{"product_id":"dresser-pinned-armored-27-gasket","title":"Dresser Gasket | 27 Buna S | Pinned Armored","description":"\u003c!-- TABS --\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003ch2\u003e\u003cstrong\u003eDresser Gasket — Grade 27 BUNA-S Pinned Armored | Heavy-Duty Armored Gasket for Dresser Style 711 Coupling\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eGrade 27 SBR Compound | Pinned Brass Coil Armor | Maximum Extrusion Resistance | Electrical Continuity | High-Pressure \u0026amp; Restraint Service | Up to 212°F\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #b3122a;\"\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eDresser Grade 27 BUNA-S Pinned Armored Gasket\u003c\/strong\u003e is the heaviest-duty armored gasket in the Grade 27 family. It uses the same BUNA-S (SBR) rubber compound and the same integral brass coil armor as the standard armored gasket, with one additional feature: the armor coil is \u003cstrong\u003emechanically pinned to the gasket body\u003c\/strong\u003e, locking the helix in position under high compressive and hydrostatic load. This pinning prevents the armor from shifting or the rubber from extruding past the coil when the joint sees elevated pressure, thermal cycling, or thrust load — conditions where a standard armored gasket can begin to extrude or lose its electrical contact path over time.\u003c\/p\u003e\n\u003cp\u003ePinned armored gaskets are specified where the joint must do two jobs at once: \u003cstrong\u003emaintain a reliable electrical continuity path\u003c\/strong\u003e for cathodic protection or natural gas service, \u003cstrong\u003eand withstand higher working pressure or restraint loads\u003c\/strong\u003e than a standard armored gasket is rated for. Because the pinned construction holds the seal geometry stable under load, it is the correct selection for high-pressure mains, deep-bury installations, and joints subject to thrust where a standard armored gasket would be marginal.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #b3122a;\"\u003e\u003cstrong\u003eHow Pinned Armored Differs from Standard Armored\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eA \u003cstrong\u003estandard armored gasket\u003c\/strong\u003e carries a continuous elastic brass coil molded into the gasket tip — the coil bites the pipe at both ends to provide electrical continuity, and the rubber on either side seals the joint. A \u003cstrong\u003epinned armored gasket\u003c\/strong\u003e adds mechanical pins that anchor that coil to the gasket body. Under high compression, the pins keep the armor seated and prevent the rubber sealing lip from extruding past the coil. The result is a gasket that retains both its seal integrity and its low-resistance electrical path at pressures and loads beyond the standard armored gasket's comfortable range. For ordinary distribution-pressure joints where electrical continuity is the only special requirement, standard armored is sufficient and more economical; reserve pinned armored for the high-pressure and restraint-critical applications where it is specified.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #b3122a;\"\u003e\u003cstrong\u003eWhen You Need Pinned Armored\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eSpecify pinned armored Grade 27 whenever: (1) the joint requires electrical continuity (cathodic protection or natural gas conductive joint) \u003cem\u003eand\u003c\/em\u003e operates above the working pressure range where a standard armored gasket is rated; (2) the installation is subject to thrust or restraint loads that would tend to extrude a standard gasket; (3) the engineer, utility standard, or coupling manufacturer's submittal calls for pinned armored construction specifically; or (4) you are replacing gaskets in a coupling that originally shipped with pinned armored gaskets. For continuity-only requirements at normal distribution pressure, use standard \u003cstrong\u003eGrade 27 Armored\u003c\/strong\u003e; for joints with no continuity requirement, use plain \u003cstrong\u003eGrade 27\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #b3122a;\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePinned Brass Coil Armor:\u003c\/strong\u003e The integral brass helix is mechanically pinned to the gasket body, locking the armor in position under high compressive and hydrostatic load. Resists shifting and rubber extrusion that can compromise a standard armored gasket at elevated pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Extrusion Resistance:\u003c\/strong\u003e The pinned construction holds the sealing-lip geometry stable under load — the highest extrusion resistance in the Grade 27 gasket line. Correct for high-pressure mains, deep bury, and thrust-restrained joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal-to-Metal Electrical Continuity:\u003c\/strong\u003e Like the standard armored gasket, the coil bites into the pipe surface at both ends as the coupling is tightened, providing a cathodic-protection current path through the coupled joint — retained reliably under high load thanks to the pinned armor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade 27 BUNA-S Base Compound:\u003c\/strong\u003e Same SBR rubber as plain and standard armored Grade 27 — same 212°F temperature rating, same chemical compatibility, same durometer, same White color code. The pinned armor is the only difference from standard armored.