Abstract: A liquid discharge system includes a liquid product pump having a sensor for monitoring vibrations passing through an outer casing of the liquid product pump to detect an occurrence of cavitation within the liquid product pump. A system and method for controlling the operation of a liquid product pump in an engine-driven hydraulic discharge system. The liquid product pump has a vibration sensor operable to detect cavitation within the liquid product pump and for providing an electrical vibration signal to a speed control module. The speed control module is operable to process the vibration signal and to produce an electrical speed control signal that is provided to an electronic actuator. The electronic actuator is operable to actuate a motor control lever of a variable speed hydraulic motor to adjust the operating speed of the liquid product pump.

Abstract: A liquid discharge system includes a liquid product pump having a sensor for monitoring vibrations passing through an outer casing of the liquid product pump to detect an occurrence of cavitation within the liquid product pump. A system and method for controlling the operation of a liquid product pump in an engine-driven hydraulic discharge system. The liquid product pump has a vibration sensor operable to detect cavitation within the liquid product pump and for providing an electrical vibration signal to a speed control module. The speed control module is operable to process the vibration signal and to produce an electrical speed control signal that is provided to an electronic actuator. The electronic actuator is operable to actuate a motor control lever of a variable speed hydraulic motor to adjust the operating speed of the liquid product pump.

Abstract: A system for loading fry bulk materials into a tank trailer includes a blower assembly mounted on a tank truck that is in pneumatic communication with the interior of a tank of the tank trailer through at least one conduit. The blower assembly includes a blower and a blower filter in pneumatic communication with the blower through a suction line. The blower assembly further includes a vacuum gauge for monitoring the vacuum pressure of the airflow between the blower filter and the blower and an optional check valve for passing the airflow from the ambient atmosphere in the event that the vacuum pressure of the airflow exceeds a predetermined maximum vacuum pressure for safe operation of the blower. The predetermined maximum vacuum pressure may be no more than about five inches of mercury vacuum pressure (5 in-Hg; 2.46 psi). An operating vacuum pressure of the blower may be between about seventeen inches of mercury (17 in-Hg; 8.35 psi) and about five inches of mercury (5 in-Hg; 2.46 psi).

Abstract: A hydraulic oil cooler is provided with steps for allowing a person to access a rear portion of a tank truck. The hydraulic oil cooler includes a housing having a first side, a second side opposite the first side, and a front side extending between the first side and the second side. The housing is configured for attachment to a frame rail of the tank truck. The hydraulic oil cooler further includes at least a bottom step and an intermediate step disposed on the housing with the bottom step and the intermediate step extending outwardly from the front side of the housing. The width of the bottom step and the intermediate step is between about 254 millimeters (10 inches) and about 609.6 millimeters (24 inches). The steps are made of a slip-resistant and self-cleaning material and have a predetermined surface pattern for increasing the amount of gripping and traction of the steps.

Abstract: A hydraulic oil cooler is provided with steps for allowing a person to access a rear portion of a tank truck. The hydraulic oil cooler includes a housing having a first side, a second side opposite the first side, and a front side extending between the first side and the second side. The housing is configured for attachment to a frame rail of the tank truck. The hydraulic oil cooler further includes at least a bottom step and an intermediate step disposed on the housing with the bottom step and the intermediate step extending outwardly from the front side of the housing. The width of the bottom step and the intermediate step is between about 254 millimeters (10 inches) and about 609.6 millimeters (24 inches). The steps are made of a slip-resistant and self-cleaning material and have a predetermined surface pattern for increasing the amount of gripping and traction of the steps.

Abstract: A system for loading fry bulk materials into a tank trailer includes a blower assembly mounted on a tank truck that is in pneumatic communication with the interior of a tank of the tank trailer through at least one conduit. The blower assembly includes a blower and a blower filter in pneumatic communication with the blower through a suction line. The blower assembly further includes a vacuum gauge for monitoring the vacuum pressure of the airflow between the blower filter and the blower and an optional check valve for passing the airflow from the ambient atmosphere in the event that the vacuum pressure of the airflow exceeds a predetermined maximum vacuum pressure for safe operation of the blower. The predetermined maximum vacuum pressure may be no more than about five inches of mercury vacuum pressure (5 in-Hg; 2.46 psi). An operating vacuum pressure of the blower may be between about seventeen inches of mercury (17 in-Hg; 8.35 psi) and about five inches of mercury (5 in-Hg; 2.46 psi).

Abstract: A hydraulic system for off-loading liquids from a tank trailer includes a liquid pump and a compressor disposed within a housing. The liquid pump and the compressor are operated by hydraulic motors driven by an external hydraulic pump operatively coupled to a power take-off from a tractor. The hydraulic motors are in fluid communication with the hydraulic pump and with a hydraulic oil cooler that is likewise disposed within the housing. An actuator handle on a selection and/or direction valve permits an operator to select the liquid pump to off-load liquids that will not cause damage to the liquid pump by pumping the liquid from the tank trailer via a first liquid conduit through the liquid pump and via a second liquid conduit into a storage container.

Abstract: A protection valve for a hydraulic drive system and a method for protecting the hydraulic drive system and pumping equipment driven by the hydraulic drive system includes a valve body, an actuator shaft movably disposed within the valve body, a thermal actuator for displacing the actuator shaft between an un-actuated position and an actuated position, and a poppet attached to the actuator shaft for movement therewith. The thermal actuator is configured to displace the actuator shaft between the un-actuated position and the actuated position in response to a hydraulic oil temperature that exceeds a predetermined maximum. A thermal actuator body is rigidly attached to the valve body at one end and a valve seat body is rigidly attached to the valve body at the other end. The thermal actuator body has openings formed therein for placing hydraulic oil in fluid communication with the thermal actuator.

Abstract: A protection valve for a hydraulic drive system and a method for protecting the hydraulic drive system and pumping equipment driven by the hydraulic drive system includes a valve body, an actuator shaft movably disposed within the valve body, a thermal actuator for displacing the actuator shaft between an un-actuated position and an actuated position, and a poppet attached to the actuator shaft for movement therewith. The thermal actuator is configured to displace the actuator shaft between the un-actuated position and the actuated position in response to a hydraulic oil temperature that exceeds a predetermined maximum. A thermal actuator body is rigidly attached to the valve body at one end and a valve seat body is rigidly attached to the valve body at the other end. The thermal actuator body has openings formed therein for placing hydraulic oil in fluid communication with the thermal actuator.