Dual Safety Valves
MEP-A are redundant (double-body), parallel flow pneumatically actuated valves, rated to limit in case of malfunction, the residual pressure to values under 3% of the inlet pressure.
Their inherent dynamic monitoring system blocks valve operation safety in case an inner leakage occurs, also if very low and not detectable by usual position sensors.
A phase difference between the two bodies of a few tenth of a second causes the self-locking of the valve, which cannot be inserted back until the safe running in the rest position will be restored (delivery sealed and parallel exhaust of both bodies).
Reset is automatic when the normal function is restored in the stand by position. An auxiliary monitoring system with manual reset can be actuated by two pressure switches, delivered as an option, mounted on the relevant connections.
Definition
MEP-A is a series of safety valves designed with an intrinsically dynamic safety control system. These are 3 way/2 pos. NC active components for compressed air powered single acting actuated control.
To achieve their safety duties according to effective standards, such as EN 692 for CEE countries, these valves must be redundant (double-body) and equipped with a dynamic failure monitoring device. They now spread in four models from nominal size 10 to 40, all with BG approval.
Construction
| Function |
3/2 NC |
| Construction type |
poppet |
| Pilot system |
electopneumatic inter |
| Fluid |
filtered and lubricated air |
| Materials |
body aluminum gaskets polyurethane and NBR |
| Conectors |
with varistors |
| Mounting Position |
vertical pilots |
| Temperature range |
-10ºC + 50ºC |
| Monitoring circuit |
inherent, dynamic |
| Reset |
automatic | |
