Connecting to industry Fittings for Steam Hose Remember Steam is……… minimum 212 F DPL Catalog Information in the back of the catalog Direct relationship between pressure and temperature of saturated steam. The RMA (Rubber Manufacturers Association) Has designated Steam the most potentially dangerous of all materials that is handled through a hose assembly. As such, it carries a Safety Requirement Factor of 10 to 1. Dixon …… in keeping with the RMA’s recommended Safety Factors, has approved for Steam Service, only a handful of products for use with Steam Hose. WARNING ……. NEVER use any Dixon fitting, or accessory item for Steam Service unless Dixon Valve & Coupling Company has expressly approved it for such service ! The Boss System for steam service The Boss System • Available from ¼” through 6” • Good for up to 450 degrees F • Available in Steel, Iron, Stainless Steel, and Brass. Boss Male Stems 1” ID & smaller is machined bar stock steel with standard barbed stem. 1 ¼” ID & larger is cast iron with “Cor-O-Zig” impression shank. Boss Male Stems Male NPT Thread Heavy Duty Hex Nut Boss Clamping Collar Boss Washer Style Female Clamp collar Flat surface Flat surface on hose stem on spud Flat Washer Boss Female Ground Joint Boss Rounded Rounded head clamping seat in spud on hose stem collar Boss Accessories for steam service LP Boss Male Stem Female Wing Nut Adapter Cap Female Spud Male Adapter Double Spud Washer Male Spud Boss Hose Mender Cold Flow … … is a phenomena related to rubber (elastomers). Rubber moves away from points of stress! Pressure and heat intensify the Cold Flow movement. Since steam presents both pressure as well as heat, it becomes very important in choosing the proper means of clamping the assembly. Boss Clamps Gripping fingers to engage Boss collar on hose stem Nuts & Bolts to retighten the clamp as needed. Multi-section design for “even” take-up Clamp sections do not touch …. plenty of room for adjustment. Clamp fingers properly engage Warning label fitting Boss installed. clamping collar. Clamp sections touching each other. Clamp fingers “bottomed out” on neck of fitting. No warning label Boss Clamps Torque values on the nuts & bolts of the Boss clamps will vary by size. Torque values in Foot Pounds can be found in the Boss Clamp section of the Dixon DPL Catalog. DPL Catalog Boss Section Hose ID size Information can Hose OD be found for both range Torque clamp sizing, and for torque ratings on nuts & bolts. STEAM Quick Disconnects WARNING: Do not disconnect under pressure STEAM Quick Disconnects • Rated to a maximum of 100 psi saturated steam (338 degrees F). • Spring loaded safety shut-off valve in both the plug and the coupler. • Large gripping collar on sleeve of the coupler for ease of handling with gloves on. • Available ¼” through 1 ½” sizes. STEAM Quick Disconnects are Female NPT threaded ….. In order to be properly used in Steam Service they must be threaded onto a “Boss” male that has been secured in the hose with a “Boss” clamp ! STEAM Quick Disconnects In order to properly drain a steam hose assembly that has valve type fittings, you have two options available: • Allow media to completely cool. Completely remove the valved Quick Disconnects and drain the water. • Allow media to completely cool. Insert a spare plug into the coupler end of the assembly, and roll the hose towards the open end to drain the water. Are there any questions?
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