Triple Eccentric Welded Pneumatic Actuator Butterfly Valve DN80-DN1200 PN1.0-4.0MPa

DINKONDA GLOBAL Power Plants Special D663H Series DN80-DN1200, PN1.0-4.0MPa Triple Eccentric Metal Hard Seal Welded Pneumatic Actuator Butterfly Valve

Product Overview
D663H pneumatic butt welded three eccentric metal hard seal butterfly valve adopts groove butt welding connection and hydraulic fork type pneumatic drive. Relying on the principle of three eccentric frictionless metal seal, it has high temperature resistance, high pressure resistance, and resistance to medium erosion. The valve body is directly welded to the pipeline at both ends without a flange gasket structure, reducing the risk of external leakage from the root; Pneumatic drive has fast opening and closing speed, can achieve remote control, can be used as a shut-off valve, and can also be matched with a locator to achieve precise flow regulation. It is widely used in high-temperature and high-pressure welding pipeline systems such as thermal power plants, thermal pipeline networks, metallurgy, chemical engineering, environmental protection and dust removal.

Structural Composition
1. Valve body: made of WCB cast steel material, with standard welding grooves on both ends, and groove dimensions in accordance with GB/T12224 standard. The overall rigidity is strong, resistant to pipeline deformation, and the outer surface is treated with anti-corrosion paint spraying

2. Butterfly plate: Three eccentric structure, sealing surface welded with hard alloy, resistant to erosion and wear, can withstand long-term erosion from media containing trace solid particles

3. Valve seat: replaceable elastic metal hard sealing pair, supporting bi-directional pressure sealing

4. Valve stem: Made of 2Cr13 stainless steel, with high torsional strength and corrosion resistance

5. Drive components: fork type pneumatic actuator, with high output torque and smooth action; Optional solenoid valve, air source triplet, limit switch, pneumatic locator, handwheel emergency mechanism

6. Connecting brackets and fasteners, precise installation and alignment, easy disassembly and maintenance

Product Features
1. Three eccentric frictionless seal
The triple eccentric geometric structure ensures that there is no sliding or scratching between the butterfly plate and the valve seat sealing surface during valve opening and closing, effectively reducing the wear of the sealing pair, extending the service life, and solving problems such as valve jamming, biting, and internal leakage under high temperature conditions.

2. Metal hard seal with high temperature resistance
All metal sealing pair, with a maximum applicable temperature of 425 ℃, suitable for high-temperature steam, thermal oil, high-temperature flue gas, hot air and other media, can transport fluids containing small amounts of dust and solid particles.

3. Bidirectional high-pressure seal
Capable of withstanding bidirectional pressure difference in pipelines, bubble level sealing, and leakage level up to level VI.

4. Butt welding connection
The valve is directly welded to the pipeline groove to eliminate the leakage hazard at the flange connection; The valve body has a compact shape, which facilitates the overall insulation construction of pipelines and is suitable for pipelines with high pressure, large vibration, and long-term uninterrupted operation.

5. Pneumatic automatic control
Fast switching speed and high torque; Installing a locator can achieve 0-90 ° angle adjustment, and can be connected to the automatic control system with a matching solenoid valve and limit switch to achieve remote switching or flow regulation.

6. Excellent circulation performance
Low flow resistance and high flow capacity, which can completely cut off the medium and achieve flow and pressure regulation.

Technical Parameters