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Global Purgemaster Series 6100 Variable Area Flowmeter

Global Purgemaster Series 6100 Variable Area Flowmeter

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The Purgemaster Purge Meters are low capacity variable area flowmeters for both liquid and gas with an excellent selection of material and scale lengths in a single product family design. They provide optimum flexibility with minimum component proliferation. The meter features a corrosion resistant, high strength stainless steel body, quick, easy snap-in tube construction and a safety tested operator protection shield.

The Purgemaster is ideal for such applications as the purging of control lines and instrument enclosures. Their use is easily extended into fluid sampling, liquid specific gravity, and level measurement and similar services.

  • High Strength Stainless Steel Body - Rigid construction to maintain tube alignment and resistance to pipe strain.
  •  "Snap-in" Tube Construction - Minimizes the downtime needed to clean the meter tube or to change the meter range.
  • Optimum Variety - Available in 1-1/2, 3, 5,and 10 inch scale lengths and end fitting materials of stainless steel and KYNAR®
  • Internal Back check - Restricts back flow and draining of process fluid when metering tube is removed. (Not available with outlet control valve.)
  • Control Valve - The optional control valve provides a smooth fine degree of adjustment.
  • Versatile Flow Controller - The optional Differential Pressure Regulator is designed to give reliable flow control regardless of changes in upstream pressure.
  • Adjustable Alarms - Single (min. or max.)or Dual (min. & max) alarm sensors are adjustable over the entire meter range.

Engineering Specifications




Rangeability: 10 to 1 or greater

Operational Limits:32°F to 140°F (0ºC to 60°C): 32°F (0°C): Full vacuum. If vacuum conditions require a control valve, it should be in the outlet fitting.

Ambient Temperature Limits:

Minimum Temperature

Minimum Pressure

Maximum Process Temperature and Pressure: Temperature and pressure are interdependent but the listed combination limits must not be exceeded.

Materials of Construction:


Tube*: Borosilicate glass

Floats*: Refer to Capacity Tables (Table I, II, III, & IV)*: 316 stainless steel and KYNAR®*: 316 stainless steel or KYNAR® with stainless end fittings, KYNAR® with Kynar end fittings

End Fittings

Tube Adaptor

Tube Adaptor Spring*: 316 stainless steel with stainless steel end fittings, Hastelloy "C" with KYNAR® end fittings.*: 1-1/2 and 3 inch meters 316 stainless steel with stainless steel end fittings, Hastelloy "C" with KYNAR® end fittings; 5 and 10 inch meter - Teflon.: Teflon

Float Stop

Tube Rest Gasket

O-Ring*: Viton when stainless or KYNAR® end fittings are specified.

Optional: Butyl Rubber, Ethylene Propylene Rubber and Kalrez.®*: Stainless steel with stainless fittings; KYNAR® tip over stainless steel (non-process wetted) with KYNAR® fittings.*: Teflon

Valve Stem

Internal Back check

Body: 304 stainless steel

Shield: Polycarbonate

*Process wetted parts

Scale Length 

Standard Accuracy 

Optional Accuracy 

1-1/2” (38 mm) 



3” (75 m) 



5” (127 mm) 



10” (250 mm) 



* Except tube number FP-1/16-xx-G5 which have ±5% standard accuracy and ±2% optional accuracy.

: 0.5% of full scale reading.

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