3LSE-08S2C/70-24-0201SVH-BBU | Butterfly Valve | 2 Way | 8 Inch | Stainless Disc | 175 PSI | 24 VAC/30 VDC Actuator With Heater And Return To Closed Battery Backup Failsafe | Modulating Control | Bray

Bray’s 3L Series Nylon 11 coated and Stainless Steel disc resilient seated butterfly valves are designed for maximum reliability and low torque for the most efficient automation possible. Specifically designed for automated applications on chilled water, hot water and condenser water, all automated butterfly valves are 100 percent factory tested for bubble tight shut-off and industry leading low torque operation.

 

3L Series valves are available in 2-way configurations up to 24 inch and 3-way configurations up to 20 inch. Factory installed actuator options include industrial electric, commercial electric, high pressure pneumatic and low pressure pneumatic in both spring return and non spring return variations for On/Off and Modulating control applications. Differential pressure ratings are available for high Close-Off (up to 175 PSI) and low Close-Off (50 PSI) requirements.

 

- High purity Peroxide Cured EPDM seats.

- Low torque and superior rubber stability over the shelf life and service life of the valve.
- Nylon coated ductile iron disc (3LNE series only) offers superior corrosion and abrasion resistance and reduced torque requirements extending the life of the valve.
- Dead-End Service Rated, fully automatable for dead-end service applications.
- Wide variety of direct mount actuators reduces size, cost and hysteresis.
- Full and 50 PSI close-off pressure ratings available for maximum actuator pricing efficiency.

 

MOLDED-IN SEAT
Tightly controlled vulcanization process produces accurate and repeatable dimensions, which leads to consistently lower torques over the valve’s lifetime.

PRECISION ENGINEERED PROFILED DISC SEALING EDGE
Extends the valve life by reducing seat wear.

ROBUST FLANGE SEALING
Tear-dropped shaped seat face enables tight sealing with a wide variety of industrial flanges.

 

END OF LINE SERVICE
Sealing at full rated differential pressure.

ISO 5211 TOP FLANGE
Direct mounting capability between the valve and Bray actuation reduces package height and complexity.

 

UPPER AND LOWER STEM BEARINGS
Reduce operating torque and increase reliability in high cycle applications.

 

Service: Hot Water, Chilled Water, Condenser Water up to 50 percent Glycol.

Size Range: 2-Way, 2 inch through 24 inch (DN 50 to 600) 3-Way 2 inch through 20 inch (DN 50 to 500).

Body Style: One Piece Lug, 2-Way and 3-Way, for ANSI 125 and ANSI 150 flanges.

Flow Characteristics: Modified Equal Percentage – See submittal.

Temperature Limits: -20 to 250F (-28 to 121C).

Maximum Fluid Velocity: 30 ft/second (9 m/second).

Leakage: Bubble tight at rated maximum differential pressure.

Body Cold Working Pressure Ratings: 250 PSI (17.2 Bar).

- 2 to 12 available in 50 or 175 PSI.

- 14 to 24 available in 50 or 150 PSI.

- Automated versions for 250 PSI Dead End rated service available. See submittal.

- Body A536 Gr. 65-45-12 Ductile Iron.

- Disc (3LNE Series) - Nylon 11 coated, (3LNE Series) - 316 Stainless Steel.

- Seat EPDM (Ethylene Propylene Diene Monomer).

- Stem 416 Stainless Steel.

- Tee Ductile Iron (3-way valves only).

Weights: See submittal.

Design Standard: MSS SP-67, API 609, Category A.

Testing Standard: MSS SP-61, API 598, EN 12266-1.

Face to Face: MSS SP-67, API 609, Category A, EN 558.

Approvals and Certifications: ABS, ATEX, Bureau Veritas, CRN, DNV, FDA 21 CFR 177.1550, NSF 61/372, PED, PE(S)R

 

- Floating.

- Modulating.

- Non-Spring return.

- On/off.

- Spring return.

- Commercial.

- Industrial.

- Pneumatic.

 

Bray’s proven line of commercial actuators provide torques ranging from 27 to 560 lb.-in. in On/Off, Floating Point and Modulating input control signals and both non-spring return and spring return models. See our guide below to help choose which one is right for your application:

On/Off
- The actuator has two inputs and receives a signal for either 100 percent on or 100 percent off resulting in the valve going full open or full closed. No in between.
- Commonly used to control small loads or when isolating a coil, damper or other device.

Floating Point, 3-Position or Tri-State
- The actuator has three inputs, a common as well as clockwise and counter clockwise input signal terminals. -The actuator receives a signal to either drive the valve open or closed.

- When the set point is reached the actuator receives a signal to stop the valve and hold it at that set point. It then sends signals to open or close as needed to maintain the set point.
- Used as a less expensive option to modulating control.
- Many models will also function as On/Off.

 

Modulating/Proportional
- The output varies continuously and is not limited to being fully open or fully closed.

- The size of the signal is proportional to the temperature change required and thus eliminates overshoot.
- This control type is usually a variation of VDC. 0 or 2-10V, or 4-20mA.
- Used when precise control of coil is needed.

 

Spring Return
- Any of the above control signals can have a spring return feature.
- To prevent a runaway condition or freeze-up condition, when power is removed the actuator will fail to the initial position.
- Cooling coils should fail closed.

- Heating coils should fail open.

 

Bray Butterfly Valves for HVAC Applications
Bray is the largest butterfly valve manufacturer in the western hemisphere for a reason. Bray’s in house design team and Bray owned ISO 9001 manufacturing facilities have over 30 years of experience with this product. Our track record of reliability in thousands of installations over time bear this out. Bray Commercial Division offers two distinct lines of butterfly valves for HVAC applications. These low torque, high cycle life designs have emerged as the design standard in the commercial building market worldwide.

 

The Bray Series 70 Electric Actuator provides a rugged, compact industrial actuator solution to a wide range of quarter turn applications including butterfly valves, ball valves, and dampers. Available in torque outputs from 800 to