Abstract: A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff sensor. The feed timer supplies water to the boiler only if the low water cutoff sensor continues to indicate a low water level for a delay period of time measured by a delay timer. A resettable display indicates the quantity of water supplied by the water feeder to the boiler based on a feed counter incremented during water feeding. A manual feed button allows water to be manually fed to the boiler. The quantity of water manually supplied to the boiler is also shown on the display. The feed timer and delay timer are preferably implemented in software in a microcontroller in the water feeder controller. A lockout loop in the software prevents overfeeding of water to the boiler in the event of a failure of the low water cutoff sensor.

Abstract: A compact ball tap with 1 a water level switch which comprises a guide standpipe 5 vertically arranged in a tank T, a float 6 slidably installed on the guide standpipe 5, a valve 3, a lever 4 controlling an open-close action of the valve 3 connected with the float 6, and a water level switch 29 transmitting predetermined control signals when the float 6 shifts to a predetermined water level, wherein one float 6 is shared by the ball tap 1 and the water level switch 29.

Abstract: A flood prevention system includes a double-latching solenoid valve that shuts off a water supply line in response to a moisture sensor detecting a leak in a plumbing system. The double-latching feature provides the solenoid's plunger with two positions of equilibrium. This minimizes electrical power consumption so that the flood prevention system can be battery operated. To minimize a buildup of hard water deposits, the valve includes a flexible diaphragm and is cycled periodically regardless of whether flooding occurs. The sensor includes multiple methods of mounting to a floor.

Abstract: A pump mounted in a housing is fluidically coupled to a vehicle windshield washer fluid reservoir. At least one outlet is carried on the pump housing for discharging fluid pumped from the reservoir. A fluid level sensor is mounted in the housing and has a sensing end projecting into the reservoir. The sensor includes a pair of spaced sensors having the sensing ends exposed to fluid within the reservoir. The sensor has a labyrinth shape adjacent to the sensing ends.

Abstract: A toilet control system includes a sensor mounted on a bowl of a toilet near a top rim of the bowl and which is connected to a control valve unit which is fluidically interposed between a water supply tank and the bowl of the toilet. The control valve unit is normally open to permit flow of water from the water supply tank to the bowl, but is closed when water is sensed near the rim of the bowl to prevent further flow of water to the bowl from the water supply tank.

Abstract: During the deposition of a catalytic component on a carrier, the position of the liquid level of a slurry containing the catalytic component is controlled with high accuracy and the adhesion of the slurry to the lateral face of the carrier is prevented. In the deposition of the liquid substance on the carrier by the introduction of the liquid substance into the carrier from the bottom face thereof, the liquid level near the top face of the carrier is detected by an image-processing sensor.

Abstract: A modular well for a wastewater lift station includes multiple well sections. Each of the well sections has at least one mating feature allowing it to be joined to at least one other well section and to form a liquid tight seal. The well is formed by vertically mating the well sections together. One of the well sections has an inlet opening, and the same or a different well section has at least one outlet opening.

Abstract: A hydraulic fluid reservoir and hydraulic pump combination has at least one hydraulic fluid port and includes a container with a hollow body having a top and a conduit having a bottom within the container and a top above the bottom. The conduit has an opening adjacent to the bottom of the conduit. The opening is spaced apart below the top of the container. A closure member is releasably, sealingly connected to the top of the conduit. Hydraulic fluid can be added to the container via the conduit up to the level of the opening of the conduit. Addition of further hydraulic fluid fills the conduit to the top thereof and the conduit overflows if additional hydraulic fluid is added after the top of the conduit is reached by the fluid. Preferably the container has a main interior chamber and a smaller chamber which is adjacent to one of the side walls of the container. The smaller chamber is has a bottom opening near the bottom of the smaller chamber which communicates with the main interior chamber.

Abstract: A control system for maintaining the liquid levels in a plurality of reservoirs connected in series includes one or more nested control modules. The nested control module, one for each reservoir, includes a proportional only level controller in electrical communication with the respective level sensor of each respective reservoir and is adapted to produce an output that becomes a set point for one or more respective PID flow controllers adapted to control the respective outflows of said respective reservoirs. The control system results in maintaining liquid levels in the reservoirs while substantially eliminating flow and level oscillations.

Abstract: During the deposition of a catalytic component on a carrier, the position of the liquid level of a slurry containing the catalytic component is controlled with high accuracy and the adhesion of the slurry to the lateral face of the carrier is prevented. In the deposition of the liquid substance on the carrier by the introduction of the liquid substance into the carrier from the bottom face thereof, a water-detecting sensor detects the liquid level near the top face of the carrier.

