Threaded Butterfly Valves
Description
Threaded butterfly valves are a type of rotary valve that utilize a disc-shaped closure member to control the flow of fluids through a pipeline. The valve operates by rotating the disc approximately 90 degrees to either open or close the flow passage. This design allows for quick and efficient modulation of flow, making them an essential component in fluid control systems.
Working Principle
The working principle of threaded butterfly valves involves a circular disc mounted on a spindle, which acts as the valve’s closure element. By rotating the disc, users can control the flow of the substance through the pipeline. The valve's design allows for a rotary stem movement of 90 degrees or less, providing a compact and efficient means of controlling fluid flow. This makes butterfly valves particularly useful for applications requiring quick shut-off and minimal pressure drop when fully open.
Applications
Threaded butterfly valves are used in a variety of applications due to their versatility and efficiency. Specific examples include:
- Water treatment plants, where they provide excellent sealing and can withstand water pressure.
- Chemical processing industries, where they handle corrosive media due to their chemical-resistant elastomers.
- Steam control applications, where they regulate the flow of steam with precision.
Advantages over other Butterfly Valves
Threaded butterfly valves offer several advantages over other types of butterfly valves:
- They provide a high coefficient of flow and low pressure drop, making them efficient for large flow applications.
- Their compact and lightweight design allows for easy installation and maintenance.
- They are cost-effective, especially in large-diameter pipelines, reducing the need for more expensive valve types.
Limitations
Despite their advantages, threaded butterfly valves have some limitations:
- They may experience loose shut-off, which can be a disadvantage in applications requiring tight sealing.
- The unguided disc movement can be affected by flow turbulence, potentially impacting performance.
- They are not ideal for applications involving slurries or highly abrasive materials, as these can cause wear on the valve components.
Considerations
When selecting threaded butterfly valves, several considerations should be taken into account:
- Initial Costs: These valves are generally affordable, but costs can vary based on materials and size.
- Operating Expense: They offer low operating expenses due to their efficient design and minimal pressure drop.
- Durability: The use of corrosion-resistant materials enhances durability, but regular maintenance is necessary to ensure longevity.
- Accuracy: While they provide good flow control, the potential for loose shut-off may affect accuracy in certain applications.
- Replacement and Maintenance Costs: The simple design with fewer parts makes repair and maintenance relatively easy and cost-effective. However, the potential for wear in abrasive applications should be considered in maintenance planning.
from Radwell International
VALVE, BUTTERFLY, F-NPT, THREADED OUTLET. FREE 2 YEAR RADWELL WARRANTY [See More]
- Connection Description: Threaded
from Plast-O-Matic Valves, Inc.
Actuator Features. • Million cycle design. • Polished bore & low friction bearings. • Visual indication. • Blowout-proof shaft. • Precision machined gears. • Meets ASTM B117-73 (500 hours salt spray). Design & Materials: Valve lug body is PVC, disc is... [See More]
- Connection Description: Threaded
- Maximum Pressure: 60.00
- Valve Size: 2.00 to 8.00
- Actuation: Electric
from RS Components, Ltd.
2in. Wafer Pattern Butterfly Valve [See More]
- Connection Description: Threaded
- Media: Air
- Valve Size: 2.00
from Asahi/America, Inc.
The Type-57P butterfly valve from Asahi/America has the ability to mount a series 79 pneumatic actuator to allow for the valve to be controlled via an air supply. Actuators are sized to operate on 80psi of air pressure, and can be sized to operate on different air pressures upon request. Actuators... [See More]
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Connection Description: Threaded;
1/4" NPT
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Material Of Construction:
Glass filled polyamide, cataphoresis coated aluminum, stainless steel
; Aluminum; Stainless Steel; Nylon
- Valve Size: 1.50 to 24.00
from RS Components, Ltd.
3in. Wafer Pattern Butterfly Valve [See More]
- Connection Description: Threaded
- Media: Air
- Valve Size: 3.00
from Asahi/America, Inc.
ALL Fast Packs ship within 24 hours from time the order is placed!*. *Note: Fast Pack delivery times may vary based on availability and inventory. Every effort will be made to meet our 24-hour shipping goal. Fast Pack items ordered with other Asahi/America products may affect delivery. The Type-57P... [See More]
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Connection Description: Threaded; BoltFlange;
¼" NPT
- Actuation: Pneumatic
- Valve Size: 1.50 to 8.00
-
Material Of Construction:
PVC
; Aluminum; PVC; Nylon
from RS Components, Ltd.
