SERIESRM DWYER | Alldatasheet

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RATE-MASTER® POL YCARBONATE FLOWMETERS 2˝, 5˝ or 10˝ Scale, Interchangeable Bodies DWYER INSTRUMENTS, LLC | dwyer-inst.com246 The Series RM Rate-Master® Polycarbonate Flowmeters are a line of general use, direct reading precision flowmeters 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® flowmeter bodies can be instantly interchanged, allowing the piping to remain undisturbed, interchangeability of the ranges, and easy cleaning. BENEFITS/FEATURES

  • Eliminate the need for troublesome conversions with direct reading scales
  • Reduce installation damage and cost due to stainless steel backbone that absorbs piping torque
  • Long operation life with durable, shatter-proof polycarbonate body
  • High repeatability enabled by precision injection molding around a precision tapered pin
  • Increased reading accuracy with special integral flow guides that stabilize float movement
  • Save time with instantaneous flow reading from scale graduations on both sides of the indicating tube

APPLICATIONS

  • Medical equipment
  • Air samplers
  • Gas analyzers
  • Pollution monitors
  • Chemical injectors
  • Cabinet purging Flowmeters, Variable Area & In-Line A B C D E F G H I J K L FULL OPEN BACK WIDTH 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 DIMENSIONS - FLOWMETER Model RMA Model RMB Model RMC A B C D E F G H I J K L 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] 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] SERIES RM VVIIDDEEOO OONNLLIINNEE SPECIFICATIONS Service: Compatible gases and liquids. Wetted Materials: Body: Polycarbonate; O-ring: Neoprene and Buna-N; Metal parts: SS; 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). Compliance: Meets the technical requirements of EU Directive 2011/65/EU (RoHS II). 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. FLOW CALIBRATION SERVICES AVAILABLE USA: California Proposition 65 WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Flowmeters, Variable Area & In-Line 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. 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. RATE-MASTER® POL YCARBONATE FLOWMETERS Gas Flow from 0.05 to 1800 SCFH, Water Flow to 10 GPM RANGE CHART - RMB 5˝ SCALE - POPULAR RANGES Range No. SCFH Air Range No. SCFH and LPM Air 49* 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 50D 51D 52D 53D 54D 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 Range No. GPH and LPM Water 82D 83D 85D 1 to 12/0.06 to 0.76 1 to 20/0.065 to 1.25 10 to 100/0.8 to 6.2 Range No. GPH Water 1 to 12 1 to 20 4 to 40 10 to 100 *Accuracy ±5%. RANGE CHART - RMC 10˝ SCALE - POPULAR RANGES Range No. SCFH Air Range No. GPH Water 101 102 103 104 105 106 107 108 5 to 50 10 to 100 20 to 200 40 to 400 60 to 600 100 to 1000 120 to 1200 200 to 1800 134 135 2 to 20 8 to 90 Range No. GPM Water 141 142 143 144 145 .1 to 1 .2 to 2.2 .4 to 4 .8 to 7 1.2 to 10 Range No. SCFM Air 121 122 123 1 to 10 2 to 20 4 to 30 SERIES RM DWYER INSTRUMENTS, LLC | dwyer-inst.com FLOW CALIBRATION SERVICES AVAILABLE MODEL CHART Model Description RMA-X RMA-X-SSV† RMA-X-TMV•† RMB-X RMB-X-SSV† RMC-X RMC-X-SSV† Standard RMA RMA with stainless steel valve RMA with top mounted valve Standard RMB RMB with stainless steel valve Standard RMC RMC with stainless steel valve How To Order: Series-Range No.(“X”)-Valve-Option Example: RMA-2-SSV (Series RMA with .1-1 SCFH air range and stainless steel valve)

  • Provide same precision construction but for vacuum applications. †Valve is designed for flow adjustment only, not intended to be used as an open/shut-off valve. ACCESSORIES Model Description RK-RMB RKA Regulator kit for Series RMB Regulator kit for Series RMA OPTIONS To order add suffix: Description -APF -BPF -CPF -NIST Adjustable pointer flag for Series RMA Adjustable pointer flag for Series RMB Adjustable pointer flag for Series RMC NIST traceable calibration certificate Note: Special ranges, scales, mounting arrangements, etc., are available on special order, or in OEM quantities. RANGE CHART - RMA 2˝ SCALE - POPULAR RANGES Range No. SCFH Air Range No. LPM Air 1** .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 5 1 to 10 2 to 25 5 to 50 5 to 70 10 to 100 Range No. CC/Min. Water 5 to 50 10 to 110 20 to 300 Range No. CC/Min. Air Range No. GPH Water 151* 150* 5 to 50 10 to 100 30 to 200 50 to 500 100 to 1000 200 to 2500 1 to 11 2 to 24 4 to 34 5 to 50 *Accuracy ±8%, NIST not available. **NIST not available. USA: California Proposition 65 WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.