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Conveying System Mechanical Components Chapter 2: Functional Description 25 of 138
Blowback Pumps
SPDB Series Models: SPDB 25, SPDB 30
• Compressed air-operated blowback and vacuum valves with high-
vacuum relief.
• Mechanical high-vacuum relief valve.
• Support base.
• Positive displacement blower.
• Three (3) -phase high efficiency TEFC electric motor.
• 25 or 30 horsepower (18.75 or 22.5 kW)
• Standard 230-460/3/60. 380-415/3/50. 575/3/60 is optional.
• Adjustable motor base.
• Vacuum gauge.
• Vacuum switch for high vacuum protection.
• Junction box with motor starter, including overload protection.
• Discharge silencer.
Options
• Fused disconnect in the junction box.
• Distributed I/O capability.
• Sound enclosure.
• Efficiency motors available.
• Re-sheave for elevation.
• 24VDC or 120VAC controls.