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"HPMC/HSMC Series" Rotary Union

"HPMC/HSMC Series" Rotary Union

Multi port rotary union designed for high speed or high pressure applications.

Model: 

HPMC/HSMC Series / SRU-4093

"HPMC/HSMC Series" Rotary Union

HPMC And HSMC Series Rotary Union HPMC Series Muti Port Rotary Union Diagram HSMC Series Multi Port Rotary Union Diagram HPMC Series Performance Charts HSMC Series Performance Charts Rotary Union Design
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Duff Norton

HPMC/HSMC Series Rotary Union

Features and Benefits

  • High Pressure or High Speed Applications - Duff-Norton multi-port Rotary Unions are available in both high pressure (HPMC Series) and high speed (HSMC Series) configurations.
  • Pressures Up to 5,880 psi - HPMC Series Rotary Unions are designed for higher pressure, available with up to eight ports as standard and are suitable for use in low speed applications for pressures up to 5,880 psi.
  • Available up to 4 Ports - HSMC Series Rotary Unions are available with up to four ports as standard.
  • Speeds up to 3,000 RPM - HSMC Series is perfect for low pressure applications, up to 175 psi with rotational speeds up to 3,000 RPM.
  • No Cross Contamination - Feel free to run dissimilar fluids through Duff-Norton Multi-Port Rotary Unions as each port is always individually sealed eliminating cross contamination between circuits.

HPMC Series Muti-Port Rotary Union Dimensional Diagram

 

HPMC Series Muti Port Rotary Union Diagram
No. of Ports Part No. Desc. A B C D E & Vg6 F G (npt) H Ref. O-ring I J K L M N O P Q R S T U
2 750748C RMC206R2KNPT 5.89 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 2.26 3.15 1.18 0.39 0.71 3/8
3 750749C RMC306R2KNPT 6.93 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 3.31 3.15 1.18 0.39 0.71 3/8
4 750750C RMC406R2KNPT 7.97 1.04 3.15 0.24 35 0.87 1/8

0.35

 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 4.35 3.15 1.18 0.39 0.71 3/8
5 750751C RMC506R2KNPT 9.02 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 5.39 3.15 1.18 0.39 0.71 3/8
6 750752C RMC606R2KNPT 10.06 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 6.44 3.15 1.18 0.39 0.71 3/8
7 750753C RMC706R2KNPT 12.32 1.14 3.94 0.24 40 1.06 1/8 0.35 06X01.5 2.83 0.43 3.50 0.79 0.47 M8 1.26 8.43 3.54 1.38 0.47 0.71 1/2
8 750754C RMC806R2KNPT 13.46 1.14 3.94 0.24 40 1.06 1/8 0.35 06X01.5 2.83 0.43 3.50 0.79 0.47 M8 1.26 9.57 3.54 1.38 0.47 0.71 1/2
2 750755C RMC208R2KNPT 6.77 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 2.87 3.54 1.38 0.31 0.87 1/4
3 750756C RMC308R2KNPT 7.99 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 4.09 3.54 1.38 0.31 0.87 1/4
4 750757C RMC408R2KNPT 9.21 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 5.31 3.54 1.38 0.31 0.87 1/4
5 750758C RMC508R2KNPT 10.43 1.22 3.94 0.31 40 1.02 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 6.54 3.54 1.38 0.39 0.87 3/8
6 750759C RMC608R2KNPT 12.48 1.30 4.53 0.31 55 1.48 1/4 0.47 R6A 3.39 0.43 3.80 0.79 0.55 M10 1.46 8.11 4.53 1.97 0.47 0.87 1/2
7 750760C RMC708R2KNPT 13.78 1.30 4.53 0.31 55 1.48 1/4 0.47 R6A 3.39 0.43 3.80 0.79 0.55 M10 1.46 9.41 4.53 1.97 0.47 0.87 1/2
8 750761C RMC808R2KNPT 15.08 1.30 4.53 0.31 55 1.48 1/4 0.47 R6A 3.39 0.43 3.80 0.79 0.55 M10 1.46 10.71 4.53 1.97 0.47 0.87 1/2
2 750762C RMC210R2KNPT 6.93 1.30 3.94 0.39 40 0.94 3/8 0.49 0.10X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 3.03 3.54 1.38 0.31 0.98 1/4
3 750763C RMC310R2KNPT 8.23 1.30 3.94 0.39 40 0.94 3/8 0.49 0.10X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 4.33 3.54 1.38 0.31 0.98 1/4
4 750764C RMC410R2KNPT 9.53 1.30 3.94 0.39 40 0.94 3/8 0.49 0.10X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 5.63 3.54 1.38 0.31 0.98 1/4
5 750765C RMC510R2KNPT 11.57 1.38 4.53 0.39 55 1.34 3/8 0.49 0.10X01.3 3.39 0.43 3.84 0.79 0.55 M10 1.46 7.20 4.53 1.97 0.47 0.98 1/2
6 750766C RMC610R2KNPT 12.95 1.38 4.53 0.39 55 1.34 3/8 0.49 0.10X01.3 3.39 0.43 3.84 0.79 0.55 M10 1.46 8.58 4.53 1.97 0.47 0.98 1/2
7 750767C RMC710R2KNPT 14.33 1.38 4.53 0.39 55 1.34 3/8 0.49 0.10X01.3 3.39 0.43 3.84 0.79 0.55 M10 1.46 9.96 4.53 1.97 0.47 0.98 1/2
8 750768C RMC810R2KNPT 16.26 1.38 5.51 0.39 70

