SUN HYDRAULICS
SCIALEN

***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 SCIALEN (SCIALEN) is a direct-acting sequence valve with an integrated reverse flow check, designed to manage secondary circuit flow once the inlet port pressure surpasses the valve setting. This model features an integral check valve that facilitates reverse flow from port 2 to port 1, ensuring efficient operation in various hydraulic systems. The pressure setting regulates the pressure at port 1 in relation to the drain port 3. Notably, all three-port sequence cartridges are interchangeable, maintaining consistent flow paths and cavity sizes across different frames. Despite being a zero pilot flow valve, it is crucial to connect port 3 to maintain proper pressure reference; otherwise, blockage may lead to malfunction due to seal weepage. The SCIALEN is suitable for load-holding applications and operates effectively with EPDM seals in phosphate ester fluid systems, though exposure to petroleum-based substances should be avoided as they can damage the seals. It incorporates Sun's floating style construction, minimizing internal binding risks due to installation torque or machining variations. The valve supports a maximum operating pressure of 5000 psi (350 bar) and has a capacity of up to 120 gpm (480 L/min). The typical response time is approximately 2 milliseconds. Additional specifications include a check cracking pressure of 25 psi (1.7 bar), with adjustment possible through up to five clockwise turns for increased settings. The installation requires specific torque values for both the valve body and locknut components, ensuring secure and optimal performance in hydraulic circuits.