Engineering sealsfor reliability in the extreme

A Company at the forefront of technology

ExperienceSince the 1920’s the Company has spe-cialised in the design and manufactureof heat resisting wrought alloy sealingrings and associated products, combin-ing technology with innovation toachieve world class quality and preci-sion.

Cross engineers have pioneered anddeveloped techniques and equipmentdesigned to form wire and rod materialsinto rings with sections and gap config-urations that could not have previouslybeen successfully achieved. Our teamof enthusiastic engineers performs acontinuous programme of research anddevelopment into new techniques, build-ing on the experience of many years.

Comprehensive in-house heat treatment,surface treatment and non-destructivetesting facilities enable Cross to offer acomplete service with the most stringentquality control at all stages. Consistentlyhigh standards are guaranteed by theuse of statistical process control tech-niques from the raw material stagethrough to finished product.

The Company owns two modern fac-tories at Bath and Devizes in the westof England. Currently there is a totalworking area of over 150,000 sq.ft.and the Company owns land at bothsites to increase this considerably ifneeded. Well over 200 people areemployed and there is an immensepool of specialist skill at all levels inthe workforce.

Environment

It is the Company’s policy tocontinually improve the environ-mental awareness of itsprocesses and procedures andto work towards accreditation tothe appropriate standards.

Research and Development

Cross pursues a policy of continuousresearch and development to meet theever-increasing demands of moderninternational industry.

Substantial test facilities and laborato-ries enable Cross engineers to constant-ly achieve improvements in product per-formance. Cross research facilities alsosupport customer development pro-grammes to ensure that competitivetechnological advantages are main-tained.

In addition to product and materialsresearch, Cross technicians also designand develop special-purpose plant andprocesses for the manufacture ofemerging new technologies.

For more than seventy years theCross Manufacturing Company hasbeen developing and manufacturinghigh quality products for applicationsdemanding accuracy and integrity.

The Company was established bythe late Roland Cross, a CharteredEngineer, who evolved a process forthe manufacture of high performancepiston rings from wire for his rotaryvalve engine. This process has beenconstantly developed and refined toprovide a wide range of quality prod-ucts.

The process has proved particularlysuitable for the manufacture of com-ponents made from cobalt and nickelbased alloys.

These alloys are used in high tem-perature conditions that are also cor-rosive. The sort of conditionsencountered in aircraft gas turbines,power generation and otheradvanced technologies.

Advanced engineering,sealing solutions

Piston sealing rings Special lock washersCross single coil spring washers aremanufactured by a special processto satisfy the standards of qualityand performance demanded by hightechnology industries including aero-space and defence equipment.

Designed and manufactured to con-sistently high standards in a widevariety of alloys to meet the mostdemanding service conditions.

Large diameter metal sealsDesigned for use in hot and difficultenvironments, diameters up to 1900mm (75”) are in regular production, with larger sizes also possible.

Cross brush seals advance the efficiencyof turbine machinery in many diverseapplications.

Offering a marked improvement overconventional labyrinth seals, brush sealsare proven to offer much reduced leak-age and longer service life, particularly inhigh temperature applications.

The brush seal consists of a ring contain-ing many thousands of heat resisting finewires, which touch the rotor, thus formingan effective barrier against flow. Thewires are arranged in such a way to bereadily deflected radially while support-ing the gas pressure in an axial direction.They are used in aerospace and largeground running turbines with shaft diam-eters up to 2000mm (80”).

Turbocharger sealing rings

Precision miniature rings provide turbineshaft sealing in car and commercial tur-bochargers. Millions of these rings aremade at our Devizes factory every year.

Cross filters are designed to filtersolid particles from liquids automati-cally, efficiently and continually withminimal loss of liquid. The filter ismade from a coil which offers a pre-cise filtration gap and can open even-ly along its length to allow 100%cleaning during every backwash. Thesystem is particularly good at remov-ing solid particles from waterpipelines. It is being used with greatsuccess on the cooling pipework ofthe Channel Tunnel.

