Bray’s Semi-lugged and fully lugged & tapped butterfly valves with resilient seats are engineered for reliable performance. As well as double offset and triple offset high performance butterfly valves that are designed for the most demanding of applications. Bray’s Series 19 segmented ball valves combine the shearing action typically found in knife gate valves with the control characteristics and sealing performance found in ball valves.
Bray’s Series 30 valve is a wafer version with flange locating holes, and the Series 31 is the companion lugged and tapped version for dead-end service and other flange requirements. All Bray valves are tested to 110% of full pressure rating before shipment.
A major design advantage of Bray valve product lines is international compatibility. The same valve is compatible with most world flange standards. Contact us if you have any questions or queries.
Bray Resilient Seated Butterfly Valve Series 30 – Wafer Pattern
Bray Resilient Seated Butterfly Valve Series 31 – Lugged & Tapped
| Size Range: | 2” to 20” / DN50 to DN500. |
|---|---|
| Temperature Range: | -29°C to 204°C (-20°F to 400°F). |
| Maximum Allowable Operating Pressure: | 175 psi (12 Bar) DN50 2” to DN300 12” 150 psi (10 Bar) DN350mm 14” to 500mm 20” 49 psi (3.4 Bar) with under-cut disc. |
| Flange Drilling: | ASME B16.1 Class 125, ASME B16.5 Class 150, EN 1092 PN 10, 16, BS10 Tables D & E. |
| Shut-off Rating: | Bi-directional Bubble-tight. |
| Design Standard: | MSS SP-67, API 609, Category A. |
| Testing Standard: | MSS SP-61, API 598, EN 12266-1. |
| Certifications: | ABS, ATEX, Bureau Veritas, CRN, DNV, FDA 21 CFR 177.1550, NSF 61/372, PED, PE(S)R. |
| Face to Face: | MSS SP-67, API 609, Category A, EN 558 |
| Body Materials: | Cast Iron, Ductile Iron, Carbon Steel, Aluminium. |
| Disc Materials: | Nylon 11 Coated Ductile Iron, Aluminium Bronze, Stainless Steel, Hastelloy®, Halar® Coated Ductile Iron |
| Seat Materials: | BUNA-N, EPDM, FKM, Polyurethane |
The Bray valve bodies are supplied with a polyester coating, providing excellent corrosion and wear resistance to the valve’s surface. The Bray polyester coating is a hard, gloss red finish.
Chemical resistance – resists a broad range of chemicals including: dilute aqueous acids and alkalies, petroleum solvents, alcohols, greases and oils. Offers outstanding resistance to humidity and water. Weatherability – outdoor tested resistant to ultra-violet radiation. Abrasion Resistance – excellent resistance to abrasion. Impact resistance – withstands impact without chipping or cracking.
Bray’s Series 30/31 has a through-stem direct drive double ‘D’ design requiring no disc screws or pins to connect stem to disc with no possible leak paths in disc/stem connection.
The valve stem is mechanically retained in the valves body neck and no part of the valves stem or body is exposed to the line media and is equipped with non-corrosive bushing and self-adjusting stem seal.
Optionally available for valve bodies where outstanding protection and performance is needed. A thermoplastic produced from vegetable base; this coating is inert to fungus growth and moulds. Nylon 11 is USDA approved, as well as certified to ANSI/NSF 61 for water service. Corrosion Resistance – superior resistance to a broad range of chemical environments. Salt spray tested in excess of 2,000 hours and seawater immersion tested for over 10 years without corrosion to metal substrates. Nylon 11 features a very low coefficient of friction and excellent resistance to impact and ultra-violet radiation.
The tongue and groove seat design with primary hub seal and a moulded O-ring is suitable for weld-neck and slip-on flanges. The seat totally encapsulates the body with no flange gaskets required.
The disc is spherically machined with a hand polished disc edge and hub for minimum torque and maximum sealing capability.
The many Bray features minimize wear and maintenance requirements. No routine lubrication is required. All components – stem, disc, seat, bushing, stem seal etc., are field replaceable, no adjustment is needed.
Have a technical question about our products or need help finding the right solution for your application? Our experienced team is here to help. Fill in the enquiry box with your question or query, or call us below.
