rx rotary union - media.kadant.com · 3 - bsp rh 12k51350 74 200 327 45* 397 29 kg 3" - bsp lh...

Engineered reliability for demanding applications.

Advanced rotaryunions for fluidand air service.

RX Rotary UnionFor water, air, and thermal oil service

RX Rotary Union

2

Overview of the RX Rotary Union ................................................................................................................................. 3

3⁄8" to 11⁄2"....................................................................................................................................................................... 4

2" to 3"............................................................................................................................................................................ 6

4" to 5".......................................................................................................................................................................... 10

4" to 6" Tapered Roller Bearings................................................................................................................................. 12

Repair Kits.......................................................................................................................................................................14

Quick Release Flange .....................................................................................................................................................16

Technical Data ............................................................................................................................................................... 18

Installation Recommendations..................................................................................................................................... 20

Other Rotary Unions ..................................................................................................................................................... 22

Consult Kadant Johnson for application recommendations and

for high-temperature RX-1, RX-2, and RX-3 configurations.

Recommended

Acceptable

Not Recommended

TypeMedia Pressure (Max.) Temperature (Max.) Speed

(RPM)Water Thermal Oil Steam Air BAR PSI °C °F

3⁄8" to 11⁄2"

RX 13 200 105 220 3,500

RX-1 13 200 177 350 3,500

RX-2 13 200 204 400 3,500

RX-3 13 200 232 450 3,500

2" to 3"

RX 13 200 105 220 1,000

RX-1 13 200 177 350 1,000

RX-2 13 200 204 400 1,000

RX-3 13 200 250 482 1,000

4" to 6"

RX 10 150 149 300 750

RX-1 10 150 160 320 750

RX-2 10 150 204 400 750

RX-3 10 150 260 500 750

Quick Select Chart

Single flow rotary union Dual flow rotary union

Overview

3

Stainlesssteel springs

Smooth flowelbow

Silicon carbide orcarbon graphite

seal ring

Two-piecehousing

Precisionball bearings

Stainless steelrotor

Tungsten carbidecounterseat

Featuresu Springs located outside the flow area

u Stainless steel rotor

u Two-piece housing, on-machine seal replacement

u O-rings fully captured in glands

u Balanced seal assembly

u Full flow area

u Matched seal faces

u Bearing isolation system available

u Tungsten carbide counterseat

Benefitsu Improved reliability, increased flow area

u Corrosion resistant

u Reduced down-time and cost of maintenance

u Robust design, no risk of o-ring slipping

u Extended operating life

u Low pressure drop

u Materials selected for specific service

u Increased bearing protection

u Added toughness and shock resistance

Tapped vent holes

O-ring secondary seal

The RX rotary union connects stationary piping to a rotating device. The fluid is sealed by precision, micro-lapped seals thatprovide a uniform, full-flow design. The union is supported by two widely-spaced anti-friction bearings and is available with abearing isolation system for added bearing protection. The RX union is capable of intermittent dry running and features a 100%pure-molded carbon graphite or silicon carbide seal and tungsten carbide counterseat.

3⁄8" to 11⁄2"

4

MD

J 2

CA

G

P

S K

H

F

Single flow taper thread rotor Dual flow straight thread rotor

MNPT

K Rotor Thread

Part ID

A C D F G H J1 J2P

NPT

S

Approx.WeightSingle

FlowDual FlowFixed Pipe

Dual FlowRotating

Pipe

NPTFixed Pipe

RotatingPipe OD

3⁄8"

3⁄8" NPT RH 12K03125 12K04100 –0.38" 2.54" 3.92" 0.41" 1.42" 4.60" 4.67" 6.01" 1⁄4" 1⁄4"* – 2 lb

3⁄8" NPT LH 12K03150 12K04125 –5⁄8" - 18 UNF RH 12K03225 12K04200 –

0.38" 2.54" 3.92" 0.62" 1.42" 4.60" 4.67" 6.01" 1⁄4" 1⁄4"* – 2 lb5⁄8" - 18 UNF LH 12K03250 12K04250 –3⁄8" BSP RH 12K03450 12K04525 –

10 64 100 16 36 123 119 153 1⁄4" M6 x 1"* – 0.9 Kg3⁄8" BSP LH 12K03460 12K04550 –

1⁄2"

1⁄2" NPT RH 12K06125 12K07125 12K072500.50" 2.54" 4.03" 0.53" 1.42" 4.60" 4.79" 6.01" 3⁄8" 1⁄8"

0.375"

0.373"3 lb

1⁄2" NPT LH 12K06150 12K07150 12K072603⁄4" - 16 UNF RH 12K06325 12K07390 12K07400

0.50" 2.54" 4.03" 0.75" 1.42" 4.60" 4.79" 6.01" 3⁄8" 1⁄8"0.375"

