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Krom Schroder Brand GIK40R02-5 Ratio Regulator
GIK50R02-5 Ratio Regulator
Application
The gas/air ratio regulators GIK and GIserve to maintain a constant
air-gas ratio and to regulate the gas pressure upstream of gas
burners on installations without preheated combustion air.GIK and
GI for modulating control, GIK..B with bypass for high/low/off
control. Zeropressure regulation with conversion kit.
Function
Krom Schroder gas/air ratio regulator is activated by the pressure of the
combustion air line. It regulates the gas outlet pressure in the
ratio 1:1 to the air control pressure.The burner capacity is varied
with the aid of the air control valve.
Furnace pressure fluctuations have the same effect on gas and air
throughput, thus meaning that the gas-air mixture does not
change.The low fire rate can be set by adjusting the regulator
spring.
In the case of high/low control (GIK..B), the spring should be
fully relaxed. The min. flow flows only through the bypass.The
setting at high fire is performed via orifices or valves on the
burner.
Technical data
GIK, GI
Type of gas: Natural gas, town gas, LPG (gaseous), biologically
produced methane,GIK..L, GI..L only for air.
Max. inlet pressure: 3 psig (200 mbar).
Combustion air control pressure:0.2 to 48 "WC (0.5 to 120 mbar).
Outlet pressure:0.08 to 47.5 "WC (0.2 to 119 mbar).
Differential pressure between inlet pressure pe and outlet pressure
pa: max. 40 "WC(100 mbar).
Transmission ratio: 1:1.
Bypass diameter GIK..B:GIK 15–25: standard 0.06 inch (1.5
mm),possible up to 0.157 inch (4 mm)
GIK 40–50: standard 0.197 inch (5 mm),
possible up to 0.354 inch (9 mm).
Adjusting range at min. flow:-1.2 to +1.2 ”WC (-3 to +3 mbar).
GIK
Connection: NPT-thread.
Connection for control line: 1/4 NPT.
Housing: Aluminium.
Diaphragms: Perbunan.
Valve seat: Aluminium.
Valve disc: Plastic.
Valve disc seal: Perbunan.
Bypass screw: Brass.
Ambient temperature:
-4 to +158°F (-20 to +70°C).