Technical Specifications
| Parameter | Range |
|---|---|
| Size Range | DN50 - DN3000 (2" - 120") |
| Pressure Class | 150LB - 600LB (PN10 - PN100) |
| Temperature Range | -196°C to +650°C (depending on seat/disc material) |
| Body Materials | Cast iron, ductile iron, WCB, CF8, CF8M, CF3, CF3M, LCB, LCC |
| Disc Materials | Stainless steel, duplex steel, bronze, titanium, Stellite-coated |
| Seat Materials | EPDM, NBR, PTFE, RPTFE, metal-to-metal (Stellite), Devlon |
| Stem Materials | Stainless steel 2Cr13, SS304, SS316, 17-4PH |
| Operation | Manual lever, worm gear, electric actuator, pneumatic actuator, hydraulic |
| End Connections | Wafer, lug, double-flange (RF), butt weld |
| Design Standards | API 609, EN 593, ISO 5211, GB/T 12238, DIN 3354 |
| Fire Safe | API 607, API 6FA compliant (metal seated) |
Butterfly Valve Product Range
Lianggu Valve Group offers 20+ butterfly valve models across multiple series:
1. Triple Eccentric Series
Triple Eccentric Metal Hard Seal
Metal-to-metal sealing with triple eccentric design. Zero friction, bubble-tight shut-off, long service life. For high temperature and critical service.
- Size: DN150 - DN3000
- Pressure: 150LB - 600LB
- Temp: up to +650°C
- Seat: Stellite alloy
High Pressure Butterfly Valve
High pressure rated triple eccentric design for power and petrochemical applications.
- Size: DN100 - DN1200
- Pressure: 300LB - 600LB
- Metal seated
- API 609 compliant
2. High Performance Series
High Performance Wafer Butterfly Valve
Double-offset design with resilient or metal seat. Low torque, fire-safe, suitable for oil & gas and marine applications.
Double OffsetWaferFire SafeStainless Steel Flange Butterfly Valve
Flange-type butterfly valve with stainless steel body and disc. Corrosion resistant for chemical and marine applications.
FlangeSS304/SS316Corrosion ResistantWafer Butterfly Valve
Wafer-style butterfly valve for compact installation between pipe flanges. Resilient seat for water and HVAC.
WaferResilient SeatHVACLug Butterfly Valve
Lug-type butterfly valve with threaded inserts for dead-end service. Easy installation and removal.
LugDead-endEasy Install3. Actuated Series
Electric Butterfly Valve
Electric actuated butterfly valve for automated flow control. IP67 housing, modulating or on/off control.
ElectricAutomatedIP67Pneumatic Butterfly Valve
Pneumatic actuator with rack-and-pinion or scotch-yoke design. Fast operation, fail-safe (spring return) option.
PneumaticFast OperationFail-safeHydraulic Control Butterfly Valve
Hydraulic actuated butterfly valve for large diameter water and gas pipelines. Precise control and high torque.
HydraulicLarge DiameterHigh Torque4. Special Application Series
Special Butterfly Valve for Coal Gas
Designed for coal gasification and syngas systems. Abrasion resistant, high temperature, metal seated.
Coal GasAbrasion ResistantHigh TempElectric Aeration Butterfly Valve
For aeration and powder/granular material handling. Special disc and seat design for solid media.
AerationPowderSolid MediaButt Welding Butterfly Valve
Butt-weld end for buried and high-pressure applications. Zero external leakage, compact installation.
Butt WeldBuriedZero LeakIndustry Applications
- Water & Wastewater: Distribution mains, pump discharge, treatment plants — Wafer/lug butterfly valves
- HVAC: Cooling water, chilled water, heating systems — Resilient seated butterfly valves
- Power Generation: Cooling water, FGD systems, ash handling — Triple eccentric, high performance butterfly valves
- Oil & Gas: Tank farm, terminal, transmission — Fire-safe, metal seated butterfly valves
- Marine: Ballast, cooling, cargo systems — Stainless steel, lug-type butterfly valves
- Chemical Processing: Reactor feed, transfer lines — Stainless steel, PTFE-lined butterfly valves
- Power & Cement: Coal gasification, syngas, dust handling — Special coal gas butterfly valves
Butterfly Valve FAQ
What projects is Butterfly Valve suitable for?
Butterfly Valve is compact and cost-effective for large-diameter flow control and commonly used in water treatment, HVAC, chemical utilities and large-diameter pipelines. If you are not sure about the model, send us the working condition first.
What happens if the wrong butterfly valve is selected?
The common risk is seal type, disc material and operation method affect service life. Valve selection is not only about size and price; medium, pressure, temperature and standards must be reviewed together.
What information is needed to quote butterfly valve?
Please provide size, pressure class, material, connection, medium, temperature, quantity, operation method, standard and certificate/testing requirements.
Can butterfly valve be customized?
Yes. Non-standard size, special material, sealing structure, connection, actuator, inspection documents and packing requirements can be discussed by project.
How is butterfly valve tested before shipment?
According to standards and order requirements, shell pressure, seat sealing, appearance, dimensions and documents can be checked. ITP, NDT, material and calibration documents can also be supported.
Can project documents be provided for butterfly valve?
Yes. Drawings, quality plan, ITP, material certificates, inspection reports, pressure test records, NDT/calibration/certificates can be prepared according to order requirements.
What is the delivery time for butterfly valve?
Regular stocked models can be arranged faster. Non-standard, special material, high-pressure or batch orders depend on technical confirmation and production schedule.
Why do prices vary so much for the same butterfly valve?
Differences usually come from material, pressure class, sealing structure, standard, testing requirements, actuator and document package. Technical conditions should be aligned before quotation.
What is often ignored when buying butterfly valve?
The most ignored part is site condition. Is the medium corrosive? Does temperature fluctuate? Is operation frequent? Is third-party inspection required? All these affect selection.
What if I only know the working condition, not the model?
No problem. Send medium, pressure, temperature, size, connection standard and quantity. We can first check whether Butterfly Valve is suitable.
Need a Butterfly Valve Solution?
Our engineering team can recommend the optimal butterfly valve type, material, and actuator for your application. API 609 and EN 593 certified.
Email: info@chlgvalve.com Call: +86-15601794339