1.85

 3/8 0.49 0.10X01.3 4.25 0.51 4.27 0.98 0.59 M12 1.57 11.42 5.31 2.56 0.71 0.98 3/4
2 750769C RMC212R2KNPT 7.60 1.46 4.53 0.47 55 1.26 1/2 0.69 R10 3.39 0.43 3.88 0.79 0.55 M12 1.46 3.23 4.53 1.97 0.39 1.26 3/8
3 750770C RMC312R2KNPT 9.06 1.46 4.53 0.47 55 1.26 1/2 0.69 R10 3.39 0.43 3.88 0.79 0.55 M12 1.46 4.69

4.53

 1.97 0.39 1.26 3/8
4 750771C RMC412R2KNPT 10.51 1.46 4.53 0.47 55 1.26 1/2 0.69 R10 3.39 0.43 3.88 0.79 0.55 M12 1.46 6.14 4.53 1.97 0.39 1.26 3/8
5 750772C RMC512R2KNPT 12.52 1.46 5.51 0.47 70 1.65 1/2 0.69 R10 4.25 0.51 4.31 0.98 0.59 M12 1.57 7.72 5.31 2.56 0.47 1.26 1/2
6 750773C RMC612R2KNPT 15.20 1.54 6.69 0.47 90 2.13 1/2 0.69 R10 5.20 0.67 4.80 1.18 0.63 M12 1.77 9.72 6.30 3.35 0.71 1.26 3/4
7 750774C RMC712R2KNPT 16.73 1.54 6.69 0.47 90 2.13 1/2 0.69 R10 5.20 0.67 4.80 1.18 0.63 M12 1.77 11.26 6.30 3.35 0.71 1.26 3/4
8 750775C RMC812R2KNPT 18.27 1.54 6.69 0.47 90 2.13 1/2 0.69 R10 5.20 0.67 4.80 1.18 0.63 M12 1.77 12.80 6.30 3.35 0.71 1.26 3/4
2 750776C RMC218R2KNPT 8.66 1.69 5.51 0.71 70 1.50 3/4 0.94 R14 4.25 0.51 4.43 0.98 0.59 M12 1.57 3.86 5.31 2.56 0.39 1.46 3/8
3 750777C RMC318R2KNPT 10.35 1.69 5.51 0.71 70 1.50 3/4 0.94 R14 4.25 0.51 4.43 0.98 0.59 M12 1.57 5.55 5.31 2.56 0.39 1.46 3/8
4 750778C RMC418R2KNPT 12.05 1.69 5.51 0.71 70 1.50 3/4 0.94 R14 4.25 0.51 4.43 0.98 0.59 M12 1.57 7.24 5.31 2.56 0.39 1.46 3/8
5 750779C RMC518R2KNPT 14.84 1.77 6.69 0.71 90 2.20 3/4 0.94 R14 5.20 0.67 4.92 1.18 0.63 M12 1.77 9.37 6.30 3.35 0.71 1.46 3/4
2 750780C RMC225R2KNPT 10.08 2.05

