It is provided a portable tester for leakage rate of a cylinder of an automobile engine. The portable tester includes a shell; wherein a circuit board and a manifold body are provided in the shell; a throttle hole is provided inside the manifold body, the shell includes a front shell and a rear shell; a display and a control key are provided respectively at an upper end of and at a middle part of the front shell; the circuit board is provided with a decoding drive electrically connected with the display, and a single chip microcomputer unit is provided on the decoding drive and electrically connected with the control key; an air inlet connecter and an air outlet connector are provided at the lower end of the front shell. Two ends of the manifold body are provided with sensors electrically connected with the single chip microcomputer unit.

Methods and apparatus for detecting a vacuum leak within a processing chamber are described herein. More specifically, the methods and apparatus relate to the utilization of a spectral measurement device, such as a spectral gauge, to determine the leak rate within a process chamber while the process chamber is held at a leak test pressure. The spectral measurement device determines the rate of increase of one or more gases within the processing chamber and can be used to determine if the processing chamber passes or fails the leak test.

Methods and apparatus for detecting a vacuum leak within a processing chamber are described herein. More specifically, the methods and apparatus relate to the utilization of a spectral measurement device, such as a spectral gauge, to determine the leak rate within a process chamber while the process chamber is held at a leak test pressure. The spectral measurement device determines the rate of increase of one or more gases within the processing chamber and can be used to determine if the processing chamber passes or fails the leak test.

A self-orienting sensing system for a heating, ventilation, and air conditioning (HVAC) system includes a housing having a main body. The housing defines a sensing aperture in a first portion of the main body and a mounting channel in a second portion of the main body. The self-orienting sensing system includes a sensing element retained within the housing. The sensing element is configured to detect leaked refrigerant that enters the housing via the sensing aperture. The self-orienting sensing system also includes a mounting retainer configured to extend through the mounting channel and couple the housing to an interior surface of an air handling enclosure of the HVAC system. The mounting retainer enables the mounting channel to rotate about the mounting retainer to automatically align the sensing aperture in a target sensing orientation based on a weight of the housing under the force of gravity.

A self-orienting sensing system for a heating, ventilation, and air conditioning (HVAC) system includes a housing having a main body. The housing defines a sensing aperture in a first portion of the main body and a mounting channel in a second portion of the main body. The self-orienting sensing system includes a sensing element retained within the housing. The sensing element is configured to detect leaked refrigerant that enters the housing via the sensing aperture. The self-orienting sensing system also includes a mounting retainer configured to extend through the mounting channel and couple the housing to an interior surface of an air handling enclosure of the HVAC system. The mounting retainer enables the mounting channel to rotate about the mounting retainer to automatically align the sensing aperture in a target sensing orientation based on a weight of the housing under the force of gravity.

A coolant management unit includes a server supply manifold, a server return manifold, a power distribution, and a controller. A server supply manifold is to receive cooling fluid from a cooling fluid source. The server supply manifold is to distribute the cooling fluid to server blades. The server return manifold is to receive vapor from the one or more server blades. The cooling fluid is two-phase cooling fluid to extract heat from one or more servers and to evaporate into the vapor into the server return manifold, and the vapor is transmitted to an external condenser via the rack return manifold to be condensed back to a liquid form. A power distribution bus is configured to distribute power to the one or more servers. A controller is configured to control a fluid pump coupled to the server supply manifold based on one or more signals received from different sensors.

A test apparatus and method for use, in situ, to identify leaks in individual tubes in an air-cooled heat exchanger includes a pressurizing component and a pressure retaining component that are secured in the opposite ends of an individual tube by engagement of a lock member in the threaded opening in the respective adjacent headers from which the access port covers have been removed. A pressurized test liquid, e.g., water, is admitted via the test apparatus pressurizing component to fill the tube by initially venting and then closing a drain valve on the pressure retaining component and controllably increasing the hydrostatic pressure on the tube to a predetermined value and monitoring a gauge in the pressurizing component for any loss of the final test pressure, thereby confirming a leak, after which the tube is drained and sealed to remove it from service.

A process for aging gas lift valves utilizing a controlled decompression to prevent damage to seals of the gas lift valves. The process includes pressuring one or more gas lift valves to a predetermined pressure (e.g., 5000 psig) and maintaining this pressure for a predetermined time (e.g. five minutes). After this time period, decompression is performed in discrete steps. For instance, the pressure of the pressure vessel may be reduced in predetermined pressure increments (i.e. reductions). After each pressure reduction, the reduced pressure is maintained for a predetermined time. This allows gasses and fluids within the elastomeric O-rings time to dissipate without causing damage to the seals.

A process for aging gas lift valves utilizing a controlled decompression to prevent damage to seals of the gas lift valves. The process includes pressuring one or more gas lift valves to a predetermined pressure (e.g., 5000 psig) and maintaining this pressure for a predetermined time (e.g. five minutes). After this time period, decompression is performed in discrete steps. For instance, the pressure of the pressure vessel may be reduced in predetermined pressure increments (i.e. reductions). After each pressure reduction, the reduced pressure is maintained for a predetermined time. This allows gasses and fluids within the elastomeric O-rings time to dissipate without causing damage to the seals.

A pipeline has a fitting with a wedge-shaped plug pressed into a wedge-shaped fitting recess by a retaining ring to block flow through the fitting for pressure testing. The plug has an extractor plate fastened to the plug through a center of the retaining ring so the retaining ring can rotate relative to the plug and extractor plate. But the extractor plate is a predetermined maximum distance from the plug and is larger than the center opening of the retaining ring to captivate the retaining ring between the plug and extractor plate. That limits the retaining ring motion along the port's axis. Threading engagement between the retaining ring and port allow the retaining ring to push the plug into the fitting in a first rotation direction while rotation in the opposite direction allows the retaining ring to push the extractor plate and the connected plug out of the fitting.