LEWA, a leader in advanced diaphragm pumps, has expanded its micro-metering pump portfolio with two new models, the MAH4 and MBH6, offering greater flexibility in flow and pressure for cost-efficient gas odorisation.

Gas odorisation, essential for safety, involves adding a strong-smelling chemical to flammable or critical industrial gases—such as natural gas, LPG, CNG, LNG, hydrogen, and oxygen—allowing leaks to be detected quickly and protecting people and property.

LEWA’s pumps, including the MAH, MBH, MLM15, and MLM40 series, deliver flows from 10 ml/h to 55 l/h and pressures up to 560 barg.

The MAH4 supports 16 barg, complementing the MAH3 for PN16 pipelines, while the MBH6 provides a compact solution up to 0.6 l/h at 42 barg.

Both feature metal diaphragms, solenoid drives for hazardous environments, leak-proof design, wide control range (1:1000), high energy efficiency, low maintenance, and long operational life, ensuring precise, safe, and economical odorisation.

Walter Richter, Head of Sales Odorisation & Gas Distribution at LEWA, explains: "Efficient odorisation involves very precise dosing with minute quantities of chemicals, so selecting a pump to match the application’s flow rate and discharge pressure is critical to success. Traditionally, operators found that a pump suitable for the required flow rate did not deliver enough pressure, and vice versa. This leads to increased odorisation costs due to pump oversizing and can cause poor injection accuracy. By introducing the MAH4 and MBH6 micro-metering pumps with new piston sizes, we can offer a wider selection of flow and pressure combinations, enabling more effective and cost-efficient odorisation with higher accuracy."