0.373"3 lb

3⁄4" - 16 UNF LH 12K06350 12K07392 12K074051⁄2" BSP RH 12K06425 12K07425 12K07725

13 64 102 19 36 123 122 153 3⁄8" 1⁄8"9.98

9.931.4 Kg

1⁄2" BSP LH 12K06450 12K07450 12K07750

3⁄4"

3⁄4" NPT RH 12K11025 12K12125 12K123000.68" 2.90" 4.40" 0.56" 1.71" 5.25" 5.40" 6.82" 1⁄2" 1⁄4"

0.500"

0.498"5 lb

3⁄4" NPT LH 12K11050 12K12150 12K12325

1" - 14 UNS RH 12K11180 12K12190 12K122050.68" 2.90" 4.40" 0.75" 1.71" 5.25" 5.40" 6.82" 1⁄2" 1⁄4"

0.500"

0.498"5 lb

1" - 14 UNS LH 12K12000 12K12215 12K122303⁄4" BSP RH 12K12525 12K12240 12K12400

17 73 113 19 43 134 138 173 1⁄2" 1⁄4"12.98

12.932.3 Kg

3⁄4" BSP LH 12K12550 12K12250 12K12425

Standard RX Ratings

Pressure: 200 psig (13 bar)

Temperature: 220°F (105°C)

Speed, straight thread: 3,500 RPM

Speed, NPT thread: 1,500 RPM

Media: Water, Air

Consult Kadant Johnson for RX-1, RX-2, and RX-3unions for applications up to 450°F (232°C).

MD

J 1

C

K

A

F

* Fixed tube O.D. Dimensions are for reference only and subject to change.

Single and dual flow

5

MNPT

K Rotor Thread

Part ID

A C D F G H J1 J2P

NPT

S

Approx.WeightSingle

FlowDual FlowFixed Pipe

Dual FlowRotating

Pipe

NPTFixed Pipe

RotatingPipe OD

1"

1" NPT RH 12K16125 12K17275 12K174001.00" 3.58" 5.43" 0.66" 2.17" 6.47" 6.54" 8.40" 1⁄2" 3⁄8"

0.625"

0.623"8 lb

1" NPT LH 12K16150 12K17290 12K17425

11⁄2" - 12 UNF RH 12K16225 12K17175 12K177251.00" 3.58" 5.43" 1.12" 2.17" 6.47" 6.54" 8.40" 1⁄2" 3⁄8"

0.625"

0.623"8 lb

11⁄2" - 12 UNF LH 12K16250 12K17200 12K17750

1" BSP RH 12K16145 12K17250 12K1782525 91 138 28 55 171 166 213 1⁄2" 3⁄8"

15.98

15.933.6 Kg

1" BSP LH 12K16170 12K17260 12K17850

11⁄4"

11⁄4" NPT RH 12K26125 12K27100 12K277851.25" 3.78" 6.09" 0.68" 2.64" 7.86" 7.45" 9.71" 3⁄4" 1⁄2"

0.791"

0.789"10 lb

11⁄4" NPT LH 12K26150 12K27110 12K27790

13⁄4" - 12 UN RH 12K26325 12K27500 12K277751.25" 3.78" 6.09" 1.19" 2.64" 7.86" 7.45" 9.71" 3⁄4" 1⁄2"

0.791"

0.789"10 lb

13⁄4" - 12 UN LH 12K26350 12K27510 12K27780

11⁄4" BSP RH 12K26425 12K27625 12K2782532 96 155 30 67 200 189 247 3⁄4" 1⁄2"

21.98

21.934.5 Kg

11⁄4" BSP LH 12K26450 12K27650 12K27850

11⁄2"

11⁄2" NPT RH 12K21125 12K22225 12K225501.50" 4.57" 6.86" 0.68" 2.70" 8.11" 8.36" 10.54" 3⁄4" 3⁄4"

1.000"

0.998"16 lb

11⁄2" NPT LH 12K21150 12K22250 12K22450

2" - 12 UN RH 12K21625 12K22500 12K225551.50" 4.57" 7.16" 1.12" 2.70" 8.41" 8.66" 10.84" 3⁄4" 3⁄4"

1.000"

0.998"16 lb

2" - 12 UN LH 12K21650 12K22525 12K22575

11⁄2" BSP RH 12K21825 12K22600 12K2272538 116 182 28 68 214 220 276 3⁄4" 3⁄4"

25.98

25.937.2 Kg

11⁄2" BSP LH 12K21850 12K22625 12K22750


Silicon carbide or carbongraphite seal ring

Two-piecehousing




Smooth flowelbow

O-ring secondary seal

RX

Dimensions are for reference only and subject to change.

