RBO, RD, BP, LS, XO, DH, RTS, Radial Tip: industrial radial blade blowers are supplied in welded heavy gauge steel construction to prevent flexing at high pressure. Blowers are available in direct drive arrangements 4/4V/4H/7/8 and belt drive arrangements 1/3/9/10. Arr. 10 blowers are known as ventilating sets (vent sets). Available in single width single inlet (SWSI), or double width double inlet (DWDI). Fan capacities: to 500,000 CFM. Static pressure up to 100 inches water gauge depending on the class of construction. Typical class of construction is Class 1, 2, 3, 4, 5.
Aluminum blower wheel, Steel wheel, or Alloy wheel: industrial radial blowers and fans are supplied with aluminum wheel or corten wheel to meet requirements of AMCA A, and AMCA B spark resistant construction. Mild steel wheels are of all welded construction. They are used on pressure applications, material handling applications (plastic scrap, paper trim, granular material, low density bulk material) where wheel is reinforced with support gussets, or made of abraision resistant construction, or furnished of high strenght steel. Stainless steel wheel in 304 SS, 316 SS, 316 SS, 2205 SS are supplied for corrosive applications, or high temeparature applications. The pressure curve remains stable from fully open to fully closed position.
Inlet flanges, outlet flanges, companion flanges: continuosly welded to match ANSI class 125/150, DIN, ISO, or custom hole pattern.
Shaft seal and low leakage fan / blower construction: shafting is straightened to close tolerance to minimize "run-out" and ensure smooth operation. Teflon fan shaft seal, ceramic shaft seal and lubricated shaft seals (Buna, Teflon, Viton) are standard. Red silicone gasketing is provided for low leakage construction and for high temperature construction. Heavy-duty spherical roller bearings are standard.
Heat fan construction up to 1500 F: includes high temperature paint (up to 1000 F), special alloy construction, shaft cooler, shaft-cooler guard, and steel wheel, or alloy wheel, with steel, or alloy housing.
Cladding for sound attenuation and silencers: cladding consists of 2 inches mineral-wool insulation covered with a welded steel jacket. As an inexpensive alternative is offered slide-on acoustic cloth jackets. Inlet silencer/outlet silencer are supplied with matching flanges for further attenuation of the noise level.
Blower inlet filter assemblies: cell type, 1 inch, or 2 inch filters are available with filter cabinet to be mounted at fan inlet. Bird guard, insect screen and weather hood are optional accessories with inlet filter package.
Standard blower and fan accessories: flash
/ raised access door, inspection port, drain and plug, unitary base,
shaft and bearing guard, belt guard, motor cover, spring vibration
isolation, rubber-in-share (RIS) vibration isolation, vibrating pads,
outlet damper, inlet vane damper, external inlet vane damper, evase,
electrical / pneumatic actuators.
Supplier of regenerative
blowers, positive displacement blowers, Acme fans, Delhi fans,
fiberglass fans / FRP blowers, Plastec Propylene fan ventilators,
American Coolair ILG ventilators & fans, Grainger ventilators,
explosion proof blowers, power roof ventilators, replacement fan bldes
/ blower wheels.
As an intermediate step between standrard fan design and air-tight design, NISCO offers a few stages of low leakage construction on fans and blowers - for industrial cusomers calling to minimize leakage fans due to the presence of toxic or corrosive gases in the airstream. As some system requirements are more stringent than others, and since some of the necessary modifications can be rather expensive, a few levels of Low Leakage Fan Construction are offered to choose from:
1) Heavy gauge housing construction with solid housing drive side, Neoprene Gasketing, and Viton, or Buna-N Rubber lip type shaft seal.
2) Full face sheet gasketing, Red Silicone or White Nitrile.
3) Contiunuosly welded fan housings;
4) Gas-purged mechanical shaft seals in lieu of lip seals - for greater sealing capability at the shaft hole opening.
By using exhaust fans to
ventilate your building efficiently and completely, thereby improving
indoor air quality, you can avoid of all these problems.