SUN HYDRAULICS
FRDCKIV

***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 FRDCKIV (FRDCKIV) is a specialized hydraulic valve designed to control flow in the bypass mode only, enhancing system stability in certain applications. This valve is a modification of the FRDA model and is specifically engineered to ensure that if the bypass pressure exceeds the pressure at the priority port, the priority flow will no longer be pressure compensated. Customers must specify a flow rating, with factory set flow ratings accurate within 10% of the requested setting. The valve features a maximum operating pressure of 5000 psi (350 bar) and can handle a maximum input flow of 30 gpm (120 L/min). It incorporates a sharp-edged orifice design that minimizes flow variations due to viscosity changes and includes a tunable adjustment control option that allows up to a 25% variation from the nominal factory preset flow, adjustable via three turns of an adjust screw. The Sun floating style construction helps minimize internal parts binding due to excessive installation torque or cavity/cartridge machining variations. The valve fits into a T-2A cavity and has a capacity of 12 gpm (45 L/min). It requires specific installation torques for optimal performance: valve installation torque should be between 45-50 lbf ft (61-68 Nm), while locknut torque should be between 80-90 lbf in (9-10 Nm). The adjustment screw uses an internal hex size of 5/32 in. (4 mm), and the locknut hex size is 9/16 in. (15 mm). The model weighs .40 lb (.20 kg) and utilizes Viton seals for durability under various conditions.