6.69

 0.98 90 1.97 1 1.26 R19 5.20 0.67 5.06 1.18 0.63 M14 1.77 4.61 6.30 3.35 0.47 1.69 1/2
3 750781C RMC325R2KNPT 12.13

2.05

 6.69 0.98 90 1.97 1 1.26 R19 5.20 0.67 5.06 1.18 0.63 M14 1.77 6.65 6.30 3.35 0.47 1.69 1/2
4 750782C RMC425R2KNPT 14.17 2.05 6.69 0.98 90 1.97 1 1.26 R19 5.20 0.67 5.06 1.18 0.63 M14 1.77 8.70 6.30 3.35 0.47 1.69 1/2
5 750783C RMC525R2KNPT 17.32 2.17 7.48 0.98 105 2.72 1 1.26 R19 5.91 0.67 5.41 1.18 0.63 M14 2.05 11.38 7.48 3.94 0.71 1.69 3/4
2 750784C RMC231R2KNPT 11.30 2.40 7.48 1.22 105 2.24 1-1/4 1.44 R22 5.91 0.67 5.53 1.18 0.63 M14 2.05 5.35 7.48 3.94 0.47 2.17 1/2
3 750785C RMC331R2KNPT 13.70 2.40 7.48 1.22 105 2.24 1-1/4 1.44 R22 5.91 0.67 5.53 1.18 0.63 M14 2.05 7.76 7.48 3.94 0.47 2.17 1/2
4 750786C RMC431R2KNPT 16.10 2.40 7.48 1.22 105 2.24 1-1/4 1.44 R22 5.91 0.67 5.53 1.18 0.63 M14 2.05 10.16 7.48 3.94 0.47 2.17 1/2
5 750787C RMC531R2KNPT 20.87 2.64 9.06 1.22 140 3.43 1-1/4 1.44 R22 7.24 0.67 6.28 1.18 0.79 M16 2.44 13.90 9.06 5.12 0.71 2.17 3/4

HSMC Series Multi-Port Rotary Union Dimensional Diagram

HSMC Series Multi Port Rotary Union Diagram
No. of Ports Part No. Desc. A B C D V F G (NPT) H Ref. O-ring I J K L M N O P Q R T
2 750889C RMC206RVRKNPT 5.89 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 2.26 3.15 1.18 0.71
3 750809C RMC306RVRKNPT 6.93 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 3.31 3.15 1.18 0.71
4 750810C RMC406RVRKNPT 7.97 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 4.35 3.15 1.18 0.71
2 750811C RMC208RVRKNPT 6.77 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 2.87 3.54 1.38 0.87
3 750812C RMC308RVRKNPT 7.99 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 4.09 3.54 1.38 0.87
4 750813C RMC408RVRKNPT 9.21 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 5.31 3.54 1.38 0.87
2 750814C RMC210RVRKNPT 6.93 1.30 3.94 0.39 40 0.94 3/8 0.49 010X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 3.03 3.54 1.38 0.98
3 750815C RMC310RVRKNPT 8.23 1.30 3.94 0.39 40 0.94 3/8 0.49 010X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 4.33 3.54 1.38 0.98
4 750816C RMC410RVRKNPT 9.53 1.30 3.94 0.39 40 0.94 3/8 0.49 010X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 5.63 3.54 1.38 0.98

HPMC Series Performance Charts

HPMC Series Performance Charts

HSMC Series Performance Charts

HSMC Series Performance Charts
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.

