INTRODUCTION
This Maintenance and Repair Manual covers the Seco
Series vacuum pumps models SV 1010 C, SV 1016 C,
SV 1025 C and SV 1040 C (see Fig. 1). The Busch
Seco SV pump is an oil-free single-stage, rotary dry
vane vacuum pump.
General
All Seco SV single-stage, rotary vane pumps are direct-
driven, air-cooled, dry vane, positive displacement
pumps. They consist of a rotor mounted concentrically
on the drive shaft and positioned eccentrically in a cylin-
drical stator (see Fig. 2). The rotor has radially sliding
vanes that divide the pump chamber into sections. The
vane contact with the pump cylinder is maintained by
centrifugal force. The vanes are self-lubricating and
operate oil-free.
Power Requirements
ALL ELECTRICAL CONNECTIONS SHOULD BE
MADE BY A QUALIFIED, COMPETENT ELECTRICIAN
IN ACCORDANCE WITH ALL LOCAL AND NATIONAL
CODES!
For a copy of commonly used three phase and single
phase motor connections, see Fig. 3, 4 and 5.
2
Fig. 1 - Seco 1025 C Pump
1
2
3
1 - Gas Inlet
2 - Gas outlet (optional)
3 - Standard gas outlet w/discharge silencer valve
4 - Vacuum relief valve
4
CAUTION: Do not allow any oil, grease, liq-
uid or vapor to enter the pump.
Fig. 5 - AEG Motor 115V, 1 Phase
Fig. 4 - AEG Motor 460V, 3 Phase
Fig. 3 - AEFG Motor 230V, 3 Phase
Fig. 2 - Pumping Cycles
Exhaust
Area
Intake
Area
Compression
Area
Rotation
