In many applications where a purge was not necessary and space Inside instruments was limited, there was a need for a small form factor rotary valve. The MRV was designed from our purged rotary valve series (RV series) here our embedded purge system made this valve slightly bigger. We kept ll our patented features from the RV series that were taking it so reliable, like the double stopper, coated guide bushing drive adaptor, anti-rotational dowel pins and treated rotors.