Neles™ butterfly valve, series BW

Problem solver for high pressure applications

Neles BW series metal seated double eccentric disc valve is designed for both control and tight shut-off in severe service. Multiple seat options makes it well suited for the refining, power, petrochemical and chemical industries. The BW series provides extended operational life in high cycle, high temperature and abrasive applications.

Low cost of ownership

Minimized pressure loss and energy costs of the process

Consistent performance even in the most difficult, changing process conditions

Shortest possible maintenance hours

Features

Solid metal seat design, based on metal-to-metal contact.
No resilient components needed for tightness
Excellent control and on-off capabilities
Design according to API 609 and ASME B16.34
Low emissions according to ISO 15848
Certified safety performance, capable to SIL 3 level according to IEC61508
Mounting face according to ISO 5211
Extremely wide temperature range up to +470 °C / +880 °F
Fire safe certification according to API 607, 6th edition
Wide rangeability in services with low pressure drop
Two piece shaft design
Industry best valve capacity
In-built thermal and pressure compensation
Heavy-duty stem and bearings design extends service life and is insensitive to thermal cycles and impurities
Industry smallest operational torque resulting in cost efficient valve package
On site interchangeable seat can be replaced without disassembling the disc and shaft. No adjustment or special tools needed

Applications

Chemical processes
Refinery
Petrochemical
Off-shore
Steel mills gas services
Natural gas
Power generation
Fertilizers

Specifications

Body constructions:	Flanged short and long pattern
	Lug and wafer design
	Butt weld ends
Body pressure rating:	PN 63 - 400 / ASME Class 600 - 2500
Seat design:	Single U-type metal seat
Size range:	DN 100 - 1600 / 4" - 64"
Temparature:	-200 to +470 °C / -320 to +880 °F

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