Drallim Rotary Selector Valve Debuts At Valve World

The RSV is a multiport, sprung loaded poppet valve, driven by a profiled internal cam, with each port configurable in multiple banks. It stacks allowing different fluids to pass through each bank, in a variety of sequences, with indexing, key locks, actuation, switch outputs and a host of other options. Used in small bore piping systems in the range -1bar to 10bar.

It is a simple and extremely reliable unit, of modular design, configurable for a multitude of applications. It comes in brass or stainless steel, both having stainless spindles, with stems and seals in materials to suit the process media.

In complex pneumatic control systems for high integrity applications, it eliminates the cross-port leakage issues found with multiport ball valves. It is also used in hydraulic applications such as drain and purge or hydraulic actuation and a host of control applications where process sequences and interlocking can be easily configured in one device providing a highly adaptable solution to a wide range of fluid control applications.

In processing plants, where the fluid flow is controlled by in-line valves. Pneumatic control of the actuators that open or close these in-line valves is achieved using electrical solenoid valves that, in turn, pressurise or vent the actuators. As an emergency safety feature or to carry out planned maintenance, it is necessary to by-pass those solenoids. Using an RSV enables a manual override.

Single acting actuators (spring return) are controlled by a single pneumatic signal and are bypassed using a single bank RSV having one airpath.

Double acting valves require one side to be pressurised with the other vented, employ a two-bank valve.

Multiple actuators can be controlled by a single RSV having up to six separate banks.

We are interested to meet users from all industries and explain some of the multitude of uses we have engineered for over many decades of production. This stretches from many process interlock and valve and solenoid testing applications through too supply of complex control cabinets in process critical applications.

We are especially interested to hear from potential agents and partners from around the world who can join with us in solving customer process problems.