Dwyer RM Bedienungsanleitung PDF herunterladen

ulletin F-43

DWYER INSTRUMENTS, INC.

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

P.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

Specifications - Installation and Operating Instructions

Series RM Rate-Master

Flowmeters

J

ACK WIDTH

I

FULL OPEN

The Series RM Rate-Master

Flowmeters are furnished in three models (see Fig.

2), each available in a broad array of flow ranges with direct reading scales for air,

gas or water. Installation, operation and maintenance are very simple. Only a few

common-sense precautions must be observed to assure long, trouble-free service.

CAUTION: Rate-Master

Flowmeters are designed to provide satisfactory long-

term service when used with air, water or other compatible media. Refer to facto-

ry for information on questionable gases or liquids. Avoid solutions of acids, bases

or salts having a pH below 5.0 or above 8.5. Caustic solutions, antifreeze (ethyl-

ene glycol) and aromatic solvents should definitely not be used.

Calibration

Each Rate-Master

Flowmeter is calibrated at the factory. If at any time during the

meter’s life, you wish to re-check its calibration, do so only with devices of certified

accuracy. DO NOT attempt to check a Rate-Master

Flowmeter with a similar

flowmeter, as seemingly unimportant variations in piping and back pressure may

cause noticeable differences in the indicated reading. If in doubt, return your Rate-

Master

Flowmeter to the factory. Before proceeding with installation, check to be

sure you have the Rate-Master

flowmeter model and flow range you require.

LOCATION: Temperature, Pressure, Atmosphere and Vibration: Rate-Master

Flowmeters are exceptionally tough and strong. They are designed for use at pres-

sures up to 100 psi (6.89 bar) and temperatures up to 130°F (54°C).

DO NOT EXCEED THESE LIMITS! The installation should not be exposed to

strong chlorine atmospheres or solvents such as benzene, acetone, carbon tetra-

chloride, etc. The mounting panel should be free of excessive vibration, as it may

prevent the unit from operating properly.

(OPEN)

Model RMA

4 -9/16 (11.59)

3 (7.62)

/8 NPT CONN.

-5/8 (4.13)

0 - 32 Thds.

/8 (.95)

1-1/16 (2.70)

1-3/16 (3.02)

11/16 (1.75)

1/64 (2.42)

-3/8 (3.49)

3/4 (1.91)

4-13/16 (12.22)

1 (2.54)

odel RMB

-1/2 (21.59)

-7/16 (16.35)

1/4 NPT CONN.

3-15/16 (10.00)

1/4 - 20 Thds.

/8 (1.59)

-7/8 (4.76)

-3/4 (4.45)

1 (2.54)

1-7/16 (3.65)

1-13/16 (4.60)

-1/4 (3.18)

-3/4 (22.23)

-1/2 (3.81)

imensions in Inches (Centimeters)

Model RMC

15 -1/8 (38.42)

2 -1/4 (31.12)

/2 NPT CONN.

-3/4 (22.23)

0 - 32 Thds.

1 (2.54)

2-3/4 (6.99)

2-1/2 (6.35)

-7/16 (3.65)

-31/32 (5.00)

-1/2 (6.35)

2 (5.08)

15-3/8 (39.05)

2-1/4 (5.72)

Inlet Piping Run: It is good practice to approach the flowmeter inlet with as few

elbows and restrictions as possible. In every case, the inlet piping should be at

least as large as the connection to the flowmeter; i.e.,1/8˝ Iron Pipe Size for RMA

models 1/4˝ IPS for RMB models,1/2˝ IPS for RMC models. Length of inlet piping

makes little difference for normal pressure-fed flowmeters.

For flowmeters on vacuum air service, the inlet piping should be as short and open

as possible. This will allow operation near atmospheric pressure and thereby

insure the accuracy of the device. (Note: for vacuum air service, the flow control

valve, if any, should be on the discharge side of the flowmeter. Either the TMV unit

or a separate in-line valve may be applied.).

Discharge Piping: As on the inlet, discharge piping should be at least as large as

the flowmeter connection. Also, for pressure-fed flowmeters on air or gas service,

the discharge piping should be as short and open as possible. This will allow oper-

ation of the flow tube at near atmospheric pressure and insure the accuracy of the

device. This is of less importance on water or liquid flowmeters, as the flowing

medium is generally incompressible and moderate back pressure will not affect the

accuracy of the instrument as calibrated.

POSITIONING AND MOUNTING

All Rate-Master

Flowmeters must be mounted in a vertical position with inlet con-

nection at the bottom rear and outlet at the top rear.

Bezel or Through-Panel Mounting: Make panel cutout using appropriate dimen-

sions from Fig. 2. Flowmeter must fit into panel freely without forcing or squeezing.

Insert the flowmeter from the front of the panel and install the mounting clamps

from the rear. Insert and tighten the clamp bolts in the locations shown in Fig. 3.

Do not exceed 5 in./lbs. Make connections to inlet and outlet ports using pipe

thread sealant tape to avoid leakage. Avoid excess torque, which may damage the

flowmeter body.

Panel Cutout For Flush Mounting

-5/8 (11.75)

/8 (2.22)

7/16 (1.11)

1/4 (0.64)

8-9/16 (21.75)

1-5/16 (3.33)

5/8 (1.59)

9/32 (0.71)

15 -3/16 (38.58)

-1/16 (5.24)

5/16 (2.38)

13/32 (1.03)

igh

Wide

Pipe

Bolt

Fig. 1

Fig. 2

anel Hole Sizes for Surface Mounting

RMC RMB-SSV RMA-TMV

1 2

DWYER INSTRUMENTS, INC 1

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Seite 1 - DWYER INSTRUMENTS, INC

Bulletin F-43DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.comP.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A. Fax: 219/872-9057 e-mail: i

Seite 2

MOUNTING BRACKETSCREW 4 REQUIREDFig. 3Fig. 4Fig. 5Fig. 6Fig. 7Fig. 5BFig. 6BSurface Mounting: Drill appropriate holes in panel, using the dimension

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