Install Instructions

Series HFPC & HFPS Plastic Flow Meters
Specications - Installation and Operating Instructions
Bulletin F-71
The HFPC & HFPS SERIES Flowmeters are made of injection molded, polycarbonate
and polysulfone bodies. Series HFPC and HFPS owmeters have dual scales
measuring in both GPM and LPM with ±5% full scale accuracy. Models are available
with 1/2˝, 3/4˝ or 1˝ male or female NPT connections. Female 1/2˝, 3/4˝ and 1˝ BSPP
connections are also available. Rugged construction allows these meters to handle
maximum pressures of 325 psig and 200 F. Units can be mounted in any position, even
applications with downward ow.
CAUTION: Series HFPC & HFPS Flowmeters are for indoor use only or areas
without direct sunlight. Polycarbonate & polysulfone are adversely affected by
ultraviolet light.
INSTALLATION
The casing and union retainers are made of either Polycarbonate or Polysulfone
materials permitting use with a variety of media. Use of mild detergent to clean the
meter body is encouraged to prevent damaging the label or associated components.
The meters are mounted in-line and are direct reading. The meters can be mounted
in a vertical or horizontal position as long as the uid is owing in the direction of
the arrow on the ow scale. No straight pipe is required before or after the meter. In
fact, 90° elbows can be installed on both ends without any noticeable ow variation.
When installing a meter, apply “Plumbers Tape” or “Liquid Plumber’s Sealant” on pipe
threads. If tape is used, be sure to leave 1/8˝ (3 mm) of pipe thread exposed on end
of pipe. Position lter in front of meter and in a location that allows easy access for
routine maintenance.
The meter should not be mounted in a manner such that piping misalignment or other
system components can exert force or produce a bending moment on the pressure
vessel.
To retain accuracy and repeatability internal moving parts are closely toleranced and
require ltration of at least 74 micron or a 200 mesh screen.
When installing meters onto threaded pipe caution should be taken not to over tighten
the pipe connections or introduce torque on the main body of the meter. The meter
main body may rupture if over-tightened.
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials: HFPC: Polycarbonate body, Buna-N seals, Stainless Steel
spring, Polysulfone connections. HFPS: Polysulfone body, Buna-N seals, Stainless
Steel spring, Polysulfone connections.
Maximum Pressure: 325 psig (22.4 bar).
Maximum Temperature: HFPC: 200° F (93° C) HFPS: 250° F (121° C).
Accuracy: ±2% FS.
Repeatability: ±1% FS.
Pressure Loss: See chart.
Weight: Standard models 1 lb (453.6 g). Models with optional brass connections 2
lb (907 g).
ø2-7/16
[61.91]
“L”
Meter Size Dim “L”
1/2 male
1/2 female
3/4 male
3/4 female
1 male
1 female
7-11/16 [195.26]
7-5/32 [181.76]
8-1/32 [204.00]
7-9/16 [192.09]
8-3/32 [205.58]
7-9/16 [192.09]
®
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [e-mail]