Abstract: An air motor assembly includes an exhaust block with an exhaust port that conveys exhaust air into an exhaust manifold. The exhaust port includes an expansion chamber that creates a pressure drop in the exhaust gas, thereby decreasing the temperature of the exhaust gas. The expansion chamber is defined between a first wall that is tangential to the air motor cylinder and a second wall that is transverse to an axis of the exhaust port. Poppet valves control actuation of a shuttle. The poppet valves are disposed on the exterior of the air motor assembly and are thermally insulated from the air motor assembly.

Abstract: An air motor assembly includes an exhaust block with an exhaust port that conveys exhaust air into an exhaust manifold. The exhaust port includes an expansion chamber that creates a pressure drop in the exhaust gas, thereby decreasing the temperature of the exhaust gas. The expansion chamber is defined between a first wall that is tangential to the air motor cylinder and a second wall that is transverse to an axis of the exhaust port. Poppet valves control actuation of a shuttle. The poppet valves are disposed on the exterior of the air motor assembly and are thermally insulated from the air motor assembly.

Abstract: An air motor assembly includes an exhaust block with an exhaust port that conveys exhaust air into an exhaust manifold. The exhaust port includes an expansion chamber that creates a pressure drop in the exhaust gas, thereby decreasing the temperature of the exhaust gas. The expansion chamber is defined between a first wall that is tangential to the air motor cylinder and a second wall that is transverse to an axis of the exhaust port. Poppet valves control actuation of a shuttle. The poppet valves are disposed on the exterior of the air motor assembly and are thermally insulated from the air motor assembly.

Abstract: A plural component dispensing system includes at least one compressed gas pneumatically connected to supply pressurized gas to each of a first pressure vessel that discharges a first fluid component and a second pressure vessel that discharges a second fluid component. Each of the first fluid component and the second fluid component is supplied from the respective pressure vessel through individual flow meters to a device. A first pressure regulator is pneumatically connected between the first pressure vessel and the at least one compressed gas source to regulate pressure of the first pressure vessel. A controller receives sensed first and second volumetric flow rates from the individual flow meters and controls the first pressure regulator based on the sensed volumetric flow rates to produce a target ratio of the first fluid component and the second fluid component at the device.

Abstract: First and second fluid components are individually pumped to a device from first and second pumps. A first volumetric flow rate of the first fluid component discharged from the first fluid component is measured. A second volumetric flow rate of the second fluid component discharged from the second pump is measured. Operation of at least one of the first and second pumps is controlled based on the measured first volumetric flow rate and the measured second volumetric flow rate to produce a target ratio of the first fluid component and the second fluid component at the device.

Abstract: A plural component dispensing system includes at least one compressed gas pneumatically connected to supply pressurized gas to each of a first pressure vessel that discharges a first fluid component and a second pressure vessel that discharges a second fluid component. Each of the first fluid component and the second fluid component is supplied from the respective pressure vessel through individual flow meters to a device. A first pressure regulator is pneumatically connected between the first pressure vessel and the at least one compressed gas source to regulate pressure of the first pressure vessel. A controller receives sensed first and second volumetric flow rates from the individual flow meters and controls the first pressure regulator based on the sensed volumetric flow rates to produce a target ratio of the first fluid component and the second fluid component at the device.

Abstract: A temperature control unit includes a fitting, a heating wire, a first temperature sensor, and a housing, which contains the first temperature sensor and portions of the fitting and the heating wire. The fitting includes a fluid inlet, a fluid outlet, a flow channel extending from the fluid inlet to the fluid outlet, and a passage extending through a wall of the fitting to the flow channel. The heating wire extends through the passage and into the flow channel. The first temperature sensor is secured to an external surface of the fitting opposite the flow channel and is electrically connected to the heating wire.

Abstract: The disclosure addresses a relief valve suitable for use in systems for delivering relatively viscous fluids. The described relief valve includes a housing and a valve mechanism moveable relative to an opening into the housing to allow or prevent flow from a flow path adjacent the relief valve into and through the housing. The relief valve is configured to minimize, and in many examples, essentially eliminate, a cavity between the housing opening and the adjacent flow path. Elimination of this cavity offers significant advantages as it minimizes or eliminates a location for pumped materials to accumulate and/or cure, which can lead to impairment or disabling of the relief valve operation.

