Model RMB-SSV ... Model RMA-2˝ Scale Model RMB-5˝ Scale. Model RMC-10˝ Scale ... 40-400. 60-600. 100-1000. 120-1200. 200-1800. SCFM Air.
Series RM
Rate-Master® Flowmeters
Polycarbonate, Gas Flow from 0.05-1800 SCFH, Water Flows to 10 GPM
J
F
BACK
WIDTH
A
K
BC
FLOW
Flowmeters, Variable Area
E D
G
I
L
FULL OPEN
H
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
Flowmeter Dimensions
Model RMA A 4 -9/16 [115.90]
Model RMB 8-1/2 [215.90]
Model RMC 15 -1/8 [384.20]
B 3 [76.20]
6-7/16 [163.50]
12 -1/4 [311.20]
1/8 NPT CONN. 1/4 NPT CONN.
1/2 NPT CONN.
C 1-5/8 [41.28]
3-15/16 [100.00] 8-3/4 [222.30]
10-32 MTG. HOLES 1/4-20 MTG. HOLES 3/8-24 MTG. HOLES
D 3/8 [9.525]
5/8 [15.88]
1 [25.40]
E 1-1/16 [26.99]
1-7/8 [47.63]
2-3/4 [69.85]
F 1-3/16 [30.16]
1-3/4 [44.45]
2-1/2 [63.50]
G 11/16 [17.46]
1 [25.40]
1-7/16 [36.51]
H 61/64 [24.21]
1-7/16 [36.51]
1-31/32 [50.00]
I 1-3/8 [34.92]
1-13/16 [46.04]
2-1/2 [63.50]
J 3/4 [19.05)
1-1/4 [31.75]
2 [50.80]
K 4-13/16 [122.20] 8-3/4 [222.30]
15-3/8 [390.50]
L 1 [25.40]
1-1/2 [38.10]
2-1/4 [57.15]
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The Rate-Master® flowmeter line of direct reading precision flowmeters incorporates many unique user features at moderate cost. These low cost flowmeters are ideal for general use.
Easy to read design -- The direct reading scales eliminate troublesome conversions. The scales are brushed aluminum, coated with epoxy and the graduations are on both sides of the indicating tube. Special integral flow guides stabilize the float throughout the range to keep it from hunting or wandering in the bore. The float is highly visible against a white background.
Construction assures accuracy -- All Rate-Master® flowmeter bodies are injection molded of tough, clear, shatter-proof polycarbonate plastic around a precision tapered pin. The result is accurate and repeatable readings. The single piece plastic body is mounted to a stainless steel back bone into which pipe thread inserts are welded to absorb piping torque. Precision metering valves of brass or stainless steel (specify BV or SSV on order) are available as an optional extra and permit precise flow adjustments. For vacuum applications, Model RMA units are available with top mounted valves (specify TMV). The small Series RMA models are accurate within ±4% of full-scale reading; Series RMB within ±3%; large Series RMC within ±2%.
Installation is simple -- The Rate-Master® Flowmeter can be neatly panel mounted to keep flow tube centers in the same plane as the panel surface or surface mounted on the panel by means of tapped holes in the backbone. When through-panel mounted, the bezel automatically positions the instrument at the correct depth in the panel cutout. Surface mounted units can also be held in place by the piping. All mounting hardware plus installation and operating instructions are included.
Easy-to-Interchange bodies -- Within a given Series Rate-Master® flowmeter bodies can be instantly interchanged. Simply "unplug" the body from backbone and replace it with another. O-rings provide a tight seal on inlet and outlet. Piping remains undisturbed. Interchangeability is useful where different scale ranges are sometimes required at the same location in the laboratory or plant.
Cleaning is easy -- To release the plastic flowmeter body from the stainless steel backbone, just remove four screws. Pipe thread flow connections remain undisturbed. Remove the slide cover and the plug ball stop, clean the flow tube with soap and water and reassemble. It's that simple.
