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Description
Gas and steam turbines can produce temperatures hot enough to damage or destroy conventional proximity probes. The 3300 High Temperature Proximity System(HTPS) is designed to withstand the extreme temperatures found inside gas turbines, steam turbines and other types of rotating machinery.The HTPS measures vibration, thrust position, differential expansion and other parameters inside the hot areas of these machines. High temperature installations include:

• Near a labyrinth seal in steam turbines
• Differential expansion in steam turbines
• When probe cables are routed through struts that support the bearing housing of a gas turbine
• When probe cables are routed out through the exhaust path of a gas turbine Monitoring a troublesome bearing in a high temperature area
• Mode shape analysis at the mid-span location on steam and gas turbines for online machinery diagnostics
• Interstage radial and axial seal clearance measurements at the mid-span location of multistage steam turbines to minimize seal rubs
• Most hot bearing locations that can destroy conventional proximity probes

High temperature transducer witha rugged design
The 3300 XL High Temperature Proximity Systemcan be used for proximity measurements at hot locations with excellent results. Customer benefits include:

• Proximity probe with integral hardline cable rated for +350°C(+662℉) continuous service inextreme conditions
• 4mm(160 mils) of linear range for most measurements in the hot sections of the machine
• Hermetically-sealed ceramic probe tip seals out moisture and contaminants for added durability
• Ceramic tip and stainless steel construction resists heat, moisture and corrosion
• Threaded and smooth case styles for various types of probe mounting
• Hardline cable available in lengths of 1, 2 and 5 metres for routing cable through hot sections of the machine
• 3.9V/mm (100 mv/mil) signal output compatible with virtually all new and existing Bently Nevada monitors and diagnostic equipment

Mode shape analysis
The 3300 XL High Temperature Proximity System is used to protect and manage critical machines in your facility for increased safety and efficiency. It is also used for mode shape analysis when measurements are taken at the turbine mid-span location. Mode shape analysis is important for research and development of a new steam or gas turbine design or when troubleshooting an existing design. Mode identification probes provide lateral mode shape information which is extremely valuable for balancing rotating machinery and identifying faults such as shaft cracks, bearing failures, rotor-to-stator rub sand other machine proplems.

For test and measurement applications, the HTPS will meet or exceed most requirements for making proximity measurements in high temperature envronments. It is a viable option for your most challenging test problems.

The Bently Nevada 3300 XL High Temperature Proximity System is an advanced transducer designed for making proxmity measurements at hot bearing locations in your machine. This transducer delivers dependable service insevere environments and is an ideal solution when using proximity probes at elevated temperatures.

Because of its thick hardline cable, the HTPS probe can be difficult to gap using a traditional threaded probe and bracket. Therefore, we recommend using smooth case probes, particularly if ordering a longer (2-metre or 5-metre) probe. The smooth case probes come with a clamp style mounting bracket to allow the probe to be gapped without turning.

Stock part list:

330301-000-016-10-90-01-00

330301-000-016-20-90-01-00

330302-000-050-10-90-01-00