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product

2 Wire Fast Closing Electric Valve Inside Home Gas Meters

Model No.: RKF-2-2W

Short Description:

RKF-2 is a special valve installed on the gas meter to control on-off the gas. With the unique design of the ratchet mechanism, there is no problem with motor blocking during the opening and closing of the valve. This design prevents the gears from being damaged or seized under high pressure. There is a spring in the valve, which absorbs energy when the valve is opened, so the energy required to close the valve is extremely low, and the valve can be closed instantaneously.


Product Detail

Product Tags

Installation Location

The motor valve may be installed in the smart gas meter.

fast-close gas meter valve1

Advantages

Built-in motor ball valve’s Advantages
1.Fast closing
2.Stable structure Max pressure can reach 200mbar
3.Close with low energy
4.Flexible customized solutions: You can choose the switch function from 2 wires to 6 wires.
5.No motor blocking

Instruction For Use

1. The lead wire of this type of valve has three specifications: two-wire, four-wire or six-wire. The lead wire of the two-wire valve is only used as the valve action power line, the red wire is connected to positive (or negative), and the black wire is connected to negative (or positive) to open the valve (specifically, it can be set according to customer requierements). For four-wire and six-wir e valves, two of the wires (red and black) are the power supply wires for valve action, and the remaining two or four wires are status switch wires, which are used as signal output wires for open and closed positions.
2. Power supply requirements: DC2.5V for 2s when opening valve. When the valve is closing, the power supply time should be longer than 300ms, and the valve can be effectively opened and closed.
3. The minimum drive voltage of the valve shall not be lower than 2.5V. If the current limit design is in the process of opening and closing the valve, the current limit value shall not be lower than 100mA
4. It is recommended that the minimum DC voltage of the valve should not be less than 2.5V. If the current limit design is in the valve’s process of opening and closing, the current limit value should not be less than 60mA.

Tech Specs

Items requirements Standard

Working medium

Natural gas,LPG

Flow range

0.016~6m3/h

Pressure Drop

0~20KPa

Meter suit

G1.6/G2.5

Operating voltage

DC2.5~3.9V

ATEX

ExicⅡBT4 Gc

EN 16314-2013 7.13.4.3

Operating temperature

-25℃~60℃

EN 16314-2013 7.13.4.7

Relative humidity

5%~90%

Leakage

2KPa or 7.5ka <1L/h

EN 16314-2013 7.13.4.5

Motor electric performance

14±10%Ω/8±2mH

Current-limited resistance

10±1%Ω

Max current

≤173mA(DC3.9V)

opening time

≤2s(DC3V)

Closing time

≤0.3s(DC3V)

Limit Switch

None/one side/twp sides

Switch resistance

≤0.2Ω

Pressure loss

With meter case≤200Pa

EN 16314-2013 7.13.4.4

endurance

≥10000次

EN 16314-2013 7.13.4.8

Installation location

Inlet


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