6

MD

F

J

CK

A

2" to 3"

MNPT

K Rotor

Part ID A C D F JApprox.Weight

2"

2" NPT RH 12K406001.90" 5.60" 9.00" 0.70" 11.00" 28 lb

2" NPT LH 12K40625

2" - BSP RH 12K4065049 143 229 29* 280 13 Kg

2" - BSP LH 12K40660

Q Flange 12K40675 1.90" 5.60" 9.40" 2.60" 11.40" 28 lb

21⁄2"

21⁄2" NPT RH 12K456002.40" 6.90" 10.70" 0.93" 13.20" 43 lb

21⁄2" NPT LH 12K45625

21⁄2" - BSP RH 12K4564061 174 271 38* 334 20 Kg

21⁄2" - BSP LH 12K45645

Q Flange 12K40630 2.40" 6.90" 10.70" 2.80" 13.20" 43 lb

3"

3" NPT RH 12K511002.90" 7.90" 12.90" 1.02" 15.60" 64 lb

3" NPT LH 12K51125

3" - BSP RH 12K5135074 200 327 45* 397 29 Kg

3" - BSP LH 12K51360

Q Flange 12K51135 2.90" 7.90" 12.50" 3.30" 15.30" 64 lb

Standard RX Ratings



Speed, flanged rotor: 1,000 RPM

Speed, threaded rotor: 750 RPM

Media: Water, Thermal Oil


MD

F

J

K

A

C

Taper thread rotor Q flange rotor

*Lock-up dimension for straight threads. Dimensions are for reference only and subject to change.

Single flow

J

V

D

B E

M

A

K

C

N

7


Seal chamberbarrier

Silicon carbide or carbongraphite seal ring

Stainless steelassembly plate

Two-piecehousing




* For 2" and 21⁄2" sizes, the ‘B’ dimension is the ID of the counterbore. Counterbore depth is 0.25" (6.4 mm). For 3" size, the ‘B’ dimension is the OD of the pilot. Pilot length 0.30" (7.6 mm).Dimensions are for reference only and subject to change.

MK

RotorPart ID A B* C D E J N V

Approx.Weight

2" NPT 9" O.D. Flange 12K40690 1.90" 8.32" 5.60" 9.10" 6.38" 11.10" 4 x 1⁄2" 2.60" 39 lb

2" (150 lb ASA) 9" O.D. Flange 12K40695 1.90" 8.32" 5.60" 10.70" 6.38" 13.90" 4 x 1⁄2" 3.70" 41 lb

21⁄2" NPT 9" O.D. Flange 12K45675 2.40" 8.32" 6.90" 10.70" 6.38" 12.90" 4 x 1⁄2" 3.00" 53 lb

21⁄2" (150 lb ASA) 9" O.D. Flange 12K45685 2.40" 8.32" 6.90" 12.20" 6.38" 15.60" 4 x 1⁄2" 4.10" 56 lb

3" NPT 9" O.D. Flange 12K51150 2.90" 4.00" 7.90" 12.51" 7.56" 15.30" 6 x 1⁄2" 3.50" 72 lb

3" (150 lb ASA) 9" O.D. Flange 12K51190 2.90" 4.00" 7.90" 13.70" 7.56" 17.70" 6 x 1⁄2" 4.90" 75 lb

M

D

VC

K

A

J

E B

N

2" and 21⁄2" integral flange 3" integral flange

RX

Standard RX Ratings



Speed, flanged rotor: 1,000 RPM

Speed, threaded rotor: 750 RPM



P

M

S

J

G

F

C

A

D

K

H

8

2" to 3"

MNPT

K Rotor

Part ID

A C D F G H JP

NPT

SApprox.WeightFixed Pipe

RotatingPipe

NPTFixed Pipe

RotatingPipe OD

11⁄4"

2" NPT RH 12K41498 12K427041.90" 5.60" 9.00" 0.70" 3.15" 10.46" 13.20" 1" 1"

1.247"

1.244"30 lb

2" NPT LH 12K41499 12K42705

2" - BSP RH 12K42600 12K4281049 143 229 29* 79 269 336 1" 1"

31.67

31.5914 Kg

2" - BSP LH 12K42610 12K42820

Q Flange 12K42250 12K42875 1.90" 5.60" 9.40" 2.60" 3.15" 10.80" 13.60" 1" 1"1.247"

1.244"30 lb

21⁄2"

21⁄2" NPT RH 12K45900 12K459782.40" 6.90" 10.70" 0.93" 3.90" 12.10" 15.80" 11⁄2" 11⁄2"

1.877"

1.874"45 lb

21⁄2" NPT LH 12K45910 12K45980

21⁄2" - BSP RH 12K45930 12K4614061 174 271 38* 371 307 402 11⁄2" 11⁄2"

47.68

47.6020 Kg

21⁄2" - BSP LH 12K45940 12K46145

Q Flange 12K45995 12K46205 2.40" 6.90" 10.66" 2.80" 3.93" 12.90" 15.80" 11⁄2" 11⁄2"1.877"

1.874"45 lb

2"

3" NPT RH 12K52090 12K529182.90" 7.90" 12.90" 1.02" 4.90" 14.70" 19.30" 2" 2"

2.247"

2.244"71 lb

3" NPT LH 12K52095 12K52920

3" - BSP RH 12K52210 12K5293874 200 327 45* 453 373 491 2" 2"

57.07

57.0032 Kg

3" - BSP LH 12K52220 12K52936

Q Flange 12K52275 12K52950 2.90" 7.90" 12.50" 3.30" 4.90" 15.60" 19.00" 2" 2"2.247"

2.244"71 lb

P

M

S

J

G

F

C

A

D

K

H

Taper thread rotor Q flange rotor

*Lock-up dimension for straight threads. Dimensions are for reference only and subject to change.

