Bray Series 765 Bidirectional Knife Gate Valve (Slurry Service)

Ductile iron bidirectional knife gate valve for slurry pipeline isolation, with optional pneumatic actuator.

Genuine product assurance

We can help verify product data and purchasing details.

Model confirmation

Confirm model, connection and key options before ordering.

After-sales support

After-sales communication support is provided according to the order agreement.

The Bray Series 765 bidirectional knife gate valve is designed for on/off isolation in slurry handling pipelines. It features a two-piece bolted wafer body, with sizes ranging from NPS 2 to 12 and a maximum allowable operating pressure of 90 psi (6.2 bar). Its push-pull gate and dual elastomer seats provide an unobstructed flow path when fully open, making it suitable for sugar processing, pulp and paper, and abrasive industrial slurry conveying applications.

Specifications

Size Range

NPS 2 to 12 / DN 50 to 300

Body Materials

Ductile iron, CF8, CF8M, CF3M, WCB

Maximum Allowable Operating Pressure

90psi（6.2bar）

Body Type

Two-piece bolted - wafer

Stem Material

304 stainless steel

Gate Materials

304, 316, 317 stainless steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy® C, Monel®

Seat Material Temperature Range

Natural rubber: 165°F / 74°C, EPDM: 248°F / 120°C

Certifications

ATEX, CRN, PED, PE(S)R, TR CU, UA TR

Face-to-Face Standard

MSS SP81

Actuator Options

Handwheel, bevel gear, pneumatic, hydraulic, electric

Application scenarios

Slurry transfer line isolation in the sugar industry

Used for on-off isolation of slurry transfer lines in sugar processing. The sliding gate and dual elastomer seats help promote self-cleaning and reduce media buildup, while the valve provides an unobstructed flow path when fully open.

Pulp transfer line isolation in the pulp and paper industry

Used for on-off isolation of pulp transfer lines in pulp and paper processing. The full-port design helps fibrous pulp media pass smoothly and is suitable for abrasive industrial media handling applications.

Isolation of abrasive industrial slurry lines

Used for on-off isolation of process pipelines conveying abrasive industrial slurries. The elastomer seats and sliding gate help remove adhered media during operation and reduce buildup.

Selection points

Dual Elastomer Seat and Push-Through Gate Self-Cleaning Design

Features dual elastomer seats and a push-through gate design for self-cleaning and prevention of media buildup, suitable for demanding slurry applications.

Unobstructed Full-Open Flow Path

When fully open, the valve provides an unobstructed flow path without restricting pipeline media flow.

Two-Piece Bolted Wafer Body

Features a compact two-piece bolted wafer body with a face-to-face dimension compliant with MSS SP81.

Multiple Corrosion-Resistant Gate Material Options

Gate options include 304, 316, and 317 stainless steel, SAF 2507, SAF 2205, 17-4PH, Hastelloy C, and Monel.

Installation & maintenance notes

Verify Seat Temperature Suitability

Before commissioning, verify the media temperature against the installed elastomer seat. Natural rubber seat temperature must not exceed 74°C, and EPDM seat temperature must not exceed 120°C.

Observe Maximum Allowable Operating Pressure

Actual system operating pressure must not exceed 90 psi (6.2 bar).

FAQ

What applications is the Series 765 bidirectional knife gate valve suitable for?

It is primarily used in slurry applications such as sugar processing, pulp, and paper, and is suitable for handling abrasive industrial media.

What are the size and pressure ratings of the Series 765 bidirectional knife gate valve?

The size range is NPS 2 to 12 (DN 50 to 300), with a maximum allowable operating pressure of 90psi（6.2bar）.

What construction and materials are used for the Series 765 bidirectional knife gate valve?

The valve body has a two-piece bolted wafer design and is available in ductile iron, CF8, CF8M, CF3M, or WCB. The stem is 304 stainless steel, and the gate is available in various stainless steels and corrosion-resistant alloys.

What actuator options are available for the Series 765 bidirectional knife gate valve?

Available actuator options include handwheel, bevel gear, pneumatic, hydraulic, and electric.

What is the seat temperature range of the Series 765 bidirectional knife gate valve?

Natural rubber seats are rated to a maximum of 165°F（74°C）, while EPDM seats are rated to a maximum of 248°F（120°C）. The specific configuration must be confirmed based on the actual model and application conditions.