New portable helium mass spectrometer leak detector: the lightest, most compact available

Vacuum

News

New

pump

Hot,

for gas temperatures

corrosive

gases

up to 250°C

at temperatures

up

continuously by the Brey GK07. a new vacuum/compressor pump which uses sheafed by a steel heat-srnk to protect Continuous, claimed

maintenance-free Brey for the

by

316 stainless steel and motor are self-lubricating.

carbon.

Both

Being oil-free, the GK07 is Ideal in connection with, for example, well as for general high-temperature

can

be pumped

special rotary vane an extended drive shaft the motor.

operatron which

GK07,

to 250°C

for at least IS constructed pump

and

20,000 exclusively

and

rate

vacuum available.

of the

GK07

is 15

400

mbar.

A choice

are

and

of 6. 12

maximum or 24

pressure

screwed

accessories

‘clean’ with

hose can

Stockholm

Road,

Kiekens

turbo

in design, the no projections

adaptors

are

be provided

on

Sutton

Fields

is

suction of 5.8-27.7 free of pulsation

provided

and

full

range

Industrial

Estate,

Hull

HE8

and

kPa oil

due to careful dynamic aluminium impellers, vibration.

the

Brey

Ltd.

OXW,

UK

including: cooling and

combustion industrial

and vacuum

in. Hg),

this

airflow

being

heat treatment; vacuum cleaning systems,

New portable helium detector: the lightest, new

Varian

936-40

Station

lift

Road,

and

an

uses

operation

Varran’s

patented

Contra-

Its inconvenrence of storing completely elrminated.

and

handlrng

lrqurd

nrtrogen.

has

Unlike conventronal leak detectors, where a pressure of about 10e3 mb has to be attained in the part to be tested before starnng the leak check, the 93640 can begin testing at a pressure higher

leak

whrle time

maintaining Its maximum saving. which is especially

sensitivity. important

contaminants tube.

This means in large

detection. the typical trme to evacuate a 120 I volume to with a 200 I min mechanical pump is 15 min. The can be evacuated to 0.1 mb in only about 7 min.

on

both

the

ion

source

and

24-28

the

spectrometer of

inside

access to the double filament

unit designed to minimize results, the pre-amplifier

Manor

Road,

surface

Varian Walton-on-Thames,

tube, of the

tube ion source

downtime. is kept in a Associates Surrey,

Ltd. UK

delivered

no fine internal adjustment, means operation. Also, shaft and

and free of

to

and agitation of liquids and pneumatic conveying; fluidised

6, Anerley

smgle-handle

93640

is a replaceable throw-away For accurate, repetitrve test vacuum conditron.

the

and static balancing of the steel units will run extremely quietly

aeration drying;

The

unit’s

The entire tube is demountable, permitting interior for inspection and cleaning. The

This well made and rugged machine should prove of interest original equipment manufacturers and system designers for applications powders;

time.

developed to handle air and gases and range of 6.2-38.1 kPa (0.9-5.5 psi) and

(1.742 vapour.

by the

The 93640 uses Vanan’s patented stainless steel which is heated at all times to prevent condensation

of

request.

The design of the Kiekens turbo compressor with clearances and needing minimal maintenance and that they are ideal for duties requiring continuous

hold

down

R G Jolliffe London

bed and

and Co Ltd, SE20 8PT. UK

mass spectrometer leak most compact available Helium

Mass

Spectrometer

Leak

is, according to the company, the smallest, most compact sensitivity leak detector available today. Weighing under 93640 measures 21 x 35 x 50 cm and is as portable and as a small suitcase. The unit large vacuum systems where coaters, and for on-site leak

118

with been

For example, 5 Y 1 Om3 mb same volume

pump is 200 mm long by at all over its length. Weight

compressors

These machines have been will operate in the pressure

farms.

cycle

can be detected to at least the when the system is used wrth

pump.

IS assured

than 0.1 mb, a considerable

and

R G Jolliffe and Company Limited are pleased to introduce range of multrstage centrifugal blowers and exhausters manufactured by Kiekens BV of Amsterdam.

The

of use

Helrum range

s’

FlowTM prtncrple, based on the differences In maxlmum pressure ratios produced by the unit’s diffusron pump for gases of different molecular werghts. The cryogenic trap used In other detector units.

In

analysrs work boiler flues as and gas

V dc motors

mechanical

m3/h

volume

Very compact and 45 mm in diameter, is 1.2 kg. 6 mm

I min.‘,

8.5

Shorter

h IS

chromatography. Flow

sensmve. atm cm3

Ease

permanent-magnet

for high-temperature engine exhausts gas circulatron

It IS hrghly 5 x lo-”

is ideally access checks

Detector high29 kg, the convenient

suited for detecting leaks is difficult, such as vacuum along pipelines and at tank

in A vacuum 936-40

furnace Helium

being leak

leak-checked

detector.

using

the portable

trapless

Varian