Page 12
High Capacity Flowmeters
Models FM-1127 Series (127mm) and Model FM-1100 Series (70mm)
Description

The FM-1100 and FM-1127 Series Flowmeters are offered as a simplified solution to the problem of fluid flow indication at higher capacity levels than the FM-1050 and FM-1000 Series Flowmeters. These meters are designed to withstand the physical abuse and environmental corrosion of industrial applications.

The FM1100 is available in several ranges of 70mm direct reading scales, and the FM1127 in 127mm direct reading scales. Choose between English or Metric units.
A one-piece aluminum channel frame encloses the end blocks, fittings and glass metering element for maximum meter protection and safety. Eight standard connection variations are made possible by three off-the-shelf end block configurations.

The precision tapered metering tube has integral float guides to ensure float fidelity. The scale is permanently screened on an acrylic window inset in the meter case which makes it interchangeable for economical alteration of meter applications. A float/scale correlation symbol is marked on the window to eliminate error during application changes. The reading edge of the machined float provides precision read-out delineation. Reading edge instructions are also screened on the scale window.

Design Features
  • Precision tapered, fluted metering tube
  • Fully protected assembly using aluminum meter case
  • Unobstructed flow path area for low pressure drop increases available flow rates at low feed pressures
  • Precision machined float
  • Spring float stops absorb line shock
  • Float/Scale correlation symbol and float reading edge instructions permanently screened on meter window
  • Corrosion resistant option: all wetted parts of 316 stainless steel with Viton® or EPR seals
  • Custom scales and flow curves available
Specifications
Pressure Rating: 200 psig maximum operating pressure @ 200ºF
Temperature Rating: 250ºF maximum operating temperature
Accuracy: ±10% of full scale flow rate
Range: 10 to 1, i.e., 100% to 10% of full scale
Scale Reading: Direct reading air. Special other scales available
Shipping Weight: 2 lbs

Materials of Construction
Wetted End Blocks, Fittings and Internal Parts: Brass or 316 stainless steel
Seal Materials: Buna-N or Viton®— standard; Teflon®, Kalrez® or EPR — optional
Meter Case: Black painted or anodized aluminum with acrylic window
Metering Tube: Borosilicate glass
Piping Connections: Brass or 316 stainless steel 3/8" female NPT (see Accessories for optional connections)
Float Material: 316 stainless steel
Scale:

Permanently screened on inside of meter window, length FM-1100 — 70mm or FM-1127 — 127mm.

Page 13
Flow Tube Capacities for FM-1100 and FM-1127 Series Flowmeters, Direct Reading Scales
FM-1100 Series
Tube No. Air (SCFM)* Tube No. Air (SLPM)* Tube No. Water (GPM) Tube No. Water (LPM)
               
A121 0.5-4 A125 10-120 A111 0.1-1 A116 0.5-3.5
A122 1-9 A126 20-260 A112 0.2-2 A117 0.5-8
A123 1-12 A127 20-340 A113 0.2-3 A118 1-10
A124 1-15 A128 50-500 A114 0.5-4 A119 1-15
A115 0.5-5 A120 2-20
*All air flow rates are at 70ºF and 14.7 psia

Flow Tube Capacities for FM-1100 and FM-1127 Series Flowmeters, Direct Reading Scales
FM-1127 Series
Tube No. Air (SCFM)* Tube No. Air (SLPM)* Tube No. Water (GPM) Tube No. Water (LPM)
B121 0.2-4 B125 5-120 B111 0.05-1 B116 0.2-3.5
B122 0.5-9 B126 20-260 B112 0.1-2 B117 0.5-8
B123 0.5-11 B127 20-320 B113 0.2-3 B118 0.5-12
B124 1-16 B128 20-500 B114 0.2-4 B119 1-16
B115 0.5-5 B120 1-22
*All air flow rates are at 70ºF and 14.7 psia
Ordering Information
Model Series Number of
Metering Tubes		 End Blocks/
Seal Material		 Valve Types Connections Accessories Connection Orientation Flow Tube
(Capacities)
— —

To build a Rotometer Part Number, use our Rotometer Model Number Builder.
Model Number Generator for FM-1100 Series & FM-1127 Series Glass Tube Flowmeters
MODEL SERIES VALVE TYPES CONNECTION ORIENTATION*
A = Model FM-1100 Glass Tube Flowmeter with 65mm tube J = Valve on Inlet 1 = Back In and Back Out
B = Model FM-1127 Glass Tube Flowmeter with 127mm tube L = Valve on Outlet 2 = Vertical In and Vertical Out
NUMBER OF METERING TUBES Y = No Valve/No Plug 3 = Vertical In/Back Out
1 = Single Tube Unit CONNECTIONS 4 = Back In/Vertical Out
END BLOCKS/SEAL MATERIAL 2 = 1/4 NPT Female FLOW TUBE (CAPACITIES)
4 = 316 Stainless Steel with Viton® Seals 7 = 3/8 NPT Female AXXX = See Capacity Table For FM-1100 Series Flowmeters
6 = 316 Stainless Steel with Teflon® Seals 8 = 1/2 NPT Female BXXX = See Capacity Table For FM-1127 Series Flowmeters
8 = Brass with Buna-N Seals ACCESSORIES These are Direct Reading Scale Flowmeters. Inquire for other tube scales available.
C = Brass with Viton Seals 0 = None
D = 316 Stainless Steel with Buna-N Seals 8 = Externally Threaded Connections for Panel Mounting
E = 316 Stainless Steel with EPR Seals 9 = Clean for Oxygen Service
N = 316 Stainless Steel with Kalrez® Seals

 

                                                                                                                                                                                                                                                                                                                                        Page 14
Model FM-1127 Series Flowmeter Dimensions