Valves
Check Valves
Circle Seal Check Valves Circle Seal Controls manufactures and markets a variety of control valves and regulators for industrial instrumentation, OEM, and aerospace/military markets. For over fifty years Circle Seal Controls has developed products that have set the pace in high quality check valves, relief valves, solenoid valves, regulators, manifolds, and instrumentation valves. Circle Seal Controls offers a complement of Engineering, Manufacturing, Quality Control, and Marketing capabilities to assist designing and manufacturing in new applications.
Plastomatic Check Valves All True Blue Check Valves feature rugged thermoplastic construction with no wetted metal parts. As your assurance of quality, each valve is individually tested under pressure by a Plast-O-Matic inspector prior to shipment. Diaphragm Check Valves are Superior to "ball checks". The patented diaphragm in the Plast-O-Matic True Blue Check Valve is designed to re-seat with a bubble tight seal regardless of mounting position or reverse flow. Ball style check valves require two properties to seal properly: First, the ball check must be mounted with the flow direction pointed up, because gravity is required to pull the ball to the seat. Secondly, some reverse pressure and flow must be present, because pressure is required to seal the ball exactly on the seat.
Hoke Check Valves Hoke makes check valves with a variety of body materials, seal materials, end connections, and cracking pressures.
