Eccentric Telescopic Butterfly Valve

 

High-performance eccentric butterfly valve featuring an integrated telescopic compensation function, designed for high-temperature, high-pressure, and abrasive media applications in critical industrial systems.

 

 

Eccentric mechanism eliminates friction completely. The disc lifts before rotating. This prevents seat wear effectively. Telescopic design allows length adjustment. It compensates for pipeline misalignment. Both technologies work harmoniously.

Triple eccentric design provides superiority. It adds angular offset geometry. This ensures zero leakage performance. It handles extreme temperatures perfectly. Reliability remains unquestionable.

Ductile iron offers exceptional strength. Stainless steel parts resist corrosion. Multiple seal materials available. These include reinforced PTFE. They suit various media types.

 

Eccentric design: Double or triple offset structure eliminates friction between disc and seat, ensuring long service life and torque-free sealing.
Integrated telescopic function: Built-in expansion joint compensates for pipeline thermal expansion and contraction, simplifying installation and reducing stress.
Metal sealing option: Available with stainless steel or stellite-faced seal for extreme temperatures and erosive media.
Zero leakage performance: Achieves bidirectional bubble-tight shutoff (API 598 Class VI) under high differential pressure.
Fire-safe design: Conforms to API 607 and ISO 10497 standards for emergency shutdown conditions.
High cycle life: Optimized bearing and stem design ensures reliable operation over 100,000 cycles.

 

 

We test chemical composition initially. Hardness verification comes next. Dimensional checks use CMM machines. Pressure testing exceeds standards. Cycle life testing continues. Leak detection uses helium gas. Final certification gets issued.

 

 

Verify pipeline preparation first. Check valve orientation properly. Clean flange faces thoroughly. Position valve correctly. Adjust telescopic length. Align bolt holes accurately. Tighten bolts crosswise. Test operation completely.

 

Item Specification
Valve Type Eccentric Telescopic Butterfly Valve
Design Type Double Offset / Triple Offset
Nominal Size DN200 – DN3000
Pressure Rating PN6 / PN10 / PN16 / Class150
Face-to-Face Length Adjustable (Telescopic compensation: 50–150 mm)
Temperature Range -40°C to +600°C (depending on seat material)

 

Typical Applications:
• Long-distance heating networks and district cooling systems
• Thermal power plant steam and condensate lines
• Oil and gas pipelines (crude oil, refined products)
• Metallurgical and mining slurry handling
• Marine and offshore platform piping systems
• High-temperature flue gas desulfurization (FGD) systems

 

 

Parameter	Specification Details
Product Designation	Eccentric Telescopic Butterfly Valve
Body Material	Ductile Iron EN-GJS-500-7
Disc Material	Stainless Steel 316L
Stem Material	Stainless Steel 17-4PH
Seat Material	Stainless Steel + RPTFE
Size Spectrum	DN80 - DN1600
Pressure Classes	PN16 to PN100
Temperature Limits	-60°C to 425°C
Telescopic Range	±25mm
Operation Methods	Gear, Electric, Pneumatic

 

 

We use engineered wooden cases. VCI paper prevents corrosion. Custom foam inserts cushion. Steel reinforcements strengthen. Weatherproof wrapping protects. Barcode labels track.

 

 

We provide detailed documentation. Installation supervision available. Operational training offered. Spare parts stocked. Emergency support ready. Performance monitoring possible.

 

 

 

• Gear operator with locking device for manual control
• Electro-pneumatic positioners (4-20mA / HART / Fieldbus)
• Smart electric actuators with fail-safe (FC/FO) function
• Extended bonnets for high-temperature insulation
• Purge connections for slurry or viscous media
• Bypass assemblies for pressure equalization