Va l ve s fo r H a z a rd o u s A p p l i c a t i o n s VALVE SOLUTIONS FOR NUCLEAR FUEL PRODUCTION For UF6 production, conversion, enrichment Gas and liquid, A-HF, fluorine, UF6, UO2F2, DU, ClF3, A-HCl, Cl2,... Va l ve s fo r H a z a rd o u s A p p l i c a t i o n s MODEL 2100-2500 - SERIES 4025 9 1 2 3 4 6 8 7 5 11 10 S ER IE S 4 0 2 5, VA LV E S OL U TI O N S EASE OF OPERATION 1 • Large diameter, long lasting heavy duty handwheel 2 • Yoke bushing with needle bearings and lubrication fittings 3 • One piece, non rotating stem - cold rolled for concentricity and polished to ensure packing integrity and smooth operation • Position indicator - torsion limiter 4 • Optional locking device ZERO EMISSION Stem sealing integrity • Stem sealed by multiwall hydroformed bellows 5 • Bellows - “exposed to the flow” (model 2500) for self cleaning in case of fluid crystallization or “fully housed” design (model 2100) for protection against erosion 6 • Secondary stem packing - additional stuffing box for secondary sealing to the atmosphere 7 • Backseat - between stem and bonnet Body/bonnet seal integrity • Dual sealing - fully entrapped, double tongue and groove gasket with leak detection port to ensure joint integrity : continuous monitoring on the first gasket with sealing on the second gasket in case of failure, until scheduled shut-down 8 • Sealing technology - according to service conditions and customer requirements : Kammprofile, Gylon® PTFE, Helicofllex®, metal seals,… • Welded lips - in option for ultimate guarantee Leak detection • Detection port - monitoring bellows stem seal and body/bonnet gasket, either simultaneously or independently 9 • Continuous monitoring - when connected to a detection device • Piping flange connections - leak detection monitoring option also available Shell integrity 10 • Forged body and bonnet or • Casting - high quality Level 2 castings, as per ASTM E446 ZERO SEAT LEAKAGE • Integral or screwed-in body seat 11 • Soft seating - Tenic 255 (PTFE+Nickel), provides perfect tightness for gaseous applications or • Hard seating - stellited seat with knife effect edge to cut through solid impurities A zero emission bellows sealed globe valve for the hazardous applications of the nuclear industry F O R N UC LE AR F U E L P RODU CTIO N DESIGN, INSPECTION AND QUALITY CONTROL descote products are designed in accordance with national and international standards such as ASME III, RCC-M,... descote production procedure and quality programs include all necessary controls, destructive and non-destructive testing to meet customers requirements, i.e. : PMI, X-ray, magnetic particle examination, dye-pen control, ... Quality programs ensure full compliance with 10 CFR 50 Appendix B, 10 CFR 21, ISO 9001,... B E L L O W S T O E L I M I N AT E F U G I T I V E E M I S S I O N S A metal bellows welded to the stem and bonnet provides a continuous metallic barrier between the process fluid and the atmosphere to achieve zero emissions. For added security there is also a stuffing box for a secondary sealing and a backseat between the stem and bonnet. The bellows are multi walled, hydroformed and can be guaranteed from 5 000 up to 20 000 full O/C cycles at the maximum design pressure for the valve. Bellows can be up to 100 000 cycles for on-off and control valves. M AT E R I A L S E L E C T I O N Material selection if of upmost importance for the valve reliability & integrity. Materials are always selected according to actual service conditions (fluid, temperature, pressure, etc…) and environmental circumstances to ensure optimum valve life. Series 4025 valves can be manufactured in a wide range of materials including : carbon steel, low temperature carbon steel, stainless steel (304L, 316L,…), Monel®, Inconel®, Hastelloy®, Nickel… PRESSURE TESTS & SEISMIC TESTING Series 4025 valves are tested according to international standards. In addition, we perform • 100% HP gas closure seat test with bubble tight acceptance criteria for 2 minutes minimum duration • Soft seating Tenic 255 : Helium mass spectrometer seat test up to 10-8 atm.cm3.s-1 • Hard seating : Helium mass spectrometer seat test up to 10-6 atm.cm3.s-1 Series 4025 are calculated and designed to resist seismic events specified by customer. Actual testing on vibrating tables can be performed to ensure the valve integrity and safety functions. C E R T I F I C AT E A N D T R A C E A B I L I T Y descote applies the ISO 9001 standard to the complete production process. This procedure systematically includes: • The unique identification number engraved on each valve • 3.1 certificates for traceability of materials, tests, examinations and controls. A unique identification number provides complete traceability for the lifetime of each valve. Va l ve s fo r H a z a rd o u s A p p l i c a t i o n s ADDITIONAL RANGE Series 4025 can be delivered with pneumatic or electrical actuation. It is also available in remote control version. Pneumatic actuated valve Electric actuated valve Control valve with positioner Instrumentation bellows sealed globe valve PRODUCTION RANGE Series 4025 can be delivered to the following dimensions and ratings DIMENSIONS RATING CONNECTIONS From DN8 to DN500 – ¼" to 20" ISO PN6 to PN250 - ASME Class 150 to 2500 Flange, BW, SW… C E R T I F I C AT I O N S The entire cycle of calculation – design analysis – research – prototype – tests – qualification – industrial manufacturing is covered by our ISO 9001 and NQA-1 quality programme. Series 4025 on-off and control valves are certified SIL 3 Capable according to IEC 61508-2010 edition and can thus be used in safety loops without redundancy. R & D –ENGINEERING Due to its extensive experience in the nuclear field, descote can provide real solutions for the industry. Our dedicated technical team can answer any type of specifications and manage the development of products adapted to the very specific requirements of our nuclear industry customers. S O M E O F O U R M O S T VA L U E D C U S T O M E R S AREVA NC, BNFL, COMURHEX, FBFC, GE Hitachi Nuclear, HONEYWELL, KNFC, SPRINGFIELD FUELS, URENCO, WESTINGHOUSE... Va l ve s fo r H a z a rd o u s A p p l i c a t i o n s WHAT DESERVES TO BE DONE DESERVES TO BE WELL DONE descote s.a.s - 9 avenue Jean Jaurès - 69320 Feyzin - France - Phone: +33 (0)4 72 89 25 00 - Fax: +33 (0)4 72 89 25 25 - E-mail: info@descote.com Capital : 2 655 000 euros - SIRET 302 046 586 00046 - TVA FR 11 302 046 586 www.descote.com DEFNB-0023-EN-1604