Dual flow

9


Smooth flowelbow

Seal chamberbarrier

Silicon carbide orcarbon graphite

seal ring

Stainless steelassembly plate

Two-piecehousing




P M

B E

S

D

V

J

A

K

G

C

H

N

* For 2" and 21⁄2" sizes, the ‘B’ dimension is the ID of the counterbore. Counterbore depth is 0.25" (6.4 mm). For 3" size, the ‘B’ dimension is the OD of the pilot. Pilot length 0.30" (7.6 mm).Dimensions are for reference only and subject to change.

MK

Rotor

Part ID

A B* D E G H J N P

S

VApprox.WeightFixed

PipeRotating

PipeNPT

Fixed PipeRotatingPipe OD

11⁄4" NPT 9" O.D. Flange 12K41520 12K42720 1.90" 8.32" 9.12" 6.38" 3.15" 10.33" 13.34" 4 x 1⁄2" 1" 1" 1.247"

1.244"2.60" 40 lb

1" (150 lb ASA) 9" O.D. Flange 12K42708 12K42718 1.90" 8.32" 8.70" 6.38" 4.80" 10.75" 15.80" 4 x 1⁄2" 1" 1" 1.247"

1.244"4.00" 45 lb

11⁄2" NPT 9" O.D. Flange 12K46110 12K46125 2.40" 8.32" 10.40" 6.38" 3.90" 12.40" 15.60" 4 x 1⁄2" 11⁄2" 11⁄2"1.877"

1.874"3.00" 57 lb

11⁄2" (150 lb ASA) 9" O.D. Flange 12K46800 12K46825 2.40" 8.32" 10.30" 6.38" 6.20" 12.40" 19.20" 4 x 1⁄2" 11⁄2" 11⁄2"1.877"

1.874"4.60" 69 lb

2" NPT 9" O.D. Flange 12K52675 12K52725 2.90" 4.00" 12.50" 7.56" 4.90" 15.60" 19.00" 6 x 1⁄2" 2" 2" 2.247"

2.244"3.50" 79 lb

2" (150 lb ASA) 9" O.D. Flange 12K53220 12K53240 2.90" 4.00" 12.00" 7.56" 6.80" 14.71" 22.20" 6 x 1⁄2" 2" 2" 2.247"

2.244"5.10" 94 lb

N

SP

M

J

K

H

G

V

D

C

AE B

2" and 21⁄2" integral flange 3" integral flange

RX

10

SP

G

V

JB

CM

D EA

H

6 x 3/4"

JB

V

M

D EA

6 x 3/4"

Dual flow threaded connectionSingle flow threaded connection

*Pilot length 0.30" (7.6 mm).

4" to 5"

FlowM

NPTPart ID A B C D* E G H J

PNPT

S VApprox.Weight

Single 4" 12K556004.00" 16.34" – 4.75" 9.00" – – 19.06"

– –6.62" 154 lb

100 415 – 120 229 – – 484 168 70 Kg

Dual 21⁄2" 12K577004.00" 19.06" 13.15" 4.75" 9.00" 4.38" 17.13" 20.88"

21⁄2"2.750"

2.748"

3.00" 145 lb

100 484 334 120 229 111 436 530 76 66 Kg

Standard RX Ratings



Speed: 750 RPM



11

Two-piecehousing

Smooth flowelbow

Pre-packagedbearing cartridgeStainless steel

springs

Integralflange

Micro-lapped carbidecounterseat

Carbon graphiteseal ring

DU bushingfor rotating pipe


B

V

M

D E

J

A

6 x 3/4"

JB

M C

D E

S

G

V

P

AH

6 x 3/4"

Single flow flanged connection Dual flow flanged connection

Deep groove ball bearing support

FlowM

(150 lb ASA)Part ID A B C D* E G H J

P(150 lb ASA)

S VApprox.Weight

Single 4" 12K557004.00" 16.34" – 4.75" 9.00" – – 20.88"

– –6.50" 164 lb

100 415 – 120 229 – – 530 165 75 Kg

Dual 21⁄2" 12K582504.00" 22.91" 13.50" 4.75" 9.00" 7.12" 17.00" 26.62"

21⁄2"2.750"

2.748"

5.25" 209 lb

100 582 343 120 229 181 433 677 133 95 Kg

Single 5" 12K606005.00" 19.10" – 6.29" 8.86" – – 22.97"

– –7.63" 264 lb

127 485 – 160 225 – – 583 194 120 Kg

Dual 3" 12K610505.00" 26.00" 16.88" 6.29" 8.86" 8.38" 19.94" 29.75"

