The BSFG (Bellows Single Full Graphite) cartridge seal design to eliminate the costly and often long lead-time issues of exotic elastomer compounds.Also This seal features graphite rings at every primary sealing surface, eliminating the need for elastomers.

The hydraulically balanced bellows unit is available in a variety of different material options with either elastomer or graphite packing sealing rings.

Features:

• Full graphite seal for high temperature or corrosive chemical applications
• Fits pumps with thin radial seal chamber cross-sections
• Quench, flush and drain ports for cooling or heating options to maximize seal life
• Also cartridge design for ease of installation
• Sizes available from 1.000″ to 4.000″ (24mm – 100mm) in standard and also ANSI Plus gland formats

BSFG — Design Features

This single cartridge mechanical seal has graphite rings at every secondary sealing surface, eliminating the need for elastomers. The design will fit inside radial cross sectional spaces as small as 0.312” (8mm), making the BSFG™ a truly advantageous sealing solution.

Inboard Bellows

The bellows unit is ideal for replacing the semi–dynamic sliding elastomer of a conventional pusher seal. This allows the bellows design to more readily and apply to thermal applications. The BSFG is available in any AESSEAL® standard metal bellows material and seal face combination including SHS, HHH and SAC with Carbon, Antimony Carbon, TC or SiC seal faces.

Fits in Thin Radial Cross Sectional Spaces

Unlike conventional full graphite cartridge seals, the BSFG™ can be installed on equipment with radial cross sectional spaces as small as 0.312” (8mm). This is typical on some smaller process pumps. This thin cross sectional design makes the BSFG™ ideally suited to the solid shaft version of the Dean Brothers R434 pump.Also This pump, along with others in its product class, is particularly popular in heat transfer oil applications in the USA. Such pumps conventionally seal with metal bellows component seals, with graphite. These component seals can be prone to installation problems resulting in premature seal failure.

True Cartridge Design

The BSFG™ is supplied as a true cartridge seal. This means that the seal factory assemble and tested prior to dispatch. This ensures that the seal faces are flat and statically sealed — an issue particularly important when using graphite technology.

Exotic Alloy Wetted Options

The BSFG available with wet components offered in Alloy 276.Also This is particularly advantageous when sealing thermal applications, which incorporate chemical elements.

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