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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1/2 in Shaft Dia., 0.81 in Working Lg - Mechanical Shaft Seals

FLOWSERVEMechanical Shaft Seals

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1/2 in Shaft Dia., 0.81 in Working Lg

The FLOWSERVE Mechanical Shaft Seal, designated Type 21, is a single-spring mechanical seal with a carbon ring and a Viton gasket. It features an 18-8 spring material and is designed for a 1/2-inch shaft diameter…

SKU 3G-OTH-94979

Brand

FLOWSERVE

Item

Mechanical Seal: Mechanical Shaft Seal, 21, 1/2 in Shaft Dia., 0.81 in Working Lg

Category

Mechanical Shaft Seals

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Technical Specifications

FLOWSERVE

Manufacturer Part Number

21-050-05 

Type

21, 18-8 

Shaft Dia.

1/2 in 

Working Lg

0.81 in 

Spring Type

Single Spring 

Ring Material

Carbon 

Gasket Material

Viton 

Spring Material

18-8 

Seal Type Designation

21

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FLOWSERVE Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

The FLOWSERVE Mechanical Shaft Seal, designated Type 21, is a single-spring mechanical seal with a carbon ring and a Viton gasket. It features an 18-8 spring material and is designed for a 1/2-inch shaft diameter with a 0.81-inch working length (MPN 21-050-05).

Used in

Common applications for FLOWSERVE

Water and wastewater pumping — FLOWSERVE Type 21 mechanical seal (e.g., MPN 21-100-10) for centrifugal pumps in municipal water treatment

Hydrocarbon processing — FLOWSERVE Type 68 mechanical seal (e.g., MPN 68-062-214) for diesel and light oil transfer pumps

Food processing — FLOWSERVE Type 21 seal (MPN 21-137-04) for cooking oil circulation pumps in edible oil refineries

Chemical transfer — FLOWSERVE Type 51 narrow cross-section seal (MPN 51-087-05) for compact chemical dosing pumps

HVAC and cooling systems — FLOWSERVE Type 16 unitized rotary seal (MPN 16-062-11) for chilled water pump shaft sealing

General industrial mixing — FLOWSERVE Type 52 narrow cross-section seal (MPN 52-125-05) for agitator shafts in batch processing tanks

FLOWSERVE Products

3G Electric supplies FLOWSERVE mechanical shaft seals. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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