NIBCO butterfly valves service high-performance and fire protection systems and are available in a broad size range with wafer lug, grooved, or press end connections. NIBCO butterfly valves feature an industry-leading molded-in liner (up to 12") that virtually eliminates the potential for leaks versus a standard cartridge-style liner.
Butterfly valves provide bi-directional dead-end service in commercial and industrial applications and can offer many maintenance-free cycles and still accommodate “bubble tight” shut-off.
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Factors to Consider When Choosing a Butterfly Valve
Operating Life
NIBCO butterfly valves provide many maintenance-free cycles and accommodate “bubble tight” shut-off over the life of the valve.
Pressure Drop
Excessive pressure drops cause energy costs to increase. Valves can contribute to pressure drop. Other factors that affect pressure drop include:
- Flow area of piping
- Friction loss against pipe walls
- Change of flow direction via fittings
The flow characteristics of butterfly valves are three times better than globe valves and approximately 75% of an equivalent gate valve.
Versatility
Butterfly valves can be used for on/off service and throttling/balancing. They are superior in “versatility” compared to a gate or globe valve. In addition, butterfly valves have a more comprehensive range of chemical resistance due to the trim options and choice of elastomeric liners.
Weight
Installation dollars can be saved by using lightweight butterfly valves compared to heavyweight cast iron valves; i.e., a 10" butterfly may weigh 55 pounds, whereas a 10" iron gate may weigh 490 pounds. This can be important savings when calculated over an entire system. The heavier the system, the stronger the pipe hangers, and the more expensive they become. So, by considering the weight of a valve, one can also reduce piping system costs.
Physical Size
Butterfly valves take up approximately a sixth of the space of a gate valve. Every cubic foot of a building costs money. For example:
- A 10" butterfly valve is about 21" high
- A 10" iron gate is about 43" high
“Bubble Tight” Shut-Off
Gate and globe (metal to metal) valve seats cannot provide “bubble tight” shut-off. Resilient seated butterfly valves are “bubble tight” by design.
Ease of Operation
Butterfly valves offer a 1/4 turn (90°) open to close. Gate and globe valves require multiple turns to open and close. The ease of opening or closing a butterfly valve means they can employ less expensive operators.
Cost
A butterfly valve is generally 40% the cost of an iron gate valve with not only a low initial cost but a low installation as well.
Maintenance
Properly installed butterfly valves are virtually self-cleaning and are less susceptible to failure due to trash material in the line.
Types of NIBCO Butterfly Valves
NIBCO 2000/3000/5000 Series Butterfly Valves
- Threaded collar bushing (non-removable) for positive stem retention (blow-out proof)
- Body and stem O-ring seals of EPDM, Buna-N, or Fluorocarbon
- Extended neck for insulation up to 2"
- The molded-in liner is fully supported by the valve body at flange seals. This eliminates leakage between the body and liner, as can happen in cartridge or boot-type liners. It provides dead-end service without the need for a flange on the downstream side.
