Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 1/4" Threaded Rotating Shaft - Cast Iron Rotating Joints & Unions
DUFF-NORTONCast Iron Rotating Joints & Unions

DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 1/4" Threaded Rotating Shaft

The DUFF-NORTON Rotary Union is a straight, plain cast iron rotating joint with 1 passage, designed for a 1/4" threaded rotating shaft. It features a carbon graphite seal and supports a maximum speed of 700 rpm (MPN…

SKU 3G-OTH-479750

Brand
DUFF-NORTON
Item
Rotary Union: Straight, Plain Cast Iron, 1 Passages, 1/4" Threaded Rotating Shaft
Category
Cast Iron Rotating Joints & Unions
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.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

DUFF-NORTON
Manufacturer Part Number
730431C
Type
Plain Cast Iron, Plain
Passages
1
Maximum Speed
700 rpm
Seal Material
Carbon Graphite
Threaded Rotating Shaft
1/4"
Rotating Shaft Thread Size
1/4"
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

DUFF-NORTON Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DUFF-NORTON Rotary Union is a straight, plain cast iron rotating joint with 1 passage, designed for a 1/4" threaded rotating shaft. It features a carbon graphite seal and supports a maximum speed of 700 rpm (MPN 730431C).

Frequently Asked Questions

What is a DUFF-NORTON rotary union used for?

A DUFF-NORTON rotary union transfers fluid or air from a stationary supply line into rotating machinery. This straight, plain cast iron model with a 1/4" threaded rotating shaft and carbon graphite seal is common in paper, steel, and textile mills for cooling or heating rolls.

What are the specifications of the DUFF-NORTON 730431C rotary union?

The DUFF-NORTON 730431C is a straight, plain cast iron rotary union with 1 passage. It has a 1/4" threaded rotating shaft, a carbon graphite seal, and a maximum speed of 700 rpm. The manufacturer part number is 730431C.

Where to buy a DUFF-NORTON rotary union worldwide?

3G Electric supplies the DUFF-NORTON rotary union 730431C worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this straight, plain cast iron rotating joint with a 1/4" threaded shaft to your facility.

How to install a DUFF-NORTON rotary union?

Ensure the rotating shaft is clean and aligns with the union's 1/4" threaded connection. Apply thread sealant to the shaft, hand-tighten the union, then torque to manufacturer specs. Verify the carbon graphite seal is seated properly and the union rotates freely before pressurizing.

Used in

Common applications for DUFF-NORTON
Solar panel tracking — Duff-Norton LT series linear actuators adjust panel tilt angles with IP66 protection.
Material handling automation — LS series actuators position conveyor gates or diverters with 675 lbf capacity.
Agricultural equipment — LT actuators control vent openings or seed drill depth in dusty, outdoor conditions.
Industrial valve actuation — LT series with potentiometer feedback provides precise valve position control.
Medical equipment adjustment — LT actuators with low noise plastic nuts are used in patient bed or table positioning.
Packaging machinery — LS series actuators drive pusher arms or lift platforms in high-cycle indoor environments.

DUFF-NORTON Products

3G Electric supplies DUFF-NORTON cast iron rotating joints & unions. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

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

More from DUFF-NORTON

View all DUFF-NORTON parts →
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 2 Passages, 2" Threaded Rotating Shaft, Plain (MPN 440467C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite.
DUFF-NORTON
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 2 Passages, 2" Threaded Rotating Shaft, Plain (MPN 440467C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite.
DUFF-NORTON Rotary Union: Elbow, Plain Cast Iron, 2 Passages, Threaded Rotating Shaft, Gases/Oils (MPN 730859C). Key specifications — Maximum Speed: 600 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite.
DUFF-NORTON
DUFF-NORTON Rotary Union: Elbow, Plain Cast Iron, 2 Passages, Threaded Rotating Shaft, Gases/Oils (MPN 730859C). Key specifications — Maximum Speed: 600 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite.
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 3/8" Threaded Rotating Shaft, Plain (MPN 730444C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 3/8".
DUFF-NORTON
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 3/8" Threaded Rotating Shaft, Plain (MPN 730444C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 3/8".
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 1/4" Threaded Rotating Shaft, Plain (MPN 730432C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1/4".
DUFF-NORTON
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 1/4" Threaded Rotating Shaft, Plain (MPN 730432C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1/4".
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 2 Passages, 1-1/4 " Threaded Rotating Shaft (MPN 440322C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1-1/4 ".
DUFF-NORTON
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 2 Passages, 1-1/4 " Threaded Rotating Shaft (MPN 440322C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1-1/4 ".
DUFF-NORTON
DUFF-NORTON
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 1-1/4 " Threaded Rotating Shaft (MPN 440319C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1-1/4 ".
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 2" Threaded Rotating Shaft, Plain (MPN 440465C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite.
DUFF-NORTON
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages, 2" Threaded Rotating Shaft, Plain (MPN 440465C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite.
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 2 Passages, 1-1/4 " Threaded Rotating Shaft (MPN 440321C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1-1/4 ".
DUFF-NORTON
DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 2 Passages, 1-1/4 " Threaded Rotating Shaft (MPN 440321C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1-1/4 ".