PTX™ Rotary Joints (US Patent No. 5,098,135)
The PTX rotary joint and stationary syphon system incorporate the latest developments in seal design and drying technology for paper dryers. The lightweight design makes for easy installation; yet its heavy-duty construction handles high pressure, high speed, and angular misalignment. The PTX can also accommodate thermal expansion of the dryer journal – even when used on the front side of paper machines.
The patented PTX steam joint design uses a spring-loaded piston that applies balanced pressure on the seal ring to keep it securely seated against the wear plate. The wear plate is attached to the journal or a filler flange. The wear plate rotates while the piston remains stationary. The seal ring is free floating to accommodate angular and offset misalignment.
With its spring-loaded piston and reverse seal, the PTX seal technology is a far different design than conventional seal packages. These advanced design differences make the PTX a more reliable, easier-to-maintain joint - even under the most difficult operating conditions. The PTX is rated up to 400° F (205° C), 160 psig (11 bar), and 500 RPM (8,000 fpm).
Features
- Balanced seal
- Convex antimony seal ring
- Large flow area
- Rigid mounting
- Accommodates thermal expansion
- Lightweight design
Benefits
- Long running life
- Self-aligning seal
- Low pressure drop
- High speed reliability
- Applied to "floating" journals
- Easy installation
Type: 2000PT Specifications
 |
Fluid | Max. Pressure | Max. Temperature | Max. Speed |
|---|
| Water/Steam | 1.0MPa | 204°C | 500rpm |
Unit:mm
| Type | Size | M | A | E | G | J | N | O |
|---|
| 2300LAF | 1" | 1" | 32 | - | 119 | 161 | 149 - 241 | 20 |
|---|
| 2550LAF | 2" | 2" | 60 | 117 | 323 | 399 | 222 - 400 | 21 - 27 |
|---|
| 2700LAF | 3" | 3" | 86 | 152 | 445 | 535 | 235 - 267 | 27 - 33 |
|---|
| 2750LAF | 3 1/2" | 3 1/2" | 102 | 165 | 534 | 648 | 279 - 365 | 33 - 40 |
|---|
| 2800LAF | 4" | 4" | 102 | 165 | 518 | 633 | 308 - 356 | 33 - 40 |
|---|
| 1075LAF | 6 1/2" | 8" | 197 | 235 | 1,165 | 1,337 | 559 | 67 |
|---|
*Dimensions are subject to change without any advanced notice.
Type: 6000PT Specifications
 |
Fluid | Max. Pressure | Max. Temperature | Max. Speed |
|---|
| Water/Steam | 1.0MPa | 204°C | 500rpm |
Unit:mm
| Type | Size | M | A | D | E | G | H |
|---|
| 6550AF | 2" | 2" | 60 | 114 | 117 | 323 | 391 |
|---|
| 6700AF | 3" | 3" | 86 | 117 | 152 | 470 | 565 |
|---|
| 6750AF | 3 1/2" | 4" | 102 | 152 | 165 | 495 | 610 |
|---|
| 6800AF | 4" | 4" | 102 | 152 | 165 | 516 | 647 |
|---|
*Dimensions are subject to change without any advanced notice.
Type: 9000PTX Specifications
 |
Fluid | Max. Pressure | Max. Temperature | Max. Speed |
|---|
| Water/Steam | 1.1MPa | 243°C | 500rpm |
Unit:mm
| Type | Size | M | P | A | B | C | D | E | F |
|---|
| 9750 | 3 1/2" | 2 1/2" - 3" | 1 1/4" - 2" | 103 | 198 | 299 | 254 | 133 | 190 |
|---|
| 9800 | 4" | 3" - 4" | 1 1/2" - 2 1/2" | 133 | 230 | 353 | 284 | 146 | 216 |
|---|
*Dimensions are subject to change without any advanced notice.
