Flammable gases

Systems for flammable gases
The volumetric gas mixing systems for flammable gases are used in processes where mixed gas, consisting of a non-flammable and non-corrosive gas and one or two flammable gases, is required with a mixing precision of 1 or 2 % and no electrical signals need to be analysed.

The mixing gas concentration is set directly in % by volume using mechanical handwheels. The nominal capacity refers to the maximum mixed gas quantity in Nl/min based on gas inlet pressures of 6.0 bar(g) and a mixed gas outlet pressure of approx. 3.0 bar(g).

Other pressure ratios result in different actual mixed gas outputs.

There are two types of gas mixing systems:

1. gas mixing systems for continuous gas consumption
These systems are especially suitable for a continuous consumption process. Their mixing precision is maintained within a range of 20-100% of the nominal capacity.

Depending on the design, these systems do not require a power supply.

All gas-carrying components of these systems are located in a painted sheet steel housing.

2. gas mixing systems for intermittent gas consumption
These systems are specially designed for an intermittent or highly fluctuating flow rate consumption process.

All gas mixing systems for intermittent gas consumption initially produce the gas mixture set on the handwheels into a container from which it can be fed into the process in a range of 0-100% of the nominal capacity.

The mixing accuracy is maintained over the entire mixed gas extraction range.

These systems are designed to be intrinsically safe and are supplied via a separate electrical control unit.

The control units require a mains connection.

All gas-carrying components of these systems are located in a painted sheet steel housing. The containers are optionally made of steel or stainless steel.