3in Lugged Butterfly Valve Direct [See More]
- Connection Description: Threaded
- Media: Air
- Valve Size: 3.00
from Asahi/America, Inc.
ALL Fast Packs ship within 24 hours from time the order is placed!*. *Note: Fast Pack delivery times may vary based on availability and inventory. Every effort will be made to meet our 24-hour shipping goal. Fast Pack items ordered with other Asahi/America products may affect delivery. The Type-57P... [See More]
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Connection Description: Threaded; BoltFlange;
¼" NPT
-
Material Of Construction:
PVC
; PVC; Nylon
- Valve Size: 1.50 to 8.00
from GF Piping Systems
Ball Valves: Available in PVC and CPVC, the type 104 ball valve from Georg Fischer offers an economic solution for less demanding applications. The type 104 is based on the same industrial ball valve Georg Fischer uses in other applications. This means the valve is true union and can be repaired if... [See More]
- Connection Description: Threaded; BoltFlange; Union; Socket Weld; Fusion
- Maximum Pressure: 150.00 to 232.00
- Valve Size: 0.38 to 12.00
- Actuation: Electric
from KSB AG
Design. Butterfly valve for building services, with anti-condensation feature, elastomer liner (EPDM XU). With lever or manual gearbox. Semi-lug type body (type T2), suitable for downstream dismantling and dead-end service. Valve disc made of nickel-coated nodular cast iron. Connections to EN... [See More]
- Connection Description: Threaded
- Maximum Pressure: 232.06
- Valve Size: 0.79 to 11.81
- Media Temperature: 14 to 266
from Lumaco Sanitary Valves
The valve dismantles quickly into two symmetrical parts [See More]
- Connection Description: Threaded; Both Ends Threaded
- Actuation: Pneumatic
- Valve Size: 1.00
- Material Of Construction: Stainless Steel
from Curtiss-Wright, Valve Group
Curtis Wright provides a variety of industrial grade butterfly valves that meet the harsh environments suitable for applications such as power and oil, petrochemical, hydrocarbon service, seawater cooling systems and offshore applications. Curtiss-Wright butterfly valves are supplied through their... [See More]
- Connection Description: Threaded; BoltFlange
- Actuation: Manual; Pneumatic (optional feature)
- Valve Size: 2.00 to 84.00
- Material Of Construction: Stainless Steel; Steel; Exotic Metal
from Velan, Inc.
A fire safe resilient-seated ball valve, ideal for use in a wide range of applications. Features and benefits. Velan's VTP-2000 3-piece ball valve is a high performance ball valve, ideal for a wide variety of services. Designed for simple, in-line maintenance, and long, reliable service life, this... [See More]
- Connection Description: Threaded; Socket Weld; Socket weld, Threaded
- Maximum Pressure: 1500.00 to 2000.00
- Valve Size: 0.50 to 2.00
- Media: Water; Steam
from NIBCO INC.
Corzan ® CPVC 80 valves for use with hot corrosive liquids, chemical processing, industrial plating, chilled water distribution, deionized water lines, chemical drainage and waste water treatment systems. Valve pressure rating 250 psi at 73 °F water non-shock full-port, Maximum service... [See More]
- Connection Description: Threaded; Union; Socket Weld
- Maximum Pressure: 250.00
- Valve Size: 0.50 to 6.00
- Media Temperature: 210
from KZVALVE
The KZValve Butterfly Valves are engineered for actuation and designed to work with the KZValve actuators. These reliable valves are proven performers season after season. • 2" and 3" cast iron valves. • 4" and 5" aluminum valves. • Disk: 316 stainless steel. • Stem: 316... [See More]
- Connection Description: Threaded
- Maximum Pressure: 150.00
- Valve Size: 2.00
- Flow (Cv): 277.00
from Hayward Flow Control
The BYV Series butterfly valves are available in PVC, CPVC and GFPP bodies and discs. Liners and seals available in VITON, EPDM or Nitrile materials. 316SS Stems are standard. The BYV Series features a revolutionary hand lever with 19 lockable stop positions and 360 degree interlocking splines. [See More]
- Connection Description: Threaded
- Maximum Pressure: 150.00
- Valve Size: 2.00 to 12.00
- Media Temperature: 70
from GF Piping Systems
Ball Valves: The Type 230 Series Pneumatically Actuated Ball Valve from Georg Fischer is the ultimate choice for the high demands of the industrial world. It is available in PVC, CPVC, PP-H, and PVDF material. The valve can be configured for throttling or for simple open/close functionality. The... [See More]
- Connection Description: Threaded; BoltFlange; Union; Socket Weld; Fusion
- Maximum Pressure: 150.00 to 232.00
- Valve Size: 0.38 to 12.00
- Actuation: Pneumatic
from Velan, Inc.
