The Bray 941 Series unidirectional knife gate valve features a one-piece lug-style body and is available with an integral metal seat or a replaceable zero-leakage resilient seat. It is suitable for NPS 2 to 24 applications at pressures up to 150 psi (10 bar). The dead-leg-free body supports self-draining and provides unidirectional isolation in slurry storage, mining, chemical process fluid, and hot gas pipelines.
Series 941 Unidirectional Knife Gate Valve Product Image
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Bray Series 941 Unidirectional Knife Gate Valve (Metal/Resilient Seat)
Unidirectional knife gate valve for isolation of high-temperature and viscous media, with optional resilient seat.
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Specifications
- Sealing Direction
- Unidirectional sealing
- Nominal Size Range
- NPS 2 to 24 / DN 50 to 600
- Maximum Allowable Operating Pressure
- 150 psi (10 bar)
- Body Type
- One-piece, lugged
- Body Materials
- Carbon steel (WCB), CF8 stainless steel, CF8M stainless steel, CF3M stainless steel, SAF 2205 duplex, SAF 2507 duplex
- Gate Materials
- 304, 316, 317 stainless steel, SAF 2507 duplex, 17-4PH, Hastelloy C, Monel, titanium
- Seat Type
- Integral metal seat; optional replaceable zero-leakage elastomer seat
- Design Standard
- MSS SP81
- Test Standard
- MSS SP151
- Face-to-Face Standard
- MSS SP81
- Actuator Options
- Handwheel, bevel gear, pneumatic, hydraulic, lever, electric
- Certifications
- ATEX, CRN, PED, PE(S)R, TR CU, UA TR
- Installation Orientation
- The lugged body is suitable for all installation orientations, including end-of-line service
- Drainage Design
- No dead-leg body with self-draining capability
Application scenarios
Slurry Storage System Isolation
For shutoff and unidirectional isolation in slurry storage systems and associated transfer pipelines; suitable for viscous and contaminated media.
Mining Process Media Pipeline Isolation
For shutoff and unidirectional isolation of pipelines carrying abrasive or contaminated media in mining processes.
Chemical and Process Fluid Isolation
For shutoff and unidirectional isolation in chemical and process fluid pipelines; suitable for corrosive media.
Hot Gas Pipeline Isolation
For shutoff and unidirectional isolation in hot gas pipelines; suitable for high-temperature service.
Selection points
Metal and Replaceable Resilient Seat Options
Available with an integral metal seat and an optional replaceable zero-leakage resilient seat, allowing selection according to seat requirements for unidirectional sealing service.
Self-Draining Lug Body with No Dead Legs
Features a one-piece lug body with a dead-leg-free, self-draining design for applications requiring reduced media retention within the valve body.
Multiple Body and Gate Material Combinations
Body options include carbon steel, stainless steel, and duplex steel. Gate options include various stainless steels, duplex steel, 17-4PH, Hastelloy C, Monel, and titanium, allowing material combinations to be selected according to media conditions.
All-Orientation Installation and End-of-Line Suitability
The lug body is suitable for all installation orientations, including end-of-line service, and can be selected based on piping layout requirements.
Radiused Gate Edges Extend Packing Life
Radiused gate edges help extend packing life and are suitable for shutoff and isolation applications where packing durability is a consideration.
Installation & maintenance notes
Install According to the Unidirectional Sealing Direction
The Bray Series 941 is a unidirectional-sealing knife gate valve. During installation, ensure that the valve pressure side and media flow direction match its designed sealing direction to avoid reverse installation, which may prevent reliable shutoff as designed or cause leakage.
FAQ
How does the Series 941 unidirectional knife gate valve achieve unidirectional sealing?
The Series 941 valve achieves unidirectional sealing through its radiused gate-edge design and is equipped with either metal or soft seats to meet sealing requirements under different media conditions, providing reliable isolation in unidirectional flow.
What high-temperature or viscous media applications is the Series 941 suitable for?
This series is suitable for general on/off and isolation applications involving clean, dirty, corrosive, abrasive, viscous, or high-temperature media. Specific selection should be confirmed based on the actual medium and temperature conditions.
What body material and actuator options are available?
Body materials include various steel and stainless steel grades. Available actuators include handwheel, gear, pneumatic, hydraulic, lever, and electric options. The specific combination should be determined according to the actual model and application conditions.
What design advantages does the Series 941 offer for installation and maintenance?
The design emphasizes alignment through the clevis and equalizing bolts, packing-sealing performance through energized star packing, and automatic body drainage, facilitating routine maintenance and long-term operation. Refer to the operating manual for the specific model for detailed maintenance requirements.
How should the correct valve be selected to meet unidirectional sealing requirements?
Compare key technical factors including the size range (DN50-600 / NPS2-24), maximum operating pressure, gate material, and seat options, and consider required enhanced features such as gate protection and limit switches to determine the most suitable configuration. The specific configuration should be confirmed based on the actual model and application conditions.
Documents
Product Brochure - Series 941 Unidirectional Knife Gate ValveProduct information · EnglishProduct Brochure - Knife Gate Valve and Slurry Valve Product GuideProduct information · EnglishProduct Guide - Knife Gate Valves - Product GuideProduct information · EnglishIOM Manual - Series 941 Unidirectional Knife Gate ValveManual · EnglishSales Data Sheet - Unidirectional Knife Gate Valves with Deflector ConesProduct information · EnglishSales Data Sheet - Unidirectional Knife Gate Valve Centrifuge DischargeProduct information · EnglishRecommended Specification - Series 941 Unidirectional Knife Gate ValveProduct information · English