Round Butterfly Dampers

 

All valves are custom made with additional sizes available upon request.

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2000-Product-Spreadsheet

ANSI Class Wafer (2000)

  • Sizes to 66″
  • Design is to bolt between 125/150# flanges

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2100-Product-Spreadsheet

Ductwork Drilled – Medium Duty (2100)

The 2100 series is a standard damper furnished in sizes 4″ to 48″ for all medium duty services. Materials and specifications are shown below. If other dimensions or service conditions are required other than shown, contact the factory or your closest Shan-Rod representative.

  • Body, Disc & Flange: Standard – Carbon Steel, Optional – 304
  • Drilling: Ductwork
  • Shaft: Standard – 304 S/S
  • Bushings: Carbon/Graphite
  • Packing Follower: Standard – 304 S/S
  • Stuffing Box Housing: Standard – Carbon Steel, Optional – 304 S/S
  • Available from stock 4″ to 48″
  • Static pressures to 20 PSIG

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2200-Product-Spreadsheet

ANSI Fabricated Wafer (2200)

The 2200 series fabricated wafer damper is constructed to fit between 125/150# ANSI flanges. Locating holes are provided to center damper in the pipeline. Flange stiffeners are provided depending on damper size & service conditions. Flange faces are standard mil finish. Machined/ serrated flanges can be provided as an option. Materials of construction are identical to the 2400 series. Damper can be supplied in all weldable materials.

  • Sizes to 72″
  • Static pressures to 50 PSIG

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2300-Product-Spreadsheet

ANSI Drilled – Heavy Duty (2300)

The 2300 series fabricated damper is constructed to bolt up to ANSI drilled flanges. Each flange is individually bolted to adjacent flange on duct/pipe. Flange stiffeners are provided depending on damper size and service conditions. Flange faces are standard mill finish. Machined/serrated flanges can be provided as an option. Materials of construction are identical to the 2400 series. Damper can be supplied in all weldable materials.

  • Sizes to 144″
  • Static pressures to 50 PSIG
  • Flanged design. Rate flanges furnished for any ANSI drilling.

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2400-Product-Spreadsheet

Ductwork Drilled – Heavy Duty (2400)

The 2400 series consists of a fabricated carbon steel body furnished with flanges drilled for bolting to rolled angle companion flanges or with no drilling for thru bolting between 125/150 ANSI flanges (wafer) design, fabricated carbon steel disc, 304 stainless stub end shafts, graphitar lantern gland, lubricated stuffing boxes with alemite purge fittings, conventional swing thru seat design.

  • Sizes to 144″
  • Static pressures to 50 PSIG
  • Designed for bolting to ductwork flanges

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2500-Product-Spreadsheet

ANSI Class “Lugged” Wafer (2500)

  • BODY – Durable, solid ring type body is machined for accurate disc alignment. Standard body wall thicknesses vary according to static pressure and flange rating. Body is designed to with-stand stresses imposed upon it, through pipe flanges.
  • DISC – Fabricated type are precision machined and specially finished tolerances prevent shaft distortion and disc misalign-ment. Ample metal is provided in the hub to maintain rigidity and strength of the disc and its components.
  • SHAFTS – One piece or stub shafts.
  • BUSHINGS – Standard bushing materials are carbon/graphite or GR.GRZ. Other types of bushing materials are available for specific applications.
  • FLANGE BOLTS HOLES – Holes are located in valve body where optimum strength requirements provide maximum support to the total valve assembly. Two or four body holes are dimensioned according to USAS Code flange standards depending on valve size.
  • Sizes to 72″

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2700-Product-Spreadsheet

Weld-In – Heavy Duty (2700)

The 2700 series fabricated weld end damper is constructed to be welded in between (2) two duct or pipe sections. Body stiffeners are provided depending on damper size and service conditions. Two (2) types of weld ends are offered. The standard 371/2° bevel and the stub end flange for ease of fit-up. Materials of construction are identical to the 2400 series. Damper can be supplied in all weldable materials.

  • Sizes to 144″
  • Static pressures to 50 PSIG

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