© NOVATEC, Inc, 2018 All Rights Reserved 4 Document: SVP IM 7 FEB 2018
1 INTRODUCTION
NOVATEC SVP Series Vacuum Pump is designed to pneumatically convey plastic pellets or
powders in a vacuum conveying system. It does this by creating a vacuum to “pull” air
through the piping system. Plastic pellets or powders are introduced into the moving air
stream in various ways, including through the use of probes, pick-up tubes, and rotary air
locks. The SVP is used in conjunction with vacuum chamber station valves, etc. to form the
conveying system, which is controlled with either Master Control or Distributed Control
Panels. Several vacuum power units may be designed into the system as required. Vacuum
conveying systems typically distribute material from silos, surge bins, blenders, or drying
hoppers to processing machinery.
2 WARNING
Always disconnect power before servicing. Only qualified technicians should service,
maintain, or repair the SVP. Before using this equipment, read in detail the product bulletins
and other information found in this manual. A safe installation is necessary before operating
the equipment. The instructions should be understood and followed before installing or
operating the equipment.
3 OPERATING LIMITATIONS
Operating At Higher Altitudes…3000 Ft Above Sea Level or More
Atmospheric pressure is lower at higher elevations and as a result, the compression of air by
the pump requires more work for vacuum conveying. In these higher altitude applications the
pressure relief valve of SVP pumps must be adjusted on site to prevent the pump from
damaging itself or the motor by attempting to compress air of reduced density to an unsafe
level. Contact Novatec Engineering or Service at the number on the front cover of this
manual when operating the pump at 3000 ft or higher elevation.
Blower exhaust temperature and motor cooling are a function of both vacuum level and
elevation. Blower exhaust temperature must not exceed 300°F to avoid premature blower
failure.
Decreased motor FLA limits may require alternate overload protection or increased frame
size / hp.
3.1 Seek Time
Excessive starting and stopping of the pump will reduce blower and motor life and
void the warranty. Seek Time is a control parameter that allows your pump to
operate for short periods in vacuum break mode (no vacuum loading) while the
system control searches for new demands. Using the Seek Time feature, pump
starts must be limited to 1
Please check:
T regulator settings – page 7 Electrical Drawings pages 11-142 per hour to prevent
premature failure. The minimum Seek Time for a pump is 240 seconds to prevent
exceeding 12 starts per hour. Optimum Seek Time may be set dependent upon
pump capacity, utilization, number of stations, capacity of each vacuum chamber,
and individual station throughputs. (See your control panel instruction manual for
information on Seek Time)
