Series 755 Bidirectional Knife Gate Valve Product Image
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Bidirectional Knife Gate Valve Series 755

Bray Series 755 bidirectional knife gate valve features a two-piece bolted body and field-replaceable polyurethane lining, steel-reinforced molded peripheral seat for zero-leakage bidirectional shutoff, suitable for abrasive and corrosive slurry applications

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Product Overview

Durable bidirectional valve with field-replaceable lining for abrasive industrial applications

Built for Durability in Corrosive Industrial Applications

The Bray Series 755 bidirectional knife gate valve is designed with performance and reliability in mind, specifically engineered for abrasive and corrosive slurry in various applications. Its design and robust construction set new standards for efficiency and durability in industrial environments. The Series 755 valve features a sturdy two-piece bolted body construction, ensuring structural integrity, simplifying maintenance procedures, and improving operational efficiency. Similar to Series 752, this valve utilizes a steel-reinforced molded peripheral seat for zero-leakage bidirectional shutoff. The Series 755 is available in sizes from 2” to 24” (50 - 600 mm), offering flexibility to meet various application needs. It can easily withstand pressures up to 240 psi (16 bar). To meet specific application requirements, the Series 755 knife gate valve offers a variety of body material options, including CF3M stainless steel, SAF 2205 duplex, and SAF 2507 duplex for corrosive applications. Additionally, the Series 755 knife gate valve features a field-replaceable polyurethane lining for enhanced performance, providing a cost-effective solution for abrasive applications.

Technical Specifications

ItemParameter
Size RangeNPS 2 to 24 / DN 60 to 600
Body MaterialDuctile Iron, Carbon Steel (WCB), CF8 Stainless Steel, CF8M Stainless Steel, CF3M Stainless Steel
Maximum Allowable Operating Pressure240psi (16 bar)
Stem Material304 Stainless Steel
Body TypeWafer, Bolted Two-Piece
Gate Material304, 316, 317 Stainless Steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy® C, Monel®
Seat Material Temperature RangeBuna-N: -34 to 194°F (-36 to 90°C)
EPDM: -65 to 248°F (-54 to 120°C)
Viton®: -15 to 392°F (-26 to 200°C)
Design StandardMSS SP81
Gland Packing Max TemperaturePTFE/Buna-N: 194°F (90°C)
PTFE/Viton®: 392°F (200°C)
PTFE/EPDM: 248°F (120°C)
Test StandardMSS SP151
Lining Max Temperature176°F (80°C)
CertificationsATEX, CRN, PED, PE(S)R, TR CU, UA TR
Face-to-Face DimensionMSS SP81
Actuator OptionsHandwheel, Bevel Gear, Pneumatic, Hydraulic, Electric

FAQ

What media and operating conditions is the Bray Series 755 bidirectional knife gate valve suitable for?

The Series 755 is suitable for industrial applications involving abrasive or corrosive slurries requiring bidirectional shutoff. Its two-piece bolted body, steel-reinforced molded peripheral seat, and field-replaceable polyurethane lining make it ideal for applications needing both durability and maintenance convenience. Specific configuration should be confirmed based on media composition, temperature, pressure, and wear conditions.

What installation orientation requirements does the Series 755 bidirectional sealing design have?

The Series 755 uses a steel-reinforced molded peripheral seat for zero-leakage bidirectional shutoff. Therefore, as long as the valve specification and system design requirements are met, the valve can accommodate bidirectional differential pressure shutoff needs. Installation position should still be determined based on site pipeline layout, actuator operating space, and maintenance requirements.

How to select body, gate, and seat materials for the Bray 755 knife gate valve?

Material selection should center on media corrosiveness, abrasiveness, and operating temperature. Body options include ductile iron, WCB carbon steel, CF8, CF8M, or CF3M stainless steel. Gate options include 304, 316, 317 stainless steel, SAF 2205, SAF 2507, 17-4PH, Hastelloy® C, or Monel®. Seat options include Buna-N (-36 to 90°C), EPDM (-54 to 120°C), or Viton® (-26 to 200°C). Specific configuration should be confirmed based on actual model and application conditions.

Can the Series 755 polyurethane lining be replaced in the field? What are the usage considerations?

Yes. The Series 755 features a field-replaceable polyurethane lining, providing a more maintenance-friendly solution for abrasive applications. The maximum operating temperature of the lining is 80°C. Applications should confirm media temperature does not exceed this range and schedule inspection and replacement based on media wear characteristics.

What actuator options are available for the Bray Series 755, and what are its pressure and size ranges?

The Series 755 can be configured with handwheel, bevel gear, pneumatic, hydraulic, or electric actuators, selected based on operating frequency, automation requirements, and site control method. Valve size range is NPS 2 to 24 (DN 60 to 600). Maximum allowable working pressure is 240 psi (16 bar). Specific actuator configuration should be confirmed based on actual model and application conditions.

Documents

Product Brochure - Bidirectional Polyurethane Lined Slurry Valve Series 755Product information · EnglishProduct Brochure - Knife Gate Valve and Slurry Valve Product GuideProduct information · EnglishProduct Guide - Válvulas de Cuchilla - Guía de ProductosProduct information · EnglishProduct Brochure - Válvulas Bidireccionales para Slurry con Revestimiento en Uretano Serie 755Product information · EnglishProduct Brochure - Válvulas Bidireccionales para Slurry con Revestimiento Adherido de Uretano Serie 755HPProduct information · EnglishIOM Manual - Válvula de Cuchilla Bidireccional con Asiento Perimetral Serie 755/755HPManual · EnglishIOM Manual - Válvula de Cuchilla Bidireccional con Asiento Perimetral Serie 755Manual · English

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