Centrifugal Fan, 4-72/B4-72/F4-72, Explosion-Proof, Shenhai

Centrifugal fan — 220V/380V, 380V/220V 50Hz AC Power Supply. The complete factory specification follows. Made by Shenhai Explosion-Proof Technology Co., Ltd. (5 years on the platform, factory-assessed). Quantity and destination market determine the final price — tell us both for a firm quote.

Key Features of This Centrifugal Fan

• Model Number: B4-72
• Power Source Type: 380V/220V 50Hz AC Power Supply
• Voltage: 220V/380V
• Material: Fiberglass Reinforced Plastic (FRP)
• Blade Material: Steel Plate,Cast Aluminum Alloy
• Noise Level: 40 dB and above

Technical Specifications

Product Details

Product Parameters

Explosion proof sign	Degree of protection	Cable outer diameter	Inlet thread
Ex db IIC T4 Gb Ex tb IIIC T135℃ Db	IP54	Φ10~Φ14 Φ15~Φ23	NPT3/4 NPT1 1/4

Product Description

1. The fan transmission methods are categorized into four types: A, B, C, and D. Models No. 2.8 to 5 utilize Type A transmission; Model No. 6 employs both Type A and Type C transmission; Models No. 8 to 12 utilize both Type C and Type D transmission; Models No. 16 to 20 utilize Type B transmission. 2. Ventilators No. 2.8A–6A primarily consist of an impeller, casing, inlet, and motor. Models No. 6C and No. 8–20 incorporate the aforementioned components plus a drive assembly. 3. Impeller: Constructed with 10 backward-curved aerofoil blades, a curved hub cover, and a flat rear disc. Manufactured from steel plate or cast aluminum alloy, it undergoes dynamic and static balancing calibration and overspeed operation testing. Features high efficiency, stable and reliable operation, and excellent air performance; 4. Casing: Available in two configurations. Models No. 2.8–12 feature a monolithic casing that cannot be disassembled. Models No. 16–20 employ a three-piece casing design: split horizontally into two halves, with the upper section further divided vertically along the centerline into two halves connected by bolts. This facilitates impeller installation and removal during maintenance. 5. Inlet: Constructed as an integral structure mounted on one side of the fan. Its cross-section parallel to the axial direction features a curved shape to ensure smooth airflow entry into the impeller with minimal loss; 6. Drive: Consists of the main shaft, bearing housing, rolling bearings, and either a pulley or coupling; 7. Grounding: Grounding screws are provided inside and outside the motor housing for steel pipe or cable wiring.

1. Suitable for Zone 1 and Zone 2 locations in explosive gas environments; 2. Suitable for Class IIA, IIB, and IIC explosive gas environments; 3. Suitable for Zone 21 and Zone 22 locations in explosive dust environments; 4. Suitable for Class IIIA, IIIB, and IIC explosive dust environments; 5. Suitable for temperature classes T1 to T4; 6. Widely used in hazardous environments such as refining, chemical processing, textiles, power generation, as well as offshore oil platforms and oil tankers; 7. Indoor and outdoor use.

About Us

VR

FAQ

A: Are you factory or trading company?

Q: We are a factory and provide OEM services. Our main products are explosion-proof lightings, explosion-proof distribution box, explosion-proof cable gland, explosion-proof fans, explosion-proof junction box and anti-corrosion & dustproof & waterproof lights.

A: What certificates do you have?

Q: We have passed ATEX, IECEx, and with a lot of National Patents.

A: What place are your products used in?

Q: They are widely used in petroleum chemical, aerospace, coal electrical power, railway, metallurgy, shipbuilding, refinery, marine, wine-making, fire fighting, municipal, gas station and other industries.

A: Can I have a sample order?

Q: Yes, we welcome sample orders to test and check quality. Mixed samples are acceptable.

A: Can you accept customized?

Q: Yes. Please inform us and confirm the design firstly based on our sample.

Thanks for your visiting and hope to cooperate! ($10 free for the first order)

contact us

WhatsApp/Skype: +86 159 5719 4752

Mailbox: aurorachen@shenhai-ex.com
Website: https://www.shenhai-ex.com/
Company: Shenhai Explosion-Proof Technology Co., Ltd.
Address: No. 318, Wei15 Road, Economic Development Zone, Wenzhou, Zhejiang, China

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Ordering and Pricing

• Minimum order quantity: 1 piece
• Volume pricing:
  • 1–9 piece: US $175.78 / piece
  • 10–49 piece: US $170.95 / piece
  • 50+ piece: US $165.53 / piece
• Ships from: China
• Customization: OEM and ODM accepted on qualifying volumes.

Frequently Asked Questions

What is the minimum order quantity for this centrifugal fan?

The standard minimum order quantity is 1 piece. Trial orders can usually be arranged for buyers evaluating the product before a full production run.

What warranty is provided?

The manufacturer provides a 3 Years warranty. Spare parts and technical support remain available after the warranty period.

Can the centrifugal fan be supplied for my local voltage?

The standard configuration is 220V/380V. Alternative voltage and frequency builds are available when specified at the time of order.

Do you accept OEM or custom branding?

Yes. Custom logo, colour, packaging and specification changes are accepted on qualifying order volumes. Send your artwork and technical requirements with your enquiry.

How long does production and delivery take?

In-stock configurations typically ship within 7–15 days. Customised or large-volume orders are usually produced in 25–35 days, confirmed on order.

About the Manufacturer

This product is produced by Shenhai Explosion-Proof Technology Co., Ltd., based in China. The company 5 years as a verified Alibaba.com supplier, operates its own manufacturing, passed third-party supplier assessment. Browse the full Shenhai Explosion-Proof Technology Co., Ltd. range on HVACR Nexus.

See more in Centrifugal Fans on HVACR Nexus.