Dwyer Instruments SERIES RM Catalog Page

SERIES RM

RATE-MASTER® POLYCARBONATE FLOWMETERS

FLOW

2˝, 5˝ or 10˝ Scale, Interchangeable Bodies

BACK

WIDTH

Flowmeters,

Variable Area & In-Line

FULL OPEN

DIMENSIONS - FLOWMETER

Model RMA Model RMB Model RMC

4-9/16 [115.90]

3 [76.20] 1/8 NPT conn.

1-5/8 [41.28] 10-32 mtg. holes

3/8 [9.525]

1-1/16 [26.99]

1-3/16 [30.16]

11/16 [17.46]

Model RMC

10˝ scale, 15-3/8˝ high

Model RMB-SSV

5˝ scale, 8-3/4˝ high

Model RMA-TMV

2˝ scale, 4-13/16˝ high

61/64 [24.21]

1-3/8 [34.92]

3/4 [19.05)

4-13/16 [122.20]

1 [25.40]

8-1/2 [215.90] 6-7/16 [163.50] 1/4 NPT conn. 3-15/16 [100.00] 1/4-20 mtg. holes 5/8 [15.88] 1-7/8 [47.63] 1-3/4 [44.45] 1 [25.40] 1-7/16 [36.51] 1-13/16 [46.04] 1-1/4 [31.75] 8-3/4 [222.30] 1-1/2 [38.10]

15-1/8 [384.20] 12-1/4 [311.20] 1/2 NPT conn. 8-3/4 [222.30] 3/8-24 mtg. holes 1 [25.40] 2-3/4 [69.85] 2-1/2 [63.50] 1-7/16 [36.51] 1-31/32 [50.00] 2-1/2 [63.50] 2 [50.80] 15-3/8 [390.50] 2-1/4 [57.15]

The Series RM Rate-Master® Polycarbonate Flowmeters are a line of general use,

direct reading precision owmeters suitable for both gas and liquid applications. This Series consists of 2˝ (51 mm), 5˝ (127 mm) and 10˝ (254 mm) scales that can be panel

or surface mounted with optional precision metering valves. Within a given Series, the Rate-Master

owmeter bodies can be instantly interchanged, allowing the piping to

remain undisturbed, interchangeability of the ranges, and easy cleaning.

FEATURES/BENEFITS

• Direct reading scales eliminate the need for troublesome conversions

• Stainless steel backbone absorbs piping torque reducing installation damage and

cost

• Shatter-proof polycarbonate allows for long operation life

• Precision injection molding around a precision tapered pin enables high repeatability

• Increased reading accuracy with special integral ow guides that stabilize oat

movement

• Scale graduations on both side of the indicating tube allow for instantaneous ow

reading saving time

APPLICATIONS

• Medical equipment

• Air samplers

• Gas analyzers

• Pollution monitors

• Chemical injectors

• Cabinet purging

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SPECIFICATIONS Service: Compatible gases and liquids. Wetted Materials: Body: Polycarbonate; O-ring: Neoprene and Buna-N; Metal

parts: SS (except for optional brass valve); Float: SS, black glass, aluminum, K monel, tungsten carbide depending on range.

Temperature Limit: 130°F (54°C). Pressure Limit: 100 psi (6.9 bar). Accuracy: RMA: 4%; RMB: 3%; RMC: 2% of FS. Process Connection: RMA: 1/8˝; RMB: 1/4˝; RMC: 1/2˝ female NPT.

Weight: RMA: 4 oz (113.4 g); RMB: 13 oz (368.5 g); RMC: 39 oz (1105.6 g). Agency Approvals: Meets the technical requirements of EU Directive 2011/65/EU

(RoHS II).

CAUTION: Dwyer

Rate-Master® owmeters are designed to provide satisfactory

long term service when used with air, water, or other compatible media. Refer to factory for information on questionable gases or liquids. Caustic solutions, anti-freeze (ethylene glycol) and aromatic solvents should denitely not be used.

