GEA T.VIS M-15, Operating Instruction

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7.8.1 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.
7.8.2 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 position detection devices for the upper and lower valve disks
change their feedback signals when the corresponding valve disk leaves the
closed position.
7.8.3 Hardware Description
1.
Three solenoid valves are installed in the control top T.VIS M-15:
1.a Solenoid valve Y1 – actuation of main valve
1.b
Solenoid valve Y2 – lifting of lower seat
1.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 a position measuring
system. The correct adjustment of the system to detect the closed position of
the lower seat is described in detail in the M/2.0 valve operating instructions
as well as in .
The sensitivity of the position measuring system is 0.1 mm.
3.
The closed position of the upper seat is detected by proximity switch S3 that
is installed externally on the lantern. The correct setting of this proximity
switch for detecting the closed position of the upper seat is described in detail
in the operating instructions of the M/2.0 valve and in Section 7.7, Page 84.
The sensitivity of the position measuring system is 0.1 mm.
7.8.4 Test Procedure 1
Step 1
The valve should be in the closed position. This position can be identified by the
green LED on the top of the control top.
Step 2
Carry out the following steps:
1. Activate the lower valve disk by activating solenoid valve Y2 via the PLC.
Start-up
Test procedure for Tuchenhagen PMO valves type M / 2.0
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15.04.2020 87