Part N° Description Overall Length (A) Number of Ports Unit Price (Ex. VAT) Quantity
4093-T22091
750748C 		RMC206R2KNPT 5.89 2 Quote Required
4093-T22092
750749C 		RMC306R2KNPT 6.93 3 Quote Required
4093-T22093
750750C 		RMC406R2KNPT 7.97 4 Quote Required
4093-T22094
750751C 		RMC506R2KNPT 9.02 5 Quote Required
4093-T22095
750752C 		RMC606R2KNPT 10.06 6 Quote Required
4093-T22096
750753C 		RMC706R2KNPT 12.32 7 Quote Required
4093-T22097
750754C 		RMC806R2KNPT 13.46 8 Quote Required
4093-T22098
750755C 		RMC208R2KNPT 6.77 2 Quote Required
4093-T22099
750756C 		RMC308R2KNPT 7.99 3 Quote Required
4093-T22100
750757C 		RMC408R2KNPT 9.21 4 Quote Required
4093-T22101
750758C 		RMC508R2KNPT 10.43 5 Quote Required
4093-T22102
750759C 		RMC608R2KNPT 12.48 6 Quote Required
4093-T22103
750760C 		RMC708R2KNPT 13.78 7 Quote Required
4093-T22104
750761C 		RMC808R2KNPT 15.08 8 Quote Required
4093-T22105
750762C 		RMC210R2KNPT 6.93 2 Quote Required
4093-T22106
750763C 		RMC310R2KNPT 8.23 3 Quote Required
4093-T22107
750764C 		RMC410R2KNPT 9.53 4 Quote Required
4093-T22108
750765C 		RMC510R2KNPT 11.57 5 Quote Required
4093-T22109
750766C 		RMC610R2KNPT 12.95 6 Quote Required
4093-T22110
750767C 		RMC710R2KNPT 14.33 7 Quote Required
4093-T22111
750768C 		RMC810R2KNPT 16.26 8 Quote Required
4093-T22112
750769C 		RMC212R2KNPT 7.60 2 Quote Required
4093-T22113
750770C 		RMC312R2KNPT 9.06 3 Quote Required
4093-T22114
750771C 		RMC412R2KNPT 10.51 4 Quote Required
4093-T22115
750772C 		RMC512R2KNPT 12.52 5 Quote Required
4093-T22116
750773C 		RMC612R2KNPT 15.20 6 Quote Required
4093-T22117
750774C 		RMC712R2KNPT 16.73 7 Quote Required
4093-T22118
750775C 		RMC812R2KNPT 18.27 8 Quote Required
4093-T22119
750776C 		RMC218R2KNPT 8.66 2 Quote Required
4093-T22120
750777C 		RMC318R2KNPT 10.35 3 Quote Required
4093-T22121
750778C 		RMC418R2KNPT 12.05 4 Quote Required
4093-T22122
750779C 		RMC518R2KNPT 14.84 5 Quote Required
4093-T22123
750780C 		RMC225R2KNPT 10.08 2 Quote Required
4093-T22124
750781C 		RMC325R2KNPT 12.13 3 Quote Required
4093-T22125
750782C 		RMC425R2KNPT 14.17 4 Quote Required
4093-T22126
750783C 		RMC525R2KNPT 17.32 5 Quote Required
4093-T22127
750784C 		RMC231R2KNPT 11.30 2 Quote Required
4093-T22128
750785C 		RMC331R2KNPT 13.70 3 Quote Required
4093-T22129
750786C 		RMC431R2KNPT 16.10 4 Quote Required
4093-T22130
750787C 		RMC531R2KNPT 20.87 5 Quote Required
Availability Usually 1-2 Working Days - 1pm cut-off
Description

