By Josh Cosford, Contributing Editor It seems like a question with an easy answer, but you’d be surprised how often people ask, “how do relief valves work?” We in the fluid power industry take our knowledge for granted, but each and every one of us was at some point ignorant of literally every hydraulic component […]
Valve technology for enhanced control
Innovative application-specific valve concepts are one of the most important requirements for boosting productivity in mobile hydraulic applications, according to the engineers at Bucher Hydraulics, Remscheid, Germany. The company’s new modular SC12 proportional directional valve system, for example, offers responsive control behavior and low operating costs with consistently high machine availability. At the same time, […]
Progressive versus linear spools in Danfoss PVG mobile proportional valves
Contributed by Buck Schmitt, CFPS, Territory Manager – Eastern PA and Mid-Atlantic, Kraft Fluid Systems When designing hydraulic systems for mobile machinery, there are a variety of requirements that range from basic setup functions to extremely precise maneuvers. Let’s examine the more precise and critical functions. There are several ways to approach hydraulic system challenges. […]
What is a relief valve?
A relief valve is a device used to limit pressure in one or more locations in a hydraulic circuit. A relief valve uses a spool or poppet engaged to the closed position by a spring. A spool is a cylindrical piece of machined steel that slides within a machined body. A poppet is a flat […]
Bosch Rexroth’s Subsea Valve Actuator receives award of merit
Bosch Rexroth’s new Subsea Valve Actuator (SVA) received the Award of Merit as one of five finalists in the 2019 Woelfel Best Mechanical Engineering Achievement Award. This award was presented at the Offshore Technology Conference in Houston on May 6, 2019 by the American Society of Mechanical Engineers (ASME). The SVA was recognized as a […]
When should you use on/off valves?
Contributed by Josh Cosford Although any “bang-bang” valve is one where the valve shifts between two discreet positions, either open or closed, it can also apply to valves with three positions, such as with a 4/3 solenoid operated directional valve. But there are occasions where a true On/Off valve provides the best solutions to a […]
What is a flow divider?
A flow divider is a hydraulic device that, as the name implies, separates flow into two or more parts. This lets a single pump simultaneously power more than one circuit. Two types of proportional flow dividers are the spool version; and the gear or rotary design. Spool dividers split the input flow proportionally into two […]
Webtec to highlight motor control valves, measurement solutions at bauma
Webtec will be showcasing its latest range of hydraulic components and hydraulic test equipment at this year’s Bauma 2019, which for the first time will include the recently launched CV120 series. This compact combination valve provides a complete solution to hydraulic motor control for mobile machinery and reduces both space and pressure drop in machinery […]
Solenoid-operated relief valves reduce system complexity while increasing safety
New to Sun’s cartridge portfolio and to the FLeX Series family, Sun Hydraulics now offers four new solenoid-operated relief valves. With a 2-stage, field-adjustable design, the RVC valves offer precise and dependable pressure regulation with up to 25 gpm (100 lpm) flow rates. Sun’s RVC valves offer fully adjustable, ventable and blockable relief functions for […]
Cartridge proportional valves for mobile transmissions
The ever-increasing demand for fuel efficiency and emissions reduction continues to spur the need for more efficient and reliable drive systems in mobile, construction and agricultural machinery. These applications require precise, customizable controls, especially regarding the powertrains. ARGO-HYTOS, Kraichtal, Germany, offers innovative powertrain valve systems that help OEMs and equipment users increase reliability, efficiency, performance […]
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