Abstract: In a feed device with a filling-level sensor fastened to a wall of a baffle, the filling-level sensor has a lever wire for holding a float. A carrier for mounting the filling-level sensor to a wall of the baffle is connectable to the wall in at least two different orientations. The pivoting range of the float is set by the selected orientation of the carrier on the wall. The feed device is consequently suitable for use in differently constructed fuel tanks.

Abstract: A fluid transfer system and method for removing and replacing fluids in a fluid system. The fluid transfer system comprises an output hose coupled to an input line of the fluid system, and a return hose coupled to an output line of the fluid system. The fluid transfer system further comprises a low-level fluid sensor capable of being installed by an operator in a clean tank, and a high-level fluid sensor capable of being installed by the operator in a waste tank. The fluid transfer system further comprises a clean fluid pump for pumping clean fluid from the clean tank to the output hose. The fluid transfer system further comprises an operator adjustable clean fluid regulator to control a flow rate of clean fluid in the output hose, and an operator adjustable waste fluid regulator to control the flow rate of waste fluid in the return hose.

Abstract: A mechanical seal assembly includes a leak detector mounted thereon for detecting low rates of liquid leakage across the seal rings of the mechanical seal. The leakage detector collects the liquid leakage and includes a fiber optic sensor for detecting the leakage once the flow rate of the leakage becomes excessive.

Abstract: Fuel shut-off device for use in a diesel fuel tank to discontinue fuel flow to a fuel pump comprises a valve seat forming a fuel flow opening for fuel to flow from the fuel tank to the fuel pump, a fuel control valve cooperably disposed relative to the valve seat to control fuel flow from the fuel tank to the fuel pump, and a spring biasing the fuel inlet valve to a closed position against the valve seat. A diaphragm is provided having a first valve-actuating side for moving the fuel inlet valve relative to the valve seat against bias of the spring and a second side. The second side is communicated to a control chamber having an inlet orifice that is communicated to the fuel tank and an outlet orifice that is communicated to said fuel pump.

Abstract: An alarm valve system includes a valve body, a valve seat in the valve body with a groove in the sealing face of the seat. A valve element is positioned to seat on the sealing face. A vent extends from the groove in the valve seat to be in communication with a flow alarm and an accumulator alarm. The accumulator alarm includes a cavity with an opening above and a liquid level switch in the cavity. A drain valve is below the cavity.

Abstract: A control valve device has a valve seat having a pressure inlet hole, a first through hole communicating with the pressure inlet hole, an inflation hole, an outlet hole communicating with the inflation hole, and a second through hole communicating with the inflation hole. A non-return valve is inserted in the pressure inlet hole. A one-way check valve is inserted in the outlet hole. A safety valve is disposed on the valve seat to communicate with the inflation hole. A first nut is disposed on the valve seat. The first nut has a through aperture communicating with the pressure inlet hole. A second nut is disposed on the valve seat. A pressure pipe is inserted through the pressure inlet hole and the first through hole.

Abstract: An opaque container fluid indicator is constructed to include a mount fixedly fastened to the spout of an opaque fluid container, a bladder holder supported on the mount to hold an elastic transparent bladder, and two suction tubes respectively fastened to two bottom through holes of the bladder holder and suspended in the opaque fluid container to suck fluid into the bladder. Air passes through the suction tubes to force fluid out of the bladder when the level of fluid in the opaque fluid container drops below a predetermined low level.

Abstract: A control valve device has a valve seat having a pressure inlet hole, a first through hole communicating with the pressure inlet hole, an inflation hole, an outlet hole communicating with the inflation hole, and a second through hole communicating with the inflation hole. A non-return valve is inserted in the pressure inlet hole. A one-way check valve is inserted in the outlet hole. A safety valve is disposed on the valve seat to communicate with the inflation hole. A first nut is disposed on the valve seat. The first nut has a through aperture communicating with the pressure inlet hole. A second nut is disposed on the valve seat. A pressure pipe is inserted through the pressure inlet hole and the first through hole.

Abstract: A control system for maintaining the liquid levels in a plurality of reservoirs connected in series includes a parenthetical control module and one or more nested control modules. The parenthetical control module includes a proportional only level controller in electrical communication with the level sensor of said last reservoir (VOUT) in the series and is adapted to produce an output signal that becomes a set point for one or more PID flow controllers controlling the inflow (FIN) into the first reservoir (V1) in the series. The nested control module, one for each reservoir upstream of said last reservoir (VOUT), includes a proportional only level controller in electrical communication with the respective level sensor of each respective upstream reservoir and is adapted to produce an output that becomes a set point for one or more PID flow controllers adapted to control the respective outflows of said respective upstream reservoirs.

