Howden Blowers
- Valveco is committed to providing quality products. We are proud to represent the Howden Roots line of blowers and compressors. We stock a large supply of Howden Positive Displacement Blowers and can customize a Howden (PD) Blower package to meet your needs.
- Howden Roots manufactures a full line of rotary-lobe and centrifugal air and gas handling blowers as well as vacuum pumps. In 1854, Roots pioneered the rotary-lobe blower design and has extensive experience with a wide range of applications and industries.
- A rotary positive blower, sometimes called a Positive Displacement, or PD blower, is a machine that “pushes” a relatively constant volume of the gas handled at the inlet through the discharge. It doesn’t internally compress the gas, so it isn’t considered a compressor. The amount of gas the machine handles is fixed by the configuration of the casing and rotating parts.”
- Flow through a PD machine is relatively constant, regardless of pressure changes. This is different from a centrifugal compressor, which maintains a relatively constant pressure while the flow varies.

KEY FEATURES
- Easy to install, with small footprint.
- Acoustic enclosure is designed to provide up to 22 dBA free field attenuation.
- Broad operating performance range provides a multitude of efficient and compact solutions.
- Air flow from front to rear is designed for personnel safety and equipment reliability.
- Access to air filter is convenient and designed to reduce pressure losses, improving reliability and blower efficiency and protecting your investment.
BENEFITS
- Small rotary performance
- Flow rate: Up to 10,710 m3/hr (6,300 cfm)
- Pressure: Up to 15 psig
- Vacuum: Up to 28” Hg
- Large rotary performance
- Flow rate: Up to 120,000 m3/hr (70,000 cfm)
- Pressure: Up to 35 psig
- Vacuum: Up to 28” Hg and high vacuum
- Custom design available for high static pressures
APPLICATIONS
Huge range of applications as the small lobe blowers are designed to work on trucks, while the bigger blowers operate in applications such as vacuum filtration and drying and materials handling.

ROOTS™ UNIVERSAL RAI ® ROTARY POSITIVE BLOWERS

RAM SERIES

RCS SERIES

RAS-J/RGS-J FORTY PSL BLOWER

ROTARY POSITIVE BLOWERS EASY AIR ROTARY

RAM-GJ GAS WHISPAIR BLOWER
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