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Replacement Geometry:\u003c\/strong\u003e Same nominal sizes, outside diameters, and gasket sections as the corresponding plain and standard armored Grade 27 gaskets — drops into the same Dresser coupling bodies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecified Construction:\u003c\/strong\u003e Where a submittal or utility standard calls for pinned armored specifically, this is the code-compliant gasket. Do not substitute standard armored where pinned is specified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"color: #b3122a;\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #4A4A4F; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 9px 12px; text-align: left;\"\u003eProperty\u003c\/th\u003e\n\u003cth style=\"padding: 9px 12px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003cth style=\"padding: 9px 12px; text-align: left;\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #E1E3E6;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eGasket Grade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e27 Pinned Armored\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eBUNA-S with pinned integral brass coil armor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eRubber Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eSBR – BUNA-S\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eIdentical base compound to plain and standard armored Grade 27\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #E1E3E6;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eArmor Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eBrass coil \/ helix, pinned\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eMolded integral to gasket tip and mechanically pinned to the body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eDistinguishing Feature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003ePinned armor construction\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eMaximum extrusion resistance; holds seal \u0026amp; continuity under high load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #E1E3E6;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eElectrical Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eMetal-to-metal pipe contact at both ends\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eCathodic protection continuity; natural gas conductive joint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e212°F (100°C)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eSame as plain and standard armored Grade 27\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #E1E3E6;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eShore A Durometer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e75 ± 5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003ePer Dresser compound specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eMold\/ID Color Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eWhite\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eSame color as plain and standard armored Grade 27 — confirm grade at order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #E1E3E6;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e\u003cstrong\u003eCompatible Couplings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eStyle 38, Style 40, Style 138, Style 62, and related Dresser bolted coupling families\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eConfirm style and size before ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp style=\"background: #fff3cd; border-left: 4px solid #f59e0b; padding: 12px 16px; font-size: 14px; margin-top: 16px;\"\u003e\u003cstrong\u003ePINNED vs. STANDARD ARMORED vs. PLAIN — COLOR CODE IS IDENTICAL:\u003c\/strong\u003e All three Grade 27 gaskets (plain, armored, and pinned armored) share a White mold color code. Always confirm the exact grade from the part number or product label before installing — not from color alone. Do not substitute standard armored where pinned armored is specified, or vice versa.\u003c\/p\u003e\n\u003cp style=\"background: #E1E3E6; border-left: 4px solid #b3122a; padding: 12px 16px; font-size: 14px; margin-top: 16px;\"\u003e\u003cstrong\u003eNEED STANDARD ARMORED OR PLAIN INSTEAD?