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TB -61 -SO
<br />May 27, 1988
<br />18 ©Can the OPW 61 -SO ber0fitinto existing, in service UST'*
<br />[-A] Yes. One of the salient benefits of using the OPW 61 -SO is its ease of retrofit into existing locations. No special manholes or O
<br />spill containers are required. Should an existing location have a spill container already installed the OPW 61 -SO retrofits
<br />directly, without removing the existing unit. Likewise, this allows them a rketer to seIectthe best spill container to meet his _
<br />requirements and use it in conjunction with the OPW 61 -SO. The specifier has all his options open for equipment selection. • • OVERFILL
<br />Also, if spill containment is not employed, the OPW 61 -SO retrofits directly into existing manholes without any excavation,OPW
<br />breaking of concrete, etc. PREVENTION
<br />190 Will the OPW 61 -SO workin a co -axial vaporrecoverysystem? VALVE
<br />[AIDistributorfor
<br />Presently, the OPW 61 -SO is designed onlyfortwo pointfill and vapor recovery UST systems. Contact OPW oryour OPW
<br />availability of a co -axial version. This technical bulletin is designed to answer some of the most commonly asked questions aboutthe OPW 61 -SO Overfill
<br />Prevention Valve. While we've made every attemptto be as complete as possible, perhaps we have missed your question. If a
<br />20 A What aboutDouble Wall Tanks? point is unclear oryou have other questions not covered here, please call ourtoll-free Customer Service number 800-422-2525
<br />[A] A minimum of 13" clearance all the way around the valve is necessary for float motion and proper operation. This is of for more information.
<br />particular importance in double wall tanks with product fill risers, vapor return risers and gauges grouped closely on the
<br />manway. Check for proper clearance or follow the instructions for valve alignment. 1 © whatis it?
<br />Al Owners and operators of underground fuel storage systems are faced with the challenge of reducing the economic and
<br />21© Can UST's be tested? [environmental impact of overfills and spills that may occur during product delivery.
<br />Yes. Periodically, UST are tightness tested using various techniques. Some of these procedures require or recommend The primary means of preventing overfills and spills atfuel storage sites is the effective training and management of
<br />removal of the tightfill drop tube for product mixing, temperature equalization, etc. delivery personnel, and effective operating procedures to assure safe and efficient operations.
<br />The OPW 61 -SO may be easily removed from the UST by removing the tight fill cap and adaptor and pulling the tube straight The OPW 61 -SO is designed to complementthe effective management of the fuel delivery process to help meet the goals of
<br />up. The float retracts automatically into its recess during removal. reducing the impact of overfills and spills.
<br />Aftertank testing, the OPW 61 -SO is easily re -installed by holding the float in its recess and inserting it back into the riser. The OPW 61 -SO is a valve that is designed to be installed as part of a newtight fill drop tube within the 4" fill riser pipe of
<br />Under no circumstances should the OPW 61 -SO be disassembled, modified or altered for tank testing UST systems.
<br />Once properly assembled following the detailed easily understood instructions provided with each unit, the 0 P 61 -SO is
<br />easy to install simply by removing the old fill tube and replacing it with the OPW 61 -SO.
<br />22 © There's atleast one other overfill valve on the U.S. market today. How does it No excavation or special manholes are required, making it ideal for retrofit into existing locations that may already have a spill
<br />compare to the OPW 61 -SO? containment device installed.
<br />FAILets see. -1 • • 2How does it work?
<br />OVERFILL VALVE COMPARISONA The OPW 61 -SO is a two stage shut-off valve. It is activated directly by liquid level rising in the UST. Under normal delivery
<br />Feature OPW 61 -SO Emco A1000 conditions the float remains in the ready position and the valve is locked fully OPEN. A deflector protects the valve from
<br />gauge sticks and helps streamline the liquid flow past the valve. Normally, the delivery attendant is totally unaware that the
<br />A. Fully automatic operation Yes No 61 -SO is installed in the tank. (See Figure, Page 3.)
<br />B. Automatic hose drain Yes No Gauging, connection, delivery of fuel into the UST and disconnect proceed as normal.
<br />C. Provides shut-off atflow rates below 150 gpm Yes No However, should the UST be accidentally or intentionally overfilled, the OPW 61 -SO works to limitthe liquid level and help
<br />D. Easy removal fortank test Yes No prevent an overfill. If and when the liquid level rises to within about 8" of the top of the UST (95% of capacity in an 8' diameter,
<br />E. Allows gauge stick access Yes Yes 8,000 gallon tank) the float of the OPW 61 -SO rises. This unlocks the internal cam mechanism in the valve, moving the valve
<br />F. Retrofits onto existing UST riser pipes Yes No poppet slightly outward into the liquid flow stream moving down the fill tube. The liquid engages the valve and closes it rapidly. A
<br />G. May use standard manhole Yes No small surge relief valve opens momentarilyto reduce the amount of hydraulic shock created.
<br />H. Will install in OPW #1 Yes No
<br />I. Simple installation requiring no excavation Yes No 3 A Is closing shock normal?
<br />K. Flow rate loss, approx. 10% to 15% 10% to 15% Alminimize
<br />Yes, a small amount of closing shock is part of the normal operation of the valve. The OPW 61 -SO has been designed to
<br />L. Maximum bury depth, standard package Winches 51 inches the amount of hydraulic shock upon closing, this is the purpose of the surge relief valve. Little of the shock
<br />pressure reaches the delivery transport as dissipation in the delivery hose occurs rapidly.
<br />Some "hose kick" is normal, and serves as a signal to the delivery attendant to stop the filling process. The alert, attentive
<br />FOR COMPLETE ASSEMBLY AND INSTALLATION INSTRUCTIONS REFER TO C -3557 -PA INSTRUCTIONS, AVAILABLE transport driver, trained to know how to recognize these signs, will act properly and close his delivery valve to stop the filling
<br />BY CONTACTING DPW, OR YOUR DPW DISTRIBUTOR. process.
<br />4© As a transport driver, what can I expect?
<br />If you're delivering fuel into a UST equipped with an OPW 61 -SO, and the product level should reach Level "A", you can
<br />expect the valve to close. You will notice:
<br />• A clicking sound.
<br />- - Fueling Components Group • The hose will "kick" slightly.
<br />9 p p •Flow rate into the tank will be reduced dramatically.
<br />P.O. BOX 405003 • CINCINNATI, OHIO 45240-5003 • • These are your signals to close the delivery valve on the transport. Wait for the hose to drain by observing the sight glass,
<br />TELEPHONE (513) 870-3219 make your disconnects, at the transport first, and startto walk the hose down, draining residual product into the UST.
<br />OR 1-800-422-2525
<br />By the time you disconnect the hose from the elbow, and the elbow from the tight fill adaptor, and store your equipment on
<br />the transport you can return to the fill opening to "stick" the tank and check your delivery.
<br />Remember that the 0 P 61 -SO is thereto help protect the environment, reduce your liability for spills and help you do your
<br />job even better.
<br />© COPYRIGHT 1988 DOVER CORP./OPW DIVISION - 4 - PRINTED IN U.S.A. _ 1
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