Pneumatic Butterfly Valves
Compact, Lightweight, High-Capacity Flow Control
KINKO Pneumatic Butterfly Valves
KINKO pneumatic butterfly valves deliver high flow capacity in a compact, lightweight package. Designed with wafer and lug configurations, these valves provide reliable on/off and throttling control for water, air, gas, and light slurry applications across municipal and industrial facilities.
Behind Every Solution:
- Low pressure drop, high Cv values
- Two-way sealing with zero leakage performance
- Reduced installation space and piping support requirements
- NBR, EPDM, PTFE, FPM for media compatibility
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Pneumatic Butterfly Valve
Model
Nominal Diameter
Pneumatic Soft Seal Butterfly Valve
Model
D671X(F, F4, J)-PN6.0, 10
Nominal Diameter
DN50~DN1200
Pneumatic Tri-eccentric Butterfly Valve
Model
D673H (F, Y)
Nominal Diameter
DN40~DN1200
Pneumatic Flange Butterfly Valves
Model
D641X-16C
Nominal Diameter
DN50~DN600
Pneumatic Wafer Butterfly Valve
Model
D671X-16C
Nominal Diameter
DN40~DN300
Pneumatic Flange Triple Eccentric Butterfly Valve
Model
D643 (H,Y,F) - 16 (1.6Mpa)
Nominal Diameter
DN50~DN800
Sanitary Pneumatic Butterfly Valve
Model
D681X-10P/R
Nominal Diameter
DN15-DN100
Pneumatic Flange Butterfly Valves
Model
Nominal Diameter
DN50~DN1000
Pneumatic Plastic Butterfly Valve
Model
D671X-PN10
Nominal Diameter
DN65~DN200
Design Principles
Why are KINKO Pneumatic Butterfly Valves so durable?
- The disc rotates 90° to modulate or shut off flow, providing fast response
- Offset disc design reduces seat wear and extends cycle life
- ISO 5211 mounting pad simplifies actuator installation
- The thin-disc design saves installation space between flanges.
- The lug-type design supports dead-end operation and isolates the downstream piping.
- The pinless disc design eliminates leakage paths and improves reliability.
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The Core Advantages of KINKO Pneumatic Butterfly Valves
High flow capacity (Cv)
Low pressure drop for energy-efficient operation.
Bi-directional zero leakage
Two-way sealing with zero leakage performance.
Wafer and lug designs
Space-saving wafer or dead-end service lug options.
Multiple seat materials
NBR, EPDM, PTFE, FPM for media compatibility.
Pin-less disc design
Eliminates leak paths and reduces maintenance.
ISO 5211 mounting
Simplified actuator installation and interchangeability.
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FAQ
What is the difference between concentric and double-offset butterfly valves?
Concentric (zero-offset) butterfly valves have the stem centered in the disc, suitable for low-pressure and general service. Double-offset butterfly valves have two offsets, reducing seat wear and extending service life, ideal for higher pressures and temperatures. Triple-offset designs are available for severe service with metal seats.
What is the difference between wafer and lug-style butterfly valves?
Wafer-style valves are installed between flanges with through-bolts, requiring full piping support. Lug-style valves have threaded inserts on both sides, allowing dead-end service and removal of downstream piping without affecting valve position. Lug-style is preferred for isolation applications.
What sealing materials are available for pneumatic butterfly valves?
KINKO offers NBR (oil and general service), EPDM (water and mild chemicals), PTFE (corrosive media), and FPM/Viton (high-temperature and hydrocarbons). Material selection depends on media type, temperature, and pressure requirements.
Can pneumatic butterfly valves be used for modulating control?
Yes. Pneumatic butterfly valves with positioners provide accurate modulating control (±1% accuracy). The disc rotation provides approximately linear flow characteristic, suitable for flow and pressure regulation in water treatment, HVAC, and industrial processes.
What is the maximum temperature and pressure rating?
KINKO pneumatic butterfly valves handle temperatures from -20°C to +180°C (PTFE seat). For metal-seated designs, temperatures up to 400°C are available. Pressure ratings range from PN10 to PN40 (Class 150 to Class 300) depending on size and configuration.
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