SUN HYDRAULICS
RSHSCCV

***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 RSHSCCV (RSHSCCV) is a pilot-operated, balanced poppet sequence valve designed to supply a secondary circuit with flow once the inlet port 1 pressure surpasses the valve setting. It effectively controls the pressure at port 1 relative to port 3, remaining insensitive to back pressure at port 2 up to the valve setting. This feature allows it to regulate pressure in place of two-port relief valves when there is return line pressure. The valve's three-port sequence cartridges are interchangeable, maintaining the same flow path and cavity for a given frame size. As the inlet pressure at port 1 rises above the valve setting relative to port 3, pilot flow increases. A stainless steel screen protects the main stage orifice. Pressure at port 3 directly adds to the valve setting at a 1:1 ratio, not exceeding 5000 psi (350 bar), making it suitable for load holding applications. The modulating action occurs inside the cartridge, rendering these valves immune to cavitation issues like noise and manifold erosion. They can handle maximum pressure at port 2 and are suitable for cross-port relief circuits. The Sun floating style construction minimizes internal part binding due to excessive installation torque or machining variations in cavity/cartridge design. This model fits into cavity T-17A and belongs to Series 3 with a capacity of up to 60 gpm (240 L/min). Factory pressure settings are established at a flow rate of 4 gpm (15 L/min), with a maximum operating pressure of 5000 psi (350 bar). Typical response time is around 10 ms, with maximum leakage upon reseat being approximately 10 drops/min (0.7 cc/min). Adjustment involves five clockwise turns for increased settings, with specific torque requirements for installation and adjustment components provided in detail. The model weighs approximately 1.50 lb (0.70 kg) and uses Viton seal kits identified as part number 990217006.