A comprehensive range of small forged gate, globe, check, angle and bellows seal valves with unique design features. Features and benefits. • Long cycle life bellows (3000 cycles): Designed and qualification tested for high pressure/temperature service. • Bellows monitoring port... [See More]
- Connection Description: Threaded; BoltFlange; Socket Weld; Threaded, Socket weld, Flanged
- Media: Water; Wastewater
- Valve Size: 0.50 to 2.00
- Agency: ASME
from NIBCO INC.
PVC Schedule 80 Valves for use with hot corrosive liquids, chemical processing, industrial plating, chilled water service, deionized water lines, vacuum service, and waste treatment systems. Valve pressure rating 250 psi at 73 °F water non-shock, Full port, Maximum service temperature 140... [See More]
- Connection Description: Threaded; BoltFlange; Union; Socket Weld
- Maximum Pressure: 250.00
- Valve Size: 0.50 to 10.00
- Media Temperature: 140
from KZVALVE
2" Cast iron butterfly valve, EPDM seats, stainless steel disk, stainless steel valve stem, rated for 150 psi at 70 ° F [See More]
- Connection Description: Threaded
- Maximum Pressure: 150.00
- Valve Size: 2.00
- Material Of Construction: Cast Iron
from Hayward Flow Control
BYCN Pure-Blu ™ Series Butterfly Valve sizes 2 in. to 8 in. PVC Body and PVC Disc only. All liners and seals are EPDM. Type 316 Stainless Steel Shaft. BYCN Pure-Blu ™ butterfly valves are offered with a lever handle or a gearbox. NSF/ANSI 61 Listed [See More]
- Connection Description: Threaded; BoltFlange
- Actuation: Manual
- Valve Size: 2.00 to 8.00
- Material Of Construction: PVC
from Velan, Inc.
A comprehensive range of small forged gate, globe, check, angle and bellows seal valves with unique design features. Features and benefits. • Long cycle life bellows (10,000 cycles): Designed and qualification tested for high pressure/temperature applications. • Bellows monitoring port... [See More]
- Connection Description: Threaded; BoltFlange; Socket Weld; Threaded, Socket weld, Flanged
- Media: Water; Wastewater
- Valve Size: 0.50 to 2.00
- Agency: ASME
from KZVALVE
4" Aluminum butterfly valve, EPDM seats, stainless steel disk, stainless steel valve stem, rated for 50 psi at 70 ° F, 12 volt DC motor, on/off, 3.0 second cycle time, 3 wires (red to positive, black to negative, white to positive switch), wiring pigtail included. [See More]
- Connection Description: Threaded
- Maximum Pressure: 50.00
- Valve Size: 4.00
- Material Of Construction: Aluminum
from Velan, Inc.
Forged, one-piece inclined globe and check valves for high pressure applications. Features and benefits. • NO TORSION OF BELLOWS: Splined stem prevents torsion of bellow sand assures long cycle life. • LONG CYCLE LIFE BELLOWS (5000 cycles): Designed for, and successfully tested in, high... [See More]
- Connection Description: Threaded; Butt Weld; Socket Weld; Threaded, Socket weld, Butt weld
- Media: Steam
- Valve Size: 0.50 to 2.00
- Agency: ASME
from KZVALVE
5" Aluminum butterfly valve, EPDM seats, stainless steel disk, stainless steel valve stem, rated for 50 psi at 70 ° F [See More]
- Connection Description: Threaded
- Maximum Pressure: 50.00
- Valve Size: 5.00
- Material Of Construction: Aluminum
from Velan, Inc.
A comprehensive range of small forged gate, globe, check, angle and bellows seal valves with unique design features. Features and benefits. • Available types: Piston, Ball, Swing check [See More]
- Connection Description: Threaded; BoltFlange; Socket Weld; Threaded, Socket weld, Flanged
- Agency: ASME
- Valve Size: 0.25 to 2.00
from Velan, Inc.
A comprehensive range of small forged gate, globe, check, angle and bellows seal valves with unique design features. Features and benefits. This valve is designed for continuous blowdown but can also be used for sampling and boiler feed pump bypass relief where high pressure drop causes erosion and... [See More]
- Connection Description: Threaded; Socket Weld; Threaded, Socket weld
- Agency: ASME
- Valve Size: 0.50 to 2.00