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p III I 11111 IIII I■III MI —L 2-NPT-1 A OPW 53-V Float Vent Valves E The OPW 53-V Series Float Vent Valves are designed c D to be installed in OPW 233-V Series extractor fittings to form a system to help prevent underground tank overfill,and reduce product mixing. The OPW 53-V Series Float Vent Valves have a a N r stainless steel ball which seats tightly against a specially designed valve seat,cutting off the flow of vapors to the i Stage I vapor recovery system,or the tank vent.These valves are superior to other valves because of the stainless steel ball float and specially designed Duragard" coated seat which helps eliminate valve hang up due to corrosion. t , DPW'.Float Vent Valves are Model 53-VM shown Covered Under Patent No.3.736,950 2"Diameter B Dimensions Ball Product No. A B C D E Weight and Suffix (Dimensions in inches) Lbs. 53-VM Used as an integral part of the OPW overfill system to 53-VM-0060 1013/16 3 1/16 6'/e 11/2 2.16 slow down the flow of liquid into the storage tank,and (Calibrated) provide an overfill warning to the operator. k 53-VML Same as 53-VM but 12"D dimension,for double 53-VML-0120 1611/16 3 1/16 12 11/2 3.99 7 wall tanks. (Calibrated) 53-VSS Used to minimize product mixing when vent lines 53-VSS-0065 913/16 3 1/e 5'/a 11/2 1.80 are manifolded underground. 53-VTS 53-VSS-0070 973/16 3 'A6 51/6 11/2 1.90 Similar to 53-VSS except vent bleed hole is only 1/16". 53-FC 53-FC-0046 727/32 3 NONE 35/32 N/A 1.23 Used only on vapor return line, has no bleed hole. Overfill Prevention Features: With the OPW 53-VM This OPW overfill prevention system is designed to reduce ■ Reliable Proven Concept.The basic concept has been the flow rate into the underground tank when there is proven in numerous applications to prevent approximately 100 gallons of ullage available. product contamination. ■ Corrosion Resistance.The OPW float vent valve is coated with Duragard T"to resist corrosion and valve The heart of this system is the patented OPW 53-VM Float hang up. Vent Valve. When the 53-VM is seated vapors escape ■Ease of Servicing.The float vent valve assembly can only through an orifice calibrated to allow approximately be easily withdrawn eliminating the need to dig to 3.5 gallons a minute of liquid flow from the transport into the tank for service.Allows tank to be plugged for testing. the underground tank.The time before actual overflow is ■product Line Flexibility.The various OPW float vent dependent upon several conditions such as size of tank, valves and extractor fittings assemblies can be amount of liquid in the tank truck,underground tank size, combined to meet various piping requirements and the depth to which the float vent valve is inserted into and/or system operating characteristics. �\ the tank. Under typical conditions in a 10,000 gallon underground tank, the time from float vent valve closure ■Adaptable.Many tanks are already equipped with to overflow is greater than 30 minutes. OPW extractor assemblies and therefore overfill prevention can be achieved by installing the OPW 53-VM-0060 calibrated orifice valve assembly. ■Ease of Testing.With use of OPW Overfill Systems,the extractors are easily plugged for testing.