Kromschroder Regulator Gas Pressure Reducing Valve Gdj20r04-4 for for Industrial Burners & Boilers

• Customization: Available
• Certification: CE, ISO
• Customized: Non-Customized
• Model NO.: GDJ20R04-4
• Surface Treatment: Natural
• Fuel: Gas
• Range of Applications: Industrial
• Type: Air Fuel Proportional Valve
• Name: Solenoid Proportional Valve
• Deliver Time: 3~15days
• Term of Payment: EXW/Fob
• Use: Gas Burner Accessories
• Model: Gik15r02-5
• Transport Package: Carton
• Specification: 150(W)*100(H)*105(L)mm
• Trademark: Kromschroder
• Origin: Germany
• HS Code: 8302600000
• Production Capacity: 100

Product Description

Original Kromschroder GDJ20R04-4 Gas Proportional Valves Air Fuel Ratio Valve For Industrial Heating

OVERVIEW

    The air/gas ratio controls GIK and GI serve 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 continuous control (Fig. 1), GIK..B with bypass for high/low/off control (Fig. 2). Zero-pressure regulation with conversion kit (Fig. 7). EN 746-2 demands that a burner always be ignited with a stable gas-air mixture. This requirement can be met with the aid of the air/gas ratio control. EC type-tested and certified to the Gas Appliance Directive (90/396/EEC).

PRODUCT PARAMETERS

Name	Air Fuel Ratio Valve
Brand	Kromschroder
Model	GDJ20R04-4
Origin	Germany
Deliver Time	3~15 days
Usage	gas burner accessories

  

 

FEATURES

 

- The GDJ can be converted to the
GIK..B. The bypass screw must be
exchanged for this purpose.
- With spring for compensating for the weight of the metering assembly in the case of continuous control.
- Air/gas ratio control with inlet pressure compensation diaphragm and zero shut off.

 

 

The air/gas ratio control is activated by the pressure of the air line. It regulates the gas outlet pressure pa in the ratio 1:1 to the air control pressure pL. The burner capacity is varied with the aid of the air valve. Furnace pressure fluctuations have the same effect on gas and air throughput, thus meaning that the gas-air mixture does not change. In the min.-flow range, the gas-air mixture can be set by adjusting the governor spring. For step-by-step control, the springs are relieved at the factory to ensure that the low-fire rate volume only flows through the bypass. The setting at high fire is performed via restrictors or valves on the burner.

GIK
Type of gas: Natural gas, town gas, LPG (gaseous), biologically produced methane, GIK..L only for air.
Connection: Female thread to ISO 7-1.
Air control pressure pL: 0.5 to 120 mbar.
Outlet pressure pa: 0.2 to 119 mbar.
Differential pressure between inlet pressure pe and outlet pressure pa: max. 100 mbar.
Transmission ratio: 1:1.
Bypass diameter GIK..B:

GIK 15-25: standard 1.5 mm, possible to 4 mm,

GIK 40-50: standard 5 mm, possible to 9 mm
Adjusting range at min. flow: -3 to +3 mbar.
Regulating range: 10:1.
Connection for control line: to Rp 1/4.
Housing: AlSi.
Diaphragms: NBR.
Valve seat: AlSi.
Valve disc: Plastic.
Valve disc seal: NBR.
Bypass screw: Brass.
Ambient temperature: -20 to +70°C.

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