As you can see the HAFNER type numbering system is following a standard that allows you to understand what type of valve is in use or required whenever those numbers are mentioned.

The directional valves of type WE are solenoid-actuated directional spool valves that can be used as electro-hydraulic component. They control the start, stop and direction of a flow.

Valves are often referred to by their number of ports, and also by the number of "ways" that air can enter or exit the valve. In most situations the number of ports and ways are the same for a …

In this case, “J” typically refers to a specific spool configuration (center position and flow paths), such as all ports blocked, open center, or tandem center, depending on the Rexroth spool...

Place the lifting strap around the axial piston unit in such a way that it does not pass over assembled parts (e.g. valves, piping) and that the axial piston unit is not suspended from …

The use of a throttle insert is required when, due to prevail-ing operating conditions, flows can occur during the switching processes, which exceed the performance limit of the valve.

Pressure peaks in the tank line to two or several valves can result in unwanted control spool movements in the case of valves with detent! We therefore recommend that separate return …

This document provides a cross reference of industrial valves made by Rexroth and Vickers. It lists various directional control valves and flow control valves along with their sizes, models, …

Jul 19, 2023 · Directional control valves are categorized by the number of ports and the number of ways that air or fluid can travel. A port is a threaded hole in the body of the valve that allows a …

Jun 5, 2019 · Valve ports provide a passageway for hydraulic fluid to flow to or from other components. The number of positions refers to the number of distinct flow paths a valve can …