SUN HYDRAULICS
SCEALAV

***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 SCEALAV (SCEALAV) is a direct-acting sequence valve with an integrated reverse flow check, designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve setting. This valve features an integral check valve that enables reverse flow from port 2 to port 1. The pressure setting at port 1 is controlled relative to the drain port 3, and it is crucial for port 3 to remain connected to maintain a pressure reference in the control chamber. Blocking port 3 can lead to malfunction due to reciprocating seal weepage. The pressure at port 3 adds directly to the valve setting at a 1:1 ratio, with a maximum limit of 5000 psi (350 bar). This makes it suitable for load-holding applications. The SCEALAV model incorporates Sun's floating style construction, which minimizes internal binding from excessive installation torque or machining variations. It offers physical and functional interchangeability among all three-port sequence cartridges of the same frame size, ensuring consistent flow paths and cavity compatibility. With a capacity of up to 30 gpm (120 L/min) and maximum operating pressure of 5000 psi (350 bar), this valve provides reliable performance with typical response times around 2 ms and minimal leakage rates at reseat conditions. It features adjustable settings through clockwise turns, with specific torque requirements for installation and adjustment components such as locknuts and adjustment screws. Weighing approximately .60 lb (.30 kg), this model is equipped with Viton seals for durability in various hydraulic applications.