Overfill Prevention Valve for Used Oil Systems

FIG FMMASO

The ASO series of valves is used to shut-off the air supply to an AOD (Air-Operated Diaphragm) pump when the liquid level approaches full capacity.

The ATO valve is used to turn on the air supply to an AOD pump when the liquid level approaches the full capacity.

Standard Features

  • Installs directly into a 2″ female threaded tank top opening
  • Accepts ¼″ air lines
  • When the ASO valve closes, the air supply is diverted to an audible whistle on the 91S and 91EXS models
  • Operating temperature range is -10°F to 185°F
  • Air flow capacity is 20 CFM @ 100 PSI. Maximum air pressure is 100 PSI
  • Valve automatically resets as liquid is removed and the air pressure to the valve is turned off
  • FMMASO-91 and 91S shut-off height is 6½″ from the tank top
  • FMMASO-91EX and 91EXS shut-off height is 17⅜″ from the tank top

 

Construction Details

  • Valve body and collar: Anodized aluminum
  • Float: Polypropylene
  • Float rod and valve spool: Brass
  • O-ring seals: FKM
  • Hardware: Stainless and plated steel

 

Code Compliance

ULC Listed

Florida DEP EQ 576

 

Patent 5007450

Valve with optional alarm for use on used oil evacuation systems which use an air operated pump

 

Figure Suffix Size Description Weight (lbs)
FMMASO 91EX AV 2"  Air Shut-Off Valve, w/o audible signal, extended shut-off height body 5
FMMASO 91EXS AV 2" Air Shut-Off Valve, w/ audible signal, extended shut-off height body 5
FMMASO 91 AV 2" Air Shut-Off Valve, w/o audible signal 2.5
FMMASO 91S AV 2" Air Shut-Off Valve, w/ audible signal 2.6
FMMASOB 91S AV 2" Air Shut-Off Valve, w/o audible signal, BSP Threads 5
FMMATO 91 AV 2" Air Actuation Valve, w/ High Level, w/o audible signal 2.5

Sales

Meet our Domestic and International Sales Team.

Domestic Sales
International Sales

sales

Product Literature

View and download Morrison product catalogs and literature.

See All Product Literature

sales

CARB Certification

Morrison Bros. Co. has received approval from California’s Air Resource Board for a Phase 1 Enhanced Vapor Recovery System for Protected Aboveground Storage Tanks. Click here to get started on your CARB certification!

Copyright © 2021 Morrison Bros. Co. ® - All Rights Reserved.