M&C TechGroup LB-1SS Operator's manual

Liquid stop LB-1PV and LB-1SS

for protecting gas analysers and gas-phase
chromatographs against liquids

LB-1PV, LB-1SS

Special Features

Sure protection against liquid inrush

Reliable removal of liquid coming
through

Also suitable for high pressures

Available in stainless steel and PVDF

Easy change of the hydrophobic
protective membrane

With wall mounting holder

Application

The M&C liquid-stop LB-1.. is suitable for
protecting analysers against inrush of liquids
out of the gas conditioning unit which is
mounted before the analyser. This avoids
major damages of the analyser.

The most useful position of the liquid stop
LB-1.. is behind the gas conditioning unit,
directly before the flowmeter of the analy­ser.

5-1.10.9

Description

The hydrophobic protective membrane of
the liquid-stop LB-1.. is placed between the
two parts of the housing which are screwed
together. It is lined with a porous glass filter
frit in order to secure stable proportions.

The pore sizes of the protective membrane
are designed in such a way that gas mole­cules and steam can pass through but liquid
molecules are retained.

The gas inlet and outlet are positioned in
an horizontal line inside the housing. The
liquid outlet shows downwards when being
mounted.

Due to the horizontal flow direction of the
gases and because possible liquids are drai­ning off on the protective membrane due to
its gravity, the leaking through of liquids to
the analyser is avoided.

Eventually occuring liquid can be let off via
a peristaltic pump SR25.1, separator and
automatic liquid drain ADS-SS or a conden­sate vessel TG1 (dip tank). The LB-1 has got a
respective connection possibility.

Changing the membrane is easy to handle.
The optimum positioning of the sealing
O-rings guarantees always a sure sealing of
both housing parts.

The filter inlet and outlet can be turned by
180° on the wall mounting holder so that a
flexible adaption to local circumstances is
possible during mountage.

10.03/11.06

M&C | TechGroup Germany GmbH
Rehhecke 79, D-40885 Ratingen

[e-mail]
www.mc-techgroup.com

Fon [phone]
Fax [phone]

1

2

5-1.10.9

M&C | TechGroup Germany GmbH

Rehhecke 79, D-40885 Ratingen

[e-mail]
www.mc-techgroup.com

Fon [phone]
Fax [phone]

Dimensions

Dimensions in mm

1 Upper part of housing
2 Lower part of housing
3 Holding angle
4 Glass filter frit
5 Hydrophobic protective membrane
6 Flat ring of Teflon
7 O-ring FPM
8 O-ring FPM

Technical Data

Liquid-stop LB-1PV LB-1SS

Part No. 03F4005 03F4000

Gas flow max. 200 Nl/h

Gas pressure 0,3-2 bar abs.

∆P max. 0,5 bar

Differential pressure with clean
protection membrane, medium air, 20°C

Temperature sample gas max. +80 °C max. +100 °C

Ambient temperature 0 °C to +60 °C

Storage temperature -25 °C to +80 °C

Stagnant space 4 ml

Material of gas bearing parts PVDF, FPM, PTFE, Polyester, glass 1.4571, FPM, PTFE, Polyester, glass

Sample gas / drain connections NPT 1/8"i DIN ISO 228/1

Mounting / weight wall mounting / approx. 0,3 kg

50 100 mbar
100 200 Nl/hr

0,3 -10 bar abs.
∆P max. 0,5 bar

Examples for application

1 Gas cooler
2 Liquid-stop LB-1
4 Liquid drain with peristaltic pump SR25.1
5 Gas sample pump
6 Seperator and automatic liquid drain ADS-SS

Upper part of housing

Lower part of housing

O-ring FPM

Glass filter frit

Flat-ring PTFE

Hydrophobic
protective membrane

Glass fibre surface
to be layed onto
glass filter frit

Attention: Do not touch on
the protective membrane!

O-Ring

Smooth side

Mounting bracket
Part No.:90F4010

Part No.:90F4005

Part No.:90F3515

Part No.:90F3510

Part No.:90F4000

Part No.:90F3520

Part No.:90F3525

Part No.:90F4020

Connection of the gas sample line

The connections (3 x 1/8”NPT i) for the gas sample lines are marked on the type plate and in the above drawing. They are executed with
respective screw fittings (see also data sheet 7-1.1) which are screwed gastight into the LB-1 with the aid of PTFE tape.

Changing the protection membrane

In case the hydrophobic protection membrane is dirty or overflowed so that the required flowrate is too short, it is advisable to exchange the
protective membrane incl. glass frit, PTFE flat ring and Viton O-ring (set I of spare parts, Part-No. 90F3530).

In case of interruption of the flow, the system has to be checked immediately!
During mountage attention must be paid to absolute cleanliness because impurities may impair the function of the LB-1!
By touching the surface with your hand, the protection membrane will be destroyed!

Aggressive condensate possible. Wear safety glasses and protective clothes!

For changing the protective membrane, unscrew the lower part of the liquid stop with the aid of an open-jawed spanner SW17. After this,
take out the O-rings and the glass frit, clean the housing parts and remount the LB-1 as shown below.

For a perfect function it is necessary that the protective membrane is positioned with its surface with fibre glass structure

onto the flat side of the glass frit! When changing the O-ring on the upper part of the LB-1 (Part-No. 90F4020), it is important
to draw up and not to roll up the O-ring. This way, a twisting and a respective leakage are avoided.

Part No. Description

90F4020 FPM O-ring for upper part LB-1

90F3515 FPM O-ring for CLF-5, CG-2 und LB-1

90F3525 PTFE flat ring for CLF-5 and LB-1

90F3510 Hydrophobic protective membrane for CLF-5 and LB-1

90F3520 Glass filter frit for CLF-5 and LB-1

90F4030 Spare part set LB-1 consisting of glass filter frit, protective membrane, flat ring PTFE, O-rings FPM

Recommended spare parts

Spare part set I Part No. 90F4030
including:

Protective membrane Part No. 90F3510
Glass filter frit Part No. 90F3520
Flat-ring PTFE Part No. 90F3525
O-ring FPM Part No. 90F3515
O-ring FPM Part No. 90F4020

5-1.10.9

M&C | TechGroup Germany GmbH

Rehhecke 79, D-40885 Ratingen

[e-mail]
www.mc-techgroup.com

Fon [phone]
Fax [phone]

3