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TM SERIES 251 wide-arch expansion joints The PROCO Series 251 Wide-Arch Expansion Joint is interchangeable with and re-Absorbs Pipe-Wall And Fluid-Borne Noise. The quiet-operating PROCO Series 251 is places handmade spool-type and spherical expansion joints. Installed between thea replacement for "sound transmitting" metallic expansion joints and hose. Pipe-Wall anchor points of a piping system or next to mechanical equipment such as: Pumps,sound loses energy and is absorbed as the noise carried by the piping both enters and Chillers, Cooling Towers, Compressors, Blowers, Fans, Absorption Machines, etc.;leaves the rubber section. Fluid-Borne noise is absorbed by the volumetric expansion specify the PROCO Series 251 to: (1) Absorb Pipe Movement/Stress, (2) Reduce Sys-(breathing) of the connector. This action cushions water hammer, and smooths out tem Noise, (3) Isolate Mechanical Vibration, (4) Compensate Alignment/Offset, (5)pumping impulses. Eliminate Electrolysis, (6) Protect Against Start-Up/Surge Forces. The PROCO Series Isolates Vibrations And Motion. Vibration originating from mechanical equipment is ab- 251 is engineered for tough, demanding, industrial and commercial applications, as sorbed by the PROCO Series 251. Rubber connectors should be installed right after and found in: Air Conditioning-Heating and Ventilating Systems, Chemical-Petrochemical ahead of the equipment generating the vibration, thus isolating the equipment. As most and Industrial Process Piping Systems, Power Generating Plants, Steel Mills, Marine machinery vibrates in a radial direction from the main shaft, for optimum performance the Services, Pulp/Paper Systems, Water-Wastewater-Sewage and Pollution Control Sys- PROCO connector should be installed horizontally and parallel to this shaft. Vertical and tems, where metallic joints/hose or old design rubber expansion joints may have been perpendicular installations are acceptable as the PROCO Wide-Arch will accept both axial previously used or specified. Our history in the manufacture of expansion joint prod- and lateral movements and vibrations. Installation of the Series 251 in a system enables ucts dates back to 1930. PROCO Products is a member of the Rubber Expansion Joint isolated equipment to move freely on its vibration mountings. Note: For maximum vibra- Division, Fluid Sealing Association. When you need an engineered rubber solution to a tion transmission reduction the piping section beyond the rubber connector must be piping system problem, call PROCO. anchored or sufficiently rigid. In the early 1930's, the U.S. Rubber Company invented the spool-type rubber expansion Chemical Or Abrasive Service Capability At Minimal Cost. Expensive, exotic metal ex- joint. In 1968, the spherical-type rubber expansion joint was introduced by The Metraflex pansion joints for chemical service can be replaced with the PROCO Series 251. High Company. Today, most makers of expansion joints use similar designs for their standard pressure molded with low-cost chemical resistant elastomers such as: Chlorobutyl, EPDM, products. Both designs, spherical and spool-type, had certain strengths and weaknesses. Hypalon�, Neoprene and Nitrile; assures a rubber expansion joint compatible with the Combining the best design features of the sphere/spool-type with sophisticated manufac- fluid being pumped or piped. (See Table 1) Our Neoprene products should be specified turing technology; PROCO has developed the Series 251 Wide-Arch Rubber Expansion when handling abrasive slurries. Use the PROCO"Chemical to Elastomer Guide" tospecify Joint. Here are some of the many advantages of our Series 251: an elastomer for your requirement. Greater Movements: The Series 251 utilizes the spherical long flowing arch for � Reduces System Stress And Strain/Compensate For Misalignment. Rigid attachment of maximum movements, when compared to the narrow high arch of the spool-type de- piping to critical or mechanical equipment can produce excessive loading. Thermal or sign. Self-flushing, this arch is great for slurries and reduces turbulence; eliminating mechanically created strain-stress-shock are cushioned and absorbed with the installa- the need for a "filled arch". tion of a flexible low "force-to-deflect" PROCO Rubber Series 251. The PROCO Wide-Arch Easier Sealing: The Series 251 design utilizes the full-faced rubber/fabric flange ofJoint adds a flexible component that is automatically self-correcting for misalignment cre- � the spool-type joint for a quick and sure seal at the flange when compared to the smallated by structural movements caused by settling, expansion or ground shifts. lip seal of the spherical design. Wide Service Range With Low Cost. Engineered to operate up to 200 PSIG and 250�F, Less Weight: The metal flanges of the spherical design are very heavy when com-the PROCO Series 251 can be specified for a wide range of piping system requirements. � pared to the Series 251 with full-faced rubber flanges and retaining rings. Less weightCompared to competitive products, you will invest less money when specifying the engi- means less freight and ease of installation. neered design, industrial quality PROCO Wide-Arch Expansion Joint. Looks Familiar: From the outside, the Series 251 looks very much like the spool-Large Inventories Mean Same-Day Shipment. We maintain the largest inventory of elas- � type joint your maintenance people have used for years. They are more comfortabletomer expansion joints in the Americas. Every size cataloged item is in stock in several with the proven appearance of the spool-type when compared to the spherical-type.elastomers. We can ship your requirement when you need it. In fact, when it comes to rubber expansion joints, if PROCO doesn't have your requirement ... nobody does! High Pressure With Full Safety Factors. The PROCO Series 251 pressure ratings meet or exceed the requirements of the Rubber Expansion Joint Division, Fluid Sealing Associa-Information � Ordering � Pricing � Delivery. Day or night, weekends and holidays ... tion, for Series A and B. More importantly, our conservative ratings are fully tested andthe PROCO phones are monitored 24 hours around the clock. When you have a based on a minimum of four-to-one safety factor. With competitive products the safetyquestion, you can call us. factor is often calculated, unknown and in one case a published three-to-one. For pressure protection, specify PROCO. Less Turbulence Or Material Entrapment. The molded integral flange of the Series 251 joins the body at a true 90 degree angle. Our product will install snug against the mating pipe flange without voids. Because this flange/body angle is difficult to form, many com- petitors severely radius the edge angle. The resulting void can create flow disturbance, allow for material entrapment or bacteria growth. You can avoid these problems by speci- fying PROCO. Rev. 03 6/99 Table 1: Available Styles � Materials � Temperatures For Specific Elastomer Protecting Piping And Recommendations, See: PROCOTM "Chemical To Elastomer Guide" PROCOTM Type of Elastomer Maximum Branding F.S.A. Equipment Systems Style Cover/ Tube/ Operating Label Material Number Outside Inside Temp. �F Color Class From Stress/Motion 251/BB Butyl Butyl 250� Black STD. III 251/EE EPDM EPDM3 250� Red STD. III INDEPENDENT 251/NH Neoprene Hypalon� 230� Green STD. II DISTRIBUTORSSEALING 251/NN Neoprene Neoprene2 230� Blue STD. II 251/NP Neoprene Nitrile 230� Yellow STD. II Water Environment NATIONALASSOCIATIONOFHOSE � ANDACCESSORIESDISTRIBUTORS Notes: 1. Hypalon� is a trademark of DuPont Dow Elastomers, L.L.C. Federation 2. Material NN meets all requirements of U.S.C.G. Preserving & Enhancing 3. In applications where pressure is less than 15 PSIG, temperature can be increased.the Global Water Environment 4. All products are reinforced with synthetic fabric and wire. M E M B E R
Goodyear Rubber Products
