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DUFF-NORTONCast Iron Rotating Joints & Unions

DUFF-NORTON Rotary Union: Straight, Plain Cast Iron, 1 Passages

The DUFF-NORTON Rotary Union is a straight, plain cast iron rotating joint with a single passage, designed for industrial fluid transfer. It features a 1-1/4" threaded rotating shaft (MPN 440319C), carbon graphite…

SKU 3G-OTH-479741

Brand
DUFF-NORTON
Item
Rotary Union: Straight, Plain Cast Iron, 1 Passages
Category
Cast Iron Rotating Joints & Unions
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Technical Specifications

DUFF-NORTON
Manufacturer Part Number
440319C
Type
Plain Cast Iron
Passages
1
Maximum Speed
700 rpm
Seal Material
Carbon Graphite
Threaded Rotating Shaft
1-1/4 "
Rotating Shaft Thread Size
1-1/4 "
View Full Spec Sheet

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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 a single passage, designed for industrial fluid transfer. It features a 1-1/4" threaded rotating shaft (MPN 440319C), carbon graphite seal material, and a maximum speed of 700 rpm. 3G Electric interprets customer demand and delivers this genuine industrial component across 14 departments, with specialist depth in combustion, pumps, and controls as an authorised distributor.

Frequently Asked Questions

What is a DUFF-NORTON rotary union used for?

A DUFF-NORTON rotary union transfers fluid (coolant, steam, thermal oil) from a stationary supply line into rotating machinery such as rolls, drums, or spindles. This straight, plain cast iron model with a 1-1/4" threaded shaft is common in paper, steel, and textile mills.

What are the specifications of the DUFF-NORTON 440319C rotary union?

The DUFF-NORTON 440319C is a single-passage, plain cast iron rotary union with a 1-1/4" threaded rotating shaft, carbon graphite seal, and maximum speed of 700 rpm. It is designed for industrial fluid transfer in demanding rotating equipment applications.

Where to buy a DUFF-NORTON rotary union worldwide?

3G Electric supplies the DUFF-NORTON 440319C rotary union worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this genuine component.

How to install a DUFF-NORTON rotary union?

Ensure the rotating shaft threads (1-1/4") are clean and match the machine's female port. Support the union to avoid side loads. Use a thread sealant compatible with the fluid. Do not exceed 700 rpm. Refer to the manufacturer's manual for torque and alignment specs.

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.

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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.
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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".
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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 ".
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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 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.
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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 ".
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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 Rotary Union: Straight, Plain Cast Iron, 1 Passages, 1/4" Threaded Rotating Shaft, Plain (MPN 730431C). Key specifications — Maximum Speed: 700 rpm; Brand: DUFF-NORTON; Seal Material: Carbon Graphite; Rotating Shaft Thread Size: 1/4".
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