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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 31, 1 3/4 in Shaft Dia., 1.38 in Working Lg - Mechanical Shaft Seals
FLOWSERVEMechanical Shaft Seals

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 31, 1 3/4 in Shaft Dia., 1.38 in Working Lg

The FLOWSERVE Mechanical Shaft Seal, type 31 (MPN 31-175-28), is a single-spring mechanical seal with silicon carbide rings, a Viton gasket, and 18-8 spring material. It is designed for a 1 3/4 in shaft diameter with…

SKU 3G-OTH-95686

Also listed as: 3117528 · 31 175 28

Brand
FLOWSERVE
Item
Mechanical Seal: Mechanical Shaft Seal, 31, 1 3/4 in Shaft Dia., 1.38 in Working Lg
Category
Mechanical Shaft Seals
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

FLOWSERVE
Manufacturer Part Number
31-175-28
Type
31, 18-8
Shaft Dia.
1 3/4 in
Working Lg
1.38 in
Spring Type
Single Spring
Ring Material
Silicon Carbide
Gasket Material
Viton
Spring Material
18-8
Seal Type Designation
31

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FLOWSERVE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The FLOWSERVE Mechanical Shaft Seal, type 31 (MPN 31-175-28), is a single-spring mechanical seal with silicon carbide rings, a Viton gasket, and 18-8 spring material. It is designed for a 1 3/4 in shaft diameter with a 1.38 in working length.

Frequently Asked Questions

What is the FLOWSERVE 31-175-28 mechanical seal used for?

The FLOWSERVE 31-175-28 mechanical shaft seal is used in industrial pumps and rotating equipment to prevent fluid leakage along a rotating shaft. It is suitable for applications requiring a single-spring design with silicon carbide faces and a Viton gasket, common in chemical processing, water treatment, and general manufacturing.

What are the specifications of the FLOWSERVE 31-175-28 mechanical seal?

The FLOWSERVE 31-175-28 is a type 31 mechanical shaft seal with a 1 3/4 in shaft diameter and 1.38 in working length. It features a single spring made of 18-8 stainless steel, silicon carbide seal rings, and a Viton gasket. The manufacturer part number is 31-175-28.

Where to buy the FLOWSERVE 31-175-28 mechanical seal worldwide?

You can source the FLOWSERVE 31-175-28 mechanical seal through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this FLOWSERVE seal.

How to install the FLOWSERVE 31-175-28 mechanical seal?

To install the FLOWSERVE 31-175-28, ensure the shaft and housing bore are clean and free of burrs. Lubricate the Viton gasket and seal faces with a compatible lubricant. Slide the seal onto the shaft, taking care not to damage the silicon carbide faces. Follow the manufacturer's instructions for setting the working length to 1.38 in.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 31, 1 in Shaft Dia., 1 in Working Lg, 18-8, Viton (MPN 31-100-10)
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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 31, 1 in Shaft Dia., 1 in Working Lg, 18-8, Viton (MPN 31-100-10)
FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 31, 1/8 in Shaft Dia., 0.88 in Working Lg, 18-8 (MPN 31-062-24)
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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 31, 1/8 in Shaft Dia., 0.88 in Working Lg, 18-8 (MPN 31-062-24)
FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 3/4 in Shaft Dia., 1.38 in Working Lg, 18-8 (MPN 21-175-07)
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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 3/4 in Shaft Dia., 1.38 in Working Lg, 18-8 (MPN 21-175-07)
FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 3/4 in Shaft Dia., 0.88 in Working Lg, 18-8 (MPN 21-075-17)
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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 3/4 in Shaft Dia., 0.88 in Working Lg, 18-8 (MPN 21-075-17)
FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 3/8 in Shaft Dia., 1.13 in Working Lg, 18-8 (MPN 21-137-07)
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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 3/8 in Shaft Dia., 1.13 in Working Lg, 18-8 (MPN 21-137-07)
FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 1/8 in Shaft Dia., 1.06 in Working Lg, 18-8 (MPN 21-112-17)
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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 21, 1 1/8 in Shaft Dia., 1.06 in Working Lg, 18-8 (MPN 21-112-17)

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