Zhejiang Shuangkong Electrical Technology Co., Ltd. was established in July 2022. The company is located in Huzhou City, a city in the northern part of Zhejiang Province, the intersection of Zhejiang, Jiangsu, and Anhui provinces, the central area of the Yangtze River Delta, and the central city of the G60 Science and Technology Innovation Corridor. The company mainly engages in PLC modules, CPU modules, input/output modules, analog modules, power modules, communication modules, switching modules, interface modules, control modules, switching input/output modules, frequency converters, servo drives, motion controllers, S120 CNC, soft starters, DC speed regulators, network cables, motors, servo motors, motor drivers, motor supporting cables, touch screens, industrial control computers, switches, buildings Industrial automation drive products such as actuators, controllers, electric eyes, flame detectors, combustion valves, burners, displays, etc. Our products are widely used in industries such as automotive, electronics, food processing, mechanical manufacturing, clothing processing, and modern logistics. The company adheres to the business philosophy of "putting urban credit first and not sacrificing the future for short-term benefits". We will continue to innovate, forge ahead, and welcome inquiries and orders.

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The LDU11... valve inspection device is specifically designed for safety shut-off valves, which are used in gas burners and other gas applications. In the event of gas leakage, the system can prevent the burner from starting.

LDU11... meets the requirements of automatic shut-off valves covered by EN1643, which meet the needs of EN161 gas burners and gas applications.

LDU11... and its data sheet are applicable to OEM manufacturers who combine this device with their products.

LDU1 1, specifically designed for gas valve verification (leak testing), is based on the following pressure detection principles.

It can be used in gas combustion devices with or without a discharge pipe.

For devices that comply with EN standards without discharge pipes, the precautions in the "Connection Case without Exhaust Pipe" must be followed. I

When used in conjunction with 1 to 2 pressure switches, valve verification will automatically begin at the start of each burner.

-Priority over the start-up of the burner, with a duration of 1 minute for the first blowing time; Start immediately when the shutdown control command is issued, or when the burner control is completed, for example, during the post purge phase

Valve verification testing is based on the principle of pressure verification testing at level 2:

1. Phase 1 testing: First, discharge the testing area of the main pipeline valve thoroughly, and then test the atmospheric pressure inside.

2. Phase 2 testing: Pressurize the testing area of the burner valve to detect gas pressure

If the pressure of testing 'Test1' in the first stage increases, while the pressure of testing 'Test2' in the second stage decreases. The valve verification device will prohibit the burner from starting and lock it out.

In this case, the lock reset button will light up to indicate an error. Remote indication errors can also be used. When a problem occurs, the program will stop and indicate that the valve is leaking

The valve verification device can be reset on the device itself or through a remote reset device.

Insertion Design Valve Verification Device LDU11

-Replaceable fuses (including backup fuses)

-The rack is made of black plastic that is resistant to pressure and fire

-The lock reset button on the window to be observed can display:

- Error signal indicator light

- Lock indication

-Program device

-Transparent lock reset button

-Convenient memory markers indicate the type of error and the stage of occurrence

-Synchronous motor with gear transmission program switch and stepper action program switch

-Cam set with 15 cams that do not require adjustment

-There is a program indicator at the top of the camshaft

-One main relay and one auxiliary relay

-The locking relay can be remotely reset and provides functions of 'lock t' and 'reset'

-Equipment fuses and backup fuses

All electrical components can be wired according to the printed circuit diagram

In the first stage of valve validation testing, Test1, there must be atmospheric pressure present in the long pipeline between the two valves for testing.

In a device with a discharge pipe, if the valve verification test is conducted first or during the cleaning stage