SERIES 3W/3L
RESILIENT SEATED BUTTERFLY VALVES
OVERVIEW SPECIFICATIONS
NPS 2 to 24
The Bray Series 3W/3L features an optimized molded- Size Range
DN 50 to 600
in seat, a profiled disc sealing edge, and stem bearings.
These features provide optimized performance and Temperature -20°F to 250°F
Range -29°C to 121°C
efficient automation solutions for a long cycle life without
compromising bubble tight sealing. High Pressure 250 psi
Disc 17.2 bar
NPS 2-12 (DN 50-300)
APPLICATIONS MEDIA Maximum 175 psi (12 bar)
Standard
Operating
> HVAC > Acids Disc NPS 14-24 (DN 350-600)
Pressure
> Chilled Water > Alkalis 150 psi (10.3 bar)
> Desalination > Corrosive Chemicals Low Pressure 50 psi
> Sour Gas (NACE) > Dry Chlorine (Gas or Liquid) Disc 3.4 bar
> Steam > Gases 3W - One-piece wafer
> Vacuum > Hydrogen Body Style
3L - One-piece lug
> Oxygen
Leakage Rate Bubble tight
> Water
Vacuum Rating 1 to 0.001 micron
FEATURES AND BENEFITS
The Series 3W/3L resilient seated butterfly valves offer:
1 MOLDED-IN SEAT: Tightly controlled molding process
produces accurate and repeatable dimensions, which
leads to consistently lower torques over the valve’s 4
lifetime.
2 PRECISION PROFILED DISC SEALING EDGE: Extends
the valve life by reducing seat wear.
3 ROBUST FLANGE SEALING: Tear-dropped shaped
seat face enables tight sealing with a wide variety of
industrial flanges.
4 ISO 5211 TOP FLANGE: Direct mounting capability
between the valve and Bray actuation reduces
package height and complexity.
5 UPPER AND LOWER STEM BEARINGS: Reduce 5
operating torque and increase reliability in high cycle
applications. 1
6 END OF LINE CAPABILITY: Lug style valve allows
for sealing at full rated pressure even when the
downstream flange is removed. 2
3
© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM EN_GBL_SDS_3W-3L_20220411 1 of 2
SERIES 3W/3L
RESILIENT SEATED BUTTERFLY VALVES
DESIGN STANDARDS EXPLODED VIEW
API 609 Category A
Valve Design EN 593
MSS SP-67
Top Flange ISO 5211
ASME B16.5 Class 125/150
EN 1092-1 PN 6 | 10 | 16
Flange Drilling
JIS 10K
AS 2129 Table D & E
API 598
EN 12266-1
Seat Tightness Test
ISO 5208
MSS SP-61
API 609
Face-to-Face
EN 558 Series 20
MATERIAL OPTIONS1
Cast Iron
Body
Ductile Iron
Nylon 11 Coated Ductile Iron
316 Stainless Steel
Disc
Aluminum Bronze
Duplex Stainless Steel 4A
416 Stainless Steel
Stem
Stainless Steel (EN 1.4057)
EPDM
Seat BUNA-N
HT-EPDM
NOTES
1
Materials available in ASME and EN grades
CERTIFICATIONS AND APPROVALS
CE/PED
Certifications
ANSI/NSF 61 & 372
EC 1935
FDA Food Contact Approved
Approvals
ABS Type Approval
Bureau Veritas Type
Additional information is available in the 3W/3L Technical
Sales Manual.
© 2021 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM EN_GBL_SDS_3W-3L_20220411 2 of 2
