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Bidirectional Knife Gate Valve Series 768

Bray Series 768 heavy-duty slurry valve featuring SlurryShield technology, compact wafer design, dual elastomeric sleeves and self-cleaning gate, suitable for high-pressure slurry handling in mining, chemical and HPAL industries

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Product Overview

Heavy-duty solution for high-pressure slurry handling applications

Designed for Demanding Conditions with Extended Service Life

The Series 768 knife gate valve is an engineered solution for heavy-duty slurry handling applications. Featuring a compact wafer face-to-face dimension, this valve provides an efficient and space-saving solution for various slurry handling needs, equipped with Bray SlurryShield technology and capable of directly replacing conventional knife gate valves. The valve features dual elastomeric sleeves and a self-cleaning gate design. The gate design withstands 1.1 times the valve pressure rating, ensuring durability in high-pressure applications. Higher pressure ratings can be achieved using higher yield strength gate materials such as duplex 2205 or 17-4PH stainless steel. The sleeves are field-replaceable, allowing the valve to return to service quickly and extending service life. Certifications include CRN for Class 2 liquids and PED Category I Module A certification, ensuring compliance with industry standards and regulations. The Series 768 knife gate valve delivers in design and performance, demonstrating efficiency in heavy-duty slurry handling applications across mining, HPAL/POX, chemical, and other industries.

Technical Specifications

ItemParameter
Size RangeNPS 2 to 24 / DN 50 to 600
Body MaterialDuctile Iron, Carbon Steel, Stainless Steel
Maximum Allowable Operating PressureNPS 2 to 16: 150psi / DN 50 to 400: 10bar
NPS 18 to 24: 90psi / DN 450 to 600: 6.2bar
(Higher pressures available with selected materials)
Stem Material304 Stainless Steel
Body TypeTwo-Piece Bolted: Wafer
Gate Material304, 316, 317 Stainless Steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy® C, Monel®
Seat Material Temperature RangeNatural Rubber: -60° to 165°F (-51° to 74°C)
EPDM: -65° to 248°F (-54° to 120°C)
Design StandardManufacturer Standard
Wiper MaterialEPDM
Test StandardManufacturer Standard
CertificationsATEX, CRN, PED, PE(S)R, TR CU, UA TR
Face-to-Face DimensionManufacturer Standard
Actuator OptionsHandwheel, Bevel Gear, Pneumatic, Hydraulic, Electric
ApplicationsSlurry

FAQ

Why is the Bray Series 768 bidirectional knife gate valve suitable for high-pressure slurry applications?

The Series 768 is designed for heavy-duty slurry handling with dual elastomeric sleeves and a self-cleaning gate structure that reduces the impact of slurry on sealing areas. The gate can withstand loads up to 1.1 times the valve pressure rating, making it suitable for high-pressure slurry applications in mining, HPAL/POX, chemical, and other industries.

How to select the pressure rating and size range for the Series 768?

Size range is NPS 2 to 24 (DN 50 to 600). Maximum allowable working pressure for NPS 2 to 16 (DN 50 to 400) is 150 psi (10 bar); for NPS 18 to 24 (DN 450 to 600) it is 90 psi (6.2 bar). Higher pressure ratings may be achievable with higher yield strength gate materials.

What body, gate, and actuator configurations are available for the Bray Series 768?

Body options include ductile iron, carbon steel, or stainless steel. Gate options include 304, 316, 317 stainless steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy C, or Monel. Actuator options include handwheel, bevel gear, pneumatic, hydraulic, and electric. Specific configuration should be confirmed based on actual model and application conditions.

What is the seat temperature range for the Series 768? How to match media conditions?

Natural rubber seat temperature range is -51°C to 74°C; EPDM rubber seat temperature range is -54°C to 120°C. Seat material should be selected based on media temperature, slurry characteristics, and valve application conditions.

Are the sleeves of the Series 768 knife gate valve easy to maintain and replace?

Yes. The Series 768 features field-replaceable sleeves. When sleeve maintenance is required, field replacement can be performed, helping the valve return to service quickly and extending overall service life.

Documents

Product Brochure - Series 768 Bray Slurryshield® 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 - Válvulas de Cuchilla - Guía de ProductosProduct information · EnglishProduct Brochure - Válvulas de Cuchilla Bidireccionales Bray Slurryshield® Serie 768Product information · EnglishIOM Manual - Series 768 Bray Slurryshield® Bidirectional Knife Gate ValveManual · EnglishIOM Manual - Series 768 Bidirectional Sealing Knife Gate Valve - Bray Slurryshield®Manual · ChineseIOM Manual - Vannes á Guillotine Bidirectionnelles Pour Boues – Bray Slurryshield® Séries 768Manual · EnglishIOM Manual - Vannes á Guillotine Bidirectionnelles Pour Boues – Bray Slurryshield® Séries 768Manual · EnglishSales Data Sheet - Slurryshield® Bidirectional Heavy-Duty Slurry Valve 768Product information · EnglishSales Data Sheet - KCA Linear SensorProduct information · EnglishSales Data Sheet - Válvulas Bidireccionales Slurryshield® Serie 768Product information · EnglishRecommended Specification - Bidirectional Knife Gate Valve Series 768 Wafer Slurry ValveProduct information · English

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