Seametrics SP Operating Manual
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S-Series
Low Flow Meter
Instructions
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SPT
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TABLE OF CONTENTS S-SERIES INSTRUCTIONS
General Information
General Information ...................................................................................................................................................Page 3
Features ..........................................................................................................................................................................Page 3
Specications ................................................................................................................................................................Page 4
Dimensions ....................................................................................................................................................................Page 4
Flow Range .....................................................................................................................................................................Page 4
Pressure Drop Curve ...................................................................................................................................................Page 5
Installation & Connections
Piping Requirements ..................................................................................................................................................Page 5
K-Factor ...........................................................................................................................................................................Page 5
Connections to Non-Seametrics Control Devices ..........................................................................................Page 5
Repair
Rotor Replacement .....................................................................................................................................................Page 6
Sensor Replacement ...................................................................................................................................................Page 6
SPX/SPT Parts List ........................................................................................................................................................Page 7
Troubleshooting
Problem ...........................................................................................................................................................................Back
Probably Causes ...........................................................................................................................................................Back
Things to Try ..................................................................................................................................................................Back
Seametrics • 253.872.0284 Page 2 seametrics.com
GENERAL INFORMATION
S-SERIES INSTRUCTIONS
These versatile impeller owmeters are availalble in 3/8”,
1/2”, 3/4”, and 1” nominal pipe sizes with female NPT
threads. They employ jewel bearings to allow for very low
minimum ow rates and superior life.
The SPX, with a body of polypropylene, is an economical
choice for metering water or low corrosion uids. The lens
cover is available in a choice of materials: acrylic for visual
ow indication of low-corrosion uids; polypropylene
when more corrosion resistance is needed. The standard
rotor assembly is Kynar® with tungsten carbide shaft. The
O-ring is EPDM.
Features
18’ Sensor Cable
Thread-in Sensor, Field Replaceable,
6–24 Vdc Pulse
Standard Acrylic Top with Clear
Removable Lens Assembly
(optional polypropylene top
without clear lens)
The SPT offers greater chemical resistance with a Teon®
body and cover, Teon®-coated Viton® O-ring, and standard
Kynar®/ceramic rotor assembly.
The pulse output of these meters is compatible with
many different types of controls, including a full range of
Seametrics rate displays and controls. The Seametrics FT430
and FT440 provide ow rate and total ow indication. The
FT440 also includes 4-20 mA output capability. The FT450 is
a battery-operated rate & total display. For metering pump
pacing or interfacing with low speed counters, the PD10
pulse divider is recommended. The AO55 may be used for
blind 4-20 mA transmission.
Hex Screws
Female NPT Ports
Polyproylene Body
Internal
• Jewel Bearings—Ruby Ring and Ball
• Kynar®/Tungsten Carbide Rotor Assembly (Kynar®/Ceramic or
Kynar®/Silicon Carbide optional)
• EPDM O-Ring (Viton® or Teon®-coated Viton® optional)
18’ Sensor Cable
Thread-in Sensor, Field Replaceable,
6–24 Vdc Pulse
Teon® Body and Top
Screws with Hex Nuts
Female NPT Ports
Internal
• Jewel Bearings—Ruby Ring and Ball
• Kynar®/Ceramic Rotor Assembly (Kynar®/Silicon Carbide
optional)
• Teon®-coated Viton® O-Ring (Viton® or EPDM optional)
SPX
SPT
Seametrics • 253.872.0284 Page 3 seametrics.com
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