SUN HYDRAULICS
SQFBKBV

***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 SQFBKBV (SQFBKBV) is a specialized kickdown sequence valve designed for hydraulic systems where it is crucial to maintain an open flow path once the inlet pressure at port 1 surpasses the pre-set valve threshold. This valve ensures unrestricted flow from port 1 to port 2 sequence, provided that the pressure at port 1 remains higher than that at port 2. To reset, the pressure at port 1 must drop below the set value, and flow must cease while ensuring that pressure at port 2 is equal to or greater than at port 1. The SQFBKBV valve features a protective main stage orifice with a stainless steel screen of 150 microns and is not recommended for load-holding applications. It incorporates Sun's floating style construction, which reduces internal binding risks due to installation torque or machining variations. The valve has a maximum operating pressure of 5000 psi (350 bar) and can handle a capacity of up to 30 gpm (120 L/min). It responds typically within 25 ms and maintains minimal leakage under specified conditions. The adjustment mechanism allows for precise setting changes with five clockwise turns increasing the setting. Installation requires specific torque settings, including a valve installation torque of 45-50 lbf ft (61-68 Nm) and locknut torque of 80-90 lbf in (9-10 Nm). The SQFBKBV is designed for actuator-side applications where flow cessation enables resetting, making it unsuitable for pump-side installations unless pump flow can be halted. Its robust design ensures reliable performance in demanding environments while offering easy interchangeability with other three-port sequence cartridges in its series.