SUN HYDRAULICS
SQBBLNN

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics SQBBLNN (SQBBLNN) is a kickdown sequence valve designed for hydraulic systems requiring a full and sustained open flow path once the inlet pressure surpasses a specified threshold. This valve efficiently manages flow from port 1 to port 2, remaining open as long as the inlet pressure exceeds that at port 2. To reset, the pressure at port 1 must drop below the setpoint, and flow must cease with equal or greater pressure at port 2 compared to port 1. It is crucial to note that this valve should not be utilized in load-holding applications due to its operational characteristics. The pressure at drain port 3 influences the valve setting directly and should not exceed 5000 psi (350 bar). The SQBBLNN is typically installed on the actuator side of hydraulic systems because it requires cessation of flow for resetting; if used on the pump side, pump flow must be stopped for reset. This model features Sun's floating style construction, which reduces potential binding issues from installation torque or machining variations. It fits into cavity T-163A and offers a capacity of up to 7.5 gpm (30 L/min) with a maximum operating pressure of 5000 psi (350 bar). The valve demonstrates quick response times around 25 ms and minimal leakage rates of up to 2 in\u00b3/min (30 cc/min) at standard viscosity levels. Adjustments are made via an internal hex screw with specific torque requirements for secure installation and operation.