67
Setting into Operation
Test Procedure for Tuchenhagen PMO Valves Type M/2.0
Test Procedure for
Tuchenhagen PMO Valves Type M/2.0
Purpose
•
The purpose of test procedure 1 is to verify and ensure that the detection devices
which detect and confirm the closed position of the upper and lower seats of the
PMO valve (in accordance with PMO Item 15p (B) – point 1. b. (2)) are adjusted and
are functioning properly.
•
The purpose of test procedure 2 is to confirm that the interlock provided for PMO
valve type M/2.0 is working correctly during active switching of a CIP operation.
Process Overview
Carrying out test procedure 1 allows the Regulatory Inspector to manually perform seat
lifting of the upper and the lower valve disk on the valve in order to verify that the posi-
tion detection devices for the upper and lower valve disks change their feedback signals
when the corresponding valve disk leaves the closed position.
Hardware Description
1. 3 solenoid valves are fitted in the T.VIS M-15 control top
a)
Solenoid valve Y1 – actuation of main valve
b)
Solenoid valve Y2 – lifting of lower seat
c)
Solenoid valve Y3 – lifting of upper seat
These valves can be activated externally by signals from the PLC.
2. The closed position of the lower seat is detected by sensor S1. The correct adjust-
ment of the system to enable the closed position of the lower seat to be detected is
described in detail in the operating instructions for valve M/2.0 and in the chapter enti-
tled “Adjusting the Sensor in the Control Top“ (page 52).
The sensitivity of the position measuring system is 0.1 mm.
3. The closed position of the upper seat is detected by the external proximity switch S3
fitted to the lantern. The correct adjustment of the proximity switch to enable the closed
position of the upper seat to be detected is described in detail in the operating instruc-
tions for valve M/2.0 and in the section entitled “Adjusting the Proximity Switch in the
Lantern of PMO Valve Type M/2.0“ (page 64).
The sensitivity of the position measuring system is 0.1 mm.