SUN HYDRAULICS
SCGALDV

***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 SCGALDV (SCGALDV) is a direct-acting sequence valve with a reverse flow check, designed to supply a secondary circuit with flow once the inlet port pressure exceeds the valve setting. It features an integral check valve allowing reverse flow from port 2 to port 1. The pressure setting controls the pressure at port 1 relative to the drain port 3, and all three-port sequence cartridges are interchangeable in terms of flow path and cavity size. Despite being a zero pilot flow valve, it requires port 3 to be connected for maintaining pressure reference; blocking this can cause 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 model is suitable for load-holding applications and incorporates Sun\u2019s floating style construction, minimizing internal binding due to installation torque or machining variations. The SCGALDV has a capacity of 60 gpm (240 L/min) with factory pressure settings established at 2 in/min (30 cc/min). It operates at a maximum pressure of 5000 psi (350 bar) with typical response times of around 2 milliseconds. The maximum valve leakage at reseat is rated at 10 drops/min (0.7 cc/min), and it has a check cracking pressure of 25 psi (1.7 bar). Adjustments can be made through five clockwise turns, with specific hex sizes for the valve and adjustment screws. Installation torque ranges between 150 to 160 lbf ft (203 to 217 Nm), while locknut torque ranges from 80 to 90 lbf in (9 to 10 Nm). The model weighs approximately 1.50 lb (0.70 kg) and uses Viton seal kits for cartridge applications.