Belimo BU6 Series Butterfly Valve BU680S-LS

Manufacturer: Belimo

Size: 68 DN

Disc & flange pattern: Lug, stainless steel disc

Belimo BU6.. Series Butterfly valves are designed to meet stringent needs of HVAC applications requiring positive shut-off for liquids.

The Butterfly Valve is operated by a Non-spring Return Rotary Actuator, Fail-Safe Mechanical Rotary Actuators or SY Large Torque Multi-function Actuators are available. Select the actuators according to required close-off pressure and HVAC condition of installation. The actuators are controlled by a standard open/close or modulating open/close or modulating control system and rotate the disc of the valve to the position dictated by the control signal.

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Features Applications Model

Double-D-fit of two pieces of non-pin stem connected with disc, a more compact and strong structure, can produce 4-way self-adjusting centralization thanks to its unique design and can optimize & minimize interference-fit, resulting in low operation torque.
Innovative double supports of trench seat can ensure positive assembly among the valve body, seat and disc, and can keep rotation of disc smooth-going consistently and can minimize compressional deformation and seat brushing off.
Advanced ball profile of disc with narrow sealing belt can provide isolation of HVAC flow media from valve body by double-prevention and can eliminate inernal leakage and reduce seat tearing or fatiguing due to bunching. The primary seal is achieved by an interference-fit of the molded seat flat with the disc hub. The secondary seal is created when the stem diameter is greater than internal stem hole.
The nylon-coated disc features excellent anti-corrosion and low friction coefficient with exact casting, precision machining and advanced coated process which give a smooth rotation and close disc-to-seat relationship. The stainless steel disc is a rust proof with hand polishing process can decrease operation torque for actuator and withstand higher
Three anti-corrosion RPTFE (Reinforced Poly Tetra Fluoro Ethylene), EPDM O ring (made of Ethylene-Propylene-Diene Monomer) and stainless steel stem circlip completely isolate flow media from top flange, synchronize rotation between stem and disc, decrease operation torque and ensure extreme long life cycle.
Meet stringent & extensive HVAC flow media with wide & circular arc flange sealing surface, which can be suitable for all flange connection standard as ISO, JIS, AS without additional gasket in AP easily and efficiently.

Typical applications include chiller isolation, cooling tower isolation, change-over systems, air handling unit, fan coil control, bypass and process control.

Mfr. Part No.	Description

Belimo BU6 Series Butterfly Valve BU680S-LS

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