HRGS-D - Product variants

HRGS-DC
Gas-buffered double seal. The HRGS-DC is designed for applications involving fitting dimensions in line with DIN 24960 C or ANSI Big Bore standard, but can also be used even when the fitting dimensions are not of standardized nature if large, open spaces are available for installation. The CGSH is used as outboard seal up to nominal width 125.

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HRGS-DD
Acc. to API 682 configuration 3NC-FB, API Plan 74. The HRGS-DD corresponds to the HRGS-DC in terms of design principal and materials. It is designed for applications involving large shaft diameters of up to 200 mm (7.87") or fairly high pressure levels of up to 40 bar (580 PSI). The outboard seal used in such cases is the DGS.

{u'ApplicationOperationalArea': '<ul class="SGBulletList">\n<li>Pumps</li>\n</ul>', u'IDProductItem': '600', u'IDProductInfo': '2175', u'StructureLevel': 'Section', u'OperatingLimits': 'Shaft diameter: \xc2\xb1dw = 20 ... 200 mm (0.787"... 7.874") \nPressure HRGS-DC: p1 = ... 22 bar (319 PSI) \np3 = ... 25 bar (363 PSI) \nPressure HRGS-DD: p1 = ... 40 bar (580 PSI) \np3 = ... 43 bar (624 PSI) \nOperating temperature limits for: \nEPDM -20 \xc2\xb0C \xe2\x80\xa6 +140 \xc2\xb0C (-4 \xc2\xb0F ... +284 \xc2\xb0F) \nFFKM -20 \xc2\xb0C \xe2\x80\xa6 +120 \xc2\xb0C (-4 \xc2\xb0F ... 248 \xc2\xb0F) \nFKM -20 \xc2\xb0C \xe2\x80\xa6 +170 \xc2\xb0C (-4 \xc2\xb0F ... 338 \xc2\xb0F) \nSliding velocity: vg = 4 ... 25 m/s (13 ... 82 ft/s) \nDifferential pressure \xce\x94p = min. 3 bar (44 PSI), max. 16 bar (232 PSI) (internal pressure)', u'Note': '', u'TechnicalData': '<ul class="SGBulletList">\n<li>Double seal</li>\n<li>Balanced</li>\n<li>Standard version with U-grooves (bi-directional)</li>\n<li>Gas-lubricated</li>\n</ul>', u'Online': 'true', u'DrawingProduct': 'None', u'Level2ProductGroup_Group': '', u'ProductDomain': 'None', u'IDProductItemH': '556', u'Description': '', u'TorqueTransmission': '', u'GenerateMeasurement': '', u'InquiryClass': '', u'MailRecipient': '', u'Level1ProductRange_Range': '', u'DrawingInstallation': '', u'Level3ProductSection_Section': 'None', u'IDInquiryClass': '', u'RecipientPhone': '', u'SupplySystem': '', u'SeatAlternative': '', u'Language': 'en-US', u'MediaResistance': '', u'DescriptionHeader': '', u'RecipientName': '', u'Position': '5', u'ApplicationBranch': '<ul class="SGBulletList">\n<li>Chemical industry</li>\n<li>Refining technology</li>\n</ul>', u'DimensionHeader': '', u'Dimension': 'Dimensions on request.', u'UID': '4fae124fe79f5548f1086c61cb4d295c', u'TechnicalDiagram': '', u'Features': '', u'Certification': '', u'DescriptionText': 'The HRGS-D is the gas-lubricated version of the HR. An open sealing compartment is ideal for this concept. Rotating seat located directly behind the pump impeller, springs outside of the product. Very well suited to applications involving media containing solids. Does not open on pressure reversal. Two variants available, depending on the sealing pressure and shaft diameter involved.', u'SealCodes': '', u'MaterialCombination': 'Product side (HRGS-DC, HRGS-DD): \nSeal face: Silicon carbide (Q19, Q29) \nSeat: Silicon carbide (Q1, Q2) \n \nAtmosphere side HRGS-DC: \nSeal face: Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B) \nSeat: Silicon carbide (Q1, Q2) \n \nAtmosphere side HRGS-DD: \nSeal face: Silicon carbide (Q19, Q29) \nSeat: Silicon carbide (Q1, Q2) \n \nSprings: CrNiMo steel (G), Hastelloy\xc2\xae C-4 (M) \nMetal parts: CrNiMo steel (G), Hastelloy\xc2\xae C-4 (M)', u'ProductVariant': 'None', u'ProductName': 'HRGS-D', u'ArticleNumber': '', u'SupplyForm': '', u'IDSealDrawing': '', u'PageHeader': 'HRGS-D', u'ApplicationMedia': '<ul class="SGBulletList">\n<li>Gases and liquids</li>\n<li>Media which require high purity</li>\n<li>Environmental harmful media</li>\n</ul>', u'DescriptionList': '<ul class="SGBulletList">\n<li>Contact-free operation</li>\n<li>Suitable for solids containing media</li>\n<li>Internally pressurized</li>\n<li>Cartridge unit</li>\n<li>Does not open in the event of buffer pressure failure, self closing at pressure reversal</li>\n<li>HR principle with rotating seat</li>\n<li>No friction on the seal faces, no heat generated at the seal or in the medium</li>\n</ul>'}