Butterfly Gate Valves - CMT Inc.

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Butterfly Gate Valves

Slide Gates and Knife Gate Valves for Dry Bulk Powder Processing
Butterfly Valves are used in industrial applications to isolate or regulate the flow of material or fluid. The closing mechanism is a disk that rotates, thereby allowing or preventing the flow of material. The "butterfly" is a metal disc (stainless steel available) mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the product or liquid. CMT also provides valves that may be opened incrementally to allow throttle flow. Carolina Material Technologies offers 14 different models of the Butterfly Gate Valve.  The 14 Butterfly Gate Valves can be placed in 3 main categories: Resilient Seated, Double Offset, and Triple Offset.
RESILIENT SEATED BUTTERFLY VALVES
Butterfly Valve Series 20/21
Bray Series 20/21 butterfly gate valve surpasses the high standards required in sanitary valve applications. Bray's Series 20 valve is a wafer version with flange locating holes, and the Series 21 is the companion lug version for dead-end service and other flange requirements.

• Sanitary & Chemical applications
• One-piece disc/stem
• High CV, low pressure drop
Butterfly Valve Series 22/23
Bray Series 22/23 butterfly gate valve is manufactured in a variety of materials such as PTFE, Stainless Steel, UHMWPE and special alloys to meet a wide range of customer requirements.

• Seal Capsule - This seal capsule fully isolates the valve body and stem from the line media.
• Body Seals - These seals eliminate contamination from external environmental conditions and potential leak path from the line media.
Butterfly Valve Series 31H
Series 31H lug-style resilient seated butterfly valve is drilled and tapped to meet ASME Class 125/150 and PN16 flanges. The durable, high strength one-piece stem design utilizes an efficient internal disc to stem connection.

Series 31H valves provide a primary and secondary seal between the disc and seat, as well as the stem and seat, ensuring the total encapsulation of line media with zero external leakage.

Series 31H Valves will not be automated.
Butterfly Valve Series 3A-3AH
Bray’s Series 3A/3AH Butterfly Gate Valve is a Double Flanged design which can be used for dead-end service. A major design advantage of Bray valve product lines is international compatibility.

The same valve is compatible with most world flange standards – ASME Class 125/150, BS 10 Tables D and E, BS 4504 NP 10/16, DIN ND 10/16, AS 2129 and JIS10. In addition, the valves are designed to comply with ISO5752-Table2(EN558Table13) face-to-face and ISO 5211 actuator mounting flanges. Therefore, one valve design can be used in many different world markets.

Butterfly Valve Series 35-36
The Series 35/36 resilient seated butterfly valve provides the same robust features of the Series 32/33 valves with the addition of adjustable packing, increasing the maximum valve size offered to 120” (3000mm), and utilizing the flexible design of a fully flanged body. These valves hold to the Bray traditions of reliable performance and providing a long service life.

Size Range
22 - 120” (550 - 3000mm)

Body Materials
Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel

Stem Materials
416 Stainless Steel
Butterfly Valve Series 35F
Bray Series 35F large diameter resilient seated butterfly valves are designed specifically for high chloride services. Bray has carefully selected valve materials and designed features that optimize performance without sacrificing system efficiency. Series 35F valves offer rugged reliability in a light weight design.

Size Range
32 - 60" (800 - 1500mm)

Temperature Range
-20°F to 250°F (-29°F to 121°C)

Body Materials
Cast Iron, Ductile Iron, Hastelloy®

Stem Materials
Stainless Steel
Butterfly Valve Series 30/31
Bray series 30/31 butterfly gate valve’s high strength through-stem design allows easy dis-assembly and reduced disc to stem failure.

• Potable Water, Wastewater, Seawater, HVAC
• Primary and Secondary Seals: These seals prevent line media from coming in contact with the stem or body.

Primary Seal is achieved by an interference fit of the molded seat flat with the disc hub. Secondary Seal is created because the stem diameter is greater than the diameter of the seat stem hole.
Butterfly Valve Series 31U
Bray’s high quality, high pressure resilient-seated Butterfly Gate Valve is designed to meet the requirements of today's industrial/marine markets.

