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"600 Series" Rotary Union

Model:  600 Series / SRU-4087

Model Type
Thread
Part N° Description Nominal Pipe Size Shaft Thread (A) Guide Price Quantity
4087-T22453
770363C
R613JKANPT 1/4 1/4 NPT Quote Required
4087-T22454
770365C
R613MKAUNF 1/4 5/8-18 UNF Quote Required
4087-T22455
770367C
R617JKANPT 3/8 3/8 NPT Quote Required
4087-T22456
770369C
R617MKAUNF 3/8 5/8-18 UNF Quote Required
4087-T22457
770371C
R621JKANPT 1/2 1/2 NPT Quote Required
4087-T22458
770373C
R621MKAUNF 1/2 3/4-16 UNF Quote Required
4087-T22459
770375C
R627JKANPT 3/4 3/4 NPT Quote Required
4087-T22460
770377C
R627MKAUNF 3/4 3/4-16 UNF Quote Required
4087-T22461
770379C
R634JKANPT 1 1 NPT Quote Required
4087-T22462
770381C
R634MKAUNF 1 1-1/2-12 UNF Quote Required
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Rotary union with axial nickel plated housing or radial inlet with aluminium housing.

600 Series Rotary Union

600 Series Rotary Union

Features and Benefits

  • Either axial (straight through) nickel plated housing or radial (90°) inlet with aluminium housing for maximum flexibility.
  • Suitable for speed upto 1,500 RPM.
  • Available in sizes from 1/4" to 1" NPT & MT.
  • Equipped with a GR seal design that allows bi-directional rotation.
600 Series Dimensional Drawing

600 Series Axial Inlet Dimensions (inches)

Nominal Pipe Size Shaft Thread (A) B Inlet Thread C (NPT) DN Seal Design (E) Overall Length (F) Flats (H) Outside Diameter (I)
1/4 1/4 NPT .47 1/4 .19 466787C 2.79 .74 1.49
5/8-18 UNF
3/8 3/8 NPT .43 3/8 .31 466789C 3.14 1.06 1.77
5/8-18 UNF
1/2 1/2 NPT .55 1/2 .51 466792C 4.05 1.25 2.36
3/4-16 UNF
3/4 3/4 NPT .70 3/4 .70 466794C 5.35 1.37 2.95
3/4-16 UNF
1 1 NPT .74 1 .86 466792C 6.41 1.73 3.70
1-1/2-12 UNF

600 Series Radial Inlet Dimensions (inches)

Nominal Pipe Size Shaft Thread (A) B Inlet Thread C (NPT) DN Seal Design  (E) Overall Length (F) Radial Design (G) Flats (H) Outside Diameter (i)
1/4 1/4 NPT .47 1/4 .19 466787C 2.79 2.26 .74 1.49
5/8-18 UNF
3/8 3/8 NPT .43 3/8 .31 466789C 3.14 2.93 1.06 1.77
5/8-18 UNF
1/2 1/2 NPT .55 1/2 .51 466792C 4.05 3.48 1.25 2.36
3/4-16 UNF
3/4 3/4 NPT .70 3/4 .70 466794C 5.35 4.56 1.37 2.95
3/4-16 UNF
1 1 NPT .74 1 .86 466792C 6.41 5.35 1.73 3.70
1 1/2-12 UNF

600 Series Rotary Union Specifications

Nominal Pipe Size Shaft Thread (A) Axial Inlet Radial Inlet
Right Hand Left Hand Right Hand Left Hand
Part Number Description Part Number Description Part Number Description Part Number Description
1/4 1/4 NPT 770363C R613JKANPT 770362C L613JKANPT 770383C R713JKRNPT 770382C L713JKRNPT
5/8-18 UNF 770365C R613MKAUNF 770364C L613MKAUNF 770385C R713MKRUNF 770384C L713MKRUNF
3/8 3/8 NPT 770367C R617JKANPT 770366C L617JKANPT 770387C R717JKRNPT 770386C L717JKRNPT
5/8-18 UNF 770369C R617MKAUNF 770368C L617MKAUNF 770389C R717MKRUNF 770388C L717MKRUNF
1/2 1/2 NPT 770371C R621JKANPT 770370C L621JKANPT 770391C R721JKRNPT 770390C L721JKRNPT
3/4-16 UNF 770373C R621MKAUNF 770372C L621MKAUNF 770393C R721MKRUNF 770392C L721MKRUNF
3/4 3/4 NPT 770375C R627JKANPT 770374C L627JKANPT 770395C R727JKRNPT 770394C L727JKRNPT
3/4-16 UNF 770377C R627MKAUNF 770376C L627MKAUNF 770397C R727MKRUNF 770396C L727MKRUNF
1 1 NPT 770379C R634JKANPT 770378C L634JKANPT 770399C R734JKRNPT 770398C L734JKRNPT
1-1/2-12 UNF 770381C R634MKAUNF 770380C L634MKAUNF 770401C R734MKRUNF 770400C L734MKRUNF
600 Series Performance Chart
Rotary Union Design

Rotary Union Design

While rotating joints come in many shapes, sizes, and configurations, they always have the same four basic components: housing, a shaft, a bearing (or bearings) and a seal.

Mechanical Seal

The heart of the Rotary Union or rotary joint is the seal.

The seal prevents the medium (water, oil, air, etc) from leaking outside the Rotary Union while the Rotary Union is in operation.

Duff-Norton uses four basic types of mechanical seals in its Rotary Unions: 1) pusher-type end face mechanical seal, 2) non-pusher type end face mechanical seal, 3) lip seals and 4) o-ring seal. Rotary Unions may have more than one seal.

Bearing

The second most important part of the Rotary Union is the bearing. A Rotary Union may have only one bearing or multiple bearings.

Roller bearings, such as ball bearings and tapered roller bearings, or non-roller bearings, like graphite bearings and bronze bushings, may be used in the Rotary Union.

The bearings are always used to allow a part of the joint, either the shaft or the housing, to rotate.

Shaft

The shaft is the component that carries the medium through the Rotary Union into the drum or roll. In many cases, the shaft will turn with the drum or roll. In some cases, like in larger flanged rotary Unions, the shaft may be stationary while the housing rotates. The bearings and seal are typically assembled around the shaft.

Housing

The housing is the component that holds all of the other elements of the Rotary Union together. The housing has an inlet port, which is a threaded port to which the hose supplying the medium will be attached .

The Rotary Union may also have an outlet port, if the same joint is being used both to supply fluid to a roll and to remove fluid from the roll. In smaller Rotary Unions, the housing is stationary. In larger Rotary Unions, the housing maybe bolted to the drum or roll using a flange. In these cases, the housing rotates at the same speed as the drum.


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