Patent ID: 11885436
Assignee: EBM PAPST LANDSHUT GMBH
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 7:
8. A method for monitoring the coaxial dual-safety valve of the valve monitoring system according to claim 1, wherein, during the gas request in the course of a heat request, the method runs through the steps:
a) the first and the second pilot valves are brought for a predetermined time interval into the open position and immediately thereafter into the closed position,
b) the control valve is brought into the open position,
c) the switching pressure in the fluid space is checked and, for the tightness check of the second pilot valve, is compared with a pressure threshold value,
d) the first and the second pilot valves are brought into the open position,
e) after completion of the gas request, the first and the second pilot valves are brought into the closed position, and then the control valve is brought into the closed position,
f) the switching pressure in the fluid space is checked and, for the tightness check of the first pilot valve, is compared with a pressure threshold value.