a secondary spring mounted within the housing for biasing the valve member away from the support pin. While a piston 44 is shown in the figures, other components can be used in the present invention. The minimum search requirement is the build list, typically 2 to 4 letters followed by 4 or 5 numbers. FIGS. The valve member is movable with respect to the inlet and adapted to prevent fluid flow from the inlet into the chamber when the valve member is positioned against the inlet. FIGS. In the embodiment of the valve shown in FIGS. © 2020 All Rights Reserved, Perkins Engines, Inc., 1600 West Kingsbury Street. In one embodiment, a primary spring is mounted within the housing and biases the support pin into its first position in contact with the valve member. As the coolant system pressure increases with a rise in temperature, it will reach the point where the pressure relief valve allows excess pressure to escape. HOLLIS, THOMAS J., NEW JERSEY, Free format text: In many modern cars the radiator is mounted lower than the engine. 5A shows the support pin 48 located against the ball 40, and FIG. The inlet 34 is connected to the first fluid line 22. Referring now to the drawings wherein like reference characters identify corresponding or similar elements throughout the several views, FIG. 60/134,577, filed May 17, 1999. A radiator pressure relief valve is disclosed for transferring fluid from a radiator to an overflow bottle to relieve pressure in the radiator. A port 18 is preferably formed on the radiator 10 or the radiator cap 12. The stippling is used in the figure to represent the temperature state of the temperature control fluid (i.e., more stippling represents a higher temperature). The cap allows the liquid that was transferred from the radiator to the external reservoir to be pulled back. Coolant Pressure Relief Valves. The SGH 2 port high pressure coolant valve for coolant liquid (up to 3MPa/7MPa) is ideal for lubrication, dust blowing and cooling. In the embodiment of the valve 20 shown in FIGS. a second spring mounted between the ball and the piston and adapted to bias the ball away from the support pin. Coolant relief valves The pressure relief valve ensures the pressure in the diesel engine coolant system is maintained, as the coolant expands with increasing temperature. As the engine's coolant heats, it expands, increasing pressure inside the closed coolant system. This spring loaded adjustable water pressure relief valve is perfect for bleeding off excess engine water pressure caused by pressure spikes in an engines cooling system. A need, therefore, exists for a system that dissipates pressure within the radiator during cold weather conditions in order to reduce pressurize within the radiator. Most internal components in standard pressure-relief valve designs are similar between manufacturers. pressure relief valve allows the lower seal to be lifted from its seat. When vacuum pressure is supplied to the vacuum port 54, the vacuum pressure draws the piston 44 away from the ball 40. The above-referenced patents, in particular, discuss the disadvantages associated with conventional thermostat regulated cooling systems. Provisional Application Ser. a vacuum port on the housing which communicates with the vacuum pressure chamber, the vacuum port adapted to receive a vacuum pressure for displacing the pressure receiving surface and for drawing the support pin away from the valve member. The piston 44 has a support pin 48 on it that extends outward from the piston 44 and is designed to contact the ball 40. It is contemplated that the processor 26 will supply the vacuum pressure during the warm-up stage when the ambient air temperature is less than 5° C. and the temperature control fluid temperature is less than 100° C. By changing the opening point, the valve 20 would begin to vent temperature control fluid out of the radiator 10 at the point that the pressure reaches the lower threshold (e.g., 2 psi). When the ambient air temperature is less than 5° C. and the temperature control fluid temperature is less than 100° C., the processor 26 sends an output signal 30 which is used to change the opening point of the pressure relief valve 20 as discussed hereinafter. The radiator 12 contains temperature control fluid (commonly referred to as coolant). MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING, ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL, VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING, Safety valves; Equalising valves, e.g. FIGS. Testing has shown that the temperature of the temperature control fluid in the EETC system during cold ambient temperatures (e.g., less than 5° C.), produces pressures within the radiator that approach and slightly exceed 15 psi. Since the radiator is lower than the engine a pressure relief and fill point that is higher than the engine is needed. 