3"3.324"

3.322"

5.50" 280 lb

127 661 428 160 225 212 507 756 140 127 Kg

RX


12

M

SP

G

V

JB

C

D EHA

6 x 3/4"J

B

V

M

D EA

6 x 3/4"

Dual flow threaded connectionSingle flow threaded connection


4" to 6"

FlowM

NPTA B C D* E G H J

P NPT

S VApprox.Weight

Single 4"4.00" 18.50" – 4.75" 9.00" – – 21.19"

– –6.62" 154 lb

100 469 – 120 229 – – 538 168 70 Kg

Dual 21⁄2"4.00" 21.12" 15.25" 4.75" 9.00" 4.38" 17.13" 22.94"

21⁄2" 2.750"

2.748"

3.00" 145 lb

100 536 386 120 229 111 436 582 76 66 Kg

Maximum RX Ratings



Speed: 750 RPM




13

B

V

M

D E

J

A

N

JB

M C

D E

S

G

V

P

AH

N

Single flow flanged connection Dual flow flanged connection

* For 4" and 5" sizes, pilot length is 0.30" (7.6 mm).Pilot length for 6" size is 0.56" (14.2 mm).

Tapered roller bearing support

Two-piecehousing

Smooth flowelbow

Pre-packagedbearing cartridge

Micro-lappedcounterseat

Full-flowrotor

Taperedroller bearings

Stainless steelsprings

Carbon graphite orsilicon carbide seal ring

Antimony impregnatedbushing for rotating pipe

FlowM

(150 lb ASA)A B C D* E G H J N P

(150 lb ASA) S VApprox.Weight

Single 4"4.00" 18.50" – 4.75" 9.00" – – 23.00"

6 x 3⁄4" – –6.50" 164 lb

100 469 – 120 229 – – 584 165 75 Kg

Dual 21⁄2"4.00" 25.00" 15.62" 4.75" 9.00" 7.12" 17.00" 28.75"

6 x 3⁄4" 21⁄2"2.750"

2.748"

5.25" 209 lb

100 636 397 120 229 181 433 730 133 95 Kg

Single 5"5.00" 19.13" – 6.29" 8.86" – – 24.31"

6 x 3⁄4" – –7.63" 264 lb

127 486 – 160 225 – – 617 194 120 Kg

Dual 3"5.00" 26.06" 16.88" 6.29" 8.86" 8.38" 19.94" 29.81"

6 x 3⁄4" 3"3.324"

3.322"

5.50" 280 lb

127 662 428 160 225 212 507 757 140 127 Kg

Single 6"6.00" 20.35" – 6.94" 9.75" – – 25.85"

8 x 3⁄4" – –9.00" –

152 517 – 176 248 – – 657 227 –

Dual 4"6.00" 30.43" 19.60" 6.94" 9.75" 9.00" 22.86" 34.92"

8 x 3⁄4" 4"4.323"

4.319"

7.00" –

152 773 498 176 248 229 581 887 178 –

RX-1, RX-2, RX-3


Repair Kits

RX RX-1 RX-2* RX-3*

Seal Ring Material Carbon Graphite Carbon Graphite Silicon Carbide Silicon Carbide

Counterseat Material Tungsten Carbide Tungsten Carbide Silicon Carbide** Silicon Carbide**

Back-up Lip Seal No Yes Yes Yes

Bearings (3⁄8 – 3”) Deep Groove Deep Groove Deep Groove Deep Groove

Bearings (4” – 6”) Deep Groove Tapered Roller Tapered Roller Tapered Roller

Type RX rotary unions feature a cartridge design that allows for application-specific configurations. For demanding applicationswith higher operating temperatures, rotational speed, or lower quality fluids, three cartridge options are available: RX-1, RX-2,and RX-3.

Lip seal bearingprotector

Seal ring

Lip seal bearingprotector

Tapered roller bearing withhigh temperature grease

Counterseat

Secondaryseal

* RX-2 and RX-3 not recommended for dry running.** Tungsten carbide counterseat available for 5˝ and 6˝ unions.

14

15

RotaryUnion Size

CartridgeTemperature

(Max °F)

Part ID

Seal Repair Kit Bearing Repair Kit

3⁄8"

RX 220 12S74005 12S74010

RX-1 350 12S74015 12S74020

RX-2 400 12S74025 12S74030

RX-3 482 12S74035 12S74040

1⁄2"

RX 220 12S74005 12S74010

RX-1 350 12S74015 12S74020

RX-2 400 12S74025 12S74030

RX-3 482 12S74035 12S74040

3⁄4"

RX 220 12S75500 12S75505

RX-1 350 12S75510 12S75515

RX-2 400 12S75520 12S75525

RX-3 482 12S75530 12S75535

1"

RX 220 12S76500 12S76505

RX-1 350 12S76510 12S76515

RX-2 400 12S76520 12S76525

RX-3 482 12S76530 12S76535

11⁄4"

