Roots DVJ & DPJ Blowers
Roots™ DVJ WHISPAIR™ dry vacuum exhausters & DPJ high-pressure blowers feature an advanced discharge-jet plenum design that introduces cool atmospheric air into the cylinder, enabling continuous operation at deep-vacuum levels. The DVJ & DPJ series includes multiple configurations for high vacuum and high-pressure applications.
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Product Specifications
The DVJ & DPJ vacuum blowers in this series are engineered for applications requiring deep vacuum levels and high-pressure performance. DVJ units incorporate an integral cooling design that allows operation beyond conventional vacuum limits, while DPJ units utilize WHISPAIR™ jet technology to control temperature and pressure.
Standard dry vacuum exhausters are typically limited to approximately 16" Hg due to high discharge temperatures. DVJ blowers overcome this limitation by introducing cooling air into the compression chamber, preventing overheating and enabling operation at significantly higher vacuum levels.
The units are constructed with integral-shaft ductile iron impellers, grey iron casings and headplates, and carburized alloy steel timing gears. Cylindrical roller bearings and splash lubrication systems ensure durability and long service life.
2504 DVJ WHISPAIR Vacuum Blower
Frame Size: 2504 DVJ
Flow: Up to 3650 ICFM (6205 mÂł/hr)
Vacuum: Up to 28 INHgV (950 mbar)
Features ball bearings, lip seals, splash lubrication at the gear end, and grease lubrication at the drive end
RAM DVJ Vacuum Blowers
Frame Sizes: 406 DVJ, 412 DVJ, 616 DVJ
Flow: Up to 2400 ICFM (4077 mÂł/hr)
Vacuum: Up to 27 INHgV (910 mbar)
721 DVJ WHISPAIR Vacuum Blower
Frame Size: 721 DVJ
Shares the same heavy-duty construction and performance features as RAM DVJ units
Not currently configured for gas applications
RAM 406 DPJ Dry High-Pressure Blower
Frame Size: 406 DPJ
Designed for continuous operation up to 30 PSIG in a single-stage unit
- Grey iron casing and headplates for structural durability
- Aluminum drive end and gear covers for weight optimization
- Integral cooling system for high vacuum operation
- Discharge jet plenum design for temperature control
- Configurable mounting and shaft arrangements
- Designed for both vacuum and pressure service applications
- Engineered for continuous-duty industrial operation
- Integral-shaft ductile iron impellers with involute profile
- Carburized and ground alloy steel spur timing gears (taper-mounted)
- Cylindrical roller bearings for high-load performance
- Ball bearing configuration on select models
- Splash lubrication systems for consistent operation
- Grease lubrication on drive end (select models)
- Piston ring seals to reduce internal leakage
- Lip-type oil seals to prevent lubricant contamination
- WHISPAIR™ jet technology for noise and temperature control
- Optional mechanical seals for gas handling applications
- Industrial vacuum systems
- Process vacuum operations
- Pneumatic conveying
- Chemical and petrochemical processing
- High-pressure air systems
- General air and gas handling applications
Engineered Solutions for High-Vacuum and High-Pressure Applications
ACFM offers specialized support for rotary positive displacement blowers designed for deep vacuum and high-pressure performance. The DVJ and DPJ series are built for applications where temperature control, efficiency, and durability are critical to system performance.
With advanced cooling designs and WHISPAIR™ technology, these units are ideal for operations that exceed conventional vacuum or pressure limits. Being an authorized positive pressure Roots blower supplier, our team helps you select the right configuration based on your process requirements. We ensure your blower delivers reliable performance across demanding industrial environments.