Kromschroder Air/gas ratio control GIK 15R02-5B 03155171

Kromschroder GIK 15R02-5B is a pneumatically actuated air/gas ratio control with no electrical connection. It maintains a 1:1 gas/air ratio and offers a 1:10 turndown. The unit has a nominal diameter of 15 mm with Rp 1/2" internal thread, and accepts a maximum inlet pressure of 200 mbar. Its pressure range is 0.005–1.2 mbar. Features include inlet pressure compensation, zero closure, and an outlet pressure test point. It is suitable for natural gas, LPG, and air, and is certified to EN 88 and CE.

Replacements for this type of air/gas ratio control are selected by connection size, pressure range, and whether the application requires modulating or on-off duty. The thread type and nominal diameter must match the existing gas train. Before ordering, confirm compatibility with the burner's pneumatic signal pressure and the gas train configuration. During installation, the pneumatic impulse lines must be clean and correctly connected.

Failure of this type of control usually involves the diaphragm or internal moving parts aging or clogging, which leads to a drifting gas output. The burner may show unstable flame or incorrect air/fuel ratio. Check the impulse lines for blockage or leaks, and inspect the diaphragm for damage or deformation.