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Chesterton ACP491 Mechanical Seal 891 440/440m Rbs Sas Stationary Seal Rings

Chesterton ACP491 Mechanical Seal 891 440/440m Rbs Sas Stationary Seal Rings

Product No.：491/891/440/440M/RBS/SAS
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Chesterton ACP491 Mechanical Seal 891 440/440M RBS SAS Stationary Seal Rings

491 Rotary Internal Single Seal

DIN Rotary Pusher Single Seal

The 491 is designed in accordance with EN 12756 to fit the short length installation requirements.

The 491 is designed not to damage or fret the equipment shaft/sleeve because the dynamic O-Ring is positioned on a replaceable component surface. This balanced, high-pressure monolithic seal design will provide a performance upgrade to standard, original equipment component seals. The seal can be easily rebuilt in the field using low-cost rebuild kits.

Product Features

Monolithic seal faces

Balanced

Non-clog isolated springs

Dynamic O-Ring is positioned on a replaceable component surface

Fits EN 12756 L1K dimension

Technical Data

Size Range	16 mm to 110 mm
Applicable Standards and Approvals	ISO-3069-S, ATEX
Variants	491 DINS 491 DINL

Materials

Faces	CB, TC, SSC
Elastomers	FKM, EPDM, FEPM, FFKM
Metals	EN 1.4401 (316SS)
Springs	EN 2.4819 (Alloy C-276)

Operating Conditions

Temperature	-55 to 300 °C (-67 to 570 °F)
Speed	20 m/s ( 4000 fpm )
Pressure	10 bar g (150 psig)
Notes	Seal pressure capabilities are dependent on the fluid sealed, temperature, speed, and seal face combinations. For operation outside the limits and additional materials consult Chesterton Mechanical Seal Engineering.

891 Rotary Inside Single Seal

Rotary Pusher Single Seal

Designed for the replacement of low technology component seals, the 891 seal design provides an upgrade to standard original equipment component seal installations.

The 891 is designed not to damage or fret the equipment shaft/sleeve because the dynamic O-Ring is positioned on a replaceable component surface. This balanced, high-pressure monolithic seal design will provide a reliable upgrade to standard, unbalanced designs. The seal can be easily rebuilt in the field using low-cost rebuild kits.

440/440M External Single Component Seal

Designed for Corrosive Service and Metallic-Free Applications

The 440 external design is used in general chemical applications where there are corrosives and other aggressive chemicals that attack standard seal materials and where special, high-cost alloys are required. All wetted parts are sacrificial and easily replaced in a repair program. No metal parts contact the process fluid. The 440 is a low-cost replacement for seals made from expensive alloy materials.

RBS Single Component Seal

For Sealing Where Axial Space is at a Premium

With proven Chesterton quality, the RBS seal is the ideal choice for sealing small pumps where axial space is limited. Designed with a robust friction drive and large spring format, the RBS provides reliable sealing for a large range of fluids. The RBS seal fits in seal chambers according to EN12756 (L1k) standards as well as chambers with even shorter axial space. It comes with a choice of different mating stationary faces, allowing the RBS to fit in a wide pump population.

Self-Aligning Stationary Seal (SAS)

Easy Installation; Compensates for Equipment Misalignment

This seal is specifically engineered to operate against Chesterton rotating seal units. The SAS compensates for equipment misalignment, resulting in optimized seal face tracking. The application of the Self-Aligning Stationary in conjunction with Chesterton rotating units results in a highly reliable sealing option for replacing lower technology OEM seals.

Stationary Seal Rings

Versatile stationary seal rings primarily used with component seal designs

Various stationary seal ring designs can be assembled with Chesterton rotary units to make one complete, reliable replacement seal of the component design. These seal rings are designed to accommodate popular ANSI and DIN specifications.

Chesterton stationary replacement seal rings come in an array of designs and sizes. Chesterton seal rings are not plated nor are they combined with other inferior materials. They are all manufactured with high quality monolithic materials, which result in greater reliability.