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Fittings recommended for ….. Steam Hose Assemblies Remember Steam is ……… Minimum 212 F DPL Catalog Information page in back of catalog (#476) Direct relationship between pressure and temperature of saturated steam. You have a saturated steam application @ 372 F. What is the line pressure? 163 psi You have a saturated steam application @ 244 psi. What is the temperature of the steam? 404 F. 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 ! Page #63 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 malleable iron with “Cor-O-Zig” impression shank. Boss Male Stems Male NPT Thread Boss Clamping Collar Heavy Duty Hex Nut Boss Washer Style Female Flat surface on spud Flat Washer Flat surface on hose stem Clamp collar Boss Female Ground Joint Rounded seat in spud Rounded head on hose stem Boss clamping collar Name the two different styles of Boss Female Couplings. Female Washer Style & Female Ground Joint Style Standard Boss Accessories LP Boss Male Stem Boss Hose Mender Double Spud Washer Male Spud Female Spud Wing Nut Cap Female Adapter Male Adapter For STEAM SERVICE 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 Nuts & Bolts to retighten the clamp as needed. Gripping fingers to engage Boss collar on hose stem Multi-section design for “even” take-up Clamp fingers properly engage fitting Boss clamping collar. Clamp sections do not touch …. plenty of room for adjustment. Warning label installed. Clamp fingers “bottomed out” on neck of fitting. Clamp sections touching each other. 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 Clamp Section Information can be found for both clamp sizing, and for torque ratings on nuts & bolts. Hose I.D. Size Hose O.D. Range Torque Values What is the means of tightening a Boss Clamp? Nuts & Bolts How tight do I torque the nuts & bolts on a Boss Clamp? To the torque ratings found in the Boss Clamp section of the Dixon DPL Catalog. 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. So ….. Whadda ya’ know? What is the maximum pressure and temperature that the STEAM Quick Disconnects can be used at? 100 psi @ 338 degrees F. Can the STEAM Quick Disconnect be directly inserted into the hose end? NO ….. It is female threaded and must be used with a “Boss” male. Are there any questions?