Product Overview
Precision-engineered valves ensure zero leakage and optimal efficiency for demanding industries
Rugged Knife Gate Valve with Resilient Seat, Tested for Reliability and Long-Term Durability
The Bray Series 740 bidirectional knife gate valve showcases advanced industrial valve technology with a rugged one-piece cast body design for optimal performance across diverse applications. Its replaceable soft seat ensures resilience, durability, and adaptability for automated processes, enabling precise open/close operation. The one-piece cast body integrates seamlessly with a flexible wire-reinforced resilient seat for bidirectional zero-leakage sealing in various industrial environments. The Series 740 is CRN certified, PED Category I Module A certified, and AWWA C520 certified, exceeding industry standards. Rigorous testing, including shell and seat tests per MSS SP-151, validates its reliability, reinforced by factory cycle tests and design compliance certificates. The mechanically and geometrically retained steel-reinforced resilient seat guarantees bidirectional zero-leakage sealing, improving operational efficiency in pulp and paper, power, wastewater, chemical, and ethanol industries. 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.
Technical Specifications
| Item | Parameter |
|---|---|
| Size Range | NPS 2 to 36 / DN 50 to 900 |
| Body Material | Carbon Steel (WCB), CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel, SAF 2205, SAF 2507 |
| Maximum Allowable Operating Pressure | NPS 2 to 24: 150psi / DN 50 to 600: 10bar NPS 30 to 36: 100psi / DN 750 to 900: 7bar |
| Stem Material | 304 Stainless Steel |
| Body Type | One-Piece, Lug |
| Gate Material | 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) |
| Design Standard | MSS SP81 |
| Gland Packing Max Temperature | PTFE: 500°F (260°C) PTFE-Impregnated: 450°F (232°C) PTFE/Buna-N: 194°F (90°C) PTFE/Viton®: 392°F (200°C) PTFE/EPDM: 248°F (120°C) |
| Test Standard | MSS SP151 |
| Certifications | ATEX, AWWA C520 (2019), CRN, PED, PE(S)R, TR CU, UA TR |
| Face-to-Face Dimension | MSS SP81 |
| Actuator Options | Handwheel, Bevel Gear, Pneumatic, Hydraulic, Electric |
| Applications | Bleach Stock Transfer, Brown Stock Washer and Pump Isolation, Evaporator Black Liquor, Pulp, Fly Ash Pneumatic Conveying Divertor Valves, RAS Return Activated Sludge, Pump and Equipment Isolation, Process Fluids, Pump and Isolation Tanks |
Features and Benefits
A Topworks
The actuator design supports simple and quick conversion between manual and pneumatic operation. Manual valves include a lubricant injection port for continuous, smooth operation with minimal maintenance.
B Clevis
The clevis design and horizontal bolt retention stabilize the gate, ensuring proper alignment.
C Gland Packing (Standard)
Standard multi-layer square packing provides superior gland sealing.
D Gland Packing (Optional)
Optional energized star-seal packing enhances gland sealing.
E Chest Liner / Anti-Extrusion Ring
Chest liner up to 12”, PTFE anti-extrusion ring for 14” and above.
F Port
Full-port valve design provides unrestricted flow path for minimal pressure drop.
G Gate
Gate design ensures consistent alignment throughout the full stroke length.
H Seat
Mechanically retained steel-reinforced resilient seat ensures bidirectional zero-leakage sealing.
I Yoke
Cast yoke superstructure ensures rugged valve design, compatible with different operators and orientations.