In the most traditional sense, a directional control valve simply dictates the direction of hydraulic flow in some regard. The inline check valve is generally regarded as the most basic version of a directional valve, and simply allows flow in one direction while blocking flow in the opposing direction. Their advantage lies in their simple, […]
Valves / Manifolds
When can you use manual hydraulic valves?
By Josh Cosford, Contributing Editor Although many valves have a manual adjustment, as the knob on a flow control or the hex screw on a relief valve, we generally consider a manual valve to be a directional valve operated by a lever, button or knob. Many hydraulic systems run exclusively with manual valves, like your […]
How are ball valves used to ensure hydraulic safety?
By Josh Cosford, Contributing Editor In fluid power, safety is always a concern. Everyone understands the force capacity of hydraulic actuators (which explains why some YouTube hydraulic press channels have millions of subscribers). Indeed, a high-powered hydraulic press can make nearly any material appear no stronger than modelling clay. It’s wise to respect the power […]
Modular and block control valves for excavator use
Linde Hydraulics GmbH & Co. KG has introduced a new generation of control valves for use in wheeled excavators. The new valve block VW 22/18 M5-03 for the open circuit is characterized by its modular system, while the monoblock with five sections plus pressure relief section represents the basic set-up. Optionally, three additional sections can […]
When should you use check valves?
By Josh Cosford, Contributing Editor Check valves are the most basic form of directional valve. In their simplest form, a check valve has the singular task of allowing flow in one direction while blocking flow from returning in the opposite direction. These valves are not only simple in their operation but also simple in their […]
When should you use cartridge valves?
By Josh Cosford, Contributing Editor Cartridge valves are a type of compact hydraulic valve that slips or screws into the machined cavity of a ported manifold or block. Unlike other valves, such as monoblock lever valves or stackable industrial valves, the manufacturer leaves the porting for you to decide. Cartridge valves still use poppets or […]
Electrohydraulic inverse proportional pressure relief valve for fan drives
The RPEI electrohydraulic inverse proportional pressure relief valve is a new high-capacity pressure control that provides smooth, precise speed control in fan drive applications. Designed for use in fan drive applications, the RPEI combines attributes of an electro-proportional adjustable pilot stage valve and a high-capacity main stage valve to provide precise pressure control inversely proportional […]
What are the differences between proportional and servovalves?
By Josh Cosford, Contributing Editor The line that separates the performance of servo and proportional valves has blurred in recent years. Some may consider a servovalve to be any valve capable of accurately positioning your actuator with closed-loop control. However, in everyday hydraulic circles, many industry professionals describe a servovalve as a valve with a […]
Electronic control units for hydraulic valve control
Argo-Hytos is launching new sophisticated and versatile proportional electronic control units for hydraulic applications. The EL7 control unit offers multiple types of analog input signals (nine) and also gives the user the option to switch to the CAN bus interface. Everything is easily parametrizable via Bluetooth using the ARGO-HYTOS app, which is free to download […]
HRV-HP inline pressure relief hydraulic valve
Doering’s hydraulic inline pressure relief valves are an easy way to protect any hydraulic system from pressure spikes. Easy to install and durable for a long life. HRV-HRVF-HRVM High Pressure direct-acting relief valves are normally closed, pressure-limiting valves used to protect hydraulic systems from pressure spikes. When the pressure at the inlet reaches the pressure […]