HPMC/HSMC Series Rotary Union

Features and Benefits

  • High Pressure or High Speed Applications - Duff-Norton multi-port Rotary Unions are available in both high pressure (HPMC Series) and high speed (HSMC Series) configurations.
  • Pressures Up to 5,880 psi - HPMC Series Rotary Unions are designed for higher pressure, available with up to eight ports as standard and are suitable for use in low speed applications for pressures up to 5,880 psi.
  • Available up to 4 Ports - HSMC Series Rotary Unions are available with up to four ports as standard.
  • Speeds up to 3,000 RPM - HSMC Series is perfect for low pressure applications, up to 175 psi with rotational speeds up to 3,000 RPM.
  • No Cross Contamination - Feel free to run dissimilar fluids through Duff-Norton Multi-Port Rotary Unions as each port is always individually sealed eliminating cross contamination between circuits.
HPMC Dims and Specs

HPMC Series Muti-Port Rotary Union Dimensional Diagram

 

HPMC Series Muti Port Rotary Union Diagram
No. of Ports Part No. Desc. A B C D E & Vg6 F G (npt) H Ref. O-ring I J K L M N O P Q R S T U
2 750748C RMC206R2KNPT 5.89 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 2.26 3.15 1.18 0.39 0.71 3/8
3 750749C RMC306R2KNPT 6.93 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 3.31 3.15 1.18 0.39 0.71 3/8
4 750750C RMC406R2KNPT 7.97 1.04 3.15 0.24 35 0.87 1/8

0.35

 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 4.35 3.15 1.18 0.39 0.71 3/8
5 750751C RMC506R2KNPT 9.02 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 5.39 3.15 1.18 0.39 0.71 3/8
6 750752C RMC606R2KNPT 10.06 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 6.44 3.15 1.18 0.39 0.71 3/8
7 750753C RMC706R2KNPT 12.32 1.14 3.94 0.24 40 1.06 1/8 0.35 06X01.5 2.83 0.43 3.50 0.79 0.47 M8 1.26 8.43 3.54 1.38 0.47 0.71 1/2
8 750754C RMC806R2KNPT 13.46 1.14 3.94 0.24 40 1.06 1/8 0.35 06X01.5 2.83 0.43 3.50 0.79 0.47 M8 1.26 9.57 3.54 1.38 0.47 0.71 1/2
2 750755C RMC208R2KNPT 6.77 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 2.87 3.54 1.38 0.31 0.87 1/4
3 750756C RMC308R2KNPT 7.99 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 4.09 3.54 1.38 0.31 0.87 1/4
4 750757C RMC408R2KNPT 9.21 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 5.31 3.54 1.38 0.31 0.87 1/4
5 750758C RMC508R2KNPT 10.43 1.22 3.94 0.31 40 1.02 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 6.54 3.54 1.38 0.39 0.87 3/8
6 750759C RMC608R2KNPT 12.48 1.30 4.53 0.31 55 1.48 1/4 0.47 R6A 3.39 0.43 3.80 0.79 0.55 M10 1.46 8.11 4.53 1.97 0.47 0.87 1/2
7 750760C RMC708R2KNPT 13.78 1.30 4.53 0.31 55 1.48 1/4 0.47 R6A 3.39 0.43 3.80 0.79 0.55 M10 1.46 9.41 4.53 1.97 0.47 0.87 1/2
8 750761C RMC808R2KNPT 15.08 1.30 4.53 0.31 55 1.48 1/4 0.47 R6A 3.39 0.43 3.80 0.79 0.55 M10 1.46 10.71 4.53 1.97 0.47 0.87 1/2
2 750762C RMC210R2KNPT 6.93 1.30 3.94 0.39 40 0.94 3/8 0.49 0.10X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 3.03 3.54 1.38 0.31 0.98 1/4
3 750763C RMC310R2KNPT 8.23 1.30 3.94 0.39 40 0.94 3/8 0.49 0.10X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 4.33 3.54 1.38 0.31 0.98 1/4
4 750764C RMC410R2KNPT 9.53 1.30 3.94 0.39 40 0.94 3/8 0.49 0.10X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 5.63 3.54 1.38 0.31 0.98 1/4
5 750765C RMC510R2KNPT 11.57 1.38 4.53 0.39 55 1.34 3/8 0.49 0.10X01.3 3.39 0.43 3.84 0.79 0.55 M10 1.46 7.20 4.53 1.97 0.47 0.98 1/2
6 750766C RMC610R2KNPT 12.95 1.38 4.53 0.39 55 1.34 3/8 0.49 0.10X01.3 3.39 0.43 3.84 0.79 0.55 M10 1.46 8.58 4.53 1.97 0.47 0.98 1/2
7 750767C RMC710R2KNPT 14.33 1.38 4.53 0.39 55 1.34 3/8 0.49 0.10X01.3 3.39 0.43 3.84 0.79 0.55 M10 1.46 9.96 4.53 1.97 0.47 0.98 1/2
8 750768C RMC810R2KNPT 16.26 1.38 5.51 0.39 70

