OPW
Overfill Prevention Valve (For Gravity Filling)
71SO-4000
898-541-001

The OPW 71SO vapor-tight Overfill Prevention Valve is designed to prevent the overfill of underground storage tanks by providing a positive shut-off of product delivery. The shut-off valve is an integral part of the drop tube used for gravity filling. The OPW 71SO allows easy installation (without breaking concrete) and requires no special manholes. When the liquid level rises to about 95% of tank capacity, the valve mechanism is released, closing automatically with the flow.

Valve body.................Cast aluminum
Float........................ Nitrile rubber, closed cell foam
Valve....................... Aluminum
Seals....................... Viton
Drop Tubes................ Aluminum
Plastic parts............... Acetal
Hardware.................. Stainless steel

PDF- OPW Overfill Provention Valve 71SO-4000