Asahi Check Valves from HMA Flow & Industrial are available in sizes from ¾” to 8″, with a minimum flow resistance for a low pressure drop. Installation can be vertical or horizontal, while all sizes are rated for full vacuum service. Minimum back pressure allows for the disc to be seated tightly. A top access cover facilitates maintenance, without having to remove the valve body itself from the pipeline. PVC and PP versions are supplied with EPDM seals.