SERIES RM

RATE-MASTER® POLYCARBONATE FLOWMETERS

Gas Flow from 0.05 to 1800 SCFH, Water Flow to 10 GPM

FLOW

RANGE CHART - RMA 2˝ SCALE - POPULAR RANGES Range No. SCFH Air Range No. LPM Air

1 2 3

5 6 7

8 9

Range No. CC/Min. Air Range No. GPH Water

151* 150* 11 12 13 14

*Accuracy ±8%

RANGE CHART - RMB 5˝ SCALE - POPULAR RANGES Range No. SCFH Air Range No. SCFH & LPM Air

49*

50 51 52 53 54 55 56 57

Range No. GPH Water

82 83

85 *Accuracy ±5%

.05 to .4 .1 to 1 .2 to 2 .5 to 5 1 to 10 2 to 20 5 to 50 10 to 100 15 to 150 20 to 200

5 to 50 10 to 100 30 to 200 50 to 500 100 to 1000 200 to 2500

0.5 to 5 1 to 10 3 to 20 4 to 50 10 to 100 20 to 200 40 to 400 50 to 500 60 to 600

1 to 12 1 to 20 4 to 40 10 to 100

26 21 22 23 24 25

Range No. CC/Min. Water

32 33 34

42 43

50D 51D 52D 53D 54D

Range No. GPH & LPM Water

82D 83D 85D

.5 to 5 1 to 10 2 to 25 5 to 50 5 to 70 10 to 100

5 to 50 10 to 110 20 to 300

1 to 11 2 to 24 4 to 34 5 to 50

1.2 to 10/0.6 to 5 2 to 20/1 to 9.5 4 to 50/2 to 23 10 to 100/5 to 50 20 to 200/10 to 95

1 to 12/0.06 to 0.76 1 to 20/0.065 to 1.25 10 to 100/0.8 to 6.2

MODEL CHART

Model Description RMA-X

RMA-X-BV+ RMA-X-SSV+ RMA-X-TMV*+ RMB-X RMB-X-BV+ RMB-X-SSV+ RMC-X RMC-X-BV+ RMC-X-SSV+

How To Order: Series-Range No.(“X”)-Valve-Option Example: RMA-2-SSV

(Series RMA with .1-1 SCFH air range & stainless steel valve)

*Provide same precision construction but for vacuum applications. +Valve is designed for ow adjustment only, not intended to be used as an open/shut-off valve.

OPTIONS To order add sufx: Description

-NIST

-APF

-BPF

-CPF Note: Special ranges, scales, mounting arrangements, etc., are

available on special order, or in OEM quantities.

Standard RMA RMA with brass valve RMA with stainless steel valve RMA with top mounted valve Standard RMB RMB with brass valve RMB with stainless steel valve Standard RMC RMC with brass valve RMC with stainless steel valve

NIST traceable calibration certicate Adjustable pointer ag for Series RMA Adjustable pointer ag for Series RMB Adjustable pointer ag for Series RMC

Adjustable pointer ags

Red lined pointer ags provide quick visual reference to a required ow level. Of clear plastic, they snap into place inside bezel and slide to desired level.

Variable Area & In-Line

Flowmeters,

RANGE CHART - RMC 10˝ SCALE - POPULAR RANGES Range No. SCFH Air Range No. GPH Water

101 102 103 104 105 106 107 108

Range No. SCFM Air

121 122 123

5 to 50 10 to 100 20 to 200 40 to 400 60 to 600 100 to 1000 120 to 1200 200 to 1800

1 to 10 2 to 20 4 to 30

134 135

Range No. GPM Water

141 142 143 144 145

2 to 20 8 to 90

.1 to 1 .2 to 2.2 .4 to 4 .8 to 7

1.2 to 10

ACCESSORIES

Model Description RKA RK-RMB

Regulator kit for Series RMA Regulator kit for Series RMB

Regulator kits

Available as optional extras for both Rate-Master® Flowmeters

and Visi-Float VFA Visi-Float

differential pressure regulator. Recommended for use where inlet air pressure uctuates widely and constant ow is required. The regulator maintains a constant pressure differential of approximately 3 ±.15 psig. Supply pressure must be at least 3 psig above the owmeter discharge to operate. The standard regulator may be used with any Dwyer Series RM or VF owmeter up to 200 scfh. For higher ow rates consult the factory.

USA: California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Flowmeters models. This view shows Model

owmeter with integrally connected constant

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