Operations involved in filling reservoirs are among the most critical from the standpoint of ensuring technospheric safety, and they are carried out relatively slowly. The most time-consuming step in restoring the operational readiness of fire engines is filling the designated tank with foam concentrate. This work considers methods for filling the foam concentrate tank on fire engines during the restoration of operational readiness. To reduce the time required to fill the foam concentrate storage tank, a technical solution has been proposed for using a stationary vacuum unit on a fire tanker, and both technical calculations and experimental tests have confirmed its effectiveness. This approach will shorten the time required to prepare a fire tanker for service after a fire. Containers for foam concentrates on fire engines used by fire protection units are manufactured from St3 steel, stainless (alloy) steel, and polyethylene. The technical parameters of the tanks installed on fire engines do not allow filling them using a vacuum pump, since the standard design cannot withstand the required stress at a vacuum of 0.0981 MPa (1 kgf/cm2). It is shown that reinforcing typical foam concentrate tanks with vertical struts made of St3 steel and/or alloy steel, as well as adding stiffening ribs to polyethylene tanks, will preserve the geometric wall-thickness parameters during production and operation.
Semenov et al. (2026) studied this question.