COVID-19

At Morrow Water Technologies, Inc., we value the health and safety of our employees, business partners, and the public. Morrow Water Technologies, Inc. has sought and will continue to seek alignment with the most current Centers for Disease Control and Prevention (CDC) guidance pertaining to coronavirus (COVID-19) precautions. We are currently open and are servicing customers in both our Birmingham and Mobile locations.

SERIES 37, 57 & 58

FIBERGLASS ROOF VENTILATOR

Fiberglass Roof Ventilators are very configurable to meet your air movement needs.  From a heavy-duty unit with the motor out of the airstream, best suited for applications where severe corrosive elements exist or where the versatility of belt drive is required.  To a unit providing an efficient yet economical choice for general ventilation of mildly corrosive atmospheres. This ventilator is not intended for atmospheres where the corrosive concentration is enough to damage the motor. To a design providing complete protection from the elements for exhaust or intake operation.

Series 37:  The unit’s fiberglass duct fan and exterior-mounted motor make it well-suited for fume exhaust. Standard sizes are 12 through 60″. Designed for quiet operation, the Series 37 provides lower sound levels in the highest efficiency ranges and is AMCA-certified for sound and air performance.

The resin used on the Series 37 is vinyl ester with antimony oxide added to achieve a Class I flame spread rate of below 25, per ASTM E84 tunnel test standards. Fan construction conforms to ASTM Standard D4167 for fiber-reinforced plastic fans and blowers, when specified.

Series 57:  The unit combines the Hartzell ring fan concept with a windband and butterfly dampers. Dampers open automatically when the fan goes on and close weathertight when the fan is shut down. During operation, the force of the discharge air effectively prevents entry of rain or snow. Standard sizes are 28 to 60″, with performance of 7,300 to 51,000 CFM at free air.

The unit’s inlet orifice increases efficiency by minimizing air friction. The windband is designed with the necessary height needed to prevent wind resistance against the operation of the ventilator.

Two semicircular damper lids at the base of the windband are mounted on stainless steel rods, which turn in nylon bearings. These fiberglass lids are very durable and have a longer lid life than steel. An additional dividend is the insulation qualities of the fiberglass, resulting in less heat loss when the unit is idle during winter months.

Series 58: The unit’s belt drive configuration and exterior motor mounting make it the logical choice where corrosive elements exist and protection from weather is essential. Standard sizes are 12 through 60″. A heavy-duty fiberglass panel provides a convenient method of curb mounting.

The fiberglass hood attaches to and is removable from the fan casing. Sizes through 32″ are one-piece construction; sizes 36 through 60″ are two-piece construction. Hinged construction is also available, providing access to the ventilator without complete removal of the hood.

The exterior-mounted motor is out of the airstream. The propeller shaft rotates in two heavy-duty bearings mounted on fiberglass supports taped to the inner shell with “T” reinforcements.

Belts, bearings, sheaves and the shaft are enclosed and protected from the airstream. The drive compartment is located on the negative pressure (suction) side of the propeller, drawing ambient air from outside the fan in and over the belts and bearings, ensuring a contaminant-free drive compartment.

Additional features:

  • Fiberglass (FRP) Construction — Standard fiberglass components are made of solid molded fiberglass consisting of corrosion resistant vinyl ester resin and glass fibers. All nuts, bolts and fasteners in contact with the airstream are stainless steel and encapsulated with fiberglass. Resin has a Class I flame spread rate of 25 or less. External fiberglass housing surfaces are protected with a minimum 10-mil UV resistant resin coating.
  • Temperature — Suitable for temperatures up to 200°F for belt drive units and 104°F for direct drive units.
  • Propellers — Solid one-piece molded fiberglass construction, electronically balanced on the unit at the operating speed to ensure vibration free operation. – Sizes 28” to 60” with adjustable blade options for sizes 54” & 60”
  • Motor — Belt drive units the motor is exterior mounted, out of the airstream. The propeller shaft rotates in two heavy-duty bearings mounted on fiberglass supports attached to the inner shell with “T” reinforcements. TEFC motors are standard. For Series 57 mill/ chem duty motors are standard.

SERIES 57 – DIRECT DRIVE:

  • Windband — Designed with the necessary height to effectively prevent wind resistance against the operation of the ventilator.
  • Dampers — Two fiberglass semi-circular lids at the base of the windband are mounted on stainless steel rods which turn in synthetic bearings.

SERIES 37 – BELT DRIVE:

  • Windband — Designed with the necessary height to effectively prevent wind resistance against the operation of the ventilator.
  • Stack Cap — Butterfly dampers open when the unit is on and close weathertight when unit is off. The discharge airstream prevents entry of rain or snow during operation.
  • AMCA Certified — Sound & Air Performance

SERIES 58 – BELT DRIVE:

  • Hood — Solid fiberglass construction. A stationary, removable hood is standard. Stationary and hinged hoods are one-piece construction up to size 32” and two-piece construction from sizes 36” to 60”. A special bifurcated version of this series is available that is direct drive and places the motor outside the airstream.

Specifications

Size: 12″ – 60″

Material Type: Fiberglass

Pressure Range:  0-1.5″ s.p. 1.5-3″ s.p.

Type: Roof Ventilator

ABS Certified: Yes

AMCA Certified: Yes

Market Applications

Chemical, Energy, Food Processing, Water and Wastewater