SUN HYDRAULICS
RSHCCDN

***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 RSHCCDN (RSHCCDN) is a pilot-operated, balanced piston sequence valve designed to manage secondary circuit flow once the inlet port 1 pressure surpasses the valve setting. It regulates pressure at port 1 relative to the drain port 3 and remains unaffected by back pressure at port 2 up to the set threshold. This valve can substitute for 2-port relief valves when there is return line pressure. The RSHCCDN model features interchangeable 3-port sequence cartridges, maintaining identical flow paths and cavity dimensions for specific frame sizes. As inlet pressure at port 1 rises above the valve setting relative to drain port 3, pilot flow increases accordingly. The main stage orifice is safeguarded by a robust 150-micron stainless steel screen, with a maximum allowable pressure of 5000 psi (350 bar) at port 3 directly adding to the valve setting in a 1:1 ratio. This model is not suited for load holding applications due to spool leakage issues. The RSHCCDN incorporates Sun's floating style construction, minimizing internal part binding risks from excessive installation torque or machining variations in cavities/cartridges. Its specifications include a T-17A cavity, Series 3 capacity of up to 60 gpm (240 L/min), and factory pressure settings established at a flow rate of 4 gpm (15 L/min). The maximum operating pressure reaches up to 5000 psi (350 bar), with control pilot flow ranging from 15\u201320 in\u00b3/min (0.25\u20130.33 L/min) and typical response time around 10 ms. Maximum valve leakage is rated at approximately 4 in\u00b3/min under conditions of 110 SUS (24 cSt) fluid viscosity and pressures of up to 1000 psi (65 bar). Adjustments are made using an internal hex screw with five clockwise turns increasing settings, supported by a locknut with specified torque requirements.