The Bray 762 Series is a bidirectional heavy-duty slurry knife gate valve for NPS 3 to 48 (DN 80 to 1200) pipelines. It features a two-piece bolted flange body and a full-port flow passage, with ductile iron, carbon steel, and stainless steel body options as well as a range of corrosion-resistant gate materials. Handwheel, pneumatic, hydraulic, or electric actuators are available to meet isolation requirements across different sizes and pressure ratings.
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Bray 762 Series Bidirectional Heavy-Duty Slurry Knife Gate Valve
Bidirectional heavy-duty slurry knife gate valve for slurry handling applications such as mining, with optional pneumatic actuator.
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Specifications
- Valve Type
- Bidirectional knife gate valve
- Size Range
- NPS 3 to 48 / DN 80 to 1200
- Maximum Allowable Operating Pressure
- NPS 3 to 24: 100psi / DN 80 to 600: 7bar; NPS 26 to 42: 75psi / DN 650 to 1050: 5bar; NPS 48: 50psi / DN 1200: 3bar; higher pressures available with selected materials
- Body Materials
- Ductile iron (NPS 3 to 28 / DN 80 to 700); carbon steel and stainless steel (NPS 30 to 48 / DN 750 to 1200); other materials available upon request
- Gate Materials
- 304, 316, and 317 stainless steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy® C, Monel®, titanium
- Stem Material
- 304 stainless steel
- Seat Materials and Temperature Range
- Natural rubber: 165°F / 74°C; Buna-N: 194°F / 90°C; EPDM-HT: 302°F / 150°C
- Body Construction and Connection
- Two-piece bolted flanged design
- Flange Drilling Standards
- ASME B16.5 Class 150; ASME B16.47 Class 150
- Flow Path Design
- Full port
- Actuator Options
- Direct-mount handwheel, bevel gear operator, double-acting pneumatic actuator, hydraulic actuator, electric actuator
- Certifications
- ATEX, CRN, PED, PE(S)R, TR CU, UA TR
Selection points
SlurryShield Anti-Buildup Bidirectional Isolation
Incorporates Bray SlurryShield technology to reduce media buildup and provide bidirectional isolation for shutoff applications involving slurry and other deposition-prone media.
Replaceable Resilient Sleeves
Equipped with two replaceable resilient sleeves to protect the valve body, gate, and bonnet, helping extend the service life of related components.
Two-Piece Bolted Flange Valve Body
Features a two-piece bolted flange valve body design that combines structural strength with ease of maintenance.
Multiple Gate Material Options
Gate materials include 304, 316, 317 stainless steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy C, Monel, and titanium, enabling material selection based on media corrosiveness and abrasiveness.
Full-Port Flow Path
Features a full-port design to minimize resistance to pipeline media when the valve is fully open.
Multiple Actuation Options
Can be configured with a direct-mounted handwheel, bevel gear operator, double-acting pneumatic actuator, hydraulic actuator, or electric actuator to suit on-site operation and automation requirements.
Installation & maintenance notes
Flange Matching and Pipeline Alignment
Before installation, verify that the valve size and drilling standard match the mating pipeline flanges, and ensure proper alignment of the flanges and pipelines on both sides. This valve features a two-piece bolted flange design with ASME B16.5 Class 150 or ASME B16.47 Class 150 flange drilling.
Slurry Buildup and Drainage Collection
During installation, consider media buildup and drainage handling for slurry service conditions, and configure drainage collection options such as a drain plate, drain pan, or drain bucket as required.
Seat Material and Media Temperature Compatibility
Before commissioning, verify that the actual media temperature is within the allowable temperature range of the selected seat material. The maximum temperatures for natural rubber, Buna-N, and EPDM-HT seats are 74°C, 90°C, and 150°C, respectively.
Maximum Allowable Operating Pressure Verification
Before commissioning, verify that system pressure does not exceed the applicable maximum allowable operating pressure for the valve size and actual configuration. This pressure varies by size: 100psi for NPS 3 to 24 or 7bar for DN 80 to 600; 75psi for NPS 26 to 42 or 5bar for DN 650 to 1050; and 50psi for NPS 48 or 3bar for DN 1200.
FAQ
How does the Series 762 bidirectional knife gate valve work?
The Series 762 uses a bidirectionally isolating knife gate design to reliably shut off the medium from either end of the pipeline. SlurryShield technology helps prevent medium accumulation inside the valve body, enabling zero-leakage shutoff. When open, the valve provides a full-port flow path that reduces flow resistance and improves fluid dynamic efficiency.
What are the key selection criteria for this valve, and how should the suitable configuration be determined for different applications?
Selection should consider size range, body materials, stem and gate materials, certifications and actuator options, as well as operating pressure and temperature ranges. The Series 762 offers multiple material combinations and actuator configurations for demanding applications such as mining and chemical processing. The specific configuration must be confirmed based on the actual medium, temperature, and pressure conditions.
What are the maintenance considerations for the Series 762, and can components be replaced to extend service life?
The valve body uses a two-piece bolted flanged design for quick maintenance. The assembly includes two replaceable resilient sleeves that can extend the service life of the body, gate, and bonnet. Standard configurations also include upper and lower stem protection sleeves to help extend service life in dusty environments.
How suitable are these valves for highly corrosive or high-temperature applications?
Multiple seat materials are available, allowing the temperature range and material combination to be matched to different media and operating conditions. Carbon steel, stainless steel, and other body material options are available for higher-end configurations. The specific material and temperature compatibility must be confirmed for the actual model.
What drain collection options are available, and can they accommodate different liquid-handling requirements?
The Series 762 offers drain plate, drain pan, and drain bucket options, providing greater flexibility in fluid-handling applications to accommodate different drainage requirements.
Documents
Product Brochure - Bray SlurryShield® Bidirectional Knife Gate Valve Series 762Product information · EnglishProduct Brochure - Knife Gate and Slurry Valve Product GuideProduct information · EnglishProduct Brochure - Series 762 SlurryShield® Bidirectional Slurry ValveProduct information · ChineseProduct Guide - Knife Gate Valves - Product GuideProduct information · EnglishIOM Manual - Series 762 Bidirectional Slurry Knife Gate Valve - Bray SlurryShield®Manual · EnglishIOM Manual - Bray SlurryShield® Series 762 Slurry Knife Gate ValvesManual · EnglishIOM Manual - Bidirectional Knife Gate Valve for Slurry Series 762Manual · EnglishTechnical Sales Manual - Bray SlurryShield® Bidirectional Knife Gate Valve Series 762Manual · EnglishSales Data Sheet - SlurryShield® Bidirectional Heavy-Duty Slurry Valve 762Product information · EnglishSales Data Sheet - KCA Linear SensorProduct information · EnglishSales Data Sheet - SlurryShield® Series 762 Bidirectional Heavy-Duty Slurry ValvesProduct information · EnglishRecommended Specification - Series 762 Flanged Bidirectional Knife Gate Slurry ValveProduct information · English