SUN HYDRAULICS
SCCALDE

***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 SCCALDE (SCCALDE) is a direct-acting sequence valve featuring an integral reverse flow check valve, designed to manage the flow to a secondary circuit once the pressure at inlet port 1 surpasses the valve setting. This model is equipped with a built-in check valve that facilitates reverse flow from port 2 to port 1. The pressure setting of this sequence valve regulates the pressure at port 1 relative to the drain port 3, which must be connected to maintain proper pressure references in the control chamber. It's crucial that the pressure at port 3 does not exceed 5000 psi (350 bar), as it directly adds to the valve setting in a 1:1 ratio. This zero pilot flow valve is particularly suitable for load holding applications and offers interchangeable functionality across all three-port sequence cartridges, maintaining consistent flow paths and cavity dimensions for given frame sizes. The SCCALDE incorporates Sun's floating style construction, minimizing internal part binding due to installation torque or machining variations. It supports a maximum operating pressure of 5000 psi (350 bar) with a capacity of up to 15 gpm (60 L/min). The cartridge can be configured with EPDM seals for systems utilizing phosphate ester fluids, although exposure to petroleum-based products should be avoided as it may damage these seals. Corrosion-resistant options include external stainless steel components or zinc-nickel plating identified by specific model code suffixes. This model ensures reliable performance with a typical response time of 2 ms and maximum leakage at reseat limited to ten drops per minute. Adjustments can be made via an internal hex adjustment screw, providing fine-tuning capabilities for specific application needs.