Check valves are used to prevent the reversal of flow in a line. When open and under flow pressure, the checking mechanism will move freely in the media, offering very little resistance and minimal pressure drop. We offer two basic types of check valves: swing check valves and ball check valves. A swing check valve utilizes a swinging disc, which requires only minimal back pressure to close the valve. This valve can also be modified, with a lever and weight or spring, to assist in seating faster to eliminate shock. The Asahi/America ball check valve employs a free moving ball, which unseats to permit flow in one direction, but seals against a seat to prevent back flow. Both types of valves may be installed vertically or horizontally.

Features and Benefits

• Minimum flow resistance - Low pressure drop
• Horizontal or vertical installation
• All sizes rated for full vacuum service
• Minimum back pressure to seat disc tightly
• Top access cover facilitates maintenance without body removal from pipeline
• All thermoplastic body
• All PVC parts made of high impact PVC
• PVC and PP valves come with EPDM seals (part # s 5j, 5k, 6 and 7) as standard
• PVDF valves (part # s 5j and 7 of PTFE; and 6 of PVDF bonded EPDM)
• 3/4" PP valves supplied with ring 1a

Typical Applications

• Chemical Processing
• Water & Wastewater
• Landfills
• Irrigation
• Food Processing
• Mining

Options

• External lever and weight to assist disc in closing faster
• External spring to assist disc in closing faster
• PTFE or FKM seat and O-Rings