Resilient Seat Electric Butterfly Valves

Flowx Resilient Seated Butterfly Valve's seat design and internal disc to stem connection isolates the line media from the body and stem. The seat is designed to seal with slip-on or weld-neck flanges and the molded o-ring eliminates the need for flange gaskets. 

The tongue and groove design locks the seat in place and makes the valve dead end capable.

Highlights at a glance:

• All Bray valves are pressure tested to 110% of rated pressure to assure bubble tight shutoff

• Tongue and Groove seat design locks the seat in place and makes the valve dead end capable

• Chemical resistant, weather resistant, abrasion and impact resistant coating

• Internal disc-to-stem connection

• ISO 5211 international compatability

• Direct mount all Bray actuators including handles, gear operators, pneumatic and electric actuators

Valve torques are lower and more consistent as the seat dynamics are not dependent on being coupled between two flanges. Precision machining of the disc and body allow the cartridge design to maintain a tighter disc to seat tolerance, providing a perfect low torque seal each and every time the valve is cycled. The seat to disc seal is independent of flange support and capable of full rated dead end service.

 Actuators are directly mounted creating a compact assembly for tight spaces. Limit switches are able to be mounted directly to the valves allowing for remote position indication. The Series WE20 can be configured with either an electric or pneumatic actuator. Electric actuators are available in weatherproof or explosion-proof, a variety of supply voltages and two-position or modulating control. Two-position actuators use the supply voltage to drive the valve open or closed, while the modulating actuator accepts a 4-20 mA input for valve positioning. Actuators feature thermal overload protection and permanently lubricated gear train. 

The pneumatic double acting actuator uses an air supply to drive the valve open and closed. The actuator has two supply ports, with one driving the valve open and the other driving the valve closed. Spring return pneumatic actuators use the air supply to open the valve, and internally loaded springs return the valve to the closed position

The pneumatic double acting actuator uses an air supply to drive the valve open and closed. The actuator has two supply ports with one driving the valve open and the other driving the valve closed. Spring return pneumatic actuators use the air supply to open the valve and internally loaded springs return the valve to the closed position. Also available is the SV3 solenoid valve to electrically switch the air supply pressure between the air supply ports for opening and closing the valve. Actuators are constructed of anodized and epoxy coated aluminum for years of corrosion free service.

Products pictures

Specifications

• SPECIFICATIONS VALVE

• Service:

• Compatible liquids, gases, and steam.

• Body:2-way, wafer or lug butterfly.

• Line Sizes:2 to 12".

• End Connections:Lug and wafer pattern designed for flanges that are ANSI Class 125 (B16.1) and ANSI Class 150 (B16.5) dimension.

• Pressure Limits:225 psi (15.5 bar).

• Wetted Materials:Body Material: Ductile iron WCB,SS304,SS316; Disc: Aluminium bronze C954 ,SS304,SS316,316 SS; Seat: EPDM or PTFE NBR,VITON; O-ring: EPDM; Stem: 410 SS.

• Temperature Limits:

• Disc: EPDM: -50 to 250°F (-15 to 85°C); PTFE: 0 to 300°F (-18 to 150°C),NBR:-50 to 250°F (-15 to 85°C),VITION:(-25 to 250°C)

• Bearings:Nylatron.

   *Operator:2 to 6" 10-position locking hand lever; 8 to 12": manual gear.

ACTUATORS

• Pneumatic “DA” and “SR” Series Type:DA series is double acting and SR series is spring return (rack and pinion).

• Normal Supply Pressure:DA: 40 to 115 psi (2.7 to 7.9 bar); SR: 70 to 115 psi (4.8 to 7.9 bar).

• Maximum Supply Pressure:120 psi (8.6 bar).

• Air Connections:DA03 thru DA11: 1/4" FNPT; SA03 thru SR11: 1/4" FNPT.

• Housing Material:Anodized aluminum body and epoxy coated aluminum end caps.

• Temperature Limits:-40 to 176°F (-40 to 80°C).

• Accessory Mounting:NAMUR standard.

Electric "TH" and "MH" Series

• Power Requirements:110 VAC, 220 VAC, 24 VAC or 24 VDC.

• Power Consumption:See instruction manual.

• Cycle Time (per 90°):See instruction manual.

• Duty Rating:See instruction manual.

• Enclosure Rating:NEMA 7, designed to meet hazardous locations: Class I, Group C & D; Class II, Group E, F & G; Division I & II.

• Housing Material:Powder Coated Aluminum.

• Temperature Limits:-22 to 140°F (-30 to 60°C).

• Electrical Connection:1/2" female NPT.

• Modulating Input:4 to 20 mA.

• Standard Features:Position indicator and two limit switches.

  Production Applications