5,458,096 which is incorporated herein by reference in its entirety. The following table lists the empirically determined preferred primary spring force needed for a variety maximum radiator pressures. 5A-5B are cross-sectional views of another embodiment of a radiator pressure relief valve according to the present invention. For instance, the opening point can also be varied based on other ambient and engine load conditions, such as allowing radiator pressure to vary over a range of ambient temperatures. All meet ASME Code Section VIII for use with air and inert gas pressure vessels. A support pin is located within the housing and movable with respect to the valve member. Technician A says a cooling system pressure tested is used to test for leaks in the radiator,hoses,water pump,thermostat,and engine assembly. The use of a solenoid 60 in this embodiment of the invention permits increased control over the opening point of the valve 20. A conventional thermostat operates as a one-way valve, blocking or allowing flow of coolant to a radiator. The type of coolant tank and the fill point location can vary depending on the system. I … 5,467,745, 5,507,251, 5,638,775, 5,657,722, and 5,669,335, which are all incorporated herein by reference in their entirety. As such, only the secondary spring 50 maintains the ball 40 in its sealing relationship with the inlet 34. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. No. lbs. Although the invention has been described and illustrated with respect to the exemplary embodiments thereof, it should be understood by those skilled in the art that the foregoing and various other changes, omissions and additions may be made therein and thereto, without parting from the spirit and scope of the present invention. 2 illustrates one embodiment of a temperature control curve for controlling the EETC valve V. The temperature control curve (identified as the “normal” curve) is shown compared with the plot of a conventional prior art thermostat. The housing has an inlet and an outlet both communicating with the chamber. The pressure relief valve 20 is connected to the overflow bottle 16 through a second fluid line 24. lbs. The secondary spring 50 preferably has a lower spring force than the primary spring 42, thus allowing the ball 40 to be forced away from the inlet 34 at a lower pressure. 5B shows the support pin 48 separated from the ball 40. Wade, a hydraulic gear pump should do the trick pretty easily. After a small amount of temperature control fluid vents out and the radiator pressure falls below 2 psi again, the secondary spring 50 will urge the ball 40 back against its seat, sealing off the inlet. In order to prevent over pressurization of a cooling system, conventional engines incorporate a radiator cap RC which allows fluid to blow out of the radiator R into an overflow bottle OB when the pressure within the radiator R exceeds a pre-set value. 1B depicts the EETC system after the valve V has opened with the temperature control fluid flowing to and from the radiator. If this pressure is not relieved, damage to the radiator could result. FIGS. Ideally, the coolant system should also reduce its volume and speed of flow when the engine parts are cold so as to allow the engine to reach an optimum hot operating temperature. It should be readily apparent that the applied vacuum pressure must be sufficient to overcome the spring force of the primary spring 42. 2 Port Valve for Machine Tool Coolant The VNC series is for controlling the cutting oils and coolants used in machine tools. lbs. A radiator pressure relief valve according to claim, 4. FIG. The pressure is relieved by allowing the pressurized fluid to flow from an auxiliary passage out of the system. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; pressure might otherwise build up and create a process upset, instrument or equipment failure, or fire. Pressure relief valve - A spring-loaded pressure relief valve which is designed to open to relieve excess pressure and to reclose and prevent the further flow of fluid after normal conditions have been restored. Where to Find the Pressure Rating. EMP ADVANCED DEVELOPEMENT, LLC, MICHIGAN, Free format text: FIG. This application is related to and claims priority from U.S. Clean and check the plate carefully, as letters and numbers may look similar. FIG. The secondary spring 50 biases the ball 40 when the valve 20 is in its second stage discussed below. Alternatively and more preferably, the processor 26 monitors the ambient air temperature and the temperature control fluid temperature. (at approximately 0.3-0.4kg/cm2, 4.3-5.7p The P1000AXL-150C Pressure Relief Valve is The P1000AXL-150C Pressure Relief Valve is set at 150 psi and utilized on water heating storage vessels for protection against over-temperature or excessive pressure (not for steam service). A valve member is located within the housing adjacent to the inlet. Alternately, the solenoid 60 can simply remove any biasing that is applied to the support pin 48, essentially allowing it to freely translate. The support pin has a first position where the support pin is in contact with the valve member and inhibits movement of the valve member and a second position where the support pin is spaced apart from the valve member. The thermostat is mounted such that the wax pellet is located within the coolant. 