Technical details

LD

S

8.27

3

Leak monitoring system

s

Leak monitoring: Checking the plan

t

Vacuum leak detector type VLR 410 PMMV Si, VLR 410/E and VLX 330/A-Ex – Checking the plant

Pos No. of component to be checked

functions well

defectiv

e

1

Vacuum pump

2

Vacuum switch

Switching levels:

VLR 410 PMMV Si and VLR 410/E / VLX 330/A-E

x

pump “o

ff” < 540 mbar / < 540 mba

r

pump “on” the level must be at least 15 mbar higher than the

switching level measured for “Alarm on”

Alarm “on” > 410 mbar / > 330 mba

r

3

Filter with non-return valv

e

tight

untigh

t

4

Screw connections: ventilation screw and three-way stopcoc

k

5

Screw connections underneath the leak detector

6

Screw connections:

fluid barriers

7

T-piece in the connection pipes – single-line system – *

8/9

All screw connections: long nipple/test valve

* also in multiple

-

line syste

m

with distributor

block

10

All screw connections: measuring branch

11

Pressure test of individual lines: surveillance space

When piping is untigh

t

12

Screw socket, inner weld seams / GRAPA

13

Screw socket, outer weld seams / GRAPA

14

Screw socket, all

fitting drill hole

s

Put into operation

yes

n

o

surveillance space – clear passa

g

existing defects rectifie

d

Plant put into operatio

n

Vacuum leak detector under sea

l

Stamp

/

Date:

Signature

:

31.03.2026 Subject to technical changes. Page 34