KROM SCHRODER GIK 50R02-5 gas ratio control

APPLICATION & FUNCTION

Air/gas ratio controls GIK with inlet pressure compensation
diaphragm and zero shut-off serve to maintain a
constant gas/air ratio and to control the gas pressure
upstream of gas burners in systems without preheated
combustion air.
For use in gas control lines in all sectors of the iron,
steel, glass and ceramics industries, as well as in commercial
heat generation, such as the packaging, paper
and foodstuffs industries.

Air/gas ratio control GIK is actuated by the air line pressure.
The valve disc is lifted from the valve seat and the
gas flows into the regulator outlet area via the open
valve seat. The outlet pressure is applied to the space
above the working diaphragm via the impulse line. The
outlet pressure is controlled in a ratio of 1:1 to the air
control pressure. The inlet pressure compensation diaphragm
ensures high control accuracy.
The burner capacity can be adjusted using the air control
valve. Furnace pressure fluctuations have the same
effect on the gas and air throughput so that the gas/air
mixture will remain unchanged.
The spring can be used for compensating the weight
of the measuring unit. In the low-fire range, the gas/air
mixture can be set by adjusting the spring. For staged
control, the spring is decompressed at the factory in
such a way that the low-fire rate only flows through the
bypass.
Adjustment at high-fire rate is carried out using restrictors
or valves on the burner.
The zero shut-off prevents an increase in the outlet
pressure when the consumer is switched off.
Test nipples have been installed to measure the static
inlet, outlet and control pressures.

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