SUN HYDRAULICS
RSFEABN

***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 RSFEABN (RSFEABN) is an air-controlled, pilot-operated, balanced piston sequence valve designed to utilize compressed air over a diaphragm for pressure control instead of an adjustable spring. This valve is engineered to supply a secondary circuit with flow once the inlet port pressure surpasses the valve setting, with the pressure at port 1 being controlled relative to the drain port 3. Notably, it remains unaffected by back pressure at port 2 up to the valve setting and can regulate pressure in place of 2-port relief valves if there's return line pressure. The RSFEABN model features interchangeable 3-port sequence cartridges that share flow paths and cavities for a given frame size, ensuring versatility across applications. The valve's pilot flow increases as inlet pressure at port 1 exceeds drain pressure at port 3 above the valve setting. It supports a maximum air pilot pressure of 150 psi (10.5 bar) and ensures that drain port pressures do not exceed 1000 psi (70 bar). This model is capable of providing explosion-proof remote control of its pressure settings, with hydraulic settings being directly proportional to air settings at a ratio of 20:1. The RSFEABN incorporates Sun's floating style construction to minimize internal binding risks due to excessive installation torque or machining variations. With a capacity of up to 30 gpm (120 L/min), this valve operates under a maximum operating pressure of 2000 psi (140 bar) and exhibits typical response times around 10 ms. It maintains minimal leakage rates at specified viscosities and features installation specifications like a hex size of 1-1/8 inches (28.6 mm) and torque requirements between 45-50 lbf ft (61-68 Nm). The model weighs approximately .60 lb (.30 kg) and includes Viton seal kits for enhanced durability.