1.800.561.8187 146
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.com
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FLOW
How To Order Series-Range No.("X")-Valve-Option Example: RMA-2-SSV Series RMA with .1-1 SCFH Air Range & Stainless Steel Valve
RMA Model RMA-X RMA-X-BV RMA-X-SSV RMA-X-TMV
Description Standard RMA RMA with Brass Valve RMA with Stainless Steel Valve RMA with Top Mounted Valve*
RMB
Model RMB-X RMB-X-BV RMB-X-SSV
Description Standard RMB RMB with Brass Valve RMB with Stainless Steel Valve
RMC
Model
Description
RMC-X
Standard RMC
RMC-X-BV RMC-X-SSV
RMC with Brass Valve RMC with Stainless Steel Valve
*Top mounted metering valves provide same precision
construction but for vacuum applications.
RMAmodels only.
Popular Ranges
Model RMA-2 Scale Model RMB-5 Scale
Model RMC-10 Scale
Range
Range Range
Range Range Range
SCFH Air
No. SCFH Air
No. SCFH Air No.
.05-.5 .1-1
1
.5-5
2
1-10
49+ 5-50
101
50 10-100 102
.2-2
3
3-20
51 20-200 103
.5-5
4
4-50
52 40-400 104
1-10
5
10-100
53 60-600 105
2-20
6
20-200
54 100-1000 106
5-50
7
40-400
55 120-1200 107
10-100 15-150
8
50-500
9
60-600
56 200-1800 108 57 SCFM Air
20-200
10 Gal. Water
1-10
121
CC Air/min.
per hour
2-20
122
5-50
151* 1-12
82 4-30
123
10-100
150* 1-20
83 Gal. Water
30-240
11 4-40
84 per hour
50-500
12 10-100
85 2-20
134
100-1000
13 SCFH & LPM Air
8-90
135
200-2500
14 1.2-10/0.6-5
50D Gal.Water
LPM Air
3-20/1.5-9.5
51D per minute
.5-5
26 4-50/2-23
52D .1-1
141
1-10
21 10-100/5-50
53D .2-2.2
142
2-25
22 20-200/5-95
54D .4-4
143
5-50
23 GPH & LPM Water
.8-7
144
5-70
24 1-12/0.06-0.76
1.2-10
145
10-100
25 1-20/0.065-1.25 82D
CC Water/min.
10-100/0.8-6.2
83D
5-50
32
85D
10-110
33
20-300
34
Gal.Water/hr
1-11
42
2-24
43
4-34
44
5-50
45
*Accuracy ±8%
+Accuracy ±5%
Valve is designed for flow adjustment only, not intended to be used as an
open/shut-off valve.
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 full-scale. 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).
CAUTION Dwyer® Rate-Master® flowmeters 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 definitely not be used.
OPTIONS & ACCESSORIES Adjustable pointer flags Red lined pointer flags provide quick visual reference to a required flow level. Of clear plastic, they snap into place inside bezel and slide to desired level.
Model RMA-X-APF, Adjustable Pointer Flag for RMA Series Model RMB-X-BPF, Adjustable Pointer Flag for RMB Series Model RMC-X-CPF, Adjustable Pointer Flag for RMC Series
Regulator Kits Available as optional extras for both Rate-Master® Flowmeters and Visi-Float® Flowmeters models. This view shows Model VFA Visi-Float® flowmeter with integrally connected constant differential pressure regulator. Recommended for use where inlet air pressure fluctuates widely and constant flow is required. The regulator maintains a constant pressure differential of approximately 3 ± .15 psig. Supply pressure must be at least 3 psig above the flowmeter discharge to operate. The standard regulator may be used with any Dwyer Series RM or VF flowmeter up to 200 scfh. For higher flow rates consult the factory.
Model RKA, Regulator Kit for RMA Series Model RK-RMB, Regulator Kit for RMB Series
OPTION -NIST, NIST traceable calibration certificate
Specials Special ranges, scales, mounting arrangements, etc., are available on special order, or in OEM quantities.
Flowmeters, Variable Area
1.800.561.8187 information@itm.com CONTACT US | U.S. 219/879-8000 | U.K. (+44) (0)1494-461707 | A.U. (+61) (0) 2 4272 2055 | China +852-23181007
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