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Obturator

Obturators or closing elements are the moving components inside valves which serve to mechanically ...

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Oil pump

Oil pumps transport oil through a piping system. Different types of pump may be used for this purpose ...

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Open impeller

Open impeller types are impellers designed without front (outer) shrouds (also see Impeller).

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Open-loop control

Open-loop control is a process that systematically targets variables in a controllable system which ...

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Operating behaviour

A centrifugal pump's operating behaviour is the collective term for all pump characteristics (e. g.

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Operating characteristics

The operating characteristics describe the characteristic features of a pump in operation (see also ...

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Operating conditions

The operating conditions of centrifugal pumps represent the requirements laid down by the ...

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Operating costs

Operating costs comprise the expenditure incurred by a company on an ongoing basis during operation ...

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Operating limit

The operating limits define the maximum range within which a centrifugal pump should be operated from ...

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Operating point

The operating point of a centrifugal pump is the intersection of the pump characteristic curve (H/Q ...

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Operation under overload conditions

Under overload or high flow conditions, the flow rate at the current operating point is considerably ...

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Outlet cross-section

The outlet cross-section of the system is an agreed cross-section in the discharge-side piping or in ...

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Outlet width

The outlet width (b2) of an impeller describes the open width at the outlet and is determined by the ...

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Overall efficiency

Overall efficiency is also referred to as the pump efficiency.

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Overload relay

An overload relay is another term for the motor protection relay.

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Over-pressure sensor

The over-pressure sensor is also referred to as the relative pressure sensor and is a measuring ...

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Overvoltage protection

Overvoltage protection protects electrical and electronic devices from excessively high voltage. This ...

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