مشغلات كهربائية مقاومة للانفجار من IP67

Flameproof On/Off Isolation Duty (تصنيف S2)

Engineered for emergency shutdown (ESD), tank farm tank-blanketing, and main pipeline isolation valves. Operates high-torque ball valves, صمامات السدادة, and butterfly valves with mechanical travel and torque switches certified spark-free under full motor stall conditions.

• Rated for Zone 1, المنطقة 2 (غاز) and Zone 21, Zone 22 (Dust)
• Double-reduction gear train with internal mechanical stops
• SIL 2 / SIL 3 capable for safety instrumented systems

Flameproof Modulating Control Duty (تصنيف S4)

Engineered for continuous chemical throttling, gas compressor bypass, and refining blending lines. Features solid-state servo control electronics enclosed within flameproof housings, handling up to 1,200 starts per hour with analog 4–20 mA or digital fieldbus commands.

• High positioning precision within ±0.5% full scale
• Non-intrusive magnetic/infrared calibration (zero hot-work permit needed)
• يدعم RTU مودباس, هارت, and Profibus DP in hazardous zones

Certified ATEX & IECEx Flameproof

Certified to Ex d IIC T4/T6 Gb standards, covering the most volatile gas groups (including Hydrogen, Acetylene, and Ethylene). Capable of containing internal deflagrations without transmitting ignition energy to surrounding plant areas.

Precision-Machined Flame Paths

All mating cover flanges, cable penetrations, and drive shaft bushings feature ultra-precise cylindrical and spigot flame paths. These micro-clearance metal paths cool escaping combustion gases below ignition temperature before reaching the exterior.

Non-Intrusive Magnetic Setup

Technicians can calibrate travel limits, set torque thresholds, and view diagnostics through the explosion-proof tempered glass window using an external magnetic or infrared tool—eliminating hazardous hot-work permits on active refineries.

IP67 Weatherproof Protection

Beyond explosion-proof ratings, dual O-ring Viton seals provide certified IP67 ingress protection. Completely dust-tight and resistant to torrential rain, heavy offshore ocean spray, and temporary washdown immersion per IEC 60529.

Separate Ex d Terminal Compartment

Features an isolated flameproof wiring compartment separated from the primary motor and electronics chamber. Comes standard with explosion-proof threaded cable ports (NPT or Metric) designed for certified Ex d barrier glands.

Safe Declutchable Manual Override

Equipped with a spark-free bronze/stainless steel declutch mechanism and manual handwheel. The internal clutch disengages automatically when the electric motor is energized, ensuring complete operator safety during sudden remote actuations.

1. What is the difference between an Explosion-Proof (إكس د) and an Intrinsically Safe (Ex i) المحرك?

الأمان الفطري (Ex i) equipment operates on ultra-low electrical energy that is physically incapable of causing a spark. Because industrial electric valve actuators require substantial electrical power to drive high-torque motors, they cannot be intrinsically safe. بدلا من ذلك, they utilize Flameproof (إكس د) construction: heavy-walled metal enclosures designed to safely contain and cool any internal electrical explosion without permitting flame transmission to the surrounding atmosphere.

2. Why is non-intrusive calibration crucial in hazardous refinery environments?

In active oil, غاز, and chemical plants, opening an electrical enclosure exposes live electronic components to surrounding volatile vapors, requiring an expensive, time-consuming plant shutdown and formal "Hot Work Permit." DELCO non-intrusive actuators feature external magnetic or infrared calibration, allowing technicians to commission travel limits, عتبات عزم الدوران, and bus communications through the glass window safely while the plant remains live.

3. What hazardous gas groups and temperature classes are covered under Ex d IIC T4?

ال IIC gas rating is the most demanding classification, covering highly volatile gases such as Hydrogen (H2) and Acetylene, in addition to Group IIB (الإيثيلين) and Group IIA (Propane/Methane). ال T4 temperature rating guarantees that no exterior surface of the actuator will exceed 135°C under the most severe continuous duty cycles, ensuring surface temperatures stay safely below the ignition threshold of surrounding ambient gas mixtures.

4. What cable gland specifications are required to maintain the actuator's Ex d rating?

To uphold flameproof certification, field wiring must be installed using certified ATEX/IECEx Ex d barrier cable glands or conduit stopping boxes with approved setting compound. Using standard industrial glands compromises the flame path, creating a potential ignition hazard. DELCO actuators come standard with precision-machined NPT or Metric threaded conduit entries accompanied by certified Ex d metallic blanking plugs.