China professional roof fan for workshop roof ventilation

professional roof fan for workshop roof ventilation

Product Description

Welcome to GRAD

Ventilator standards drafter,Focus on ventilation fan more than 20 years

Type instruction

(1)The axial roof ventilator have 17 models of Φ300~ Φ1800mm with the diameter varies fromΦ300 to Φ1000

mm of 9 models.We can provide other models for the clients' different requirement.

(2) The structure of the fans refers to the whole installation drawing. This series of fans consist of impellers, ducts, rain cover, driving components, loose-leaf air doors and safety net.

I. Characteristics

Various models, large application scope: 2 models are available according to different pressures, air flow and noise requirement:a. Axial roof fans: model DWT

Ⅰis for medium and low pressure, large volume condition. Its design can be changed into dual-reversible type with the same efficiency (national patent).b. Centrifugal roof fan: two models: DWTⅡ and DWT-Ⅲ. It is applied to provide high pressure while low air volume.

High-efficiency, low-noise: This series uses CAD software, after optimizing design and research, its design has been rewarded patent of utility model and national outstanding patent. Its design adopts different rotate speeds, angles and impellers with the same diameter to satisfy different conditions. In this way, the fans match with the whole system and save energy and bring down noise.Light, high-strength, corrosionresistant: The impeller has different material types for various mediums,

which encompasses ABC (engineering plastics), FRP (glass fiber reinforced plastics) and aluminum alloy sheet. The centrifugal fans are applied for high pressure conditions and the surface of impellers is galvanized & plastic sprayed, lowering its weight and enhancing its corrosive resistance.

4. Stable operation, long-term service: little inertia, precise balance, stable operation make the fan's performance standard higher than its competitors.

Large applying scope: This series fans can be made into explosion-proof, retardant, anti-aging type, etc., for ventilation of the conditions of flammable, explosive and corrosive air .

Elegant appearance: The rain cover is made of FRP with external surface of imported resin film. Its curve is smooth, elegant and practical. It can also be modified by plastic sprayed (PVC) after galvanization.

7. Applying condition: The medium shall not exceed 60°C. No adhesive drifts, no exceeding 100 mg/m3 dust in the air. As for the high temperature medium, we provide fire-fighting exhaust fans (national patent) for the roof fans.

schematic diagram of roof ventilation fan

Packaging & Shipping

Usually we use plywood package or naked package. Some of the products like fan coil unit or table

tennis board have standard carton package. The shipping terms are LCL, 20’ container, 40’ container

Our Services

Before-sale services:

(1) Tell customers how to use our products and matters needing attention.

(2) Guide customers to choose the best and economic product, recover the investment within short time.

(3) Site inspection if you need.

In-Sale services:

(1)Quality control must be inspected strictly.

(2)In accordance with the agreements stipulated in the contract.

After-sale services:

(1) If the project needs our installation guidance, we can send our engineer and translator. We can also send customers installation video to teach them how to fix and operate with

our product.

(2) Usually, our product warranty is 18 months after leaving factory or 12 months after installation. within this months, all parts broken will be responsible for our factory.

(3) Regular contact with customer, consult with the customer feedback, come true with

the customer's two-way communication.

Company Information

Shandong GRAD Group Co.,LTD is established in 1993, located in Dezhou Shandong,

covering an area of 700 thousand square meters, with more than 2500 employees. The

total capital is 925 million RMB, and annual output value over 2.5 billion RMB.During

20 years' development, GRAD Group concentrates on the central air-conditioning and

compound material products and show the world a high-technological enterprise combining

construction budget, technical consultation, products design, manufacturing and debugging

service. There are 10 series, over 130 kinds of products covering the whole central

air-conditioning series and the compound materials series products. The high standard

workshop covering 350 thousand square meters.

Foreign friends

GRAD sincerely welcome all friends visit

contact information