Bidirectional Knife Gate Valve Series 755

Bidirectional Knife Gate Valve

Series 755

Size Range
NPS 2 to 24 / DN 60 to 600
Maximum Allowable Operating Pressure
240psi (16bar)
Body Style
Wafer, Two-Piece Bolted


Bidirectional Knife Gate Valve - Series 755

Size Range
NPS 2 to 24 / DN 60 to 600
Body Materials
Ductile Iron, Carbon Steel (WCB) CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel
Maximum Allowable Operating Pressure
240psi (16bar)
Stem Materials
304 Stainless Steel
Body Style
Wafer, Two-Piece Bolted
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)
Design Standard
Packing Maximum Temperature
PTFE/Buna-N: 194°F (90°C)
PTFE/Viton®: 392°F (200°C)
PTFE/EPDM: 248°F (120°C)
Testing Standard
Liner Maximum Temperature
176°F (80°C)
Face to Face
Actuator Options
Handwheel, Bevel Gear, Pneumatic, Hydraulic, Electric

Features & Benefits

The Bray Series 755 Bidirectional Knife Gate Valve is engineered to excel in managing abrasive and corrosive slurries across diverse applications, focusing on performance and reliability. Its design and robust construction set a new standard for efficiency and durability in industrial environments.

Featuring a robust two-piece bolted body configuration, the Series 755 valve ensures structural integrity and simplifies maintenance procedures, enhancing operational efficiency. Similar to the Series 752, the valve utilizes a steel-reinforced molded perimeter seat to achieve zero-leakage bidirectional closure.

With sizes ranging from 2" to 24" (50 - 600 mm), the 755 Series offers flexibility to address various application demands. It effortlessly withstands high-pressure environments with pressure rating up to 240 psi (16 bar).

To meet specific application requirements, the 755 Series knife gate valve offers a variety of body material options, including CF3M stainless steel, SAF 2205 Duplex, and SAF 2507 Duplex for use in corrosive applications. Furthermore, the Series 755 knife gate valve features a field-replaceable polyurethane bore liner, enhancing performance and providing a cost-effective solution for abrasive applications.



  • 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
  • Unrestricted flow path with minimal pressure drop achieved through full port valve design
  • Replaceable steel reinforced elastomer perimeter seat ensures bidirectional zero leakage shutoff
  • Two piece bolted body for easy maintenance and seat replacement
  • Polyurethane liner bonded to both halves of the body (755P) completely protects valve body from media
  • Polyurethane bore liner provides total protection from abrasive media

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