Kromschroder Flow adjusting cock for gas GEH20R10 03352507

The Kromschroder GEH20R10 (03352507) is a manual needle valve used for precise adjustment of gas or air flow in burner fuel supply systems. It has a nominal diameter of 20 mm, weighs 210 g, and is operated manually. The valve allows smooth flow adjustment and position locking with a tool, ensuring correct gas-air ratio during commissioning and operation. It is designed for use with gas at pressures up to 1 bar and air up to 4 bar.

When selecting a replacement flow adjusting cock of this type, key parameters include connection size, thread type (e.g., external R 3/4" and internal Rp 3/4"), and pressure ratings for gas and air. Verify the existing part's markings and the burner specification to ensure the new cock matches the required nominal diameter and flow characteristics. During installation, use gas-resistant sealing materials, observe the flow direction arrow on the body, and ensure the adjusting screw is accessible. After installation, perform a tightness test and re-set the flow using appropriate instruments.

Typical failure modes for flow adjusting cocks include internal wear or leakage, which can lead to improper gas-air ratio, burner instability, or reduced efficiency. Signs of failure may include difficulty in adjusting flow, visible gas leaks, or the need for frequent readjustment. If leakage is suspected, the cock must be replaced, as adjusting the position will not restore sealing.