SUN HYDRAULICS
SCEALAN

***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 SCEALAN (SCEALAN) is a direct-acting sequence valve with a reverse flow check, designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve setting. This model integrates an integral check valve that allows reverse flow from port 2 to port 1. The sequence valve's pressure setting controls the pressure at port 1 relative to the drain port 3, which must be connected to maintain a proper pressure reference in the control chamber. The pressure at port 3 is additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar). This valve is well-suited for load holding applications and features Sun's floating style construction, minimizing binding risks due to excessive installation torque or machining variations. The SCEALAN model has a capacity of 30 gpm (120 L/min) and operates at a maximum pressure of 5000 psi (350 bar). It features typical response times of approximately 2 ms and maximum valve leakage upon reseat of about 10 drops/min (0.7 cc/min). The check cracking pressure is set at 25 psi (1.7 bar), with adjustments made by turning clockwise up to five full turns for increased settings. Installation requires specific torques: valve hex size is 1-1/8 in. (28.6 mm) with an installation torque between 45-50 lbf-ft (61-68 Nm), and locknut hex size is 9/16 in. (15 mm) requiring torque between 80-90 lbf-in (9-10 Nm). Weighing only .60 lb (.30 kg), this model uses Viton seal kits, ensuring robust performance across varied hydraulic applications.