PXK(Pz) Series Explosion Proof...
- ◆ Designed for Zone 2 applications, this explosion-proof pressurized distribution cabinet adopts a dual-chamber configuration: a main chamber for electrical equipment and a secondary chamber for pneumatic components.
- ◆ Continuous air circulation ensures consistent heat removal from operational electrical elements, providing reliable cooling performance.
- ◆ PZ series pressurized distribution cabinets for hazardous area are marked with purge time and flow rate data, and incorporate throttle and safety valves. The control system is purely pneumatic, requiring no electrical supply.
- ◆ Optional stainless steel welded construction delivers superior corrosion resistance, making the cabinet for explosive atmospheres suitable for severely corrosive conditions..
TECHNICAL DATA
Explosion Protection Type
Standards: CENELEC, IEC, NEC
Zones:
Zone 1 and Zone 2
Zone 21 and Zone 22
Product Parameters
Explosion protection:
IECEx(Gas and dust): Ex pzc IIC T5 Gc
Ex pzc IIIC T95°C Dc
ATEX(Gas and dust): $\text{Ex}$ II 3 G Ex pz IIC T5 Gc
$\text{Ex}$ II 3 D Ex pD IIIC T95°C Dc IP66
CU-TR(Gas and dust): 2 Ex pz IIC T6 Gc / Ex tb IIIC T80°C Db IP66
2 Ex pz IIC T4 Gc / Ex tb IIIC T130°C Db IP66
Product Type: PXK-pz
Material: Enclosure: Stainless steel or powder coated carbon steel
Positive pressure value: 200Pa~800Pa(0.002bar~0.008bar)
Air source: 0.2MPa~0.8MPa (2bar~8bar)
Rated voltage: Max.690V AC 50/60Hz, 500V DC
Rated current: Max.630A
Degree of protection: IP66
Ambient temperature:
IECEx, ATEX: -10°C~+55°C
CUTR: -20°C~+55°C(T6/T80°C); -20°C~+75°C(T4/T130°C)
Product Classification & Origin
HS code: 853710
Country of origin: China
Applicable Industries
The explosion-proof pressurized distribution cabinet operates on the principle of ignition source isolation via a pressurized medium. All customer electrical components are enclosed within an enclosure that maintained at a positive pressure with a clean gas medium. This design prevents external flammable or explosive gas mixtures from contacting electrical arcs or hazardous temperatures generated by internal components during operation, thereby achieving electrical explosion protection.
This cabinet for explosive atmospheres is specifically designed for demanding applications characterized by high temperatures, high humidity, and stringent safety requirements, where explosive atmospheres (gases, vapors, or dusts) may be present. It is suited for industries such as petrochemical processing, offshore drilling platforms, pharmaceutical manufacturing, and new energy facilities.
Credibility
Our PZ Series Explosion-Proof Pressurized Electrical Cabinet delivers core advantages: enhanced safety, superior cooling, adaptable design, and smart controls. It is the ideal solution for demanding Zone 1&2 gas and dust hazardous areas, which require fully certified equipment. Engineered to the highest global standards, our certified cabinets for hazardous area is backed by key international certifications (ATEX, IECEx, EAC). Choose our solution to effectively meet your compliance duties and ensure long-term, reliable safety in your operations.
FAQ
Q1: What is “Pressurized” mean and why is it safe?
A1: “Pressurized” means we keep clean air flowing into the cabinet, creating a slight internal overpressure (like a protective bubble). This air barrier safely blocks explosive outside gases or dust from getting inside where electrical equipment operates.
Q2: Where can I use this explosion-proof pressurized distribution cabinet? Is Zone 0 okay?
A2: It is perfectly suited for Zone 1 and Zone 2 explosive gas atmospheres and Zone 21 and Zone 22 combustible dust atmospheres. For the most hazardous Zone 0 (constant risk), a standard unit is not typically the first choice and would require a special safety review.
Q3: Can any standard (non-explosion-proof) electrical equipment be installed inside the pressurized distribution cabinet for hazardous area?
A3: Yes, but with important limitations. While pressurization permits standard components, their maximum surface temperature must not exceed the cabinet’s certified Temperature Class (T-Rating). Furthermore, the total heat generated must be within the cabinet’s rated cooling capacity.
Q4: What happens during operation if pressure drops below the safe level or if main power fails?
A4: Safety is automated. If pressure drops or power fails, the system instantly triggers alarms. If not corrected, it will safely shut down power to internal equipment before any hazardous condition can occur, ensuring failsafe operation.