Abstract: The invention relates to a control equipment for keeping light oil vapor at stable pressure and constant temperature, it mainly supply a device for keeping temperature constant and pressure stable so as to stay the light oil in a steel bottle at a fixed saturated vapor pressure and not to let the saturated vapor pressure of the light oil be influenced by an outside temperature of background; it's structure comprises: a pressure stabilizing device, which can adjust the saturated vapor pressure of the oil vapor in a light oil tank, is utilized to control air pumping by a pressure switch and a resistor air motor, wherein a check valve therein prevents air from flowing back, a hollow pressure stabilizing tube at it's upper side is utilized to buffer air and then carry it into the light oil so as to reach the purpose of pressure stabilization; a constant temperature maintaining device, which keeps temperature constant by a temperature-controlled relay, when temperature is too high, the temperature-contro

Abstract: The disclosure relates to a method of regulating the level in a buffer tank (4). By means of conduits (2, 6), the tank (4) is connected to different parts in or peripheral to a process (1). There is an inflow F1 in the incoming conduit (2) and an outflow F2 in the outgoing conduit (6). The method comprises periodic measurements of the inflow F1 and also of the level L of the product which is held in the tank (4). The method also encompasses calculated and indicated level norm values which are indicated such that the level norm value is high when the outflow F2 out of the tank (4) is slight and the level norm value is low when the outflow F2 out of the tank (4) is great.

Abstract: A device for checking the contents of a container (5) for a supply substance (8) that is not self-leveling. The device includes a stirring blade (2) that is rotatable about an axis of rotation (D) for the delivery of the supply substance (8) to a consumer (21), for example, the suction chamber (2) of a lubricating pump, and for freeing the supply substance (8) of air inclusions, with a mechanism for scraping off the supply substance (8) from the stirring blade (2) and with a measuring unit (22) for measuring the fill level of the supply substance (8) in the container (5). The region of the container bottom (9) has openings (18) for transferring the supply substance (8) in a direction toward the consumer (21) and at least one radial stationary flank (1) is disposed, at least locally, in the region of the container center and is spaced from the container bottom (9) such that the stirring blade (2) can be at least partially rotated under the radial stationary flank.

Abstract: A slab gel processing tank is provided according to the invention. The slab gel processing tank comprises a bottom, two substantially parallel end panels, and two substantially parallel side panels having substantially vertical lower portions and outwardly angled upper portions, with the upper portions being textured to minimize contact with a gel slab, wherein the tank is adapted to be filled with a gel processing working fluid.

Abstract: A fluid filtration system includes a mechanism for monitoring and indicating the volume of fluid that has passed through a filter 30. The mechanism includes a channel 42 in communication with a reservoir 22, a portion of which is visible exteriorly of the housing 12. The channel allows a minor portion of the fluid entering the housing via inlet 14 to flow into the reservoir, while allowing the remaining portion of fluid to flow through the outlet 16. The minor portion of fluid entering the reservoir may or may not have passed through the filter. In various embodiments, the system may also include an indicator such as a float 44, a plunger 54, or dye.

Abstract: This invention relates to a storage tank for a viscous oil containing easily polymerizable compounds. A storage tank of the present invention for strong viscous oil containing easily polymerizable compounds, comprising a bottom plate 12, a side wall 13, a draw-off pipe 3 and a inlet pipe 2. The bottom plate 12 slopes downward toward the draw-off pipe 3 and an angle of downward inclination of the bottom plate 12 is gradient at least 1/200. It becomes possible by the present inventive storage tank to effectively prevent the polymerization of the easily polymerizable compounds contained in the waste oil within the storage tank and the clogging of a pipe is suppressed considerably.

Abstract: An automated apparatus for cleaning golf balls constructed of light weight, portable type material and operable via standard battery power. The apparatus utilizes a housing having a fluid reservoir in the lower portion for holding a cleaning fluid, and a screw-type driven auger along with a pair of driven brushes and a fluid spray nozzle in the upper portion. A driven pump transports the cleaning fluid from the reservoir to the nozzle, which sprays the cleaning fluid on the golf ball as the auger and brushes engage the ball and remove the soil, respectively. Multiple sensing means are employed to energize and disable the apparatus upon the occurrence of predetermined events.

