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Mounting Orientation
The meter can be installed to operate in any position.
Models with 1 in. Male Plastic NPT Threads
Pipe Support
Plastic Coupling
Plastic Coupling
Union
Metal Pipe
Figure 4: 1 in. (25 mm) NPT models installation
1. Apply a single layer of Teflon® tape to the male NPT threads of the flow meter.
2. Thread the flow meter inlet into a 1 in. plastic, female pipe coupling.
3. Thread the flow meter and coupling onto the inlet pipe and hand tighten.
Make sure the flow direction arrow on the flow meter corresponds with the
system flow direction. See
Figure 3
.
4. Place an open-end wrench on the flow meter body hex and place a pipe
wrench on the metal mating pipe. Tighten until snug. Do not overtighten.
Make sure the flow meter scale is oriented for convenient viewing. Do not
back-off or unscrew fittings to rotate scale for better viewing.
5. Thread a 1 in. plastic pipe coupling to the outlet connection of the flow meter.
Stack a pipe nipple and half of a pipe union onto the pipe coupling. Tighten
the assembly as required.
6. Install the other half of the pipe union to the outlet pipe and connect the
union halves together.
7. Piping should be supported and aligned properly to avoid placing stress on
the flow meter body.
8. Slide the limit indicators to point to appropriate positions on the flow meter
scale. To remove the limit indicators, slide them fully towards the flow meter
outlet.
Models with 1/2 in. Female, Metal NPT End Fittings
Union
Pipe Support
Metal Pipe
Figure 5: Female, metal threaded end fittings installation
1. Apply Teflon® tape to the male pipe thread connections.
2. Thread the inlet of the flow meter onto the appropriate pipe connection. Make
sure the flow direction arrow on the flow meter corresponds with the system
flow direction. See Figure 3.
3. Tighten flow meter connection by placing an open-end wrench on the flow
meter metal connection adjacent to the pipe that is being attached. Tighten
until snug. Make sure flow meter scale is oriented for convenient viewing. Do
not overtighten. Do not back off or unscrew to rotate scale for better viewing.
4. Install a union fitting at the outlet end of the flow meter.
DO NOT TIGHTEN THE FLOW METER BY WRENCHING FROM THE
OPPOSITE FITTING, ASTHE METER BODY COULD CRACK.
5. Piping should be supported and aligned properly to avoid placing stress on
the flow meter body.
6. Slide the limit indicators to point to appropriate positions on the flow meter
scale. To remove the limit indicators, slide them fully towards the flow meter
outlet.
Models with 3/4 in. Male, Metal NPT Threaded End
Fittings
Pipe Support
Figure 6: Male, metal NPT threaded end fittings installation
1. Remove both fittings from the flow meter inlet and outlet. Remove the O-rings
from the fittings.
2. Apply Teflon® tape to the male pipe thread connections.
3. Place the brass or stainless steel hex coupler onto the pipe with the threads
facing the flow meter.
4. Thread the flow meter fittings onto the mating pipe.
5. Tighten fittings by placing an open-end wrench onto the fitting and a pipe
wrench onto the mating pipe.
6. Repeat steps 3…5 for the other flow meter fitting.
7. Lubricate the two O-rings that were removed in step 1. Place the O-rings onto
the threaded fittings.
8. Place flow meter between the two installed fittings. Make sure the flow
direction arrow on the flow meter corresponds with the system flow direction.
See Figure 3. Thread the two hex couplers onto the flow meter body.
9. Rotate the flow meter body so the scale can be conveniently viewed. Tighten
hex couplers. Typically, only hand tightening is required.
10. Piping should be supported and aligned properly to avoid placing stress on
the flow meter body.
11. Slide the limit indicators to point to appropriate positions on the flow meter
scale. To remove the limit indicators, slide them fully toward the flow meter
outlet.
MAINTENANCE
ProSense FG1 series flow meters are designed to provide many years
of service with little or no maintenance requirements. The inside and
outside of the meter can be cleaned with denatured alcohol or mild
detergent and warm water.
FLUID CORRECTION STANDARD FLOW SCALES
Standard liquid flow scales are calibrated in GPM (Gallons per Minute)
and LPM (Liters per Minute) at 0.876 specific gravity for petroleum-based
fluids, and 1.0 specific gravity for water and water-based fluids.
For field conversion of the standard scale to other fluids, see “Density
Effect”.
DENSITY EFFECT
Any fluid density change from stated standards has a proportional effect
on meter accuracy. Corrections for more or less dense fluids can be made
to standard scales using the following correction factor:
√
1.0
√
0.876
Figure 7: Correction for water-based meters
Figure 8: Correction for petroleum-based meters
PRESSURE DROP
The pressure drop curve is valid for fluids with density and viscosity
similar to factory test fluids. Fluids with higher viscosity than these test
fluids yield a higher pressure drop through the flow meter and piping
system per a given flow volume.
A system must have adequate fluidic horsepower available to move the
system fluid at a prescribed rate at a pressure adequate to overcome all
pressure reducing devices, including the flow meter.
½", ¾", 1" OIL & WATER METERS
FLOW (GPM)
0
3
6
9
12
15
18
21
24
27
30
PRESSURE DRO
P
(PSID)
0
2.00
4.00
6.00
8.00
10.00
16 GPM
18 GPM
4 GPM
10 GP
M
28 GP
M
7 GP
M
SPECIFICATIONS
FG1 Series Specifications
Accuracy
±5% of full scale
Repeatability
±1%
Pressure Rating
325 psi (22.4 bar) Maximum
Temperature
Range
32…250° F (0…121° C)
Fittings/Threads
NPT ANSI/ASME B1.20.3
Materials
Wetted
Body
Polysulfone
Piston
Polysulfone
Cone
Polysulfone
Spring
T300 Stainless Steel
Retaining Rings
PH15-7MO Stainless Steel
Seals
Buna-N
Indicator Ring
Buna-N
Fittings (1/2 and
3/4 NPT models)
C360 Brass
Non-wetted
Limit Indicator
Polypropylene
Scale
Polyester
Calibration Fluid
Oil
0.876 specific gravity, 32 cSt viscosity
Water
1.0 specific gravity, 1.0 cSt viscosity