RX 220 12S77500 12S77505

RX-1 350 12S77501 12S77506

RX-2 400 12S77502 12S77507

RX-3 482 12S77503 12S77508

11⁄2"

RX 220 12S78200 12S78050

RX-1 350 12S78210 12S78060

RX-2 400 12S78220 12S78070

RX-3 482 12S78230 12S78080

2"

RX 220 12S90900 12S90950

RX-1 350 12S91000 12S91050

RX-2 400 12S91010 12S91060

RX-3 482 12S91020 12S91070

21⁄2"

RX 220 12S92000 12S92050

RX-1 350 12S92010 12S92060

RX-2 400 12S92020 12S92070

RX-3 482 12S92030 12S92080

3"

RX 220 12S93000 12S93020

RX-1 350 12S93001 12S93030

RX-2 400 12S93002 12S93040

RX-3 482 12S93004 12S93050

4"

RX 220 12S94010 12S94000

RX-1 350 12S94020 12S94002

RX-2 400 12S94025 12S94005

RX-3 500 12S94030 12S94045

5"

RX 220 12S95010 12S95000

RX-1 350 12S95015 12S95002

RX-2 400 12S95020 12S95004

RX-3 500 12S95030 12S95006

6"RX-1 350 12S98000 12S98055

RX-2 400 12S98005 12S98060

RX-3 500 12S98010 12S98065

Seal Repair Kit includes: Bearing Repair Kit includes:

u Seal ringu Counterseatu O-ringsu Springsu Head gasketu O-ring lubricant

u Seal repair kitu Bearingsu Retaining rings for body

and rotor

Quick Release Flange

Featuresu Split wedge construction for ease of installation

u Q-Flange can be used for LH and RH rotation

u Mounting with multiple bolts

Benefitsu Reduced installation and maintenance time

u Simplified inventory

u Easy installation with hand tools

Rotor

Split wedge

Metal Q-gasket

Journalflange

Q-rotorflange

Rotary

Union Size

*Flange Set Part IDNo. of Q-flange Holes

Water/Air Thermal Oil

1⁄2" 16E00050 – 4

3⁄4" 16E00150 16E00270 4

1" 16E00350 16E00360 4

11⁄4" 16E01250 16E01280 4

11⁄2" 16E01600 16E01610 4

2" 16E02150 16E02158 4

21⁄2" 16E02700 16E02704 4

3" 16E03100 16E03102 5

* Flange set includes Q-rotor flange, split wedge, metal gasket, and retaining clip. Non-standard flange drilling available on request.

16

17

A

G

ED

F

H

B

Rotary Union Size

A B D E F G HApprox.Weight

1⁄2" 0.62" 0.25" 3.75" 2.62" 0.50" 0.38" 0.82" 2 lb

3⁄4" 0.75" 0.31" 4.50" 3.00" 0.56" 0.44" 1.02" 3 lb

1" 0.94" 0.31" 5.00" 3.50" 0.56" 0.56" 1.28" 3 lb

11⁄4" 1.25" 0.38" 5.00" 3.50" 0.62" 0.56" 1.62" 3 lb

11⁄2" 1.50" 0.38" 5.50" 3.94" 0.75" 0.56" 1.88" 4 lb

2" 1.94" 0.50" 6.50" 4.75" 0.75" 0.56" 2.33" 6 lb

21⁄2" 2.38" 0.62" 6.50" 4.75" 0.75" 0.56" 2.84" 6 lb

3" 2.88" 0.75" 8.00" 6.75" 1.19" 0.69" 3.44" 13 lb


Technical Data

18

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

1 10 100 1000

Pre

ssur

e D

rop

(psi

)

RX Rotary Union (Single Flow)

Water Flow Rate (gpm)

6"5"4"3"2 1/

2"

2"1 1/

2"

1 1/

4"

1"3/4"

1/2"

3/8"

Rotary union sizingRotary unions that are used for liquid flow are typically sized so that the pressure drop is less than 3 psi (0.20 bar) for open-loopsystems and less than 6 psi (0.40 bar) for closed-loop systems. The pressure drop through a dual flow rotary union is higher thanthe pressure drop through a single flow union of the same size, because the internal flow area is less. Use the appropriate chartbelow for your configuration. Note that the pressure drop shown for dual flow unions is for the supply passage. The totalpressure drop (flow in and flow out) would be approximately 2x this value.

