A tanker vehicle for distributing liquid on a surface includes a chassis that supports a tank for holding the liquid. A fluid pump discharges the liquid from the tank and is driven by a hydraulic motor. A hydraulic system delivers hydraulic fluid to the motor through a supply line and returns the fluid to a tank through a return line. A bypass circuit is disposed between the supply line and the return line, bypassing the motor. The bypass circuit includes a system for providing a combination soft start and soft stop of the hydraulic motor that is configured to enable hydraulic fluid to flow from the supply line through the bypass circuit to the return line at a start of the hydraulic system and to flow from the return line through the bypass circuit to the supply line at a shutdown of the hydraulic system.

Provided is a compressed natural gas (CNG) fuel system that can include a frame and at least one container. The frame can include a first side and a second side, with each side being configured to partly define a portion of an interior space. The at least one container can be configured to house or contain CNG and can be engaged to and partly encased by the frame. The at least one container can be partly located within the interior space of at least one of the first side or the second side. The frame assembly can be engaged to a chassis of a vehicle such that the at least one container is located either at least partially underneath a cab of the vehicle or at least partially behind a cab of the vehicle.

A sensor for measuring a level of a liquid such as fuel and/or water in a tank such as a fuel tank. The sensor includes a stack of capacitors, each capacitor with one or more graphene measurement electrodes and one or more graphene reference electrodes. A measurement system is arranged to measure a capacitance of each capacitor between its measurement electrode(s) and its reference electrode(s) and thereby infer the liquid level. The graphene measurement and reference electrodes are formed in a single layer of graphene oxide by reductive etching.

Aspects of a flow balanced frac tank farm are described herein. In one embodiment, the flow balanced frac tank farm includes at least one battery of frac tanks comprising a plurality of frac tank trailers, a header pipe arrangement, and at least one valve between one or more of the frac tank trailers and the header system. The header pipe arrangement may include a header supply pipe to supply water to individual ones of the plurality of frac tank trailers and a header discharge pipe to discharge water from individual ones of the plurality of frac tank trailers. The header pipe arrangement may be relied upon to help balance the flow of heated fluids among the frac tank trailers in frac tank farm.

A mobile water/fluid collection, recirculation management apparatus and system for the promotion of best and safest practices by firefighting engineers, candidates fire departments, agencies, colleges and academies as well as for the NFPA (National Fire Protection Agency) recommended annual testing of other apparatuses, pumps, and appliances, which allows for engineers and candidates to train and practice their requisite evolutions and drills using full-flow water/fluids at full and various pressures including, but not limited to, drafting, flowing hand lines, deck guns, ground monitors, aerials and ladder pipes, nozzles and appliances while returning the water/fluid to the apparatus via direct and indirect connections. All returning water/fluids encounter the diffuser screen that is internal and integral to the unit and/or via the roof receiver/diffuser. Included is a removable, portable training fire hydrant which allows for the engineers and candidates to get real world driver training including spotting the hydrant and the race for water training elements, requiring the engineer/candidate to stop in the right spot, hook up the correct hoses from their engine to the hydrant directly to the invention apparatus, to pump and flow water safely, accurately and efficiently, and, once filled with the requisite water/fluid, it is ready for continuous recirculation, training or testing evolutions without overheating the water/fluid, because it is continuously cooled passively with the diffusers in an open loop design.

An external actuator for manually operating a gate valve is described. The actuator includes a support plate, a linear sleeve, a shaft slidably arranged in the linear sleeve, a lever member, and a lever link. One end of the shaft is linked to a gate valve by way of a stem link, and a spring-loaded cam is provided on the support plate to releasably lock the shaft in a closed position.

Provided is a compressed natural gas (CNG) fuel system that can include a frame and at least one container. The frame can include a first side and a second side, with each side being configured to partly define a portion of an interior space. The at least one container can be configured to house or contain CNG and can be engaged to and partly encased by the frame. The at least one container can be partly located within the interior space of at least one of the first side or the second side. The frame assembly can be engaged to a chassis of a vehicle such that the at least one container is located either at least partially underneath a cab of the vehicle or at least partially behind a cab of the vehicle.

A RV winterizing method that introduces antifreeze to a RV system using a reverse flow procedure by using fittings or a coupling, where the coupling includes a band composed from a strip with a set of ends which over lap when the strip wraps around itself, a knob situated above the set of ends at a top portion of the band, wherein the knob adjust the band. A semi-tubular fitting is braced within the band where the semi-tubular fitting includes a set of lips extending up an inner wall of the band. A hole arranged at a central bottom portion of the semi-tubular fitting. Finally, a fitting continuing from the hole wherein the band attaches to a faucet to create a watertight seal, and enables a non-toxic antifreeze to flow through the fitting, into the faucet and into a plumbing system.

A thermally optimised circulation fluid system is proposed which comprises a circulation line, a circulation pump unit and a control unit. The circulation pump unit and the circulation line together form a circulation circuit. The circulation pump unit is configured for transferring an amount of thermal energy directly or indirectly to a fluid located in the circulation line. The control unit is configured for adjusting the amount of thermal energy which is transferrable to the fluid.

An air supply system for a whole vehicle, which is intended to solve the technical problem that it is hard to provide a multi-position and controllable air supply solution for an electric vehicle. A first air source device, a control valve and a pipeline constitute a first-type air supply system, the first-type air supply system has multiple air passages, each air passage is respectively provided with an air supply port, and a controller can switch operating states of the control valve, control the opening or closing of the multiple air passages, and achieve controllable air supply effects in multiple positions. A second air source device and several pipelines constitute a second type of air supply system, the second type of air supply system has multiple air passages, each air passage is respectively provided with an air supply port, and a controller can switch operating states of the second air source device, control the opening or closing of the multiple air passages, and achieve controllable air supply effects. The first type of air supply system and the second type of air supply system are rationally configured on the electric vehicle, so as to achieve multi-position and controllable air supply effects.