- High-strength stainless steel stem materials with a one-piece thru-disc design
- Upper and lower bushings are standard for smooth valve operation
- Streamlined spherical disc with high flow capacity
- The internal stem/disc drive eliminates the need for pins or bolts, which create additional leak paths, turbulence in the waterway, and/or flow reduction
- The ductile iron body is more durable than cast iron (reduces breakage)
- “Blind-hole” lower bushing prevents leakage
- Pressure rating to 250 psi for 3000 Series, 285 psi for 5000 Series, vacuum to 28" Mercury
- Wide choice of materials to suit any application
- “Bubble tight” shut-off at full pressure rating
- 200/232/250 bi-directional dead-end service rating without a downstream flange required
- Available operation options include bare shaft, lever-lock flow control handle, worm gear operator, electric and pneumatic actuators
- Available body styles: tapped full lug or wafer
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NIBCO LD1000/2000 Series Large Diameter Butterfly Valves
- Ductile iron lug body
- EPDM or Buna-N liner materials
- 14" through 48" size range
- 150/200 PSI WOG
- “Bubble tight” shut-off at full pressure rating
- Bi-directional dead-end service: sizes 14"- 24" at 150 psi and sizes 30" - 48" at 100 psi
- Extended neck for 2" of insulation
- Aluminum bronze, 316SS, or nickel-plated ductile iron disc
- 416 stainless steel stem
- Designed to meet MSS SP-67 standard
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NIBCO WC/LC-2000 Series Cast Iron Butterfly Valves
- Cast iron lug or wafer body
- EPDM liner materials
- 2" through 12" size range
- 200 PSI CWP
- “Bubble tight” shut-off at full pressure rating
- Aluminum bronze disc
- 416 stainless steel stem
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NIBCO N-200 Series Cast Iron Butterfly Valves
- Cast iron lug or wafer body
- EPDM or Buna-N liner materials
- 2" through 12" size range
- 200 PSI CWP
- “Bubble tight” shut-off at full pressure rating
- Aluminum bronze, nickel-plated ductile iron disc, or nylon-coated ductile iron disc
- 416 stainless steel stem
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NIBCO GD-4765 & GD-4865 Series Grooved Butterfly Valves
- Polyamide coated ductile iron body
- Elastomer encapsulated disc (EPDM or Buna-N)
- Maximum temperature ratings of 200°F for EPDM disc and 180°F with Buna-N disc
- 416 stainless steel stem
- 300 PSI WOG 2" through 10"
- 175 PSI WOG 10" UL/FM
- UL & ULC listed, FM approved
- 2-1/2" through 10" UL listed for indoor and outdoor service
- UL/FM version accepts internal supervisory switches
- Designed to meet MSS SP-67 standard revised 10/14/2019
- End connection per AWWA C606
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NIBCO FC-2000 & FD-5000 Series Flanged Butterfly Valves
NIBCO flanged butterfly valves dimensionally replace the:
- Gate Valve
- Ball Valve
- Plug Valve
- Spooled Butterfly Valve
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NIBCO LCS-6822 & LCS-7822 Series High-Performance Butterfly Valves
These butterfly valves are ideally suited for commercial, industrial, and mechanical HVAC applications.
Applications:
- Heating hot water
- Condenser water
- Glycol
- Chilled water
- Compressed air
- Steam rated: 2" - 12" 150 psi for on/off applications and 50 psi modulating
- Vacuum to 27" Hg
- Chemical process
- Isolation and throttling
- Domestic water
Materials & Construction:
- Body constructed of carbon steel
- Stainless steel disc and stem
- Seats of reinforced PTFE for exceptional chemical and heat resistance
- Welded disc pins
- Silicon is not used in the manufacture of this valve
Features:
- Powder-coated epoxy finish
- One-piece stem
- Direct mount actuation
- Live loaded adjustable packing with a unique flush-mounted packing gland
- Integrally cast disc-stop
- Dual offset design
- Blow-out proof stem
- Uni-directional dead-end service (arrow on body indicates flow direction)
- Maximum operating temperature of 400°F at 100 psi
- 100% production tested per MSS SP-68
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NIBCO Sure Seal High-Performance Butterfly Valves
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NIBCO Sure Seal Lined High-Performance Butterfly Valves
NIBCO offers a comprehensive selection of lined butterfly valves for industrial and commercial applications that are available in a broad range of materials, sizes, and pressures. They feature:
- MPTFE lining with a minimum thickness of 3mm
- Reduced liner cold flow
- Robust body construction
- “Bubble tight” shut-off at full pressure rating
- External corrosion protection
- Mechanical shaft sealing mechanism
- Disc swing clearance compatible with PTFE and other fluoropolymer-lined piping systems
- ISO 5211 mounting flange
- Suited for chlorine gas service
Download the NIBCO Sure Seal Lined Butterfly Valve Catalog
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