Abstract:
PROBLEM TO BE SOLVED: To achieve flow rate control without depending on the scale and the piping system of a load side, and further to save energy.SOLUTION: In a heat source system 1, a host controller 20 includes an opening command value determination part 22 for determining a bypass valve opening value such that a header differential pressure as a differential pressure between a supply header and a return header is equal to a differential pressure target value; an opening target value setting part 24 for setting an opening target value corresponding to behavior of the header differential pressure or bypass valve opening; and a heating medium flow rate setting part 23 for holding opening flow rate characteristics where relation between bypass valve opening indication values and a heating medium flow rate set values is predetermined while being associated with opening target values, and acquires a heating medium flow rate set value corresponding to the opening command value determined by the opening command value determination part 22 using opening flow rate characteristics corresponding to the opening target value set by the opening target value setting part 24.
Abstract:
An automatic balancing valve is described provided with a valve body having at least one inlet channel and an outlet channel for a heat transfer fluid, wherein the flow regulation is carried out by a ball shutter having an axial through channel with axis perpendicular to the rotation axis of the ball. The ball valve has at least one radial channel aligned with the rotation axis of the ball and is connected to the axial through channel. The radial channel has an outlet port having a circular cross-section which hydraulically connects the axial through channel of the ball with the outlet channel of the valve.
Abstract:
An automatic balancing valve is disclosed which is equipped with choking means that can be operated manually with a ring nut (30) placed below the actuating member (20) of the shutter and aligned axially therewith. Advantageously, the dimensions of the ring nut are larger in plan view compared to the plan view dimensions of the actuating member so as to allow its rotation without removing the actuating member..
Abstract:
An on demand tankless water heater system that is capable of quickly delivering water within a desired temperature range. The tankless water heater provides a hybrid heating method that contains a primary heating system and a secondary heating system disposed in a buffer tank that cooperate to facilitate control of output water temperature during water usage. A pressure differential switch detects low flow demand and allows the secondary heating system to provide immediate heating to the water. This secondary heating system provides a faster temperature response and fine tuning of output water temperature.
Abstract:
A device, preferably a terminal valve, the complete valve being provided with a cone (9), which cooperates with a valve seat (10), said components also cooperating with a veil (12) and the valve seat (10) being a part of a seat ring (19), which is a combined sealing element, which seals against the cone (9) as well as against the valve body (1), at the same time as the seat ring is a valve seat (10), and the cone (9) having a cylindrical portion (46), which is provided with slits (49) and (50), the passage area, which is obtained, causing a flow, which corresponds to a modified logarithmic function.
Abstract:
A device, preferably a terminal valve, the complete valve being provided with a cone (9), which cooperates with a valve seat (10), said components also cooperating with a veil (12) and the valve seat (10) being a part of a seat ring (19), which is a combined sealing element, which seals against the cone (9) as well as against the valve body (1), at the same time as the seat ring is a valve seat (10), and the cone (9) having a cylindrical portion (46), which is provided with slits (49) and (50), the passage area, which is obtained, causing a flow, which corresponds to a modified logarithmic function.