Abstract: A fluid heater system for a pumping system comprises a core, a heating element and a sleeve. The core comprises a body made of thermally conductive material, and a plurality of channels formed on an outer periphery of the body. The heating element is disposed within the core. The sleeve surrounds the core adjacent the plurality of channels. The sleeve is formed of a material having a higher strength than the thermally conductive material of the core. In another embodiment, the plurality of channels is chamfered to form a portion of a common outlet plenum and the core includes a temperature sensor bore located proximate the common outlet plenum.

Abstract: A dual pump fluid proportioner having an adjustable motor position comprises a mounting plate, first and second positive displacement pumps, first and second tie rods, a pump yoke and a motor. The first and second tie rods fixedly connect the first and second pumps to the mounting plate. The first and second pumps each have a pump shaft. The pump yoke slidably couples to the first and second tie rods and the pump shafts. The motor adjustably couples to the mounting plate and includes a drive shaft. The drive shaft extends from the motor, through the mounting plate to adjustably couple to the yoke.

Abstract: A fluid circulation valve assembly comprises a valve body and first and second pressure relief valves. The valve body comprises two inlets to receive output of fluid pumps, two outlets to direct fluid from the two inlets out of the valve body, respectively, and two overpressure outlets to direct fluid from the twos out of the valve body, respectively. The first and second pressure relief valves intersect the two inlets, the two outlets and the two overpressure outlets, respectively. Each pressure relief valve comprises a spring operated overpressure valve configured to open an inlet to an overpressure outlet at an overpressure condition; and a manually operated valve having a first position configured to fluidly connect an inlet to an outlet while not affecting operation of the overpressure valve, and a second position configured to fluidly connect an inlet to an overpressure outlet while opening the overpressure valve.

Abstract: The controller of the plural component proportioner (10) dispenses both components (or all three if a three component material) as necessary to maintain the correct mix ratio. The fluid displacement measuring technique described allows this proportioning to take place with the “A” or main component pump always able to supply fluid to the spray gun without being stopped. The “B” component, at a higher pressure, is added as necessary to control ratio. The control can determine whether the pumps were properly loaded with fluid, and the fluid was properly compressed for accurate measurement. This technique allows for the proportioned fluids to be provided to the spray gun(s) at high flow rates and consistent spray pressure without interruption.

Abstract: The proportioner (10) has a variable speed controlled DC motor (12) having a gearbox (14) and crankshaft (16) at either end which are connected to reciprocating piston pumps (18). The outputs (18a) of the two pumps (18) are fed to a manifold (22) where the pressure of each output is measured. The user sets a setpoint pressure (e.g. 1000 psi) and the controller (26) then compares the pressures of the two components and controls the higher of the two relative to the setpoint. Ratio assurance is monitored by continuing to look at both output pressures. If one side falls below a predetermined percentage of the setpoint (50% in the preferred embodiment), an alarm may be raised or operation stopped.

Abstract: A fluid circulation valve assembly comprises a valve body and first and second pressure relief valves. The valve body comprises two inlets to receive output of fluid pumps, two outlets to direct fluid from the two inlets out of the valve body, respectively, and two overpressure outlets to direct fluid from the twos out of the valve body, respectively. The first and second pressure relief valves intersect the two inlets, the two outlets and the two overpressure outlets, respectively. Each pressure relief valve comprises a spring operated overpressure valve configured to open an inlet to an overpressure outlet at an overpressure condition; and a manually operated valve having a first position configured to fluidly connect an inlet to an outlet while not affecting operation of the overpressure valve, and a second position configured to fluidly connect an inlet to an overpressure outlet while opening the overpressure valve.

Abstract: A dual pump fluid proportioner having an adjustable motor position comprises a mounting plate, first and second positive displacement pumps, first and second tie rods, a pump yoke and a motor. The first and second tie rods fixedly connect the first and second pumps to the mounting plate. The first and second pumps each have a pump shaft. The pump yoke slidably couples to the first and second tie rods and the pump shafts. The motor adjustably couples to the mounting plate and includes a drive shaft. The drive shaft extends from the motor, through the mounting plate to adjustably couple to the yoke.

Abstract: The controller of the plural component proportioner (10) dispenses both components (or all three if a three component material) as necessary to maintain the correct mix ratio. The fluid displacement measuring technique described allows this proportioning to take place with the “A” or main component pump always able to supply fluid to the spray gun without being stopped. The “B” component, at a higher pressure, is added as necessary to control ratio. The control can determine whether the pumps were properly loaded with fluid, and the fluid was properly compressed for accurate measurement. This technique allows for the proportioned fluids to be provided to the spray gun(s) at high flow rates and consistent spray pressure without interruption.