Technical details

Leak monitoring system

s

Vacuum leak detector type VLR 410 PMMV Si

Laying in one line up to max. 25 bar with additional measuring unit ZD 41

0

If the maximum monitorable length acc. to Worksheet LDS 8.120 is not su

fficient for

an individual case the additional measuring unit ZD 410 must be installed

.

Connecting the leak detector to the surveillance space

of the double-walled safety pipe (Worksheet LDS 8.213

)

The leak detector is connected as shown in the illustration in Worksheet LDS 8.213.

An additional measuring unit type ZD 410 is installed at the other end of the pip

e

using the same connection method. The additional measuring unit type ZD 410 is

electrically connected to the leak detector VLR10/E.

MA

Measuring branch

A

connection fittin

g

KP

crosspoint

FL

fluid barrier

PD

three-way stopcoc

k

ZD 410 additional measurin

g

uni

t

PB

transport pressure

in inner pipe

MV

solenoid valv

e

SL

eletric control lea

d

type NYY 3 x 1,52

S

L

ZD 41

0

shu

t

P

D

ope

n

LD

S

8.216

Max. monitorable pipe length

L max

.

SECON®-X DN 2

5

FSR 30/4

8

FSR 39/6

0

FSR 48/71

500 m

all other SEC and FSR sizes

2000 m

shut

BV

GD

open

F

L

KP

h1 < = 10 m

h max. = 3.0 m

m

a

x

.

3

.

5

m

M

A

AV

MA

AV

L max < = 500 m

FL

At a PB > 5 bar up to max. 25 bar a solenoid valve MV must

be installed between the crosspoint KP and the measurin

g

branch MA.

The solenoid valve protects the leak detector from non-

permissible high pressures. The solenoid valve is monitore

d

electronically so that a failure of the solenoid valve triggers

the alarm.

M

V

MA

A

V

31.03.2026 Subject to technical changes. Page 11