Abstract: An apparatus for mixing a first liquid with at least a second liquid includes a tank having a mixing chamber to which is connected a first and a second supply line from each of a first and a second source of liquid. A gross control valve disposed in each of the first supply lines and a fine control valve disposed in each of the second supply lines. A noncontacting detector measures the total volume of liquid present in the mixing chamber. A controller, operable in response to signals output from the detector representative of the total volume within the mixing chamber as continuously measured by the detector, actuates in accordance with a predetermined sequence the gross and the fine control valves in the respective first and second supply lines from the first source and from the second source in accordance with a predetermined sequence.

Abstract: In a tank system, in particular a fuel tank system, which comprises a tank (1) with at least one filling level transmitter (7, 8) and also a display (11) for indicating the filling level of the tank (1), a measurable and indicatable reserve volume (3V) which is arranged in the tank and is always refuelable as a priority via an inflow pipe (2) and the content of which is available as a fuel reserve when a minimum filling level is reached in the main tank (1), a switching means (7, 12) for activating, by means of a control unit (10), an indicator (17, 18) signaling operation on fuel reserve (=extraction of fuel from the reserve), and a splash pot (3), together with fuel pump (5), arranged in the main tank (1), according to the invention the measurable and indicatable reserve volume (3V) is the content of the splash pot (3) itself.

Abstract: A system and method ensures that the wet lines of a bottom loading petroleum cargo tank remain free of hazardous liquid during transit. The system and method continuously monitor and automatically purge liquid that collects in the wet lines during transit, for example from a leaking emergency valve. The system includes a liquid sensor positioned at a low point in the wet line, a low pressure purge controller in electrical communication with the liquid sensor and a solenoid valve in electrical communication with the purge controller. The system further includes a one-way flow valve in flow communication with the solenoid valve and the wet line. The solenoid valve is also in flow communication with an external source of compressed gas, such as the air system of the cargo tank or an auxiliary air supply. Preferably, the system further includes a remote warning indicator for indicating to the operator of the cargo tank that a particular wet line is leaking excessively.

Abstract: A two stage alarm system for detecting rising levels of sludge in septic tanks, and similar sedimentary tanks. The system, to detect a first or “caution” level, and a second or “critical” level of sludge, relies upon a pair of vertically positioned weight sensitive switching mechanisms which, when triggered by the rising levels of sludge, will send appropriate signals to a remote alarm mechanism, such as at the residence, to activate a “yellow” and/or “red” light, for example, thus alerting the owner of the tank to the need for remedial action.

Abstract: A fuel tank has a delivery unit which is arranged within the tank body and which has a reservoir. The delivery unit can be introduced into the tank body through a closable opening in the wall thereof. The tank further includes a filling level measuring device which is arranged outside the reservoir of the delivery unit and which can also be introduced into the tank body through the opening. The measuring device can be introduced into the tank body separately from the delivery unit and is held in its operative position by a holder mounted to the opening. The holder can be in the form of a ring mounted to the edge of the opening.

Abstract: A flow control device for a toilet to prevent flooding upon obstructing of a waste outlet of a toilet bowl. The device includes at least one sensor assembly mounted on a rim of a bowl of a toilet or urinal to hold the sensor assembly in a predetermined position within the bowl. If water bridges contacts on the at least one sensor assembly, an electrical circuit is completed, and a solenoid is actuated to close a normally opened valve to shut off running water to the water tank of the toilet. A power source and a valve open alarm system are electrically connected to the at least one sensor assembly and the solenoid actuated valve.

Abstract: The Automatic Shutoff Overflow Controller comprises a circuit which engages between a source of power and a water processing device, the controller, sensing an undesirably high water level in the device, shutting off the device and producing an audible warning that such condition exists.

Abstract: The present invention discloses an automated processing liquid drain system that utilizes a series of processing liquid drain tanks and at least two waste collection tanks that are in fluid communication with the processing liquid drain tanks such that when a high liquid level sensor mounted on the drain tank is activated, the spent processing liquid collected from processing machines can be transferred to one of the waste collection tanks and thus preventing overflow in the processing liquid drain tanks.

