Electric Triple Offset Metal-Seated Butterfly Valve
Designed on the triple offset principle, with a multi-layer valve seat that combines hard and soft sealing. Precision machined, with an advanced process. The valve consists of body, disc, multi-layer seat, stem and transmission mechanism.
PN10 / PN16
IP67 actuator
−20°C ~ 100°C
Electric + manual
Triple Offset Design, Sealing Guaranteed
The triple offset geometry optimises the movement path of the sealing surfaces, so that they run without friction and without interference. Combined with a properly selected sealing material, this reliably guarantees the sealing performance, corrosion resistance, high-temperature resistance and wear resistance of the butterfly valve.
Structure
Body, disc, multi-layer valve seat, stem and transmission mechanism form the complete valve. The multi-layer seat is compatible with both hard and soft sealing, which keeps the torque low while maintaining a reliable metal-to-metal seal.
Sealing principle
Because the valve is designed on the triple offset principle, the spatial movement path of the sealing surfaces is optimised. The seat and the disc sealing surfaces have no friction and no interference during opening and closing, which extends service life and keeps the sealing torque stable.
The result is dependable performance in clean liquid, gas and oil service, with electric actuation and manual override.
Advantages of the Electric Butterfly Valve
01
Simpler installation
Only the power supply has to be connected — no air line is needed.
02
Multiple power options
24V, 110V, 220V and 380V power supplies are available.
03
High control accuracy
Easily configured as a modulating (regulating) type valve.
04
No compressed air required
It works wherever power is available — ideal for sites without an air compressor station.
05
Smooth start and stop
Well suited to remote automatic control, PLC and DCS systems.
06
Manual operation on power failure
Emergency backup keeps the line running, with no downtime.
About the Valve Electric Actuator
The valve electric device (electric actuator) is the core equipment for automatic valve control. It is widely used in the petroleum, chemical and power industries. The product adopts a modular design with a compact structure and standard interfaces, so an old manual valve can be upgraded to automatic operation quickly, which greatly shortens the modification period.
The product has an explosion-proof structure (Exd IIC T4 Gb) and is suitable for flammable and explosive hazardous areas. It responds quickly and runs reliably, supports remote control and connection to intelligent systems, and provides industry piping systems with a safe, efficient and convenient automation solution.
Key Data
Layer-by-Layer Inspection, Quality Guaranteed
Six inspection steps before every valve leaves the factory: incoming metallographic inspection, spectrometer material test, ultrasonic wall thickness test, coating thickness gauge test, pressure and sealing test, actuator commissioning.
ALTAS vs. Others
| Item | ALTAS | Comparison |
|---|---|---|
| Valve connection | Single-shaft, pinless design. Reliable pressure bearing, longer service life. | Not torque resistant, easy to corrode and fracture. |
| Casting | Coated sand casting / forging. Metallographic and spectrometer multi-layer inspection. | Sand holes, blowholes and other defects increase the risk of leakage. |
| Quality inspection | Pressure and sealing test plus actuator commissioning on every unit. | Only partial testing. |
| Paint coating | Epoxy resin electrostatic spraying, customized finish, better rust protection. | Simple spraying, thin film, easy to peel and rust. |
| Valve performance | Full wall thickness, good elasticity, controllable sealing. | Thin wall, weak elasticity, poor sealing. |
| Actuator | High-performance actuator, commissioned against the valve, precise and reliable. | Insufficient torque, slow action, jamming, high failure rate. |
High-Performance Electric Actuator
- HousingHard aluminium alloy housing, anodized and polyester powder coated, with strong corrosion resistance. Protection class IP67, NEMA 4 and 6, with IP68 available as an option.
- MotorFully enclosed squirrel-cage motor: small size, high torque, low inertia. Insulation class F, with a built-in thermal overload switch that prevents the motor from overheating damage.
- Manual overrideThe handle is designed to be safe, reliable, effort-saving and compact. When the power is off, the handle can be used for manual operation. When manual operation is not needed, the handle is placed in the handle clip for convenient use.
- Position indicatorMounted on the central shaft so the valve position can be observed. The convex lens design prevents water accumulation and makes observation easier.
- Anti-condensation heaterUsed to control temperature and prevent moisture condensation inside the actuator caused by temperature and weather changes, keeping the internal electrical components dry.
- SealingGood sealing performance. Standard protection class is IP67, with IP68 available as an option.
- Limit switchesMechanical and electronic dual limits. The mechanical limit screws are adjustable, safe and reliable. The electronic limit switch is controlled by a cam mechanism; the simple adjustment mechanism sets the position precisely and conveniently, and is not affected by excessive handwheel travel.
- Self-lockingThe precise worm gear mechanism transmits high torque efficiently, with high efficiency, low noise (max. 50 dB) and long service life. The self-locking function prevents reverse rotation; the transmission part is stable and reliable and needs no re-greasing.
- Captive boltsWhen the housing is removed, the bolts remain attached to the housing and will not be lost.
- MountingBottom mounting dimensions conform to ISO 5211 / DIN 3337. The double-square holes allow linear or 45° mounting of valves with a square stem, giving strong adaptability. The actuator can be installed vertically or horizontally.
- WiringThe control circuit conforms to single-phase or three-phase power standards. The wiring layout is compact and rational, and the terminals effectively meet the requirements of various additional functions.
Dual Explosion-Proof Certification, Safer and More Assured
Long service life
Imported BNGER micro switch, strict and precise workmanship.
Smooth manual / automatic switching
Multiple voltages and models available: 220V, 24V, 380V, 110V, 12V — on-off type, modulating type, waterproof type and explosion-proof type.
Alloy steel gear
High-precision alloy steel for high torsional strength.
Safe overheat protection
Full copper coil and safe overload protection for the motor.
Product Parameters
| Model | D941X / D971X / D971XP-A2 |
|---|---|
| Drive | Electric actuator |
| Nominal diameter | DN50 ~ DN1200 |
| Nominal pressure | PN10, PN16, or customized to working conditions |
| Medium | Clean liquid, gas, oil |
| Medium temperature | −20°C ~ 100°C |
| Ambient temperature | −20°C ~ 80°C |
| Connection | Flanged / wafer, GB / DIN |
| Protection class | IP55, IP65, IP67 |
| Explosion-proof class | Optional Exd IIC T4 Gb |
| Power supply | 24VDC / 110VAC / 220VAC / 380VAC |
| Operation mode | Electric + manual |
| Body material | Carbon steel (C), stainless steel (P4, P6) |
| Actuator type | QT, QH |
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ALTAS VALVE — industrial valve manufacturer and exporter, serving oil & gas, chemical, power, water treatment and marine projects worldwide.
