Hedland EZ-View Operating Manual

Installation Instructions For

EZ-View® Flow Meter and

EZ-View

®

Flow-Alert™ Flow Meter

8635 Washington Avenue • Racine • Wisconsin 53406-3738 USA

FORM # HLIT 300

I. INTRODUCTION

The EZ-View series ow meter is a rugged, low-cost
direct reading industrial class ow meter that is simple to
install. It can be mounted (installed) in any position from
vertical to horizontal without costly ow straighteners
or other special plumbing. Constructed of high impact
polysulfone plastic, the EZ-View product line offers
excellent structural integrity and chemical compatibility
with a wide range of industrial chemicals.

EZ-View ow meters provide instantaneous, direct­reading ow rate measurement of liquids in closed
piping systems. The transparent polysulfone plastic
body allows visual inspection of the uid condition as
well as viewing of the internal ow indicator relative to a
calibrated ow scale. See Figure 1.

EZ-View meters do not require electrical connections
for operation, and provide measurement by creating a
predictable differential pressure across a sharp-edged
orice that is located in the piston assembly.

II. OPERATING PRINCIPLE

The EZ-View series ow meter is a piston-type variable
area ow meter that uses a sharp-edged annular orice,
formed between an open-centered piston and a tapered
metering cone. The piston is held in a “no-ow” position
at the base of the cone by a precision retention spring.
As ow in the pipe increases, the differential pressure
correspondingly increases across the piston orice, and
moves the piston/ow indicator against the spring. The
greater the ow rate, the further the piston moves along
the tapered metering cone. The ow rate is measured
by viewing the red indicator ring, mounted on the
piston, relative to a graduated ow scale located on the
transparent ow meter body. See Figure 2.

DIVISION OF RACINE FEDERATED INC.

TEL 800-HEDLAND • FAX 800-CHK-FLOW

End Fitting

Body

Spring

Limit Indicator

Flow Scale

Magnet

(Switching Models Only)

Metering Cone

Serrated Rail

Piston Assembly

Flow Indicator

Pressure Seal

Figure 1. EZ-View Flow Meter

The unique design allows the EZ-View meter to be
mounted in any orientation–horizontal, vertical, upside
down, etc.–without sacricing measurement performance.
Flow straighteners, located in the inlet and outlet, allow
the ow meter to be less sensitive to turbulent ow
conditions. Liquid measurements are provided in GPM
(Gallons per Minute) and LPM (Liters per Minute).

80

60

GPM

16

12

40

8

20

4

LPM

Flow Rate
Indicator

Figure 2. Flow Rate Indicator

Page 1

EZ-View Flow Meter and EZ-View Flow-Alert Flow Meter

Installation & Maintenance Instructions

III. SPECIFICATIONS

Accuracy

• ±5% of full scale

Repeatability

• ±1%

Pressure Rating

• 325 PSI (22.4 bar) Maximum

• Meters with Type 1 PVC fitting subject to normal PVC
system ratings

Temperature Range

• +32 °F to +250 °F (0 °C to +121 °C)

• +32 °F to +140 °F (0 °C to + 60 °C) for meters with
Type 1 PVC fittings

Pressure Drop

See Pressure Drop Charts on page 14

Fittings/Threads

• NPT ANSI/ASME B1.20.1

• BSPT ISOR7

• BSPP ISO228

Dimensions

1.78

(45.2)

1.37

(34.8)

BODY FLATS

LENGTH

LPM

2040608090

CAUTION

!

1. Only use Teflon tape to seal threaded fittings.
DO NOT use pipe dope.

2. DO NOT sweat fit adaptor fittings into a system
while mounted to the EZ-VIEW meter.

W

®

Materials (wetted)

• Body
½", ¾" & 1" sizes Polysulfone or Radel
1-½" & 2" sizes Radel

• Piston Polysulfone

• Cone
½", ¾" & 1" sizes Polysulfone or Radel
1-½" & 2" sizes Polysulfone

• Spring T300 Stainless Steel

• Retaining Rings PH15-7MO Stainless Steel

• Seals Buna-N

• Indicator Ring Buna-N

• Magnet Strontium Ferrite

(switching units only)

• Fittings C360 Brass, PVC or T303 Stainless Steel

Materials (non-wetted)

• Limit Indicator Polypropylene

• Scale Polyester

Material Compatibility

• See Fluid Selection Chart on page 13

Calibration Fluid

• Oil 0.876 specific gravity, 32 cSt viscosity

• Water 1.0 specific gravity, 1.0 cSt viscosity

3.25 (82.5)

