Bidirectional Knife Gate Valve Series 770 Bray International https://www.bray.com/images/default-source/products/knifegate/knifegate-770/vaas770cover01_01thumbnail.png?sfvrsn=c8aa1beb_4

Bidirectional Knife Gate Valve

Series 770

Size Range
NPS 2 to 24 / DN 50 to 600
Maximum Allowable Operating Pressure
150psi (10bar) CWP
Body Style
Wafer, Two-Piece Bolted

Specifications

Bidirectional Knife Gate Valve - Series 770

Size Range
NPS 2 to 24 / DN 50 to 600
Body Materials
Ductile Iron, Carbon Steel (WCB), CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel
Maximum Allowable Operating Pressure
150psi (10bar) CWP
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
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 SP151
Certifications
ATEX, CRN, TR CU
Face to Face
MSS SP81
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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