Match With Butterfly Valve
Product Structural Features
In addition to the working media that conventional valves are adapted to, high-performance butterfly valves use different structural materials and special treatment materials according to different media. They can also be used in special working conditions such as cryogenics, steam, oxygen, high vacuum, and corrosion resistance.
Valve Overall Structure
There is a reliable shaft retaining ring in the middle of themanual valve
The actuator can be mounted directly and rigidly
PTFE V-shaped packing. graphite asbestos packing alsoavailable
Body inserts prevent seat wear and corrosion
The rotation of the butterfly plate does not take the valve seat asthe fulcrum, which reduces torque and valve seat wear.
The butterfly plate design allows this valve to have a lowermaximum torque point than conventional valves
The flat top of the shaft shows the correct position of thebutterfly plate
Adjusting the packing will not load the valve seat
PTFE-lined stainless steel bearings are highly corrosion-resistantand self-lubricating
Thrust washers maintain the center position of the disc
The welded pin prevents choke, eddy currents and it will notloosen due to vibration.
The pin connection between the shaft and butterfly valvereduces shear stress to a minimum and avoids leakage.
Product Features
Fire resistant construction
Fire-resistant valves are fire tested in accordance with API 607 4th Edition and BS 6755 Part 2.
The shaft is fixed and reliable
The top of the 2"-24" (DN50-600) shaft is equipped with a fixed ring to prevent the upper part of the shaft from moving out of the gland when the shaft breaks accidentally.
CE marked valves available
Valves that comply with the European Community Pressure Vessel Directive (PED) 97/23/EC, with CE marking and documentation, are available. The valve structure is ANSi Class 150 or Class 300 standard or fireproof. Its operating torque, construction options and valve dimensions are exactly the same as standard ANSI Class 150 and Class 300.
Valve seat is easy to repair and maintain
The valve seat can be replaced by simply removing the insert without disassembling the butterfly plate and shaft.
Both switches and controls
1. Has excellent control characteristics. 2. Equal percentage change in flow characteristic curve 3.Wide adjustment range. 4. Can still be tightly sealed even when used for control 5. The standard single flange butterfly valve with lugs can be used at either end of the pipeline terminal within the entire pressure and temperature range.
Complete supply, unified responsibility
1. The valve driving device and accessories can be installed together and provided uniformly. 2. Can be provided with electric devices, worm gear devices, double-acting pneumatic devices or reset pneumatic devices such as springs, as well as various accessories, including limit devices, solenoid valves and positioners. 3. Provide OEM services.
Technical Parameters
1. Valve seat rating The valve seat rating indicated on the curve table is for the valve seat only and is based on the pressure difference across the disc when the valve is fully closed. These ratings serve as a guide for use under common conditions. Based on past experience, through improvements and changes to other valve seat materials, the ratings used can be higher. 2. Valve body rating The maximum operating pressure of the valve body and the test pressure of various valve body materials are shown in the valve body pressure rating table below. The actual operating pressure is determined based on the valve seat rating. The test pressure is the pressure of the static pressure test when the butterfly plate is opened.
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