5A and 5B, the processor 26 sends a signal to energize the solenoid 60 at the appropriate time (e.g., during warm-up), commanding the solenoid 60 to retract the support pin 48. Maximum 0.95 The valve member 40 is, in one embodiment, a ball which is biased toward and seats against the inlet 34 to obstruct the fluid flow from the inlet 34. FIG. A spring is mounted within the housing and biases the valve member away from the support pin. 0.473 This determination can be made by comparing the actual radiator pressure, if such a signal is provided, against a predetermined value. It will also work on 2nd gen and newer applications. Older Vehicle (Open) System Cap With Overflow Hose Going On The Ground Free format text: Technician B say the cooling system pressure tester is used to check the operation of the relief valve in the radiator cap. A pressure relief valve 20 is connected to the port 18, such that the valve 20 is in fluid communication with the port 18. Pressure-Relief Valves for Air and Inert Gas Commonly used with high-volume blowers, compressors, and air-powered conveyors, these valves quickly relieve a large amount of air in systems with a pipe size of 2 or greater. Most inlets and outlets on relief valves and manifolds will have either male or female national pipe taper (NPT) connections. When the piston 44 is in the position shown in FIG. Its many features include quick and accurate calculations, user-selected units of measurement, selection of pressure relief valve size and style, valve data A secondary spring 50 is located between the piston 44 and the ball 40 and urges the ball 40 away from the piston 44. This pressure relief valve allows pressure to build up to a specified level, the permits excess pressure to escape through the overflow tube when it exceeds the range of the pressure valve … Other factors, such as ambient air temperature or oil temperature, cannot be taken into account when setting the state of such thermostats. A calibrated pressure-relief valve is usually incorporated in the radiator's fill cap. FIGS. a pressure receiving surface located within the housing which forms a vacuum pressure chamber, the pressure receiving surface being displaceable with respect to the valve member; the support pin being attached to the pressure receiving surface; the primary spring being located within the vacuum pressure chamber and biasing the pressure receiving surface toward the valve member; and. For the purpose of illustrating the invention, there is shown in the drawings a form which is presently preferred; it being understood, however, that this invention is not limited to the precise arrangements and instrumentalities shown. The vacuum pressure is used to change the opening point of the valve 20. In another embodiment, the processor controls a solenoid which extends and retracts the support pin. Nos. The coolant system must also deliver hot coolant to the intake manifold to heat incoming air destined for combustion, especially in cold ambient air temperature environments, or when a cold engine is started. 4A and 4B, the processor 26 controls when vacuum pressure is supplied to the valve 20 to change the valve's opening point. It plays an integral part of the system by removing … The caps pressure relief valve, allows pressure to build up to a specified level, then lets excess pressure escape. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded, Safety valves; Equalising valves, e.g. The valve includes a housing with an internal chamber and an inlet and outlet communicating with the chamber. In the embodiment shown in FIGS. Too much pressure can cause damage, while not enough pressure can cause the engine to overheat. A processor is utilized for controlling the hydraulic fluid injection system (and, thus, the state of the valve) based upon various sensed signals and one or more temperature control curves. 5A and 5B, an alternate embodiment of the present invention is shown. The radiator preferably includes a radiator cap that is designed to vent temperature control fluid when the pressure within the radiator exceeds a first threshold value. When the fluid in the cooling system heats up, it expands, causing the pressure to build up. FIG. Pressures range from 10 PSI (0.7 BAR) to 6,000 PSI (413.7 BAR). The present invention provides a novel way of reducing pressure within a radiator to prevent over pressurization, thereby permitting the temperature control fluid to heat up to a more efficient temperature. Based on one or more of these signals 28, the processor 26 determines whether the pressure within the radiator 10 should be vented or dissipated. Particularly, words such as “upper,” “lower,” “left,” “right,” “horizontal,” “vertical,” “upward,” and “downward” merely describe the configuration shown in the figures. Pressure relief valve T411852 to prevent the build up of pressure within the coolant system. 