SUN HYDRAULICS
PRJRKBV

***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 PRJRKBV (PRJRKBV) is a direct-acting pressure reducing valve designed to reduce a high primary pressure at inlet port 2 to a consistent, reduced pressure at port 1. This valve features a damped construction for stable operation, making it suitable for applications requiring high reduced pressure. It is important to note that this valve lacks relieving capability and should not be used in deadheaded applications, as pressure may rise significantly on the reduced side with very low leakage circuits. The PRJRKBV serves as an effective replacement for an LPC as a normally open, restrictive compensating element when higher pressure drop across an orifice is needed. However, reverse flow from port 1 to port 2 can cause the main spool to close; thus, adding a separate check valve may be necessary if reverse free flow is required. This valve is ideal for accumulator circuits due to its absence of pilot control flow, which results in reduced secondary circuit leakage. Its direct-operated design offers superior dynamic response compared to pilot-operated models. The valve setting can be directly influenced by pressure at port 3 at a 1:1 ratio, not exceeding 5000 psi (350 bar). Leakage specifications are related to supply pressures of 2000 psi (140 bar) with the valve set at mid-range and are directly proportional to pressure differential and inversely proportional to viscosity. The PRJRKBV incorporates Sun's floating style construction, minimizing internal part binding risks due to excessive installation torque or machining variations. It features Series 4 cavity T-19A with an impressive capacity of up to 80 gpm (320 L/min) and operates under maximum pressures of up to 5000 psi (350 bar). The adjustment mechanism allows for precise control with five clockwise turns needed to increase settings.