Resilient Seated Butterfly Valve 3W/3L Series Product View
1 / 3

Resilient Seated Butterfly Valve Series 3W/3L

Bray 3W/3L series resilient seated butterfly valves are designed for automation-ready performance in high cycle applications, featuring a one-piece body with a molded resilient seat for long-term bubble-tight sealing and reliable shut-off.

Request Quote Downloads

  • Genuine product assurance

    We can help verify product data and purchasing details.

  • Model confirmation

    Confirm model, connection and key options before ordering.

  • After-sales support

    After-sales communication support is provided according to the order agreement.

Product Overview

Ensuring bubble-tight sealing for corrosive and industrial media, guaranteeing reliable shut-off

3W/3L Series Resilient Butterfly Valve for Global Industrial Applications

The Bray 3W/3L series is a resilient seated butterfly valve designed for automation-ready performance in high cycle applications. Its one-piece body with a molded resilient seat ensures pressure stability and long-term bubble-tight sealing, even under demanding piping conditions.
3W/3L valve features:

  • ISO 5211 compliant top flange for direct actuator mounting.
  • One-piece disc and stem design reduces hysteresis and improves control precision.
  • Teardrop-shaped flange sealing for consistent and secure mating with various flange types.
  • Lug body design supports dead-end installation for greater flexibility.
    The 3W/3L series valves have a temperature range of -20°F to 250°F (-29°C to 121°C) and are compatible with BUNA-N and EPDM elastomers, stainless steel or nylon-coated discs, trusted in HVAC, desalination, steam, sour gas, and vacuum applications. With Bray’s global support and automation solutions, it provides cost-effective and reliable isolation for industries worldwide.

Technical Specifications

ItemParameter
Size RangeNPS 2 - 24, DN50 - DN600
Body MaterialCast Iron, Ductile Iron
Temperature Range-20°F to 250°F (-29°C to 121°C)
Stem MaterialStainless Steel
Maximum Allowable Operating PressureUp to 250 psi (17.2 Bar)
Seat MaterialEPDM, BUNA-N
Seat ClassBidirectional Bubble-tight
Design StandardAPI 609, Category A, EN 593, MSS SP-67
Flange DrillingAPI 609, Category A, ASME B16.1 Class 125, ASME B16.5 Class 150, AS 2129 Tables D and E, EN 1092 PN6, PN10, PN16, JIS 10K
Testing StandardAPI 598, ISO 5208, EN 12266-1, MSS SP-61
CertificationABS Type Approval, CE/PED, CRN, FDA, ANSI/NSF 372, ANSI/NSF-61
Face-to-FaceAPI 609 Category A, EN 558 20 Series
Body TypeWafer 3W, Lug 3L
Disc MaterialNylon 11 Coated Ductile Iron, Stainless Steel
ApplicationPotable Water, Wastewater, Seawater, HVAC, Data Centers, Sugar and Ethanol

Features and Benefits

A Molded-in Seat

Tightly controlled molding process produces accurate and repeatable dimensions, which leads to consistently lower torques over the valve’s lifetime.

B Profiled Disc

Precision-machined disc sealing edge extends valve life by reducing wear during disc-to-seat contact when sealing.

C Reliable Flange Sealing

Teardrop-shaped seat surface provides tight sealing with various industrial flanges.

D End of Line Capability

Lug-style valves can seal at full rated pressure even when the downstream flange is removed.

E Upper and Lower Stem Bearings

Reduce operating torque and increase reliability in high cycle applications.

FAQ

How does the Bray 3W/3L series resilient seated butterfly valve achieve bidirectional bubble-tight sealing?

This series uses a molded-in vulcanized resilient seat combined with a precision-machined disc sealing edge to achieve bidirectional bubble-tight sealing. The molded seat maintains stable dimensions and lower operating torque. The disc sealing edge reduces wear against the seat during opening and closing, helping maintain long-term shut-off reliability.

How to choose between the 3W wafer and 3L lug body styles?

The 3W is a wafer-style body suitable for conventional pipeline clamping connections. The 3L is a lug-style body supporting dead-end installation. The 3L lug design can maintain sealing at full rated pressure even after the downstream flange is removed. Specific model selection should consider the pipeline connection method, whether dead-end maintenance is needed, and actual application conditions.

What pressure, temperature, and size ranges are applicable for the 3W/3L series butterfly valve?

This series covers NPS 2 to 24 / DN 50 to DN 600, with a maximum allowable operating pressure of up to 250 psi (17.2 bar) and an operating temperature range of -29°C to 121°C. Actual selection should also consider seat material, media characteristics, pipeline standards, and operating pressure and temperature.

What actuators can this series accommodate, and is it suitable for high-cycle automated operation?

The 3W/3L series top flange conforms to ISO 5211, allowing direct actuator mounting for easy automation. The disc and stem feature a one-piece design that reduces hysteresis and improves control precision. Upper and lower stem bearings help reduce operating torque in high-cycle applications and improve operational reliability.

What configuration aspects should be considered when selecting for potable water, seawater, or HVAC systems?

Focus on verifying the compatibility of seat and disc materials with the media and temperature conditions. This series offers EPDM or BUNA-N seats, and nylon 11 coated ductile iron or stainless steel discs. Applications include potable water, wastewater, seawater, HVAC, data centers, sugar, and ethanol. Also verify the required flange drilling standard, face-to-face dimensions, and certification requirements.

Documents

Brochure-Bray® Pacific - Resilient Seated Butterfly Valve 3W/3L SeriesProduct information · EnglishIOM Manual-Resilient Seated Butterfly Valve 3W/3L SeriesManual · EnglishIOM Manual-Vannes Papillon à Siège Élastomère Séries 3W/3LManual · EnglishIOM Manual-Weichdichtende Absperrklappen Serie 3W/3LManual · EnglishTechnical Sales Manual-Vannes Papillon À Siège Élastomère Séries 3W/3LManual · EnglishTechnical Sales Manual-Weichdichtende Absperrklappen Series 3W/3LManual · EnglishTechnical Sales Manual-Válvulas Borboleta de Sede Resiliente Série 3W/3LManual · EnglishTechnical Sales Manual-Válvula Mariposa con Asiento Resiliente Serie 3W/3LManual · EnglishTechnical Sales Manual-Resilient Seated Butterfly Valve 3W/3L SeriesManual · ChineseTechnical Sales Manual-Resilient Seated Butterfly Valve 3W/3L SeriesManual · EnglishTechnical Sales Manual-Vannes Papillon À Siège Élastomère Séries 3W/3LManual · EnglishSales Data Sheet-Resilient Seated Butterfly Valve 3W/3L SeriesProduct information · EnglishTechnical Sales Manual-Weichdichtende Absperrklappen Series 3W/3LManual · EnglishRecommended Specification-3W/3L Series Resilient Seated Butterfly ValveProduct information · English

Contact Us

Send model, duty, or sourcing request. We will respond with next step.

Full Contact Page