efficiency and durability. A lifting hook makes the NP7DPF safe and convenient for rooftop use.