The Bray Series 768 heavy-duty slurry bidirectional knife gate valve features a two-piece bolted wafer body and dual elastomer sleeve seals, with sizes ranging from NPS 2 to 24 (DN 50 to 600). The body is available in ductile iron, carbon steel, or stainless steel, while the gate is offered in a range of stainless steel and corrosion-resistant alloy materials. It is designed for pipeline isolation in HPAL, POX hydrometallurgical, and chemical heavy-slurry reaction and transport systems.
Series 768 Heavy-Duty Slurry Valve Product Image
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Bray Series 768 Heavy-Duty Slurry Bidirectional Knife Gate Valve
Heavy-duty slurry bidirectional knife gate valve with pneumatic and electric actuator options
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Model confirmation
Confirm model, connection and key options before ordering.
After-sales support
After-sales communication support is provided according to the order agreement.
Specifications
- Size Range
- NPS 2 to 24 / DN 50 to 600
- Maximum Allowable Operating Pressure
- NPS 2 to 16: 150 psi / DN 50 to 400: 10 bar; NPS 18 to 24: 90 psi / DN 450 to 600: 6.2 bar (higher pressures available with select materials)
- Body Construction and Connection
- Two-piece bolted wafer
- Body Materials
- Ductile iron, carbon steel, stainless steel
- Gate Materials
- 304, 316, 317 stainless steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy C, Monel
- Stem Material
- 304 stainless steel
- Seat Materials and Temperature Range
- Natural rubber: -60° to 165°F (-51° to 74°C); EPDM: -65° to 248°F (-54° to 120°C)
- Sealing Design
- Dual resilient sleeves
- Scraper Material
- EPDM
- Gate Pressure Capacity
- Withstands 1.1 times the valve pressure rating
- Actuation Options
- Handwheel, bevel gear, pneumatic, hydraulic, electric
- Certifications
- ATEX, CRN, PED, PE(S)R, TR CU, UA TR
Application scenarios
HPAL and POX Hydrometallurgical Plants
For heavy slurry isolation in high-pressure acid leaching and pressure oxidation processes. This series is designed for high-pressure slurry applications, with a gate rated to withstand 1.1 times the valve pressure rating and available in duplex stainless steel, 17-4PH stainless steel, or Hastelloy C materials.
Chemical Heavy Slurry Reaction and Conveying Systems
For pipeline isolation in heavy slurry reaction and conveying systems in chemical production. This series features a self-cleaning gate and dual elastomer sleeves, making it suitable for on/off isolation of slurry media.
Selection points
Dual Resilient Sleeves and Self-Cleaning Gate Design
Features dual resilient sleeves and a self-cleaning gate design for slurry handling, helping reduce media buildup on the gate and in sealing areas.
Gate Pressure Margin and High-Strength Material Options
The gate withstands pressure up to 1.1 times the valve pressure rating and is available in high-strength materials such as SAF 2205 duplex stainless steel or 17-4PH to meet higher pressure-rating requirements.
Compact Two-Piece Bolted Wafer Design
Features a two-piece bolted wafer body and compact face-to-face dimensions for slurry systems with limited pipeline installation space.
Installation & maintenance notes
Verify Wafer Connection Conditions
This valve features a two-piece bolted wafer design. Before installation, verify that the valve specifications match the site pipeline connection conditions to ensure correct clamping installation.
Confirm Media Temperature Range for Sleeve Material
Before installation and commissioning, verify the media temperature based on the actual sleeve material. Natural rubber sleeves are suitable for temperatures from -51 to 74 °C, while EPDM sleeves are suitable for temperatures from -54 to 120 °C.
Inspect and Replace Dual Resilient Sleeves as Required During Maintenance
This valve uses dual resilient sleeves that can be replaced in the field. During maintenance, monitor sleeve condition and inspect and replace them as required in the event of wear, damage, leakage, or other abnormalities.
FAQ
How does the Series 768 bidirectional knife gate valve work?
The Series 768 uses dual resilient sleeves and a self-cleaning gate design. Its wafer connection provides flow-path sealing and opening, while the gate can withstand forces up to 1.1 times the valve pressure rating, making it suitable for multidirectional flow control of high-pressure slurry.
What are the key technical advantages of this valve in high-pressure slurry applications?
It integrates Bray SlurryShield technology, features field-replaceable sealing sleeves, and offers gates and wear-resistant components in multiple materials, including stainless steel and SAF series alloys, to improve durability and simplify field maintenance.
How should the valve be selected and its applicable pressure range determined?
The size range covers NPS 2–24 / DN 50–600. Maximum allowable operating pressure varies by size and material and should be confirmed based on the actual medium, temperature, and pressure rating. High-yield-strength gate materials can be selected for extreme service conditions to increase pressure-handling capacity.
What certifications and compliance information are available for the Series 768 valve?
The valve has ATEX, CRN, PED, PESR, TR CU, UA TR, and other certifications, complying with relevant industry standards and specifications.
What installation and maintenance considerations apply?
The valve has a two-piece wafer construction, and its sealing sleeves can be replaced in the field for rapid return to service. Actuation options include handwheel, gear, pneumatic, hydraulic, and electric. During installation, follow manufacturer requirements for alignment and tightening, and regularly inspect the seals and gate for wear.
Documents
Product Brochure - Bray Slurryshield® Series 768 Bidirectional Knife Gate ValveProduct information · EnglishProduct Brochure - Knife Gate Valve and Slurry Valve Product GuideProduct information · EnglishProduct Brochure - Series 768 Slurryshield® Bidirectional-Sealing Knife Gate ValveProduct information · ChineseProduct Guide - Knife Gate Valves - Product GuideProduct information · EnglishProduct Brochure - Bray Slurryshield® Series 768 Bidirectional Knife Gate ValvesProduct information · EnglishIOM Manual - Bray Slurryshield® Series 768 Bidirectional Knife Gate ValveManual · EnglishIOM Manual - Series 768 Bidirectional-Sealing Knife Gate Valve - Bray Slurryshield®Manual · ChineseIOM Manual - Bidirectional Slurry Knife Gate Valves - Bray Slurryshield® Series 768Manual · EnglishIOM Manual - Bidirectional Slurry Knife Gate Valves - Bray Slurryshield® Series 768Manual · EnglishSales Data Sheet - Slurryshield® Series 768 Bidirectional Heavy-Duty Slurry ValveProduct information · EnglishSales Data Sheet - KCA Linear SensorProduct information · EnglishSales Data Sheet - Slurryshield® Series 768 Bidirectional ValvesProduct information · EnglishRecommended Specification - Series 768 Bidirectional Knife Gate Valve Wafer Slurry ValveProduct information · English