We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 5/8 in Shaft Dia., 1.5 in Working Lg - Mechanical Shaft Seals

FLOWSERVEMechanical Shaft Seals

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 5/8 in Shaft Dia., 1.5 in Working Lg

The FLOWSERVE Mechanical Shaft Seal, type 21, is a single-spring mechanical seal with a carbon ring and Buna gasket. It features an 18-8 spring material, a 1 5/8 in shaft diameter, and a 1.5 in working length (MPN…

SKU 3G-OTH-95499

Brand

FLOWSERVE

Item

Mechanical Seal: Mechanical Shaft Seal, 21, 1 5/8 in Shaft Dia., 1.5 in Working Lg

Category

Mechanical Shaft Seals

Available to Order

Trade pricing by quote — replies within 24h

Qty

WhatsApp an engineer

No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.

Create free account →Log in

Worldwide Shipping

Air & sea freight

Datasheet on Request

Technical specs

1-Day Quote

Replies within 24h

Technical Specifications

FLOWSERVE

Manufacturer Part Number

21-162-04 

Type

21, 18-8 

Shaft Dia.

1 5/8 in 

Working Lg

1.5 in 

Spring Type

Single Spring 

Ring Material

Carbon 

Gasket Material

Buna 

Spring Material

18-8 

Seal Type Designation

21

View Full Spec Sheet

Technical Documents

No technical documents available for this product.

Request documentation →

Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.

Talk to an engineer

Ask a question

FLOWSERVE Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

The FLOWSERVE Mechanical Shaft Seal, type 21, is a single-spring mechanical seal with a carbon ring and Buna gasket. It features an 18-8 spring material, a 1 5/8 in shaft diameter, and a 1.5 in working length (MPN 21-162-04).

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.

Browse all FLOWSERVE products →Contact our engineers →

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 7/8 in Shaft Dia., 1.38 in Working Lg, 18-8 (MPN 21-187-14). Key specifications — Brand: FLOWSERVE; Gasket Material: Buna; Spring Material: 18-8; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 21.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 5/8 in Shaft Dia., 1.38 in Working Lg, 18-8 (MPN 21-162-27). Key specifications — Brand: FLOWSERVE; Gasket Material: Viton; Spring Material: 18-8; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 21.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 3/4 in Shaft Dia., 0.88 in Working Lg, 18-8 (MPN 21-075-04). Key specifications — Brand: FLOWSERVE; Gasket Material: Buna; Spring Material: 18-8; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 21.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 3/8 in Shaft Dia., 1.13 in Working Lg, 18-8 (MPN 21-137-07). Key specifications — Brand: FLOWSERVE; Gasket Material: Viton; Spring Material: 18-8; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 21.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 1/2 in Shaft Dia., 1.13 in Working Lg, 18-8 (MPN 21-150-09). Key specifications — Brand: FLOWSERVE; Gasket Material: Viton; Spring Material: 18-8; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 21.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 3/4 in Shaft Dia., 0.88 in Working Lg, 18-8 (MPN 21-075-17). Key specifications — Brand: FLOWSERVE; Gasket Material: Viton; Spring Material: 18-8; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 21.

More from FLOWSERVE

View all FLOWSERVE parts →

FLOWSERVE Replacement Pump Shaft Seal: 9T, 1 1/4 in Shaft Dia., 250 psi Shut Off Pressure (Max) (MPN 9T-125-227). Key specifications — Brand: FLOWSERVE; Spring Material: 316 Stainless Steel; Spring Type: Multiple Spring; Seal Type Designation: 9T.

FLOWSERVE Narrow Cross-section Replacement Pump Shaft Seal: Mechanical Shaft Seal, 51, Single Spring (MPN 51-075-05). Key specifications — Brand: FLOWSERVE; Gasket Material: Rubber; Spring Material: 316 Stainless Steel; Spring Type: Single Spring; Seal Type Designation: 51.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 52, 1 7/8 in Shaft Dia., 1.5 in Working Lg, 316 (MPN 52-187-05). Key specifications — Brand: FLOWSERVE; Gasket Material: Viton; Spring Material: 316; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 52.

FLOWSERVE Replacement Pump Shaft Seal: Mechanical Shaft Seal, 21, 5/8 in Shaft Dia., Cooking Oil (MPN 21-062-22). Key specifications — Brand: FLOWSERVE; Gasket Material: Rubber; Spring Material: Stainless Steel; Spring Type: Single Spring; Seal Type Designation: 21.

FLOWSERVE Narrow Cross-section Replacement Pump Shaft Seal: Mechanical Shaft Seal, 51, Single Spring (MPN 51-112-05). Key specifications — Brand: FLOWSERVE; Gasket Material: Rubber; Spring Material: 316 Stainless Steel; Spring Type: Single Spring; Seal Type Designation: 51; Replaces Grainger Seal: 5P373.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 52, 2 in Shaft Dia., 1.5 in Working Lg, 316, Buna (MPN 52-200-04). Key specifications — Brand: FLOWSERVE; Gasket Material: Buna; Spring Material: 316; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 52.

FLOWSERVE Replacement Pump Shaft Seal: Mechanical Shaft Seal, 21, 1 1/8 in Shaft Dia., Cooking Oil (MPN 21-112-41). Key specifications — Brand: FLOWSERVE; Gasket Material: Rubber; Spring Material: Stainless Steel; Spring Type: Single Spring; Seal Type Designation: 21.

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 51, 1 1/8 in Shaft Dia., 1.63 in Working Lg, 316 (MPN 51-112-04). Key specifications — Brand: FLOWSERVE; Gasket Material: Buna; Spring Material: 316; Spring Type: Single Spring; Ring Material: Carbon; Seal Type Designation: 51.