Linear PowerProbe (LPP40 Series)
Linear Only Motion
High performance magnetically-coupled linear devices, designed for sample transfer where only linear motion is required and rotation is undesirable.
Available in standard stroke lengths from 304mm to 1524mm with motorization options. The LPP is bakeable to 250°C without removing any components.
For demanding UHV applications, we recommend choosing the "XLPP" option with rolling metal & ceramic bearings for smooth, low friction actuation, with minimal outgassing.
Features
- Internal anti-rotation system ensures straight in-line motion
- No need for conventional external linear guide bars
- 10x the thrust of conventional probes
- Unrivalled axial coupling strength
- Exceptional axial stiffness
- Zero backlash under low load
The Linear PowerProbe should be selected where only linear motion is required and twisting or turning of the sample would be undesirable.
An anti-rotation system is fitted internally ensuring straight, in-line motion, despite any rotation of the external drive thimble. This removes the need for the unwieldy and bulky external linear guide bars used by other manufacturers and guarantees no rotation during the stroke.
Furthermore the external drive carriage has only a linear magnetic coupling (no rotary magnetic coupling) meaning no torque is applied to the shaft when rotating the thimble. Fewer parts also means that this linear only version of the PowerProbe is a lower cost than the rotary and linear versions.
A retracted switch option is available which provides indication when the probe is fully retracted. This signal can be interlocked to prevent, for example, the premature closing of a gate valve before the PowerProbe has fully retracted.
Charts
Specifications Table
| Model/Series | Linear PowerProbe (LPP40) |
| Mounting Flange Size | DN40 (2.75" OD) or DN63 (4.5" OD) CF Flange |
| Break-away Linear Force | 140 N (31.5 lbs) |
| Maximum Cantilevered Load | 20 Nm (177 in-lbs) |
| Available Stroke Range | 304mm (12") to 1524mm (60") as standard |
| Sample Weight/Load Capacity | Maximum recommended internal load carrying capacity will be a function of probe extension, but we recommend not exceeding a moment of 20 Nm (15 lbf ft). See Technical Data for deflection versus load graph |
| Maximum Recommended Internally Applied Load When Vertically Installed | This is a function of the load acceleration. In a static case the load may approach the coupling break-away force; however, it would be wise to apply a sensible safety factor |
| Bakeout | 250°C (motor removed) |
| Pressure Range | Atm to 5 x 10-11 mbar |
| Position Locking | Thumbscrew (manual only) |
| Retracted Switch Option | Manually actuated drives may be purchased with an added "retracted micro-switch" to digitally indicate when the unit is in the fully retracted position. When used in conjunction with a PLC or other type relay, this can aid in ensuring a gatevalve is not accidentally closed when the probe is in the inserted position |