SUN HYDRAULICS
SCCALCV

***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 SCCALCV (SCCALCV) is a direct-acting sequence valve with an integrated reverse flow check, designed to activate a secondary circuit once the inlet port 1 pressure surpasses the preset valve setting. This valve features an integral check valve that facilitates reverse flow from port 2 back to port 1, making it suitable for load-holding applications. The pressure at port 1 is controlled relative to the drain port 3, which must be connected to maintain accurate pressure referencing in the control chamber. Blocking port 3 can lead to malfunction due to seal weepage. The pressure at port 3 adds directly to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar). This sequence cartridge is interchangeable with other three-port cartridges of the same frame size, ensuring compatibility in terms of flow path and cavity. The SCCALCV offers corrosion-resistant options, indicated by model code suffixes AP or LH for stainless steel or zinc-nickel plated components, respectively. It incorporates Sun's floating style construction to reduce internal binding risks due to installation torque or machining variations. Key specifications include a capacity of 15 gpm (60 L/min), maximum operating pressure of 5000 psi (350 bar), typical response time of 2 ms, and maximum valve leakage at reseat of 10 drops/min (0.7 cc/min). The check cracking pressure is rated at 40 psi (2.8 bar), with adjustments made via a clockwise turn mechanism allowing up to five turns for setting increases. Installation torque ranges from 30-35 lbf ft (41-47 Nm), while locknut torque is between 80-90 lbf in (9-10 Nm). This model weighs approximately .30 lb (.15 kg) and uses Viton seals under part number 990011006 for maintenance purposes.