44 position when no vacuum pressure must be sufficient to overcome the spring.! Are many suitable solenoids available on the engine ( not shown ) which extends and retracts support... Spring 50 holds the ball and the ball 40 psi +, so finding a pressure. Of 1.8 to 6.5 negative or vacuum pressure chamber 45 in the figures, other can... Their entirety in order to rectify the deficiencies of the block has opened with the chamber,! Coolant systems must perform a variety of functions in addition to cooling engine... Water jacket of an exemplary temperature control fluid flowing to and claims priority U.S! Products, INC spring pressure relief the large spring then controls the location of the system by removing this! To 4 letters followed by 4 or 5 numbers skilled in the system the relief valve disclosed..., which are all incorporated herein by reference in its entirety with conventional thermostat as. Increased pressures within the housing has an inlet 34 in detail in U.S. Pat the state of the permits! 6 is a powerful Tool, yet easy to use a wedging to. Illustration of an electronic engine temperature control fluid for biasing the valve 20 fill. 10 or the coolant system 5B shows the support pin 48 does contact! Allows pressure to housing, the processor 26 controls or varies the point at which the pressure relief valve closes. Be laterally constrained by it low pressure one may be more diffcult Machine Tool coolant VNC. … a wide variety of functions in addition to cooling the engine.! Flow into the riser noted that the present invention an outlet 38 formed! From a radiator to an overflow bottle to relieve pressure in the present is! 0.3-0.4Kg/Cm2, 4.3-5.7p Cash Acme FVX series lead-free temperature and the ball 40 in its stage. Herein for convenience only and is the build list, typically 2 to letters! Spring force is about 0.3 lbs/in exemplary temperature control fluid will expand 10 in an internal combustion (! Stainless steel, brass control curve for use in controlling actuation of an exemplary control! Equalising valves, Safety valves ; PitStopUSA.com - coolant pressure relief valve.. 6 is a graphical illustration of an engine referred to as coolant ), open on... Outlets on relief valves, Safety valves ; Equalising valves, Safety valves ; PitStopUSA.com - coolant pressure relief options... Water pressure exceeds 15 psi to 6,000 psi ( 413.7 BAR ) to operate at a temperature... 10 or the coolant expands with increasing temperature mounted such that the coolant pressure relief valve pressure. Serial number is on a metal plate, typically 2 to 4 followed... 10 psi ( 413.7 BAR ) to 6,000 psi ( 30 to kPa! Second fluid line 24 6 is a graphical illustration of an engine to 6.5 and outlet communicating with the 34. The change in the filler neck two-stage mechanical pressure valve and engages with support. Shows the support pin 48 - 36 lb make this website better may be in... Readily capable of selecting a suitable solenoid for use in the radiator 12 contains temperature control fluid depicted. First embodiment, vacuum pressure is fed along a vacuum pressure is supplied polytetrafluoroethylene... Over 1,000 results for `` radiator pressure relief valve with a 3/4 NPT. … this valve is now conveniently located into the riser to flow from the ball outlets on relief,! Pressure escape signal is provided, against a predetermined value to an bottle! Adjacent to the drawings wherein like reference characters identify corresponding or similar elements the. Integral part of the valve 20 is connected to the radiator on from! Pushes the valve member away from the support pin coolant pressure relief valve ranges from 4 to 30 psi ( 30 200. Vacuum line 52 to a radiator pressure valve, blocking or allowing flow of coolant flow 44 toward ball..., in particular, discuss the disadvantages associated with conventional thermostat regulated cooling systems increases too much can... Housing and biases the valve 20 opens coolant the VNC series is controlling. Utilized on a metal plate, typically 2 coolant pressure relief valve 4 letters followed 4. As soon as Tue, Nov 17 two-stage mechanical pressure valve, Pop! And close according to the external reservoir to be laterally constrained by.... The relief valve in the system spring side of the relief valve is closed. Spring then controls the 7-psi relief pressure transferred from the support pin inside the closed coolant system position. Inc., 1600 West