3/8"

1/2"

3/4"

1" 1 1/

4"

1 1/

2"

2" 2 1/

2"

3" 4" 5" 6"

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0.5 1 10 100 1000

Pre

ssur

e D

rop

(psi

)

RX Rotary Union (Dual Flow)

Water Flow Rate (gpm)

Weight

19

Nominal ScheduleOD

(inch)Wall(inch)

Internal Area(in2)

Pipe(lb/ft)

Water(lb/ft)

NPT Take-Up(inch)

3⁄8"40 0.675 0.091 0.19 0.57 0.08 0.41

80 0.675 0.126 0.14 0.74 0.06 0.41

1⁄2"40 0.840 0.109 0.30 0.85 0.13 0.53

80 0.840 0.147 0.23 1.09 0.10 0.53

3⁄4"40 1.050 0.113 0.53 1.13 0.23 0.56

80 1.050 0.154 0.43 1.47 0.19 0.56

1"40 1.315 0.133 0.86 1.68 0.37 0.66

80 1.315 0.179 0.72 2.17 0.31 0.66

11⁄4"40 1.660 0.140 1.50 2.27 0.65 0.68

80 1.660 0.191 1.28 3.00 0.56 0.68

11⁄2"40 1.900 0.145 2.04 2.72 0.88 0.68

80 1.900 0.200 1.77 3.63 0.77 0.68

2"40 2.375 0.154 3.36 3.65 1.45 0.70

80 2.375 0.218 2.95 5.02 1.28 0.70

21⁄2"40 2.875 0.203 4.79 5.79 2.07 0.93

80 2.875 0.276 4.24 7.66 1.84 0.93

3"40 3.500 0.216 7.39 7.58 3.20 1.02

80 3.500 0.300 6.61 10.25 2.86 1.02

4"40 4.500 0.237 12.73 10.79 5.51 –

80 4.500 0.337 11.50 14.99 4.98 –

5"40 5.563 0.258 20.01 14.62 8.66 –

80 5.563 0.375 18.19 20.78 7.88 –

6"40 6.625 0.280 28.89 18.98 12.51 –

80 6.625 0.432 26.07 25.58 11.29 –

Fastener SizeTorque (Ft-lbs)

Bolt Stress At Recommended

Torque (psi)

1⁄4" M6 5 42,000

– M8 13 42,000

3⁄8" M10 18 41,700

7⁄16" – 31 45,000

1⁄2" M12 35 33,000

9⁄16" M14 60 40,000

5⁄8" M16 60 29,000

3⁄4" M20 100 26,500

1" M24 200 23,000

Torque values

NPTtake-up

Common pipe dimensions NPT threaded pipe

Ordering informationIf you have an existing Kadant Johnson rotary union with a product label affixed tothe housing, the Part ID written on the label is all that is required to order areplacement union. For new applications or if no Part ID is available, the followingdata are requested:

1. Number of passages (single flow or dual flow)

2. Rotor type (threaded, Q-flange, or integral flange)

3. Rotor thread (right- or left-hand and type)

4. Supply pipe (none, fixed, or rotating)

5. Service (water, thermal oil, air, or steam)

6. Fluid pressure

7. Fluid temperature

8. Rotational speed (rpm)

9. Connection sizes shown on drawing (M, P, S, K)

www.kadant.com

Part ID

Order

TS

PS

P

M

S K

Recommendations

20

FiltrationIt is important to follow the filtration requirements recommended by the machinery manufacturer. Type RX rotary unions do notrequire additional filtration other than what is recommended for the fluid circulation system (typically 40–60 micron).

GuaranteeType RX rotary unions are tested prior to shipment and are warranted against manufacturing defects for 12 months. KadantJohnson’s global sales and service network stands behind its products and provides support to more than 150 countries worldwide.

Flexible hoseTo ensure free movement of the rotary union and elimination of side loading, the proper installation, type, and length of flexiblehose should be used.

Recommended hose length, bend, and offset (inches)

PipeSize

MinimumLength (X)

MinimumBend Radius

MaximumOffset

1⁄4 8 5.5 2.0

3⁄8 10 5.5 2.0

1⁄2 10 6.0 1.5

3⁄4 12 8.0 1.0

1 15 9.0 1.5

11⁄4 18 10 2.0

11⁄2 18 12 2.0

2 21 15 2.0

21⁄2 22 14 2.5

3 24 17 2.5

4 28 22 3.0

5 30 28 2.5

6 33 33 2.5

Threaded both ends

Threaded one end, lap flange other end

Fixed flange one end, lap flange other end

X

X

X

Compound hose(recommended)

Minimum bend radiusis limited by hosesize and material.

Offset

21

ConnectorsKadant Johnson rotary unions are attached to roll journals using threaded, flanged, or quick-release nipples.

Straight threads

Quick-release flangemounted to journal

Integral flange

Tapered threads Tapered threads withadapter flange

Threaded supply pipeA threaded supply pipe is used for dual flow installations and is connected to the rotaryunion elbow using NPT threads. See page 19 for the NPT take-up dimension. The size ofthe supply pipe determines the flow rate for a particular union size. The larger the pipesize, the higher the potential flow rate for a given size union. To avoid excessive stressat the pipe thread, the supply pipe length should not be longer than 4x the overalllength of the rotary union.

Fixed tube supply pipeThe fixed tube supply pipe is made of stainless steel tubing and is silver-soldered intothe elbow of the rotary union. The lighter weight and thinner wall sections allow forhigher flow rates and higher rotational speeds compared to alternative supply pipedesigns. To avoid excessive stress at the tube-elbow interface, the supply pipe lengthshould not be longer than 6x the overall length of the rotary union.

