4CT10A20UB

The 4CT10A20UB check valve belongs to the Check Valves series and is produced by Vickers for hydraulic automation circuits where reverse flow must be blocked until pilot pressure opens the poppet. The valve tolerates system pressures up to 210 bar (3000 psi) so it can be installed on medium-pressure mobile or industrial lines. A nominal flow rating of 300 l/min (75 gpm) allows the unit to pass large volumes without excessive restriction, while a pressure drop of 3.4 bar (50 psi) at that flow indicates expected energy loss across the body. The poppet lifts once inlet pressure reaches the 2 bar (30 psi) cracking point to permit forward flow and maintain low leakage. Physical dimensions of 107.9 mm in length, 99.1 mm in width, and 193.8 mm in height help designers allocate space in compact manifolds. The housing weighs 12 kg (26.5 lb), supporting stable mounting without additional brackets. These features define the basic hydraulic performance and physical envelope of the valve.

For contamination control the 4CT10A20UB should operate with fluid cleanliness not worse than ISO 20/18/15, which limits particle ingress that could erode the seat. A pilot area ratio of 2.6:1 means a relatively small pilot pressure can overcome the main poppet force to enable reverse flow when required. The gauge port is tapped 7/16-20 UNF so technicians can connect pressure instrumentation during commissioning, and the dedicated pilot port uses a 9/16-18 UNF thread for reliable hose attachment. Main line connections are supplied as 1-1/4 NPTF threads, matching the NPTF port style specified for the body and simplifying hookup to common schedule-pipe adapters. Fluorocarbon (Viton) seals withstand higher temperatures and aggressive fluids that would degrade standard nitrile elements. Together these connection details and material selections support leak-free integration and controlled actuation of the valve within broader hydraulic systems.