Drallim Rotary Selector Valve (RSV) for Critical Service Systems

The RSV continues to collect new and interesting applications. It is a small bore, multiport, multibank rotary poppet valve system suitable for a variety of fluids operating from -1 to +10 bar.

The latest configuration has been created as the heart of a piece of equipment designed to monitor the conductivity and dissolved oxygen levels in water samples. The intention is to be able to divert the single sample stream through two different Conductivity Flow Cells and Cation Columns/Filters, but also with the capability to be able to reverse the flows to enable backflushing of the two Cation Columns/Filters while the system is in operation.

The pictures show the valve in development with a complex flow diagram.

At the same time, we continue to receive orders for bigger more complex systems such as the emergency gas slam-shut system shown above. Originally developed with ball valves which failed due to cross port leakage. The RSV solved an important safety issue and has proven to be a robust and reliable solution in this low temperature critical gas safety system.

Drallim offer full support to process equipment designers, to solve complex problems with the elegant RSV solution which is highly adaptable and available in Brass and Stainless Steel, with Fluoro Elastomer Seals and PTFE or ACETAL Resin Stems, according to service duty.

The valve is used in many applications ranging from propeller pitch control, fuel change over systems, Emergency stop systems, bypass systems, and test circuits. The valve is also used in process systems such as partial stroke testing, water treatment and in override panels.

Our Rotary Selector Valve is used across many industries such as military, aerospace (including NASA), marine, industrial and nuclear. Having been built since 1958, Drallim can still support fully, as well as replace using the exact same footprint all the while guaranteeing zero cross port contamination.

Published: 8th November 2022