Experience Counts!   LineBacker® 61™ NSF Certified Flange Isolation Kits Description Typical Application Benefits/Features Specifications Warranty Installation How to Order Typical Specification Resources Corporate Description LineBacker® sealing gaskets utilize a rectangular sealing element, referred to as a “quad” ring, in combination with a unique groove design to effectively seal and isolate flanges for all types of applications. Used and proven, for over 40 years, in the water and energy industry’s - LineBacker® gaskets have been effectively sealing flanges within piping systems carrying potable water and other fluids in high/low temperature extremes - at high pressure ratings. Of particular importance with respect to NSF/ANSI Standard 61, is the micro-exposure of the sealing element (EPDM) within the G-10 Epoxy Glass retainer material. In addition to providing positive sealing characteristics relative to the fluid flowing within the pipe, the seal element is also protected from deterioration by atmospheric conditions which dramatically lengthens the service life of the gasket. NSF/ANSI Standard 61 establishes minimum health effects requirements for the chemical contaminants and impurities that may be indirectly imparted to drinking water. The LinkBacker® 61™ Sealing/Isolating gasket meets all criteria associated with NSF health effects testing, certification and production facility inspections. PSI’s registration confirms that NSF has assessed and certified the LineBacker® 61™ as conforming with the relevant NSF standards. For more information regarding NSF, visit www.nsf.org. Before Tightening The flange faces come into contact with the sealing elements, which extend slightly above the surface of the retainer. As the flange is tightened the sealing elements are compressed and move sideways into the inclined portion of the groove, developing a high unit pressure against the flange faces. After Tightening The flange faces have come into firm contact with the retainer, thus encapsulating the sealing elements within grooves. At the same time, the unique LineBacker seal configuration provides elastic memory for elastomers not normally associated with this characteristic - resulting in a simple flat gasket with extremely high loading and self energizing characteristics without adverse cold flow problems. TYPE "E" GASKET The gasket retainer extends out to the O.D. of the flange. Holes are cut in a type "E" gasket at the bolt circle to accommodate threaded studs or bolts. TYPE "F" GASKET The gasket retainer extends out to the I.D. of the bolt circle. Benefits/Features Eliminates flange leaks. Guards against blowouts. Usable with any type of flange or combination of flanges. Lowest possible clamp and compressive load to effect a seal. Insulating version is both a positive seal and a superior isolator. High dielectric strength. Water absorption less than 0.10%. All standard ANSI and API flange sizes from 1/2" and above. Temperature Range: Cryogenic to +280°F. (+138°C.) Common LineBacker® 61™ Sealing Gasket Physical Properties Retainer Physical Properties ASTM TEST METHOD G-10 EPOXY GLASS D149 Dielectric Strength Volts/Mil (Short Time) 550 D695 Compressive Strength (psi) 50,000 D229 Water Absorbtion (%) 0.10 D257 Insulation Resistance Meg Ohms 200,000 D790 Flexural Strength (psi) 60,000 D785 Hardness Rockwell "M" 115 D256 IZOD Impact Strength (Ft-Lbs/Inch) 14.0 D638 Tensile Strength (psi) 45,000 D732 Shear Strength (psi) 22,000 Temperature Range Cryogenic to +280°F. Cryogenic to +138°C. Seal Element Physical Properties Temperature Range EPDM Temperature Range (F.) -65 to +300°F. Temperature Range (C.) -54 to +149°C. Warranty All products are warranted against failure caused by manufacturing defects for a period of one year. Any product found to be so defective and returned within one year from date of shipment will be replaced without charge. The above warranty is made in lieu of, and we disclaim, any and all other warranties, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, and buyer agrees to accept the products without any such warranties. We hereby disclaim any obligation or liability for consequential damages, labor costs or any other claims or liabilities of any kind whatsoever. Installation Open packaging to inspect and determine that components are as specified. Check the gasket I.D. It should be no greater than the flange I.D. Flanges shall be free of pits, gouges, rust, debris, oil and grease. Surface finish shall be no greater than 250 RMS. Refinish flange faces if corrective measures do not meet the foregoing. Check flange and bolt hole spot facings for burrs, etc… and clear from facings. Check bolts and nuts and clean. Apply non-conductive lubricant to all threads and flange side of nuts. Align flanges so they are concentric and parallel and install gasket carefully. USE NO LUBRICANT, GREASE OR ADHESIVES ON EITHER THE GASKET OR FLANGE FACES, Guard against damaging sealing element. Line up bolt holes with non-tapered drift pins using three at 120° degrees separation (particularly large flanges), or at least two at 180° degrees separation. Insert studs, nuts and washers, placing lubricated face of nut next to steel washer (this will help to reduce galling of the insulating washer on flange, should the whole bolt assembly rotate). Galling: If serious galling of insulating washers persists, replace with high strength washers. (minimum 50K psi or greater). Initially cross-tighten bolts