Thermostatic valve designed for compressor lubricating oil

January 2004

The AMOT Filterstat valve offers cost savings and performance benefits for screw compressor manufacturers by incorporating the features of a direct filter connection on the thermostatic valve for the lubricating oil system, as well as an optional integral differential pressure switch that indicates when the filter needs replacing.

Suitable for mixing or diverting applications, the valve is compact in size and designed to reduce cost by eliminating piping connections, and providing improved performance through having less potential leakage paths. It is ideal for compressor oil cooling systems in all environments.

Units have an aluminium body and Viton seals. Specifications include a flow rate of 2 to 8m3/hr with maximum 25 bar working pressure and control temperatures from 49 to 113°C.

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Temperature valves meet safety requirement for French trains

March 2003

AMOT temperature control valves have been chosen by a leading rail equipment manufacturer for fitting to a series of SNCF trains in France in the first phase of a project with an option for further locomotives, which could bring the total to 2000 valves.

Key feature in the specification was the manual override designed into AMOT ‘B’ internally sensed temperature valves, allowing manual operation and meeting the requirement for manual valve operation without any tools in the event of complication.

Also quoted as offering a more economic solution for controlling high and low temperature circuits on MAN diesel engines, the valves used are of 50mm and 80mm nominal bore.

Self-contained with no need for external power source, the self-sensing temperature control is accomplished by expansion of a wax/copper mixture with positive proportional valve action. A leak-tight design eliminates external moving parts and external dynamic seals. Another feature was replaceable seats and sleeves.

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Temperature control valves need no external power

December 2002

AMOT internally sensed temperature control valves are completely self-actuating and require no external power source. They are ideally suited for use within the railway industry on large single engine locomotives and also multiple engine DMU's (Diesel Multiple Units) in applications such as lubricating oil, jacket water (high temperature) circuits, and charge air (low temperature) circuits.

Automatic self-sensing control is achieved by the expansion of a wax/copper mixture with positive proportional valve action. A robust construction is combined with very low friction characteristics plus vibration and shock resistance to ensure a long and reliable service life. Seats and sleeves are replaceable.

Temperature setting is tamperproof and the easily installed valves operate in any mounting position, with a leak-tight design that eliminates external moving parts and external dynamic seals.

Three-way valve action ensures constant volume flow in the system and gives no restriction during the warm-up cycle to ensure maximum performance. These valves exhibit good over-temperature and over-pressure characteristics.

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