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Series 740

Bidirectional Knife Gate Valve


Size Range

NPS 2 to 36 / DN 50 to 900

Maximum Allowable Operating Pressure

NPS 2 to 24: 150psi / DN 50 to 600: 10bar
NPS 30 to 36: 100psi / DN 750 to 900: 7bar

Body Style

Single Piece, Lug

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)

Packing Maximum Temperature

PTFE: 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)


ATEX, AWWA C520 (2019), CRN, PED, PE(S)R, TR CU, UA TR

Actuator Options

Handwheel, Bevel Gear, Pneumatic, Hydraulic, Electric

Body Materials

Carbon Steel (WCB), CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel, SAF 2205, SAF 2507

Stem Materials

304 Stainless Steel

Gate Materials

304, 316, 317 Stainless Steel, SAF 2507, SAF 2205,17-4PH, Hastelloy® C, Monel®

Design Standard


Features & Benefits

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.


  • Designed for easy, quick conversion between manual and pneumatic actuation. Featuring a lubricant injection port for continuous, smooth operation with minimal maintenance.
  • Clevis design and horizontal bolting stabilizes gate ensuring proper alignment.
  • Standard multi-layer square packing provides exceptional gland sealing.
  • Optional energized quad seal packing for enhanced gland sealing.
  • Wiper/Anti Extrusion Ring minimizes the gap between the body and the gate
  • Unrestricted flow path with minimal pressure drop achieved through full port valve design
  • Deflection resistant gate design ensures consistent alignment for industry leading durability
  • Replaceable flexible wire reinforced elastomer seat ensures bidirectional zero leakage shutoff