BODY FLATS

LENGTH

®

®

®

½", ¾" & 1" Sizes 1-½" & 2" Sizes

Size & Type Material Connection Length

in (mm)

½" NPTF &

BSPT

¾" NPTF &

BSPT

¾" &

1" Sweat
1" NPTF Polysulfone Male 5.25

1" Nominal PVC Socket Weld 8.46

1" NPTF PVC Male 8.86

Page 2

Brass & SS Female 7.75

Brass Male 8.25

Brass
Brass

Male

Sweat

(196.8)

(209.5)

7.75

(196.8)

(133.3)

(214.9)

(225.0)

Fitting

Flats

in (mm)

1.50

(38.1)

1.50

(38.1)

1.50

(38.1)

N/A 2" Socket

1.54

(39.1)

1.50

(38.1)

Size & Type Material Connection Length

1-½" NPTF &

BSPP

1-½" Socket

Weld

2" NPTF &

BSPP

Weld

Fitting

in (mm)

Brass Female 8.72

(221.5)

PVC Socket Weld 12.72

(323.1)

Brass Female 8.72

(221.5)

PVC Socket Weld 11.48

(291.6)

-- -- -- -- --

-- -- -- -- --

Flats

in (mm)

3.00

(76.2)

3.00

(76.2)

N/A

N/A

EZ-View Flow Meter and EZ-View Flow-Alert Flow Meter

Installation & Maintenance Instructions

IV. INSTALLATION

CAUTION

This unit should be installed and serviced by technically
qualied personnel trained in maintaining industrial
class ow instrumentation and processing equipment.

CAUTION

Read instructions thoroughly before installing the
unit. If you have any questions regarding product
installation or maintenance, call your local supplier for
more information.

Installation Recommendations

The ow meter is a simple device to install. However,
the following measures are recommended for reliable,
trouble-free operation:

CAUTION

Liquid pipe sealants, PVC/CPVC primers and PVC/
CPVC cements contain solvents that are not compatible
with polysulfone plastic. Allowing liquid pipe sealants
to contact the plastic ow meter will result in weakening
of the ow meter body and potentially cause fracturing
under pressure.

Don’t - Allow liquid pipe sealant, PVC/CPVC primer
or PVC/CPVC cements to come into contact with the
plastic ow meter. These contain solvents that are not
compatible with polysulfone plastic and will result in the
ow meter body weakening and potentially fracturing
under pressure. If a pipe sealant is required, use of
Teon® tape is recommended.

Don’t - Install the ow meter in piping systems that are
not aligned or properly supported.

Don’t - Connect the ow meter male plastic NPT ttings to
female metal NPT couplings. Differences in coefcients
of expansion between metals and plastics can cause
the plastic ow meter body to crack. Utilize a female-to­female plastic pipe coupling to connect metal pipe to the
plastic ow meter.

Don’t - Use pipe wrenches on the ow meter body.
To avoid scarring or otherwise damaging the external
surface, use an open-end wrench on the integral hex
ats during installation.

Don’t - Subject the ow meter to back pressure or back
ow. The ow meter will operate as a “leaky” check valve
when subjected to reverse ow, but can be damaged if
the reverse hydraulic horsepower is too great.

Don’t - Install the ow meter on systems with large
degrees of particulate contamination. Minimum ltration
of 200 mesh (74 micron) is recommended for trouble­free operation.

Don’t - Install O-ring seals that have not been lubricated.

Piping (Plumbing)

CAUTION

To avoid unnecessary pipe exing that could cause
structural stress on the ow meter body, independent
support located as near as possible to the inlet and
outlet of the meter should be used to isolate the meter
from the piping system. Failure to provide this support
could reduce the life of the meter.

Piping should be properly aligned with the meter inlet and
outlet to minimize structural stress on the plastic meter
body. Special attention should be given to this effort if
higher operational pressures and/or temperatures are
anticipated. Piping should be rmly supported by external
mounting brackets, both upstream and downstream from
the meter to avoid any pipe exing that could reduce the
life of the meter.

1. If the ow meter inlet or outlet are to be rigidly

mounted, and the opposing port is to be connected to
a exible hose, the end connected to the exible hose
MUST be rigidly mounted.

2. This unique design does not require special plumbing

or accessories to stabilize turbulent ow. Flow meters
can be installed immediately adjacent to 90° elbows
or other components, providing system design
exibility.

3. A 200 mesh (74 micron) or better ltration is required

to assure reliable performance.

Page 3

EZ-View Flow Meter and EZ-View Flow-Alert Flow Meter

Installation & Maintenance Instructions

Flow Direction

These meters only accept ow in one direction. Make
sure to align the Flow Arrow, located on the bottom
of the meter’s ow scale, in the same direction as the
anticipated line ow. See Figure 3.