Abstract: The waste liquid collection and transfer system includes at least one waste liquid transfer vessel that has a liquid input valve and a liquid output valve for controlling the flow of waste liquid therethrough. A pressurized gas liquid transfer system including at least one control valve is utilized to provide pressurized gas to said vessel to control the flow of liquid therefrom. A liquid drain line is engaged from the vessel to a liquid collection tank, and a liquid level alarm device is engaged to the tank to provide an alarm if the level in the tank becomes too high. An electronic system controller is engaged to the alarm device and to the various valves to control the flow of liquid throughout the system. When an alarm signal is received by the system controller the vessels are first emptied and thereafter allowed to become full, acting in this instance as additional waste liquid storage containers. When the vessels are full, the system controller shuts down the flow of liquid to the vessels.

Abstract: A method of monitoring the status of a plurality of steam traps includes sensing with a monitor at least one process condition in each of a plurality of steam traps, transmitting radio frequency signals responsive to the sensed process condition of each steam trap with transmitters associated with the steam traps, and receiving the signals generated by the transmitters with a receiver. In one embodiment of the invention, the signals from at least some steam traps are received and retransmitted by a repeater positioned between the steam traps and the receiver.

Abstract: A condensate trap comprises a trap element 12 disposed in a trap chamber 6, and a sensor chamber 16 containing a sensor element 24 for monitoring the performance of the trap element 12. The sensor chamber 16 communicates with the trap chamber 6 through a first passageway 26 and one or more second passageways 28. The first passageway 26 opens into the sensor chamber 16 at an upper region of the sensor chamber, while the second passageway 28 opens at a lower region, so that the sensor element 24 is situated at a level above the lowermost part of the port at which the second passageway 28 opens into the sensor chamber 16. If the trap element 12 does not close the outlet 10 properly, condensate accumulating in the sensor chamber 16 will be forced into the trap chamber 6 through the second passageway 28, and the level will fall to expose the sensor element 24 which will react to provide an alarm signal.

Abstract: A household appliance water leak detection and management containment wall made from one or more oblong pieces of water-resistant, shape-retaining, flexible sheet material such as aluminum. The ends of the pieces may be joined to circumscribe a zone of contact between the appliance and its supporting surface, forming a containment space. A layer of sealant creates a water-resistant seal between a lower edge of the wall and the supporting surface. An electronic water-detection and alarm device may be placed within the containment space. A valved spigot may be mounted through a portion of the wall to allow drainage.

Abstract: A variable volume fluid storage tank or reservoir and related fluid transfer system are provided for storing and transferring volatile or hazardous fluids, particularly such as fuel in an aircraft fuel supply system. Each fluid storage tank comprises a tank body in combination with a movable base wall defining a variable volume internal chamber for receiving and storing fluid. Each storage tank further includes a dispense port for dispensing the fluid, e.g., to a manifold or the like for supply to one or more aircraft engines, with the base wall moving relative to the tank body during fluid dispensing to substantially preclude any residual air or vapor space within the storage tank. A fluid level sensor unit mounted outside the tank chamber tracks displacement of the base wall to provide an indication of the fluid volume remaining within the storage tank.

Abstract: A reservoir tank includes a main portion and a storage chamber disposed in the main portion for storing operating fluid, with the storage chamber being surrounded by a side wall, a ceiling portion and a bottom portion. A float is disposed in the storage chamber and is adapted to move vertically corresponding to the height of the operating fluid level, and a reed switch is operatively associated with the float so as to operate in accordance with the height of the float. A partition member divides the storage chamber into an upper space and a lower space in which the operating fluid and the float are disposed.

Abstract: A filter arrangement for filtering fluid comprises a housing and a valve arrangement. The housing includes an inlet, an outlet, and a draining aperture. The valve arrangement is constructed and arranged to move between a closed position and an open position without the use of threads. The closed position prevents evacuation of fluid from the housing through the draining aperture, and the open position permits evacuation of fluid from the housing through the draining aperture. One valve arrangement may include a pair of ports and a pair of air vents. The valve is actuated by aligning the ports and air vents on a sliding sealing surface. An indicator arrangement including a float and a clear window is provided to give the user a visual indication of the level of water within the filter. Methods for using the constructions herein are provided.

Abstract: A closed type water storage container with water level controller and air filtering device, wherein the closed type water container is linked to the water level controlling device by a connection tube and the connection tube is provided with filtering materials for filtering of the moving water at the water level controlling device, such that water and air within the storage container are filtered and clean.

