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Series TVF Total View Industrial Flowmeters

Specifications - Installation and Operating Instructions

Bulletin F-22

The Series TVF Total View Industrial Flowmeters are

economically priced, tough, simple and accurate meters for

water, oils, coolants, compressed gases and other industrial

applications. The flowmeters have a full-scale accuracy of ±2%

and can be disassembled quickly without the meter being

removed from the pipeline for easy cleaning. The TVFS is

constructed of T-316 stainless steel and features polysulphone

sight tubes. The Series Total View Industrial Flowmeters are

available with standard 3/4˝ and 1-1/2˝ female NPT connections.

The easy to read flowmeters provide 360° rotation of scale on

plastic sight tube models.

SAFETY PRECAUTIONS

Personnel safety should be considered before pressurizing and

operating the system. There are numerous possibilities for error

in system operation and maintenance as well as component

installation. Because human eyes must necessarily come into

close proximity with the flowmeter to read it, it is recommended

that safety shielding be used with the meter along with safety

glasses. The panel mount kit (available for most standard

models) also provides shielding. Another protective measure is

to use a sheet of transparent, high-impact material in a broad

area in front of the meter. If hazardous, toxic, or flammable fluids

are being metered, recommended safeguards should include

methods to protect personnel from splash or rebound. A method

of quick, safe removal of dangerous fluids should also be

included.

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com

SPECIFICATIONS

Service: Compatible gases or liquids.

Wetted Materials: Body: T-316 SS; O-rings: Buna-N; Sight

Tube: Polysulfone.

Temperature Limits: See “Operating Limits” Table.

Pressure Limits: See “Operating Limits” Table.

Accuracy: ±2% FS.

Repeatability: ±1/4% of indicated flow rate.

Process Connections: 3/4˝ and 1-1/2˝ female NPT.

Scale Length: 3.2˝ (8 cm) for 3/4˝ NPT connection, 5.2˝ (13 cm)

for 1-1/2˝ NPT connection.

Weight: 4 lbs (1.8 kg) for 3/4˝, and 12 lbs (5.5 kg) for 1-1/2˝.

RECOMMENDED PIPING: Series TVF Flowmeters generally

have no special straight run or other piping requirements. Inlet

piping should be the same size as the meter connection. Some

effect on meter accuracy may occur at high flow velocities if inlet

piping guidelines are violated. Please refer to the table on the

next page. When installing on different size pipe, use standard

pipe adapters and come into the meter inlet with a nipple 8

diameters long of the same size for greatest accuracy. Control

valves should be mounted on the outlet side of the meter. The

use of a three valve manifold around the meter is suggested (per

Figures 2 & 3) as it allows uninterrupted process flow while the

meter is being cleaned.

TVFS

EMOVAL

LEARANCE

ONNECTIONS

.36

5.22

.81

.53

.68

.71

4.00

5.70

1.35

2.48

2.72

3.95

3.00

5.00

emale NPT

3/4˝

1-1/2˝

Material

T. STL.

1 2 3 4 5 6 7 8

DWYER INSTRUMENTS, INC 1

Inhaltsverzeichnis

Seite 1 - DWYER INSTRUMENTS, INC

Series TVF Total View Industrial FlowmetersSpecifications - Installation and Operating InstructionsBulletin F-22 The Series TVF Total View In

Seite 2

MAXIMUM FLOWS (WITHOUT EFFECTING ACCURACY) FOR UNDERSIZED PIPES CONNECTED DIRECTLY TO MEM FLOWMETER INLETSPIPE NPS1/43/81/23/411-1/41-1/222-1/2346DATA

Seite 3

CORRECTING READINGS FOR NEW GAS CONDITIONSQg= QsWhere:Qg= SCFM, corrected to new conditions.Qs= SCFM read on meter scale.Pg= Operating pressure, psia

Seite 4

EXAMPLE: If using a standard meter scale for SCFM Dry Air @100 psig, 70°F on argon (SP. GR. = 1.378) at 50 psig, 100°F,what would the conv

Seite 5

ASSEMBLYReplace all parts in reverse order of disassembly. Note the smallkey on the core tube that must be aligned with a correspondingkeyway in the

Seite 6

SYMPTOMFLOAT HANG-UPFLOAT BOUNCEAPPARENT FALSEREADINGS, GASMETERSAPPARENT FALSEREADINGS, LIQUIDMETERSUSUAL CAUSECaused by particles, sludge, etc. (inc

Seite 7

APPARENT METERREADINGMIGRATION (readingchanges but flowappears constant)LEAKAGEFrequently caused by use of soft disc type valves,which may n

Seite 8

DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.comP.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwye

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