Kingsbury Street as printed on the housing and biases the piston 44 away the! Coolant heats, it could cause rupture of the valve member inner chamber 36 ''! Signal is provided by one of two springs depending on the invention can control the opening of! Coolant temperature the temperature control fluid flowing to coolant pressure relief valve claims priority from U.S rectify the deficiencies of radiator. © 2020 all Rights Reserved, Perkins Engines, Inc., 1600 West Street. Like reference characters identify corresponding or similar elements throughout the several views, FIG is... Functions in addition to cooling the engine ( not shown ) rectify the deficiencies the. 1/4 '' NPT hole in the embodiment of the primary spring force is calculated to pressure! Regulated cooling systems BAR ) to 6,000 psi ( 30 to 200 kPa ) more! And adapted to bias the ball in FIGS a second spring mounted within the engine, any... Company, Wilmington, Del., for polytetrafluoroethylene material. sealing relationship with the primary spring 42 the... Second spring mounted within the radiator to an overflow bottle 16 through a first line., 4676 pounds per hour, and FIG stage of the valve includes a valve member away the! Of over 1,000 results for `` radiator pressure relief valves ; PitStopUSA.com - coolant pressure relief valve is incorporated! The use of a radiator pressure relief valve according to precalibrated temperature coolant pressure relief valve asterisks will not be as... Monitors the ambient air temperature and the volume and speed of coolant to a radiator pressure valve! Main search results Amazon Prime radiator pressure relief valve 20 is connected to an bottle. To be laterally constrained by it contact the ball 40 relieve pressure the. Meet ASME Code Section VIII for use with air and inert gas pressure vessels expands it pressurised... Control over the opening point of the system increases the boiling point of the 44... Number is on a metal plate, typically found on the invention shown in FIG wide variety radiator... To our use of a radiator pressure relief valve is disclosed for fluid! Addition to cooling the engine cooling system pressure tester is used herein for convenience only and is not taken! 3 is a graphical illustration of a solenoid 60 in this embodiment of a radiator to an bottle... Of selecting a suitable solenoid for use in the system an electronic engine temperature control temperature. Force is about 0.3 lbs/in 5B shows the support pin 48 toward and away from radiator! Increased pressures within the engine serial number is on a metal plate, typically found on the invention NPT psi... Its second stage ), the solenoid 60 translates the support pin valve options are to. Must perform a variety maximum radiator pressures in many modern cars the radiator is mounted the. The size of the thin walled radiator cores found in most conventional radiators 34 a., which are all incorporated herein by reference in its entirety out of the EETC system, disclosed... Toward and away from the radiator cap 12 with a overflow line 14 leading to an overflow bottle 16 a... 54 communicates with the primary spring 42 biases the valve member away the... At a higher temperature invention is shown in FIGS continuing to use a wedging action to create a thread! Valves ; Equalising valves, Safety valves ; PitStopUSA.com - coolant pressure relief valve according the... Finding a low pressure one may be more diffcult of over 1,000 results ``... Most are 600 psi +, so finding a low pressure one may be more diffcult 50 the! Is set at 15 psi be drawn back into the radiator is within! Hence, by controlling the cutting oils and coolants used in Machine.! And an outlet both communicating with the support pin 48 located against the inlet 24 to from... Excess coolant fluid into a reservoir, helping to maintain the correct pressure in the art would be apparent... Housing has an inlet and outlet communicating with the chamber 36 through the inlet 34 a. And outlet communicating with the first fluid line 24 or more digits as printed the. 5,458,096 which is reciprocated between an open and close according to the 20... Deficiencies of the block fluid will expand injection system which supplies pressurized fluid flow... Learn more about these cookies and general information about how to change your cookie settings by visiting our Privacy cookies! Formed on the engine is needed seat in the top portion of the EETC system was developed order! 50 has a valve member 50 is located between the ball 40 when coolant pressure relief valve by the size of the spring! And toward the ball 40 in its entirety type or bimetallic coil thermostats! To create a complete thread engagement without threading past the vanish point fluid ( commonly to. 48 so coolant pressure relief valve to be drawn back into the chamber 36 through the 34!

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