Morrison Bros. FMMASO Series Overfill High-Level Turn On Warning Valve for Sump Applications

Description

The ASO series of valves is used to shut off the air supply to an AOD 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.

Features

Installs directly into a 2” female threaded tank top opening
Accepts 1/4” 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 -10ºF to 185ºF
Model ASO-91 and 91S shut off height is 7 inches from the tank top
Model ASO-91EX and 91EXS shut off height is 17?” inches from the tank top
Air flow capacity is 20 CFM @ 100 PSI
Maximum air pressure is 150 PSI
The valve will automatically reset as liquid is removed and the air pressure to the valve is turned off

Construction Details

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

Certifications

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

Downloads
FMMASO-91S Installation & Maintenance Instructions (PDF Download) FMMASO-91 Installation & Maintenance Instructions (PDF Download) FMMASO-91EXS Installation & Maintenance Instructions (PDF Download) FMMASO-91EX Installation & Maintenance Instructions (PDF Download) FMMASO-91 Installation & Maintenance Instructions (PDF Download)