PHONE: (800) 547-9393 • (513) 696-1500 • Fax: (800) 245-8536 • (513) 932-9845 Printed in USA 9/08 2726 Henkle Drive • Lebanon, OH 45036 • www.opw-es.com © Copyright 2008, OPW Engineered Systems 21 T O P L O A D I N G V A P O R R E C O V E R Y Hatch Cover Vapor Plates Hatch cover vapor plates are used to retain and recover harmful vapors and avoid excessive splashing (especially on tank wash arms). They also are used to prevent dirt, moisture, insects, and foreign objects from entering the tank. Features • Can be configured many ways, including dry-break couplings • Made of steel, stainless steel or aluminum • Can be added to the arm when needed • Long-lasting, durable construction Hatch Cover Vapor Plates Tapered Hatch Seal Piggyback Style Arm This simple design is highly functional. It has a vapor line welded to the product arm. The versatile arm also can serve as an unloader by using the “vapor” line to pressurize a railcar or tank truck equipped with a permanent deep pipe. Dual Arm / Siamese Configuration The most widely used vapor-recovery assembly style, this system features separate arms for product and vapor that are joined together at the inner boom structure. One of the more popular variations of this design also has the two counterbalance swivels and the outer arms joined together in a side-by-side arrangement to minimize the overall vertical dimension of the outboard assembly. On most dual-arm designs, the product line feeds from beneath and the vapor line from overhead. When loading tank trucks and railcars equipped with permanent product and vapor connections, the end fittings on the loading arm are typically quickdisconnect couplings, unions, or flanges. The Drylok™ coupler system can be outfitted for use on dual-arm and Siamese configurations. Special Requirements OPW Engineered Systems vapor-recovery loading and unloading solutions can be steam jacketed or traced, equipped with automatic shut-off controls, or outfitted with whatever additional equipment may be required for your particular application. Please contact OPW at 1-800-547-9393 with special requirements. Open Dome Loading OPW Engineered Systems offers a wide variety of vapor-recovery components for applications where loading takes place through an open dome. These include cover plates, tapered hatch plugs/cones, and the OPW inflatable hatch seal. OPW Engineered Systems vapor-recovery assemblies are available in 2", 3", 4", and 6". They also are available in steel, stainless steel, aluminum, and specialty alloys. Please consult the factory with your specifications and we will design a vapor-recovery loading system to meet your needs.
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