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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 51, 1 3/4 in Shaft Dia., 2 in Working Lg - Mechanical Shaft Seals
FLOWSERVEMechanical Shaft Seals

FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 51, 1 3/4 in Shaft Dia., 2 in Working Lg

The FLOWSERVE Mechanical Shaft Seal, type designation 51, is a single-spring mechanical seal with a carbon ring and Buna gasket. It features a 316 stainless steel spring and is designed for a 1 3/4-inch shaft…

SKU 3G-OTH-95783

Also listed as: 5117504 · 51 175 04

Brand
FLOWSERVE
Item
Mechanical Seal: Mechanical Shaft Seal, 51, 1 3/4 in Shaft Dia., 2 in Working Lg
Category
Mechanical Shaft Seals
Available to Order
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Worldwide Shipping
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

FLOWSERVE
Manufacturer Part Number
51-175-04
Type
51, 316
Shaft Dia.
1 3/4 in
Working Lg
2 in
Spring Type
Single Spring
Ring Material
Carbon
Gasket Material
Buna
Spring Material
316
Seal Type Designation
51

Technical Documents

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

Product Description

The FLOWSERVE Mechanical Shaft Seal, type designation 51, is a single-spring mechanical seal with a carbon ring and Buna gasket. It features a 316 stainless steel spring and is designed for a 1 3/4-inch shaft diameter with a 2-inch working length (MPN 51-175-04).

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the FLOWSERVE 51 mechanical seal used for?

The FLOWSERVE 51 mechanical shaft seal is used in industrial pumps and rotating equipment to prevent fluid leakage along a rotating shaft. It is suitable for water, light chemicals, and general process applications where a carbon ring and Buna gasket provide reliable sealing.

What are the specifications of the FLOWSERVE 51-175-04 mechanical seal?

The FLOWSERVE 51-175-04 mechanical seal has a 1 3/4-inch shaft diameter, 2-inch working length, single 316 stainless steel spring, carbon ring, and Buna gasket. It is type designation 51 with manufacturer part number 51-175-04.

Where to buy FLOWSERVE mechanical seals worldwide?

You can source the FLOWSERVE 51 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 part.

How to install a FLOWSERVE single-spring mechanical seal?

To install a FLOWSERVE single-spring mechanical seal, ensure the shaft and housing bore are clean and free of burrs. Lubricate the seal faces and gasket with a compatible fluid. Slide the seal onto the shaft, compress the spring evenly, and secure the set screws. Follow pump manufacturer guidelines for precise alignment.

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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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 51, 1 1/2 in Shaft Dia., 1.69 in Working Lg, 316 (MPN 51-150-04)
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FLOWSERVE Mechanical Seal: Mechanical Shaft Seal, 51, 1 1/4 in Shaft Dia., 1.63 in Working Lg, 316 (MPN 51-125-04)
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