Abstract: A hose assembly is provided for transmitting liquid fuel between the fuel tank of a highway truck and the fuel tank of an airport refueler. The assembly comprises inner and outer hoses. The inner hose transmits liquid fuel. A sealed passage is formed between the inner and outer hoses. Each end of the hose assembly is connected to a respective port for transferring the fuel between the highway truck fuel tank and airport refueler tank. The assembly includes at least one sensor port for connecting the passage to sensing means to detect leakage from the inner hose to the passage. A leakage sensing system is coupled to the sensor port for detecting leakage of fuel from the inner hose to the passage and for generating sensor signals. The leakage sensing system includes: (1) a pressure sensor for detecting a change in pressure within the passage, and (2) a liquid sensor for detecting the presence of liquid within the passage.

Abstract: The invention relates to a device coupled to a fluid container. The device contains a fluid inlet and a fluid outlet and is capable of dispensing fluid into the fluid container. The device also contains an alarm to warn a user that the container is substantially empty.

Abstract: A flow control device for a toilet to prevent flooding upon obstructing of a waste outlet of a toilet bowl. The device includes a sensor assembly mounted on a clip held over a rim of the toilet bowl so as to hold the sensor assembly in a predetermined position within the toilet bowl. The clip may include adjustable elements thereon to enable the height of the sensor assembly to be adjusted, depending on the size and type of toilet in which it is affixed. If water bridges contacts on the sensor assembly, an electrical circuit is completed, and a solenoid is actuated to close a normally opened valve to shut off running water to the water tank of the toilet. The present invention is an easily-added-on, simplified device for use with a toilet bowl to prevent flooding, if the waste outlet of the toilet bowl is blocked for any reason.

Abstract: A condensate trap assembly includes a monitoring device 4 which is closely coupled to, or integral with, a condensate trap 2. The monitoring device 4 includes a flow restriction 56 and a condensate receiving chamber 48 which accommodates a sensor 66. The chamber 48 communicates with an inlet passage 52 on the upstream side of the flow restriction 56 and, via a bore 50, with an outlet passage 54 on the downstream side of the flow restriction 56. The sensor 66 provides an indication of the condition of the condensate trap 2, in accordance with whether the sensor tip 68 is submerged in condensate and in accordance with the temperature of the condensate.

Abstract: The present invention provides an automated chemical drain system which includes a buffer tank for collecting used chemical from a process machine, at least two level sensors in the buffer tank for sensing a fluid level and sending out a signal, a controller for receiving the signal from the level sensors and then sending out a second signal to a solenoid controlled valve when the first signal exceeds a threshold value, a solenoid controlled valve that is in fluid communication with the buffer tank and a collection tank, and a collection tank for collecting used chemical from the buffer tank. The collection tank may further be provided with a weight sensing device such that a signal may be sent out to the controller when the weight of the collection tank exceeds a maximum allowable value so that the controller shuts off the solenoid controlled valve to avoid overflow in the collection tank and to alert a maintenance operator to empty the collection tank.

Abstract: A filter arrangement for filtering fluid comprises a housing and a valve arrangement. The housing includes an inlet, an outlet, and a draining aperture. The valve arrangement is constructed and arranged to move between a closed position and an open position without the use of threads. The closed position prevents evacuation of fluid from the housing through the draining aperture, and the open position permits evacuation of fluid from the housing through the draining aperture. One valve arrangement may include a pair of ports and a pair of air vents. The valve is actuated by aligning the ports and air vents on a sliding sealing surface. An indicator arrangement including a float and a clear window is provided to give the user a visual indication of the level of water within the filter. Methods for using the constructions herein are provided.

Abstract: A method of monitoring the status of a plurality of steam traps includes sensing with a monitor at least one process condition in each of a plurality of steam traps, transmitting radio frequency signals responsive to the sensed process condition of each steam trap with transmitters associated with the steam traps, and receiving the signals generated by the transmitters with a receiver. In one embodiment of the invention, the signals from at least some steam traps are received and retransmitted by a repeater positioned between the steam traps and the receiver.

Abstract: A tank for holding a liquid for a predetermined and relatively long time in a continuous flow process. The tank includes an inner compartment with an inlet and an outer compartment with an outlet. The outer compartment encloses the inner compartment except its inlet. The liquid enters through the inlet and is forced upwardly in a non-preferential flow, it overflows to the outer compartment and comes out through the outlet. A pump is connected to the outlet and a variable throttle valve is in turn connected to the output of the pump. A level sensor for the liquid is connected to a computerized control unit to monitor the liquid level and to activate the throttle valve to either restrict or increase the flow to adjust the liquid level. Since the flow rate then is brought back to what it was when throttle valve is restricted to its original state, then changing the liquid level in the second compartment is equivalent to changing the holding time.