Transcript

Seal material approved drinking

for

Novus 34, the non-asbestos sheet

sealing material from Dutch

Royal Econosto Group’s

subsidiary, Econosto Ltd, has

been approved for use in potable

water applications in the UK.

This British Water Byelaw Scheme

certification means that the gasket

material can be used in direct contact

with both cold and hot water up to

85 “C (185 “C), making ir suitable

for both storage and heating

applications of drinking water.

Novus 34 is just one of the sheet

materials introduced as an

alternative to compressed asbestos

fibre (CAF), and incorporates a

blend of para-aramid and inorganic

fibres with special additives bound

together with a high quality nitrile

rubber. Testing has shown it to be

suitable for demanding applications

including the containment of oils,

solvents, steam, gases such as

oxygen, and now potable water

applications.

Novus 34 also meets the

requirements of BS7531 Grade X,

DIN-DVGW 96.01 e-845 and

BAM, which means it suitable for

oxygen service, where pressures up

to 160 bar (2256 psi) and

temperatures of 90 “C (194 “C) are

present.

Contact: Econosto Ltd, Hunsworth Lane,

Cleckheaton, BD19 3UJ, UK. Tel:-+44 1274 878 787; Fax: +44 1274 862 588.

New eyelet

catalogue A new brochure describing

Thermoseal In& complete range of 316 stainless steel eyelet

gaskets has been published.

The colour catalogue, entitled

“The eyelets have it,” highlights that

these eyelet gaskets are available in

tW0 non-asbestos compressed

materials, namely KLINGER@ sil C-

4433 and KLINGER@ sil C-4439.

The eyelet gaskets have improved

resistance to blowout and corrosive

chemicals and are available in the full

range of ANSI sizes. The brochure

also details the materials’ properties

such as creep relaxation, sealability,

compressibility and recovery, and hot

compression set.

The C-4433 eyelet gasket has

been designed for general purpose

and steam service, while the C-

4439 eyelet is resistant to pressure

and temperatures fluctuations Both

gasket materials conform to the

criteria of the fourth edition of the

API-607 standard.

Contact:Thermoseal Inc., 2350

Campbell Road, Sidney, OH 45365- 9573, USA. Tel: +l 937 498 2222; Fax: +I 937 498 7544.

Non-fogging foam sealing tape Gaska Tape Incorporated, based

in Indiana, USA, has added a new low out-gassing foam to its

Polymeric Series Foam Tape. The new foam is suitable for a

number of automotive gasketing

applications and satisfies the SAE

J-1756 specification for motor

products. This is a standard set by

the Society of Automotive

Engineers and is an adaptation of

the Ford fogging test. Fogging

refers to the residue left on the

inner surface of the glass in new

cars by vapours from plastics,

rubber and foam. According to the

company this latest polymeric foam

gives off significantly fewer vapours

and hence causes less fogging of the

windscreen.

Other internal applications for

the polymeric foam tape include

engine gasketing, as it can

withstand a wide temperature

range, -35 “C (-31 “F) to 116 “C

(240 “F). It is also suitable for

external automotive applications, as

it is resistant to UV light and

sunlight, as well as chemically

compatible with petrol, oil,

hydraulic fluid, brake fluid,

alcohol, anti-freeze and a number

of acids including sulphuric acid

and hydrochloric acid.

The whole range of Polymeric

Series Foam Tapes are available in a

variety of densities to suit the

apphcatlon and come with a skin

on two sides for improved bonding

to substrate materials, as well as

single or double-sided water-based

or solvent-based adhesives.

Contact: Gaska Tape Incorporated, 1810 W Lusher, Elkhart, PO Box 1968, IN 46517-I 968, USA. Tel: +I 219 294 5431; Fax: +I 219 293 4504.

Valve stem packing saves money James Walker & Co Ltd helped rectify the failure of a control valve that was causing unscheduled and highly expensive equipment

downtimes at a British-based

petrochemical plant.

At refinery facilities it is we11

accepted that it’s difficult to keep

control valves in good conditions

either due to ingress of dirt or

improper installation.

At a British petrochemical plant,

staff had experienced problems

with a level control valve on a

reactor vessel for 10 years. The

valve operated in a temperature of

30 “C (86 “F) and 45 bar pressure, James Walker supplied the plant and on average it caused an with a trial set of Kalrez@ KVSP unscheduled reactor shutdown replacement seals, which is a once a year. The cost of a shutdown chevron type of packing set, with was nearly f60 000. Therefore, the alternate rings of PFTE and Kalrez management of the plant was keen perfluoroelasromer, from DuPont to find a valve packing that offered Dow Elastomer. long term fluid sealing. Prior to The valve was refurbished, approaching James Walker for reinstalled and monitored to assistance, they had tried a determine the performance of the graphite-based stem packing set new stem packing. Thirty months that had been unsuccessful. after continuous service the control

Sealing Technology No. 69 0

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