One Question per Day 20181225

①When continuing to operate clearly endangers the safety of equipment and personnel. ②The pump or motor experiences severe vibration, or metal colliding or grinding sounds can be clearly heard. ③Any bearing or shaft seal smoking, or a rapid increase in temperature exceeding the specified values. ④When measures taken are ineffective to prevent water from vaporizing inside the pump. ⑤The pump’s casing is broken. ⑥The motor switch is smoking or on fire. ⑦Motor failure.

1. Emergency system shutdown. 2. A process accident or equipment failure occurs.

The pump in operation must be stopped urgently if any of the following abnormalities occur: (1) An accident involving a person occurs during operation, or a part of the unit suddenly breaks. (2) When the pump body or bearings of a horizontal centrifugal pump overheat and exceed the maximum limit. (3) When the operating current or voltage of the motor suddenly increases or decreases beyond the maximum values, or when the equipment catches fire or the motor emits a burning smell, etc. (4) Vaporization heat generation inside the pump or severe vibration occurs. (5) Severe friction and knocking sounds inside the pump, or displacement exceeding 2-3 mm. (6) Failures such as ruptures of process pipelines and vessels associated with the operating horizontal centrifugal pump.

This post was last edited by maysee on 2018-12-25 at 13:23. ①When continuing to operate poses a clear threat to the safety of equipment and personnel. ②The pump or motor experiences severe vibration, or metal colliding or grinding sounds can be clearly heard. ③Any bearing or shaft seal smoking, or a sharp increase in temperature exceeding the specified values. ④When measures taken are ineffective to prevent water from vaporizing inside the pump. ⑤The pump’s casing is broken. ⑥The motor switch is smoking or on fire. ⑦Motor failure.

(1) After the motor is switched on, the rotor does not rotate or rotates at a speed lower than normal, along with abnormal noises； (2) After the motor is switched on, there is no indication of current or it does not return within the specified time ； (3) The motor is emitting sparks and smoke ； (4) When the rotating machinery produces obvious frictional and impact noises, or when there are damaged parts ； (5) The current suddenly increases and exceeds the rated value without returning to normal ； (6) In the event of a fire that endangers the equipment, or in case of an accident involving personnel during operation ； (7) When the motor is flooded ； (8) When the motor speed drops sharply, there is a humming sound, and the temperature keeps rising ； (9) When the temperature, vibration, or shaft runout of the motor or drive gear bearings experience sudden and excessive changes. Meeting any one of the above conditions will allow for immediate shutdown.

①When continuing to operate clearly endangers the safety of equipment and personnel. ②The pump or motor experiences severe vibration, or metal colliding or grinding sounds can be clearly heard. ③Any bearing or shaft seal smoking, or a rapid increase in temperature exceeding the specified values. ④When measures taken are ineffective to prevent water from vaporizing inside the pump. ⑤The pump’s casing is broken. ⑥The motor switch is smoking or on fire. ⑦Motor failure.

(1) An injury occurs during the operation of the equipment, or a part of the unit suddenly breaks. (2) When the pump body or bearings of a horizontal centrifugal pump overheat and exceed the maximum limit. (3) When the operating current or voltage of the motor suddenly increases or decreases beyond the maximum values, or when the equipment catches fire or the motor emits a burning smell, etc. (4) Vaporization heat generation inside the pump or severe vibration occurs. (5) Severe friction and knocking sounds inside the pump, or displacement exceeding 2-3 mm. (6) Failures such as ruptures of process pipelines and vessels associated with the operating horizontal centrifugal pump.

(1) There are obvious friction or collision noises inside the pump. (2) The bearing temperature rises sharply and exceeds the limit. (3) Cavitation occurs in the pump.

(1) After the motor is switched on, the rotor does not rotate or rotates at a speed lower than normal, along with abnormal noises； (2) After the motor is switched on, there is no indication of current or it does not return within the specified time ； (3) The motor is emitting sparks and smoke ； (4) When the rotating machinery produces obvious frictional and impact noises, or when there are damaged parts ； (5) The current suddenly increases and exceeds the rated value without returning to normal ； (6) In the event of a fire that endangers the equipment, or in case of an accident involving personnel during operation ； (7) When the motor is flooded ； (8) When the motor speed drops sharply, there is a humming sound, and the temperature keeps rising ； (9) When the temperature, vibration, or shaft runout of the motor or drive gear bearings experience sudden and excessive changes. Meeting any one of the above conditions will allow for immediate shutdown.

This post was last edited by maysee on 2018-12-25 at 13:23. ①When continuing to operate poses a clear threat to the safety of equipment and personnel. ②The pump or motor experiences severe vibration, or metal colliding or grinding sounds can be clearly heard. ③Any bearing or shaft seal smoking, or a sharp increase in temperature exceeding the specified values. ④When measures taken are ineffective to prevent water from vaporizing inside the pump. ⑤The pump’s casing is broken. ⑥The motor switch is smoking or on fire. ⑦Motor failure.