SUN HYDRAULICS
RQIBCQN

***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 RQIBCQN (RQIBCQN) is a kickdown relief cartridge designed to operate similarly to a circuit breaker in an electrical system. Upon exceeding the valve setting at the inlet port 1, the valve kicks completely open, allowing unrestricted flow from port 1 to tank port 2. It remains open as long as the pressure at port 1 surpasses that at port 2. To reset, flow from port 1 to port 2 must stop, and pressure at port 2 should equal or exceed that at port 1. This valve is physically and functionally interchangeable with other two-port relief cartridges of the same frame size, except pilot reliefs, sharing the same flow path and cavity. The main stage orifice is safeguarded by a 150-micron stainless steel screen. This cartridge is not recommended for load-holding applications and should be used on the actuator side of a system because flow through it must cease for resetting. If applied on the pump side, pump flow must be halted for resetting. Back pressure on tank port 2 adds directly to the valve setting at a 1:1 ratio. The corrosion-resistant design makes it suitable for use in corrosive environments. The RQIBCQN model incorporates Sun's floating style construction to reduce internal part binding due to excessive installation torque or cavity/cartridge machining variations. It offers a capacity of up to 100 gpm (380 L/min) with a maximum operating pressure of 5000 psi (350 bar) and typical response time of approximately 25 ms. This model features an adjustment range with five clockwise turns available to increase settings and includes specific dimensions and torque requirements for installation and adjustment components. Notably, this product can be applied in scenarios such as portable grain augers for silos where quick relief is crucial for safety purposes.