Spiralock® wire thread inserts

The Spiralock self-locking insert fea-tures a unique thread form that main-tains bolt tension under severe vibra-tion conditions and is used in appli-cations where maximum integrity isessential such as helicopter gearbox-es and aluminium gearbox casingson underground trains.

BoltTappedHole

Brush seals

High performance liquid filters

Reliability cannot be a compromise

Cross products are found in industrialand defence industry applications wher-ever the ultimate in reliability and per-formance is essential.

Applications range from miniature high-precision seal rings in automotiveturbochargers to complex large seals for the aerospace and nuclear power industries.

The choice of materials is complex andwe offer advice based on our own expe-rience and test results for the use of dif-ferent alloys in a variety of conditions.

Typical materials held in stock include:

Nickel AlloysNimonic 75, 80A, 90, C.263Inco 600, 625, 718, X.750, 901Waspaloy

Cobalt AlloysL.605 Haynes 25

Carbon SteelsBS. S.201, S.203, S.204, S.205, S.135

Stainless SteelsDTD.734 and 189, Type 304, 316, 321,347, Nitronic 60, BS 420.S.45, DTD.326,Jethete

High Speed Steels2%, 14% and 18% Tungsten H.S.S.MI, M2

BronzePhosphor Bronze, Aluminium Bronze

Aluminium3103, 6063

Material is held in our Quality ControlledBonded Stores, each batch with appro-priate aerospace and/or proprietary cer-tificate.

Cross Manufacturing Company (1938) Ltd.

World-wide recognition

Head Office and FactoryCross Manufacturing Co. (1938) Ltd.Midford RoadBath BA2 5RR, EnglandTel: +44 (0)1225 837000Fax: +44 (0)1225 834115mail@crossmanufacturing.com

Devizes FactoryHopton Park, London Road Devizes SN10 2EYEnglandTel: +44 (0)1380 722421 Fax: +44 (0)1380 722405mail@cross–devizes.com

M5

M4

Bath Devizes

London

ABB Kent Introl

Aermacchi

Alstom – AutomationAlstom – Energy Steam TurbinesAlstom – Energy Gas TurbinesAlstom – France

BMW – RR

BNFL

Bombadier Aerospace – Short Bros plc

Borg Warner Associates 3.K WarnerBorg Warner Associates EuropeBorg Warner Associates USA

British Aerospace – AirbusBritish Aerospace – Military AircraftBritish Aerospace – Space

Cosworth Racing

Cummins Engine

Daimler-Chrysler Aerospace-MTU

Delphi Automotive

Dowty Group

Eaton S.A.

Eurotunnel

Fiat Aviazione

Flight Refuelling

GE Aircraft EnginesGE Energy Products - EuropeGE Power SystemsGE Engine Services

GKN Westland AerospaceGKN Westland Helicopters

Hitachi

Holset Engineering

Honeywell (Allied Signal)(13 aerospace and vehicle factories worldwide)

HS Marston Aerospace

IHIIHI Turbo ItalyIHI Turbo USA

ITP

Kimberley Clark

Lentern

Microturbo

MHI Equipment (Europe)MHI Automotive (Japan)MHI Power

Rolls Royce

Rolls Royce Corporation (Allison)

Siemens WestinghouseSiemens PowerSiemens Canada

Severn Trent

Sundstrand Aerospace

Senior Flexonics

Thames Water

TRW Lucas Aerospace

Turbomeca

Vickers Aerospace

Volvo Aero

Weir Pumps

Over 90% of output is exported directly or indirectly. Organisations which regularly use our products include:

Bristol

✈ ✈

www.crossmanufacturing.com

Cross Manufacturing Company recognises all registered trademarks. Publication CMR/523/3. Printed in the UK.

NATIONALACCREDITATION

OF CERTIFICATIONBODIES

LLOY

D’S

REG

ISTER QUALITY

CO

MPA

N

Y

I S O 9 0 0 2

LRQA924766

Cert. No. 924766