Bray – Unidirectional Knife Gate Valve – Series 940
Knife Gate Valves
Bray - Unidirectional Knife Gate Valve - Series 940

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.

Size Range
NPS 2 to 24 / DN 50 to 600
Body MaterialsCarbon Steel (WCB), CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel, SAF 2205 Duplex, SAF 2507 Duplex
Maximum Allowable Operating Pressure150psi (10bar)
Stem Materials304 Stainless Steel
Body StyleSingle Piece, Wafer, 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)
PTFE/Viton Back-up Ring: -235 to 392°F (-148 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
CertificationsAWWA C520 (2019), ATEX, CRN, PED, PE(S)R, TR CU, UA TR
Face to FaceMSS SP81
Actuator OptionsHandwheel, Bevel Gear, Pneumatic, Hydraulic, Electric
ApplicationsPower, Mining, Pulp & Paper, Cement, Carbon Black, Chemical