Mounting Orientation

The meter can be installed to operate in any position.

H621-XXX 1" NPT Models (See Figure 4)

1. Apply a single layer of Teon® tape to the male NPT
threads of the ow meter.

2. Thread the ow meter inlet into a 1" NPT plastic,
female pipe coupling.

3. Thread the ow meter and coupling onto the inlet
pipe and hand tighten. Make sure the ow direction
arrow on the ow meter corresponds with the system
ow direction. See Figure 3.

4. Place an open-end wrench on the ow meter body
hex and place a pipe wrench on the metal mating
pipe. Tighten until snug. DO NOT overtighten. Make
sure the ow meter scale is oriented for convenient
viewing. DO NOT back off/unscrew ttings to rotate
scale for better viewing.

Flow Direction

Indicator

9080604020

242016

LPM

WATER

8

4

12

GPM

Figure 3. Flow Direction Indicator

5. Thread a 1" NPT plastic pipe coupling to the outlet
connection of the ow 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 ow meter body.

8. Slide the limit indicators to point to appropriate positions
on the ow meter scale. To remove the limit indicators,
slide them fully towards the ow meter outlet.

Page 4

Figure 4. Model H621-XXX 1" NPT Models Installation

EZ-View Flow Meter and EZ-View Flow-Alert Flow Meter

1" Union

Installation & Maintenance Instructions

H628-XXX 1", H636-XXX 1-½" and H619-XXX 2" PVC with Socket Weld Models (See Figure 5)

1. Remove the two end ttings from the ow meter.
Lubricate the O-rings and install the ttings onto the
ow meter.

CAUTION

into their mating components and twisting 1/8 turn to
guarantee adhesion. Allow sufcient drying time.

4. Using the method outlined in steps 2 & 3, apply half of
the PVC union to the ow meter outlet tting.

5. Install the other half of the PVC pipe union to the outlet

Liquid pipe sealants, PVC/CPVC primers and PVC/
CPVC cements contain solvents that are not compatible
with polysulfone plastic. Allowing liquid pipe sealants
to contact the plastic ow meter will result in weakening
of the ow meter body and potentially cause fracturing
under pressure.

2. Prepare the ow meter PVC ttings and PVC pipe
couplings with PVC cleaner/solvent.

3. Apply a thin layer of PVC glue to the PVC ow meter
ttings. Orient the meter during curing to ensure that
excessive glue will not run into or onto the ow meter.
Connect all PVC glue joints by inserting the pipes fully

1"

pipe.

6. Make sure the ow direction arrow on the ow meter
corresponds with the system ow direction. See
Figure 3 on page 4. Lubricate the union O-ring and
connect the union together.

7. Piping should be supported and aligned properly to
avoid placing stress on the ow meter body.

8. Slide the limit indicators to point to appropriate
positions on the ow meter scale. To remove the limit
indicators, slide them fully towards the ow meter
outlet.

NOTE: To replace meter body order P.N. H622-XXX.

Figure 5. Model H628-XXX 1", H636-XXX 1-½" & H619-XXX 2" PVC Socket Weld Models Installation

H620-XXX Brass Sweat Fitting Models (See Figure 6 on page 6)

1. Remove both brass ttings from the ow meter inlet
and outlet. Remove O-rings from the ttings.

2. Apply solder ux to the ow meter brass ttings and
mating pipe surfaces.

3. Place the brass hex coupler onto the pipe with the
thread facing the ow meter. Slide the brass sweat
tting onto the prepared pipe.

4. Sweat the ttings onto the pipe. DO NOT apply heat
to the brass ow meter tting with the plastic ow
meter body or seals attached to the tting.

5. Repeat steps 3 & 4 for the other ow meter tting.
Allow ttings to cool.

6. Lubricate the two O-rings removed in step 1. Place
the O-rings onto the brass ttings.

7. Place the ow meter in between the two installed
brass ttings. Make sure the ow direction arrow
on the ow meter corresponds with the system ow
direction. See Figure 3 on page 4. Thread the two
brass hex couplers into the ow meter body.

8. Rotate the ow meter body so the scale can be
conveniently viewed. Tighten the hex couplers.
Typically, only hand tightening is required.

9. Piping should be supported and aligned properly to
avoid placing stress on the ow meter body.

10. Slide the limit indicators to point to appropriate
positions on the ow meter scale. To remove the limit
indicators, slide them fully towards the ow meter
outlet.

NOTE: To replace meter body order P.N. H622-XXX.

Page 5