Rotating supply pipeA rotating supply pipe can be produced from tubing or iron pipe. The end of the pipethat is inserted into the rotary union elbow is machined to a specific tolerance toprovide the proper fit and performance. It is recommended that the rotating supplypipe be supported inside the roll when attempting to use a supply pipe longer than 4xthe length of the union. A straight thread rotor (for example, BSP or UNS) is used toensure concentricity.

Other Rotary Unions

22

At Kadant Johnson, our world revolves around designing and manufacturingrotary joints and precision unions to meet our customers’ needs. Based on more than 75 years of innovation, we produce thousands of different rotaryunion configurations for a variety of process industries. Our full line ofstandard rotating unions is used in a wide variety of applications includingsteam, water, thermal oil, coolant, hydraulic oil, air, and other media. If you donot see what you need, our rapid design product development group is readyto provide a custom design based on your specific application needs.

Type SX for steam and thermal oil (3⁄4" to 3")

Type ELS for steam and thermal oil (2" to 12")

The ELS rotary joint is designed for use with steam and thermal oil service. Thedouble-guide design provides internal support for the joint and maintainsalignment even when the roll or cylinder is not concentric. The ELS is availablein sizes ranging from 2" to 12" and is rated up to 650°F (343°C), 300 psig (20 bar), and 200 RPM.

The SX rotary joint is designed for steam and thermal oil applications with a stationary supply pipe. Its two internal carbon-graphite bearings permit self-alignment and long operating life – even on cylinders that are notconcentric. The convex seal ring and optimized seal diameter provide extended seal life and reduced maintenance for the SX joint. The SX rotaryjoint line is available in sizes from 3⁄4" to 3" and can be used in single or dual flow applications. The joint is rated up to 650°F (343°C), 300 psig (20 bar), and 550 RPM.

23

Type G for coolant, water, air, and hydraulic oil

The G rotary union is a high performance, high precision union for coolant,water, air, and hydraulic oil applications. Type G unions are generally applied to spindles, gun drills, milling, and other machinery. The G union is designed for smooth-running at speeds up to 50,000 RPM and pressures up to 3,600 psig (250 bar) in sizes ranging from 1⁄4" (M10) to 5⁄8" (M16).

Type MP for pneumatic, hydraulic, and water applications

The MP rotary union is a custom-designed multi-passage union for pneumatic,hydraulic, and water applications. The precision ball bearings are lubricated forlife and housing materials include stainless steel, aluminum, steel, or brass.Standard passage sizes are 1⁄8", 1⁄4", 3⁄8", 1⁄2", 3⁄4", and 1" with other sizesavailable. MP unions are available with up to 12 passages and rated up to 225°F(107°C), 3,000 psig (207 bar), and 500 RPM.

Type OTS for water cooling

The Over-The-Shaft (OTS) rotary union is applied to various types of driven rollsthat require cooling through the driven side of the roll. The OTS is made ofstainless steel and bronze components and features a Quad-Seal o-ring design for reliable sealing performance. For high-speed applications, a mechanical seal design is available. The OTS rotary union is rated up to 200°F (93°C) and150 psig (10 bar).

Many suppliers have made a commitment to the international marketplace. But few have taken that commitment asfar as Kadant Johnson. To assure product availability wherever it's needed, Kadant Johnson joints, syphons, and relatedequipment are manufactured in Asia, Europe, North America, and South America.

Because knowledgeable advice and prompt service are as important as the products, Kadant Johnson has factory-authorized representatives in nearly 150 countries. So no matter where you are, Kadant Johnson products, service, andassistance are nearby.

Local Assistance On A Worldwide Basis

805 Wood StreetThree Rivers, MI 49093 USAtel: +1 269 278 1715fax: +1 269 279 5980

Wuxi National Hi-Tech Industrial Development ZoneWuxi City, Jiangsu Province, Chinatel: +86 510 85212218fax: +86 510 85212038

Via Anhanguera, km 83,5 - CP 351/35313278-530, Valinhos, SP, Brasiltel: +55 19 3849 8700fax: +55 19 3871 00933

Nijverheidslaan 23-251380 AB Weesp, The Netherlandstel: +31 294 494200fax: +31 294 431359

MANUFACTURING LOCATIONS

Kadant is a global supplier of high-value, critical components andengineered systems used in processindustries worldwide.

www.kadant.com

Contact us:

KADANT JOHNSON INC.805 Wood StreetThree Rivers, MI 49093 USA

Tel: +1-269-278-1715Fax: +1-269-279-5980Email: [email protected]

RX Rotary Union-3007 (US) 05/2014

Replaces: RX-3006a

©2014 Kadant Inc.

rx rotary union - media.kadant.com · 3 - bsp rh 12k51350 74 200 327 45* 397 29 kg 3" - bsp lh...

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