VALVES & FLOW CONTROL THE RSV SOLUTION
DRALLIM
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 + 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
Our Rotary Selector Valve is used across many industries such as military , aerospace ( including NASA ), marine , industrial and nuclear .
such as the emergency gas slam-shut system shown top right . 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 .
For further information , please visit www . drallim . com
96 PECM Issue 59