Bray – Bidirectional Knife Gate Valve – Series 740
Knife Gate Valves
Bray - Bidirectional Knife Gate Valve - Series 740

Robust Knife Gate Valve with Flexible Elastomer Seat, Tested for Reliability and Long-Term Durability

The Bray Series 740 Bidirectional Knife Gate Valve showcases advanced industrial valve technology, featuring a robust one-piece, cast body design for optimal performance across diverse applications. Its replaceable soft seat ensures resilience durability and adaptability for automated processes, facilitating precise on/off operations.The one-piece cast body seamlessly integrates with a flexible wire-reinforced elastomer seat, delivering bidirectional zero leakage shutoff in various industrial settings. With CRN accreditation, PED Category I Module A compliance, and AWWA C520 certification, the Series 740 exceeds industry standards. Rigorous testing, including shell and seat tests per MSS SP-151, validates its reliability, reinforced by factory cycle tests and a Certificate of Design Conformance.The mechanically and geometrically retained steel-reinforced elastomer seat guarantees bidirectional zero leakage shutoff, enhancing operational efficiency across industries such as Pulp & Paper, Power, Wastewater, Chemical, and Ethanol.The Bray Series 740 Knife Gate valve is known for its reliability, versatility, and superior performance, making it the preferred solution for demanding industrial applications worldwide.

Size Range
NPS 2 to 36 / DN 50 to 900
Body MaterialsCarbon Steel (WCB), CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel, SAF 2205, SAF 2507
Maximum Allowable Operating PressureNPS 2 to 24: 150psi / DN 50 to 600: 10bar
NPS 30 to 36: 100psi / DN 750 to 900: 7bar
Stem Materials304 Stainless Steel
Body StyleSingle Piece, Lug
Gate Materials304, 316, 317 Stainless Steel, SAF 2507, SAF 2205,17-4PH, Hastelloy® C, Monel®
Seat Material Temperature Range
Buna-N: -34 to 194°F (-36 to 90°C),
EPDM: -65 to 248°F (-54 to 120°C)
Viton®: -15 to 392°F (-26 to 200°C)
Design StandardMSS SP81
Packing Maximum TemperaturePTFE: 500°F (260°C),
Impregnated PTFE: 450°F (232°C),
PTFE/Buna-N: 194°F (90°C),
PTFE/Viton®: 392°F (200°C),
PTFE/EPDM: 248°F (120°C)
Testing StandardMSS SP151
CertificationsATEX, AWWA C520 (2019), CRN, PED, PE(S)R, TR CU, UA TR
Face to FaceMSS SP81
Actuator OptionsHandwheel, Bevel Gear, Pneumatic, Hydraulic, Electric
ApplicationsBleach Stock, Brown Stock Washers Pump Isolation, Evaporators Black Liquor, Paper Stock, Fly Ash Pneumatic Conveyance Crossover Valve, RAS Return Activated Sludge, Pump & Equipment Isolation, Process Fluids, Pump & Isolation Tank