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PRODUCT

98 Series Relief Valve or Backpressure Regulator

98 Series is used for backpressure or relief applications in liquid, gas, air, and steam service. Types 98L, 98H, and 98HH are direct-operated and spring-loaded. Types 98LD and 98HD use additional pressure loading to maintain relief differential pressures, backpressures or for remote set point adjustment.

Type 98HM is a direct-operated, spring to close regulator for backpressure or relief applications in liquid, gas, or steam service. The regulator requires no external power to operate and features a sensing line connection for sensing pressure externally from the regulator. A seal washer for the set screw can be included when applications require pressure loading of the spring case (not available on NPS 1-1/2 and 2 bodies / DN 40 and 50).

CAD Drawings and Models: Click Here

DocumentationFeatures & BenefitsSpecifications
 Product & Service Documentation
 Brochures
 Clean Coal Technology Industry Solution
218 KBpdfMay 2010A
English
 Complete Clean Pressure Regulation Solution Flier
561 KBpdfDecember 2010A
English
 Industrial Plant App Map 11x17
1 MBpdfJuly 2013G
English
 Liquids Application Map
572 KBpdfMay 2008B
English
 Process Gases Application Map
703 KBpdfMay 2008B
English
 Data Sheets - Bulletins - Catalogs
 98 Series Backpressure and Relief Valves Bulletin
1 MBpdfNovember 2009M
English
 Regulators Mini Catalog
10 MBpdfNovember 2013F
English
 Drawings & Schematics
 98H Backpressure Regulator / Relief Valve Schematic
797 KBpdfJanuary 2007A
English
 98HD Differential Pressure Relief Valve Schematic
692 KBpdfOctober 2006C
English
 98HM Backpressure / Relief Valve Schematic
477 KBpdfOctober 2008A
English
 Manuals & Guides
 98H, 98HD Installation Guide
388 KBpdfSeptember 2005F
English
 98HH Backpressure and Relief Valves Instruction Manual
462 KBpdfSeptember 2008F
English
 98HH Installation Guide
852 KBpdfMay 2002D
English
 98L and 98H Backpressure Regulators and Relief Valves Instruction Manual
995 KBpdfMarch 2014G
English
 98L, 98LD Installation Guide
1 MBpdfMay 2002D
English
 98LD and 98HD Differential Pressure Relief Valve Instruction Manual
814 KBpdfSeptember 2008F
English