MEP-A Press safety valves


Definition

MEP-A is a series of safety valves for presses and pneumatically acting safety subject groups; they are 3 way/2 pos. NC active components for compressed air powered single acting actuators control.
To achieve their safety duties according to effective standards, such as EN 692 for CEE countries, these valves must be redoundant (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.


Accomplishment

MEP-A are redoundant 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 ancillary monitoring system with manual reset can be actuated by two pressure switches, delivered as an option, mounted on the relevant connections.


Technical specifications

Model
Nominal
size
Connections
Working
pressure
Passage
Operations
Mass
Power
consumption
(each coil)
A
P
R
min
bar
max
bar
P-A
mm²
A-R
mm²
no./1'
kg
DC
W
AC(VA)
inrush
AC(VA)
holding
313MEP-A-50
10
1/2"
3/8"
1"
2
8
19
176
200
2,2
6
16
10
314MEP-A-50
15
1/2"
1/2"
1"
2
8
25
176
180
3,8
9
23
14
314MEP-A-52
20
3/4"
1/2"
1"
2
8
40
320
180
3,8
9
23
14
316MEP-A-50
30
1"
3/4"
1½''
2
8
62
500
160
7,5
9
23
14
318MEP-A-50
318MEP-A-70
40
1½''
1"
2"
2,5
8
205
1200
140
17,6
6
40
22





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