Dwyer Series HF In-Line Flow Monitors

The Dwyer SERIES HF In-Line Flow Monitors are ruggedly constructed and ideal for direct measurement for a range of compatible gases, oil or water-based liquids. This Series is designed based on a floating orifice disk and variable area flow measurement. Flowing media forces linear motion of the orifice disk and a ring-shaped magnet which ride on a tapered centre shaft. The transfer magnet drives a clearly visible magnet follower located outside the flow tube, and a ring on the magnet follower indicates flow rate on the direct reading scale.

Product Applications

  • Setting pressure relief valves
  • Fluid handling equipment
  • Detecting low-flow rates for lubricating liquids
  • Pulp and paper
  • Industrial maintenance
  • Fluid power
  • Heating loop flow

Service : Compatible gases or liquids.

Wetted Materials : HFA: Aluminum casing, Buna-N seals, PTFE coated Alnico magnet, SS disk; HFB: Brass casing, Buna-N seals, PTFE coated Alnico magnet, SS disk; HFS: 303 SS casing, FKM seals with PTFE backup, PTFE coated Alnico magnet, SS disk.

Maximum Viscosity : 500 SSU.

Temperature Limits : 240°F (116°C).

Pressure Limits : HFA, HFB, HFL and HFH skus: 600 psig (41 bar) for air and gas, 3500 psig (241 bar) for liquids;HFS Model: 1000 psig (70 bar) for air and gas, 6000 psig (413 bar) for liquids.

Accuracy : ±4% FS over entire range; ±2.5% over center third of the measuring range.

Repeatability : ±1% of FS.

Shipping Weight : 1/4″ to 1/2″ female NPT skus; 2 lb (0.9 kg);
3/4″ to 1″ female NPT skus: 3.5 lb (1.59 kg); 1-1/2″ female NPT skus: 11 lb (5 kg);2″ female NPT skus: 13.5 lb (6.12 kg).

  • This unique design allows accurate performance with fluid viscosities up to 500 SSU
  • All internal wetted parts are contained inside a sealed metal tubular casing assuring a virtually maintenance-free unit
  • Increased application versatility with no inlet or outlet straight plumbing requirement and can be mounted horizontally, vertically, or inverted
  • Rugged construction allows for high pressure and temperature rating for long operation life

Catalogue: Dwyer_Series-HF_Catalog
Manual: Dwyer_HF_Manual

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