Unidirectional Knife Gate Valve

Series 940

Certified Unidirectional Valve with Exceptional Sealing and Optimal Productivity

2025_940_KnifeGate_HomeHero_30000

Standard and Quad Seal Packing for Exceptional Gland Sealing

Customizable Unidirectional Valve for Optimal Sealing

The Bray Series 940 Unidirectional Knife Gate Valve, it is designed with a single-piece cast body design. It is available with integral metal or replaceable soft seats, allowing for customization based on specific application requirements. The valve is easily automated for on/off applications, enhancing operational efficiency. Whether you are dealing with abrasive materials or corrosive substances, this valve delivers optimal performance. From wastewater treatment plants to mining operations.With integration into automated systems, this valve streamlines operations and reduces the need for manual intervention, minimizing downtime and optimizing productivity. Each valve undergoes testing procedures including shell and seat tests as per MSS SP-151, along with factory cycle tests.

Specifications

Size Range
NPS 2 to 24 / DN 50 to 600
Body Materials
Carbon Steel (WCB), CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel, SAF 2205 Duplex, SAF 2507 Duplex
Maximum Allowable Operating Pressure
150psi (10bar)
Stem Materials
304 Stainless Steel
Body Style
Single Piece, Wafer, Lug
Gate Materials
304 - 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)
PTFE/Viton Back-up Ring: -235 to 392°F (-148 to 200°C)
Design Standard
MSS SP81
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)
Testing Standard
MSS SP151
Certifications
AWWA C520 (2019), ATEX, CRN, PED, PE(S)R, TR CU, UA TR
Face to Face
MSS SP81
Actuator Options
Handwheel, Bevel Gear, Pneumatic, Hydraulic, Electric
applications
Power, Mining, Pulp & Paper, Cement, Carbon Black, Chemical

Downloads

Sales Data Sheet
Unidirectional Knife Gate Valves Deflection Cones

Product Brochure
Series 940 Unidirectional Knife Gate Valve

Product Brochure
Knife Gate And Slurry Valves Product Guide

IOM Manual
Series 940 Unidirectional Knife Gate Valve

Recommended Specs
Series 940 Unidirectional Knife Gate Valve

More Details

Features & Benefits

  • 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
  • Standard integral metal seat with optional replaceable Class IV metal or Class VI resilient seats
  • Deflection resistant gate design ensures consistent alignment for industry leading durability
  • Unique body design with no dead pockets enables self-draining of valve
  • Lugged body suitable for all mounting orientations including dead-end service
Unidirectional Knife Gate Valve Series 941 Bray International

  • A - Topworks

    Topworks designed for easy, quick conversion between manual and pneumatic actuation. Manual valves include a lubricant injection port for continuous, smooth operation with minimal maintenance.

  • B - Clevis

    Clevis design and horizontal bolting stabilizes gate ensuring proper alignment.

  • C - Packing

    Standard multi-layer square packing provides exceptional gland sealing.

  • D - Energized Quad Seal Packing (Optional)

    Optional energized quad seal packing for additional leak prevention.

  • E - Integral Metal Seat

    Standard integral metal seat and optional replaceable zero leakage resilient seats.

  • F - Gate

    Gate design ensures consistent alignment throughout the length of the stroke.

  • G - Body

    Unique body design with no dead pockets enables self-draining of valve.

  • H - Lugged Body

    Lugged body suitable for all mounting orientations including dead-end service.

  • I - Cast Yoke Superstructure

    Cast yoke superstructure ensures robustness in valve design for different operators/orientation.

Our Portfolio

Looking for More Solutions?

Discover Our Range of Products Built for Your Industry's Challenges

Contact Us

Request A Quote