Bidirectional Knife Gate Valve Series 770 Bray International

Bidirectional Knife Gate Valve

Series 770

Size Range
2 - 24" (50 - 600mm)
Pressure Ratings
150psi (10bar) CWP
Body Style
Wafer, Two-Piece Bolted


Bidirectional Knife Gate Valve - Series 770

Size Range
2 - 24" (50 - 600mm)
Body Materials
Ductile Iron, CF8, CF8M, CF3M, WCB
Pressure Ratings
150psi (10bar) CWP
Stem Materials
Body Style
Wafer, Two-Piece Bolted
Gate Materials
304, 316, 317, SAF 2507, SAF 2205,17-4PH, Hastelloy® C, Monel®
Seat Material Temperature Range
EPDM: -65° to 248°F (-54° to 120°C)
Design Standard
Manufacturer Standard
Packing Maximum Temperature
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 SP-151
Canadian CRN
Face to Face
Actuator Options
Handwheel, Bevel Gear, Pneumatic, Hydraulic, Electric

Features & Benefits

The Bray Series 770 bidirectional o-ported knife gate valve is designed for severe service applications. The 770’s o-ported gate is in constant contact with the seats, minimizing seat stress and ensuring maximum sealing performance.

The durable ductile iron body is offered in a compact wafer style. When fully open, the valve is full bore, offering no resistance to line media.

    Bidirectional Knife Gate Valve Series 770 Features

    • A. Topworks

      Designed for easy, quick conversion between manual and pneumatic actuation. Featuring a lubricant injection port for continuous, smooth operation with minimal maintenance.*

    • B. Packing

      Multi-layer square packing provides exceptional gland sealing.

    • C. Seat

      Replaceable steel reinforced, elastomer seat ensures bi-directional zero leakage shutoff.

    • D. Seat Contact

      Seats are in constant contact with gate throughout the entire stroke of the valve.

    • E. Gate

      Deflection resistant gate design ensures consistent alignment for industry leading durability.

    • F. O-Port

      The inherent design of the o-ported slide gate provides 360˚ scale-breaking.

    • G. Body

      Compact wafer body allows for easy installation and is drilled and tapped to ASME CL150 flange patterns as standard. Other drilling options available upon request.

    • H. Tapped Flush Port

      Non-discharging body design includes tapped flush ports as standard, allowing for safe discharge of media and easy flush water connection.

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