until flange to gasket contact has been made. Check for a flange segment that may show a gap or separation between gasket and flanges, using flashlight, calipers, or feeler gauge. If one exists, the flanges are not parallel. Directly 180° degrees opposite widest part of indicated gap, loosen nuts, even if only finger tight, one or more turns. Return to segment with gap and tighten until both flanges are in contact with gasket retainer. This procedure is necessary to prevent restriction of flange rotation over the fulcrum formed by the outer edge of the two raised faces at points in contact with gasket retainer. The restriction will cause exceptionally high flange to gasket clamp loading at this point, with possible damage to gasket retainer, PLUS diverting necessary clamp loading bolt torque energy to correcting alignment on the opposite segment. Re-tighten loosened nuts and proceed with torqueing of the bolts according to PSI diagram, to 10-15% of specified torque. Remove drift pins and replace with bolts, nuts and washers, tightened to the same values as others in place. Repeat torque sequence, increasing to 50% of balance. Repeat tightening to final torque. Optional – it is always a good policy to go completely around flange checking bolt to bolt for proper torque, particularly on large diameter piping systems. All the above should be done with torque wrenches (mechanical and hydraulic) or with a stud tension measuring device. Always wear appropriate safety equipment! Important: Check gasket for flange type on which to be used (ie). Slip or weld-neck etc…If in doubt do not install, consult supplier or PSI. To provide even sealing pressure on a flange gasket it is recommended that the bolts be “snugged” up in the sequence shown on chart until the flange faces are in contact with the gasket. After the flange faces are in contact with the gasket firmly tighten the bolts in the same sequence. Note: Although this diagram shows 24 bolts, the same basic procedure should be used with flanges having more or less bolts. When installing gaskets made of compressible dielectric material and tightened cold; “hot flow” of the gasket material may occur under operating conditions, resulting in loss of bolt pressure. It is advisable therefore, to re-tighten bolts after operating temperature has been reached – preferably at zero line pressure and ambient temperature. Under no circumstances should the system be allowed to return to operating temperature after the initial cycling to ambient temperature without checking and re-tightening bolts where needed. Suggested torque values for PSI sealing gaskets. How To Order To order LineBacker® 61™ Sealing/Isolating Flange Isolation Kits please indicate the following: Quantity Nominal Pipe Size Pressure Rating Gasket Type: E or F Gasket Style: LineBacker® 61™ Retainer Material: G-10 Epoxy Glass Sealing Element: EPDM Weld neck or slip-on application Note all special requirements. Contact your local distributor or Pipeline Seal & Insulator, Inc. Distributor Locator Contact PSI Typical Specification NSF 61 Flange Gasket Specification Materials for flange isolation kits on pipes containing drinking/potable water (up to 280ºF, 138ºC) shall consist of the following components: Isolating and Sealing Gasket The full faced, NSF 61 certified, isolating and sealing gasket shall be LineBacker® 61™ Sealing Gasket (LB61) - Type “E”, 1/8” thick, G-10 retainer containing a precision tapered groove to accommodate the controlled compression of a EPDM quad-ring sealing element. Sealing element placement shall accommodate either flat, raised face or RTJ flanges. The quad-ring seal shall be pressure energized. The G-10 retainer shall have a 550 volts/mil dielectric strength and a minimum 50,000 psi compressive strength. The full faced flange isolating gasket (weld-neck) shall be equal to or slightly smaller than the bore of the flange; (slip-on) shall be equal to or smaller than the I.D. of mating pipe. Full Length Bolt Isolating Sleeves One full length G-10 sleeve (extending half way into both steel washers) for each flange bolt. The G-10 shall be a 1/32 inch thick tube with a 400 volts/mil dielectric strength and water absorption of 0.10% or less. Washers Two, 1/8 inch thick, G-10 isolating washers for each bolt. Their compressive strength shall be 50,000 psi, dielectric strength 550 volts/mil and water absorption 0.10% or less. Two, 1/8 inch thick zinc plated, hot rolled steel washers for each bolt. The I.D. of all washers shall fit over the isolating sleeve and both the steel and isolating washers shall have a same I.D. and O.D. Quality - (Made in U.S.A - A.R.R.A Complaint) Flange isolating kits shall be manufactured at a facility that has a registered ISO 9001:2008 Quality Management System. Submittals shall include copy of valid ISO registration and NSF 61 certification. Availability Kits shall be manufactured by PSI-Pipeline Seal and Insulator, Inc., Houston, Texas, U.S.A. Alternate products should be submitted to an engineer 10 days prior to bid due date. Telephone: 713-747-6948 Facsimile: 713-747-6029 www.pipelineseal.com e-mail: info@psipsi.com. Performance suitability and material compatibility shall be determined by the user. Resources Literature LineBacker® 61™ Literature in PDF Format Corporate Information Pipeline Seal and Insulator, Inc. 6525 Goforth Street, Houston, TX 77021 U.S.A. Telephone: 713-747-6948 • Toll Free: 800-423-2410 Facsimile: 713-747-6029 • e-mail: info@psipsi.com