Cast iron automatic return water start/stop valve KTH11X-10

KTH11X automatic return water start/stop valve is a necessary product for the return water pipeline of atmospheric boiler, and it can also be used as the hydraulic control switch of the pipeline. Only with this valve can the boiler really realize atmospheric operation, otherwise the atmospheric boiler will not work, or work under pressure causing danger, or need to use expensive electromagnetic control device. When the pump is turned on, the pressure is transmitted to the control valve through the pressure control tube, the control valve opens, and the system begins to run; when the pump is stopped, the return pressure and reset spring will be used to close the return control valve, and can effectively prevent the return water from entering the boiler when the circulating pump stops working due to a sudden power outage or other reasons, resulting in overflow of boiler water. In the boiler system, the traditional water return valve can not automatically sense the circulating pump's working status, and it needs to be operated manually to open and close the valve, which is very time-consuming and laborious. The automatic return valve solves this problem, it can automatically open and close the circulating water system with the opening and closing of the opening and closing of the water system, which greatly saves manpower operation, improves work efficiency, and also solves the problem of boiler overflow.

Structural Features

• The valve automatically opens with the start of the pump, so that the return water is unobstructed, no matter what the reason is, as long as the pump stops running, the valve will automatically shut off the return water, thus eliminating the worry of the backflow of the return water.
• Automatic water return valve has its own buffer performance, in general under normal circumstances, the effect is reflected in a very good, but due to some pipeline situation is more complex, there are very few water shock phenomenon.

Working Principle

The working principle of the automatic return water start/stop valve is very simple, in which the core element is actually a piston. Plug valve body inside a vertical shaft, the shaft above the piston can move freely, below is a conical valve and pressure springs, when the boiler circulating water system begins to work, the upper piston by the pressure of hot water, will move down, thus opening the conical valve; when the circulating water system stops working, the upper lose hot water pressure, the piston will move up, close the conical valve, so that you can radically This will solve the boiler overflow problem fundamentally.

Product Parameters

Installation

1. How and where the automatic return start/stop valve is to be installed, paying particular attention to the direction indicated by the arrow on the valve body.
2. Gate valves shall be provided at both ends of the automatic return start/stop valve body.
3. The control pipe of the automatic return valve must be connected to the outlet pipe, and between the pump outlet and the check valve. Do not install on the pipeline connected to the outlet of the check valve, otherwise the valve will not work.
4. No debris, such as pockmarks, shall be brought into the valve joints.
5. This valve needs to be installed in front of the decontaminator, otherwise it is easy to occur debris support cushion valve flap caused by leakage phenomenon.

work regulations

1. Check whether the process flow is in line with the construction drawings, the door direction is not wrong, no abnormalities in the manual pump, after the airlift is normal, the direction is correct.
2. Open the pump inlet valve, control valve line, air release valve, guide valve, add water to the system, and then close the air release valve and guide valve after the air is discharged, so that the pump can be turned on to supply water.
3. Two pumps connected in parallel (one open and one standby) cannot open the control valve at the same time, otherwise the automatic check valve will not open easily.
4. If the automatic check valve needs to be opened temporarily after stopping the pump, the control valve should be closed tightly before stopping the pump.
5. Automatic check valves close too quickly when the noise is large, control valves can be closed until the appropriate position.

Troubleshooting solutions

1. Automatic return water start/stop valve can not be opened: carefully observe whether the installation of this valve is reasonable, whether the operation is correct, and whether the control pipe valve is open.
2. Stop pump boiler overflow: check for operation errors and check check check valves for leaks.