SUN HYDRAULICS
DBAPFHN

***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 DBAPFHN (DBAPFHN) is a high-performance pneumatic valve designed for precise control in hydraulic systems. This pilot-stage, directional, 2-position, 3-way valve is pneumatically operated with a spring-return cartridge mechanism. It is available in two spool configurations: normally open from port 1 to port 2 and normally open from port 1 to port 3, offering versatile application possibilities. With a hardened spool and sleeve, the DBAPFHN ensures consistent operation, low spool leakage rates, and superior wear characteristics that enhance the valve's reliability and longevity. The minimum pilot pressure required to operate the valve can be calculated using the formula: pilot pressure = 20 psi + (pressure at Port 1 divided by 100), which translates into a pilot pressure range of 20 to 70 psi or in metric terms, 1.4 to 5 bar. This model is designed to accommodate a maximum operating pressure of up to 5000 psi (350 bar) across all ports except for the pilot port, which can accept up to 500 psi (35 bar). Additionally, it features Sun\u2019s floating style construction which minimizes internal parts binding due to excessive installation torque or cavity/cartridge machining variations. The DBAPFHN fits into a T9A cavity and belongs to the P Series. It has a flow capacity of .25 gpm (1 L/min) and exhibits maximum valve leakage at around ten drops per minute under full pressure conditions. Installation requires specific torque settings ranging between 20 -25 lbf ft (27 -33 Nm), ensuring secure placement without over-tightening. This model uses Viton seals for enhanced performance under various conditions.