SUN HYDRAULICS
SCEALWV

***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 SCEALWV (SCEALWV) is a direct-acting sequence valve with a reverse flow check, designed to supply a secondary circuit with flow once the inlet port 1 pressure surpasses the valve setting. This valve integrates an integral check valve to allow reverse flow from port 2 sequence to port 1 inlet. The sequence valve's pressure setting manages the pressure at port 1 in relation to the drain port 3. It is crucial for port 3 drain to be connected, as blocking it can cause malfunction due to reciprocating seal weepage. The pressure at port 3 directly adds to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar). This model is suitable for load-holding applications and features interchangeable three-port sequence cartridges that share the same flow path and cavity for a given frame size. The Sun floating style construction minimizes internal parts binding due to excessive installation torque or machining variations. The SCEALWV has a cavity of T-2A, Series 2, with a capacity of up to 30 gpm (120 L/min) and operates at a maximum pressure of 5000 psi (350 bar). Its typical response time is approximately 2 milliseconds, with maximum valve leakage at reseat being about 10 drops/min (0.7 cc/min). The check cracking pressure stands at 25 psi (1.7 bar), and adjustment settings can be increased by turning clockwise up to five full turns. Installation specifications include a valve hex size of 1-1/8 inches (28.6 mm), installation torque between 45 - 50 lbf ft (61 - 68 Nm), an adjustment screw internal hex size of 5/32 inches (4 mm), locknut hex size of 9/16 inches (15 mm), and locknut torque between 80 -90 lbf in (9 -10 Nm). The model weighs approximately .60 lb (.30 kg) and uses Viton seal kits like part number: 990202006.