This bray valve is specifically designed for onshore and offshore fire protection where the applicable certification is D.O.T. 54 (UK Department of Trade).

The series 31U is designed to withstand high line velocities and pressure

Butterfly Valve Series 32-33
The Bray Series 32/33 Resilient Seated Butterfly Valve has many of the design features and benefits of the smaller Bray valves, such as high Cv ratings, minimum parts exposed to the line media, greater reliability and a proven record of long service life.

Size Range
22 - 36" (550 - 900mm)

Body Materials
Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel

Stem Materials
Stainless Steel, Duplex Stainless Steel, Super Austenitic Stainless Steel, Monel

Butterfly Valve Series 36H
Bray Controls is proud to offer a line of superior quality, high pressure manual butterfly valves that meet many of today's requirements in the process industry. Series 36H large diameter, double flanged resilient seated butterfly valves are rated for dead end service, as well as drilled and tapped to meet ASME Class 125/150 and PN16 flanges.

Size Range
24 - 60" (600 - 1500mm)

Temperature Range
-20°F to 250°F (-29°C to 121°C)

Body Materials
Ductile Iron

Stem Materials
17-4 PH Stainless Steel
DOUBLE OFFSET BUTTERFLY VALVES
High Performance Butterfly Valve - McCannalok
The McCannalok high performance butterfly valve (also known as a double offset butterfly valve) features an innovative design that offers rugged reliability and extremely easy maintenance in the field. Independent and internal tests prove the Series McCannalok valve's superior service life capability, with zero leakage shutoff.

Size Range
2½ - 66" (65 - 1650mm)

Temperature Range
-62°F to 500°F (-52°C to 260°C)

Body Materials
Carbon Steel, Stainless Steel, Nickel Aluminum Bronze

Stem Materials
Stainless Steel
High Performance Butterfly Valve - Series 41R
The Bray/McCannalok Series 41R high performance butterfly valve is specially designed for the sugar industry to offer rugged reliability and extremely easy maintenance in the field. Independent and internal tests have proven Bray/ McCannalok’s superior service life capability, with zero leakage shutoff through over 100,000 cycles.

Size Range
16 - 54" (400 - 1400mm)

Temperature Range
-20°F to 500°F (-29°C to 260°C)

Body Materials
Phosphatized Ductile Iron, Phosphatized Carbon Steel

Stem Materials
Stainless Steel
TRIPLE OFFSET BUTTERFLY VALVES
Triple Offset Butterfly Valve - Tri Lok
Tri Lok’s standard, non-rubbing, metal-to-metal sealing system delivers zero leakage with a minimal amount of torque and is inherently fire-safe. The resiliency of the seal ring ensures uniform peripheral sealing with the seat, achieving full shutoff regardless of flow direction. Tri Lok offers a solid metal seal ring for high-temperature and severe service applications to ensure bi-directional shutoff throughout the full pressure/temperature range.

Size Range
3 – 48” (80 – 1200mm)

Temperature Range
-320°F to 842°F (-196°C to 450°C)

Body Materials
Carbon Steel, Stainless Steel & Other Materials Upon Request

Stem Materials
17-4PH, 410 Stainless Steel, & XM-19 (Nitronic 50)
Tri Lok Butterfly Valve - Top Entry
Tri Lok’s standard, non-rubbing, metal-to-metal sealing system delivers zero leakage with a minimal amount of torque and is inherently fire-safe. The resiliency of the seal ring ensures uniform peripheral sealing with the seat, achieving full shutoff regardless of flow direction. Tri Lok offers a solid metal seal ring for high-temperature and severe service applications to ensure bi-directional shutoff throughout the full pressure/temperature range.

Size Range
3 – 48” (80 – 1200mm)

Temperature Range
-320°F to 842°F (-196°C to 450°C)

Body Materials
Carbon Steel, Stainless Steel & Other Materials Upon Request

Stem Materials
17-4PH, 410 Stainless Steel, & XM-19 (Nitronic 50)
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