A multistage automated thermally actuated valve utilizing a thermally expansive substance to substantially close the valve at a first temperature and a spring to open the valve at a second, lower temperature. A multistage automated valve comprising a first thermal assembly to balance fluid flow at a first temperature and a second thermal assembly to balance fluid flow at a second temperature in order to balance fluid flow in a system operated at a first temperature as well as at a second temperature. A method of utilizing an automated thermally actuated valve to balance and manage hot water supply in a piping system.

A thermostatic valve includes a valve body with a cavity provided therein, an end cover assembly, and a thermal actuator and at least one spring that are mounted in the cavity. The valve body is provided with at least three ports including a first port, a second port and a third port. The thermal actuator includes a valve rod and a main body. The spring includes a first spring. The cavity includes a first cavity and a second cavity, and the second cavity is away from the end cover assembly. The first port is in communication with the first cavity, and the third port is in communication with the second cavity. The first spring is partially or completely located in the second cavity. The thermostatic valve further includes a guide fitting part. The thermostatic valve has a simple structure, and the operation thereof is more stable and reliable.

A temperature regulating valve and a thermal management system provided with the temperature regulating valve are provided. The temperature regulating valve includes a filling state and a first working state, and a thermodynamic element is impelled to not abut against a first valve seat by means of providing a hot melt in an end cover of the temperature regulating valve. When a first valve port is in an open state, at said time the temperature regulating valve is installed in the thermal management system, and since the first valve port is in the open state, lubricating oil may then flow into a heat exchange device by means of a first interface channel, the first valve port, and a second interface channel during a process of filling the lubricating oil.

A thermostatic valve includes a valve body, first and second elastic members, a valve seat assembly, a valve core, and a thermal actuator. The thermostatic valve includes six ports, four valve port portions each having a valve port, and a first cavity and a second cavity which are isolated from each other. One of the third port, the fourth port and the sixth port is in communication with the second cavity, and the other two of the third port, the fourth port and the sixth port are configured to be in communication with the second cavity through valve ports; and one of the first port, the second port and the fifth port is in communication with the first cavity, and the other two of the first port, the second port and the fifth port are configured to be in communication with the first cavity through valve ports.

An apparatus for controlling the flow rate of engine coolant by use of a thermostat may include a thermostat arranged in an inflow flow path for the engine coolant and a flow rate regulator arranged in a bypass flow path for the engine coolant between a cylinder head of an engine and the thermostat. The flow rate regulator regulates the flow rate of the bypass flow path such that a differential pressure of the coolant between a front end for allowing the coolant flowing from a radiator to flow into the thermostat and a rear end for allowing the coolant to be discharged from the thermostat is within a predetermined range.

A thermostatic valve, including: a valve body having a cavity provided therein; an end cover, a thermal actuator and a first spring which are provided in the cavity. The end cover is provided with a first valve seat; the first valve seat is provided with a first valve port; the first valve port is provided opposed to a second port, and the first valve seat encloses an inner end opening of the second port; an outer wall of the first valve seat enclosing the inner end opening of the second port is in clearance fitting with an inner wall of the cavity; an outer wall at an end of the body of the thermal actuator which is near the end cover is in slide fitting with an inner wall of the valve seat; the thermostatic valve opens and closes the first valve port by means of the body of the thermal actuator.

A bypass system has a source of a fluid to be cooled and a heat exchanger for selectively cooling fluid. A piston is moveable along an axis allowing movement of a valve poppet toward and away from the valve seat. The piston moves with a rigid seal carrier. The rigid seal carrier and the piston move within a valve housing. A wax element is disposed on an opposed axial side of the rigid seal carrier relative to a chamber, such that the wax element expands as a temperature of the fluid to be cooled increases, and causes the valve poppet to move against the valve seat. A bypass valve is also disclosed.

The disclosure provides a heating and hot water supply apparatus which includes a heating circulation path configured to circulate a heated heating medium with a heating terminal, and a bypass path branched from the heating circulation path for causing the heating medium to flow therethrough without passing through the heating terminal. A hot water supply heat exchanger is disposed in the bypass path. A division ratio of the heating medium from the heating circulation path to the bypass path is controlled by a distribution valve. The division ratio is increased from a first value to a second value when a reservation preheat control is started during the heating operation according to a start reservation time of hot water supply operation reserved by a timer, and set to a third value greater than the second value during a simultaneous operation of the hot water supply and the heating operation.

A thermostat for an engine cooling system may include a housing comprising a radiator-side flowing-in inlet for flowing-in coolant from a radiator side, a bypass-side flowing-in inlet for flowing-in the coolant bypassed from an engine, and a coolant flowing-out outlet for flowing-out the coolant to the engine side; and a main valve provided in the housing, and for opening and closing the radiator-side flowing-in inlet by a change in the volume of a wax. The direction in which the coolant flowed-in through the radiator-side flowing-in inlet presses the main valve and the direction operated to open the main valve are opposite to each other.

Disclosed is a thermostatic valve, including: a pressure relief ring capable of moving up and down and disposed in a valve body cavity. In normal conditions, the pressure relief ring is abutted against the outer edge of a first valve seat by means of a spring. An internal channel capable of being opened or closed by means of up and down movement of the pressure relief ring is further provided in the valve body cavity; when the pressure of a fluid in the thermostatic valve is excessive, the fluid can drive the pressure relief ring to compress the spring, such that the internal channel is in communication with a third interface to realize simultaneous communication with a first flow channel and a third flow channel, and thus damages caused by excessive pressure of the fluid in the temperature regulating valve can be prevented.