SUN HYDRAULICS
SCIACDN

***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 SCIACDN (SCIACDN) is a direct-acting sequence valve equipped 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 features an integral check valve that allows reverse flow from port 2 to port 1. The pressure setting of this sequence valve manages the pressure at port 1 relative to the drain port 3, and it is suitable for load holding applications. All three-port sequence cartridges are interchangeable, offering the same flow path and cavity for a given frame size. Although it is a zero pilot flow valve, port 3 must be connected to maintain pressure reference in the control chamber; blocking it may lead to malfunction due to seal weepage. The maximum operating pressure is rated at 5000 psi (350 bar), and the response time is typically around 2 ms. The valve supports a capacity of up to 120 gpm (480 L/min) and has factory pressure settings established at 2 in/min (30 cc/min). It incorporates Sun's floating style construction, minimizing internal part binding due to installation torque or machining variations. The model includes EPDM seals for use with phosphate ester fluids, but exposure to petroleum-based fluids can damage these seals. Additional specifications include a check cracking pressure of 25 psi (1.7 bar), adjustment screw internal hex size of 5/32 in (4 mm), and locknut torque between 80-90 lbf in (9-10 Nm). The unit weighs approximately 3.10 lb (1.40 kg).