SUN HYDRAULICS
NCGBLDN

***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 NCGBLDN (NCGBLDN) is a needle valve with a reverse-flow check, designed to regulate flow through an adjustable orifice. This valve allows for infinite adjustment from fully closed up to the maximum orifice diameter, offering unrestricted flow from port 2 to port 1 via an integral high-capacity check valve. Notably, it is not pressure compensated, meaning the fixed orifice size will control flow proportionally to the square root of the pressure differential across ports 1 and 2. The NCGBLDN features a sharp-edged orifice design that minimizes flow variations due to viscosity changes and incorporates a balanced adjustment mechanism for easy adjustments even at high pressures. This model utilizes Sun's floating style construction to reduce the risk of internal parts binding caused by excessive installation torque or machining variations. It fits into a Cavity T-18A with Series 4 capacity, supporting up to 60 gpm (240 L/min) and handling a maximum operating pressure of 5000 psi (350 bar). The valve exhibits minimal leakage, with a maximum of 10 drops/min (0.7 cc/min) at 110 SUS (24 cSt). The NCGBLDN's adjustment mechanism allows for up to five counterclockwise turns from fully closed to fully open, and it requires specific torques for installation: 350-375 lbf ft (474-508 Nm) for valve installation and 80-90 lbf in (9-10 Nm) for the locknut. The cartridge is configured with EPDM seals suitable for systems using phosphate ester fluids but should not be exposed to petroleum-based fluids as this could damage the seals. The model weighs approximately 3.00 lb (1.35 kg), and its design facilitates interchangeability with other two-port flow control cartridges of similar frame sizes while offering robust performance in regulating hydraulic flows.