1.85

 3/8 0.49 0.10X01.3 4.25 0.51 4.27 0.98 0.59 M12 1.57 11.42 5.31 2.56 0.71 0.98 3/4
2 750769C RMC212R2KNPT 7.60 1.46 4.53 0.47 55 1.26 1/2 0.69 R10 3.39 0.43 3.88 0.79 0.55 M12 1.46 3.23 4.53 1.97 0.39 1.26 3/8
3 750770C RMC312R2KNPT 9.06 1.46 4.53 0.47 55 1.26 1/2 0.69 R10 3.39 0.43 3.88 0.79 0.55 M12 1.46 4.69

4.53

 1.97 0.39 1.26 3/8
4 750771C RMC412R2KNPT 10.51 1.46 4.53 0.47 55 1.26 1/2 0.69 R10 3.39 0.43 3.88 0.79 0.55 M12 1.46 6.14 4.53 1.97 0.39 1.26 3/8
5 750772C RMC512R2KNPT 12.52 1.46 5.51 0.47 70 1.65 1/2 0.69 R10 4.25 0.51 4.31 0.98 0.59 M12 1.57 7.72 5.31 2.56 0.47 1.26 1/2
6 750773C RMC612R2KNPT 15.20 1.54 6.69 0.47 90 2.13 1/2 0.69 R10 5.20 0.67 4.80 1.18 0.63 M12 1.77 9.72 6.30 3.35 0.71 1.26 3/4
7 750774C RMC712R2KNPT 16.73 1.54 6.69 0.47 90 2.13 1/2 0.69 R10 5.20 0.67 4.80 1.18 0.63 M12 1.77 11.26 6.30 3.35 0.71 1.26 3/4
8 750775C RMC812R2KNPT 18.27 1.54 6.69 0.47 90 2.13 1/2 0.69 R10 5.20 0.67 4.80 1.18 0.63 M12 1.77 12.80 6.30 3.35 0.71 1.26 3/4
2 750776C RMC218R2KNPT 8.66 1.69 5.51 0.71 70 1.50 3/4 0.94 R14 4.25 0.51 4.43 0.98 0.59 M12 1.57 3.86 5.31 2.56 0.39 1.46 3/8
3 750777C RMC318R2KNPT 10.35 1.69 5.51 0.71 70 1.50 3/4 0.94 R14 4.25 0.51 4.43 0.98 0.59 M12 1.57 5.55 5.31 2.56 0.39 1.46 3/8
4 750778C RMC418R2KNPT 12.05 1.69 5.51 0.71 70 1.50 3/4 0.94 R14 4.25 0.51 4.43 0.98 0.59 M12 1.57 7.24 5.31 2.56 0.39 1.46 3/8
5 750779C RMC518R2KNPT 14.84 1.77 6.69 0.71 90 2.20 3/4 0.94 R14 5.20 0.67 4.92 1.18 0.63 M12 1.77 9.37 6.30 3.35 0.71 1.46 3/4
2 750780C RMC225R2KNPT 10.08 2.05