\u003c\/strong\u003e For continuity-only joints at normal distribution pressure, see our \u003ca style=\"color: #b3122a;\" href=\"\/products\/27-buna-s-armored-gasket\"\u003e\u003cstrong\u003eGrade 27 Armored gaskets\u003c\/strong\u003e\u003c\/a\u003e. For joints with no electrical continuity requirement, see our \u003ca style=\"color: #b3122a;\" href=\"\/products\/27-buna-s-gasket\"\u003e\u003cstrong\u003eplain Grade 27 gaskets\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"margin-top: 24px; font-size: 13px; color: #666;\"\u003eSeveral sizes in this line are quoted per order. Questions or need a price on a call-for-quote size? Contact us at \u003ca href=\"mailto:sales@watermainsupply.com\"\u003esales@watermainsupply.com\u003c\/a\u003e or call 281.664.8000.\u003c\/p\u003e\n\u003ch5\u003eSubmittal\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/GR27.Gasket.Submittal.DPS.2021.pdf?v=1780103683\" rel=\"noopener\" target=\"_blank\"\u003eGrade 27 Buna-S Gasket Product Submittal\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eTechnical Specifications\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/GasketShelfLifeTechnicalBulletin.pdf?v=1780103810\" rel=\"noopener\" target=\"_blank\"\u003eGasket Shelf Life Technical Bulletin\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eCatalog\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/GasketOverviewDPS2021.pdf?v=1780103809\" rel=\"noopener\" target=\"_blank\"\u003eDresser Gaskets Overview\u003c\/a\u003e\u003c\/p\u003e","brand":"Dresser","offers":[{"title":"2\" (2.000\" OD) \/ 9\/32 x 9\/16 \/ Steel","offer_id":46952742060207,"sku":"3038-0008-023-D","price":128.18,"currency_code":"USD","in_stock":true},{"title":"2\" (2.375\" OD) \/ 1\/2 x 29\/32 \/ Steel","offer_id":46952742092975,"sku":"3038-0012-023-D","price":128.18,"currency_code":"USD","in_stock":true},{"title":"2-1\/2\" (2.875\" OD) \/ 1\/2 x 29\/32 \/ Steel","offer_id":46952742125743,"sku":"3038-0022-023-D","price":128.18,"currency_code":"USD","in_stock":true},{"title":"3\" (3.500\" OD) \/ 1\/2 x 29\/32 \/ Steel","offer_id":46952742158511,"sku":"3038-0026-023-D","price":128.18,"currency_code":"USD","in_stock":true},{"title":"3-1\/2\" (4.000\" OD) \/ 1\/2 x 29\/32 \/ Steel","offer_id":46952742191279,"sku":"3038-0033-023-D","price":237.49,"currency_code":"USD","in_stock":true},{"title":"4\" (4.500\" OD) \/ 1\/2 x 29\/32 \/ Steel","offer_id":46952742224047,"sku":"3038-0036-023-D","price":242.06,"currency_code":"USD","in_stock":true},{"title":"4-1\/2\" (5.000\" OD) \/ 1\/2 x 29\/32 \/ Steel","offer_id":46952742256815,"sku":"3038-0041-023-D","price":246.62,"currency_code":"USD","in_stock":true},{"title":"5\" (5.563\" OD) \/ 1\/2 x 29\/32 \/ Steel","offer_id":46952742289583,"sku":"3038-0047-023-D","price":251.77,"currency_code":"USD","in_stock":true},{"title":"5-5\/8\" CAS (6.000\" OD) \/ 1\/2 x 1 \/ Steel","offer_id":46952742322351,"sku":"3038-0054-023-D","price":255.74,"currency_code":"USD","in_stock":true},{"title":"6\" (6.625\" OD) \/ 1\/2 x 1 \/ Steel","offer_id":46952742355119,"sku":"3038-0057-023-D","price":261.45,"currency_code":"USD","in_stock":true},{"title":"10\" (10.750\" OD) \/ 1\/2 x 1-1\/16 \/ Steel","offer_id":46952742387887,"sku":"3038-0087-023-D","price":299.11,"currency_code":"USD","in_stock":true},{"title":"10\" (10.750\" OD) \/ 5\/8 x 1-3\/16 \/ Steel","offer_id":46952742420655,"sku":"3038-0089-023-D","price":299.11,"currency_code":"USD","in_stock":true},{"title":"12\" (12.750\" OD) \/ 1\/2 x 1-1\/16 \/ Steel","offer_id":46952742453423,"sku":"3038-0100-023-D","price":299.11,"currency_code":"USD","in_stock":true},{"title":"12\" (12.750\" OD) \/ 5\/8 x 1-3\/16 \/ Steel","offer_id":46952742486191,"sku":"3038-0102-023-D","price":299.11,"currency_code":"USD","in_stock":true},{"title":"14\" (14.000\" OD) \/ 1\/2 x 1-1\/8 \/ Steel","offer_id":46952742518959,"sku":"3038-0106-023-D","price":512.82,"currency_code":"USD","in_stock":true},{"title":"14\" (14.000\" OD) \/ 5\/8 x 1-3\/16 \/ Steel","offer_id":46952742551727,"sku":"3038-0110-023-D","price":575.1,"currency_code":"USD","in_stock":true},{"title":"16\" (16.000\" OD) \/ 1\/2 x 1-1\/8 \/ Steel","offer_id":46952742584495,"sku":"3038-0115-023-D","price":512.82,"currency_code":"USD","in_stock":true},{"title":"16\" (16.000\" OD) \/ 5\/8 x 1-3\/16 \/ Steel","offer_id":46952742617263,"sku":"3038-0118-023-D","price":512.82,"currency_code":"USD","in_stock":true},{"title":"18\" (18.000\" OD) \/ 1\/2 x 1-1\/8 \/ Steel","offer_id":46952742650031,"sku":"3038-0129-023-D","price":598.25,"currency_code":"USD","in_stock":true},{"title":"18\" (18.000\" OD) \/ 5\/8 x 1-3\/16 \/ Steel","offer_id":46952742682799,"sku":"3038-0131-023-D","price":726.91,"currency_code":"USD","in_stock":true},{"title":"20\" (20.000\" OD) \/ 1\/2 x 1-1\/8 \/ Steel","offer_id":46952742715567,"sku":"3038-0134-023-D","price":648.29,"currency_code":"USD","in_stock":true},{"title":"20\" (20.000\" OD) \/ 5\/8 x 1-3\/16 \/ Steel","offer_id":46952742748335,"sku":"3038-0136-023-D","price":567.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Dresser_Style_17_Armored_Pinned_Gasket_for_711_Coupling_2.webp?v=1779459613","url":"https:\/\/watermainsupply.com\/products\/dresser-pinned-armored-27-gasket","provider":"Watermainsupply","version":"1.0","type":"link"}