SUN HYDRAULICS
RSFCWDV

***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 RSFCWDV (RSFCWDV) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve setting. This valve controls the pressure at port 1 relative to the drain port 3 and is insensitive to back pressure at port 2 up to the valve setting. It can replace two-port relief valves when there is pressure in the return line. All three-port sequence cartridges are interchangeable in terms of flow path and cavity for a given frame size. The pilot flow increases as pressure at port 1 rises above the valve setting relative to port 3. The main stage orifice is protected by a 150-micron stainless steel screen, and pressure at port 3 adds directly to the valve setting at a 1:1 ratio, not exceeding 5000 psi (350 bar). This model is not suitable for load holding applications due to spool leakage. The RSFCWDV features W and Y control options that can be specified with or without special settings, adjustable throughout their full range unless a maximum setting is specified. Cartridges with EPDM seals are designed for phosphate ester fluids, as petroleum-based fluids will damage these seals. The Sun floating style construction minimizes internal parts binding from excessive installation torque or machining variations. This model fits a T-2A cavity, has a capacity of 30 gpm (120 L/min), and operates under a maximum pressure of 5000 psi (350 bar). It has a control pilot flow of 10-15 in\u00b3/min (0.16-0.25 L/min) with typical response times around 10 ms and maximum leakage of 3 in\u00b3/min at 1000 psi (50 cc/min at 70 bar). It requires specific installation torque values for optimal performance: valve hex size is 1-1/8 inches (28.6 mm) with installation torque between 45-50 lbf ft (61-68 Nm). The adjustment screw has an internal hex size of 5/32 inches (4 mm), while the locknut hex size is 9/16 inches (15 mm), with locknut torque ranging from 80-90 lbf in (9-10 Nm). The model weight is approximately .50 lb (.25 kg), and it uses Viton seal kits identified as part number: 990202006.