6.69

 0.98 90 1.97 1 1.26 R19 5.20 0.67 5.06 1.18 0.63 M14 1.77 4.61 6.30 3.35 0.47 1.69 1/2
3 750781C RMC325R2KNPT 12.13

2.05

 6.69 0.98 90 1.97 1 1.26 R19 5.20 0.67 5.06 1.18 0.63 M14 1.77 6.65 6.30 3.35 0.47 1.69 1/2
4 750782C RMC425R2KNPT 14.17 2.05 6.69 0.98 90 1.97 1 1.26 R19 5.20 0.67 5.06 1.18 0.63 M14 1.77 8.70 6.30 3.35 0.47 1.69 1/2
5 750783C RMC525R2KNPT 17.32 2.17 7.48 0.98 105 2.72 1 1.26 R19 5.91 0.67 5.41 1.18 0.63 M14 2.05 11.38 7.48 3.94 0.71 1.69 3/4
2 750784C RMC231R2KNPT 11.30 2.40 7.48 1.22 105 2.24 1-1/4 1.44 R22 5.91 0.67 5.53 1.18 0.63 M14 2.05 5.35 7.48 3.94 0.47 2.17 1/2
3 750785C RMC331R2KNPT 13.70 2.40 7.48 1.22 105 2.24 1-1/4 1.44 R22 5.91 0.67 5.53 1.18 0.63 M14 2.05 7.76 7.48 3.94 0.47 2.17 1/2
4 750786C RMC431R2KNPT 16.10 2.40 7.48 1.22 105 2.24 1-1/4 1.44 R22 5.91 0.67 5.53 1.18 0.63 M14 2.05 10.16 7.48 3.94 0.47 2.17 1/2
5 750787C RMC531R2KNPT 20.87 2.64 9.06 1.22 140 3.43 1-1/4 1.44 R22 7.24 0.67 6.28 1.18 0.79 M16 2.44 13.90 9.06 5.12 0.71 2.17 3/4
HSMC Dims and Specs

HSMC Series Multi-Port Rotary Union Dimensional Diagram

HSMC Series Multi Port Rotary Union Diagram
No. of Ports Part No. Desc. A B C D V F G (NPT) H Ref. O-ring I J K L M N O P Q R T
2 750889C RMC206RVRKNPT 5.89 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 2.26 3.15 1.18 0.71
3 750809C RMC306RVRKNPT 6.93 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 3.31 3.15 1.18 0.71
4 750810C RMC406RVRKNPT 7.97 1.04 3.15 0.24 35 0.87 1/8 0.35 06X01.5 2.36 0.35 3.05 0.59 0.39 M8 1.26 4.35 3.15 1.18 0.71
2 750811C RMC208RVRKNPT 6.77 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 2.87 3.54 1.38 0.87
3 750812C RMC308RVRKNPT 7.99 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 4.09 3.54 1.38 0.87
4 750813C RMC408RVRKNPT 9.21 1.22 3.94 0.31 40 0.94 1/4 0.47 R6A 2.83 0.43 3.54 0.79 0.47 M10 1.26 5.31 3.54 1.38 0.87
2 750814C RMC210RVRKNPT 6.93 1.30 3.94 0.39 40 0.94 3/8 0.49 010X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 3.03 3.54 1.38 0.98
3 750815C RMC310RVRKNPT 8.23 1.30 3.94 0.39 40 0.94 3/8 0.49 010X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 4.33 3.54 1.38 0.98
4 750816C RMC410RVRKNPT 9.53 1.30 3.94 0.39 40 0.94 3/8 0.49 010X01.3 2.83 0.43 3.58 0.79 0.47 M10 1.26 5.63 3.54 1.38 0.98
Performance Charts

HPMC Series Performance Charts

HPMC Series Performance Charts

HSMC Series Performance Charts

HSMC Series Performance Charts
Rotary Union Design

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.

Pricing (Buy/Quote)

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