DWYER HF InLine Flow Monitors

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Description

Series HF In-Line Flow Monitors For Air, Water or Caustic Fluids, ±2% FS

 

DWYER HF InLine Flow Monitors are ruggedly constructed and ideal for direct measurement for a range of compatible gases, oil or water based liquids. DWYER HF InLine Flow Monitors 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 center 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.

 

Features

  • 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

 

Specifications

  • 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 models: 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: ±2% FS.
  • Repeatability: ±1% of FS.
  • Shipping Weight: 1/4″ to 1/2″ female NPT models; 2 lb (0.9 kg); 3/4″ to 1″ female NPT models: 3.5 lb (1.59 kg); 1-1/2″ female NPT models: 11 lb (5 kg); 2″ female NPT models: 13.5 lb (6.12 kg).

 

Models & Ordering

Aluminum Body for Oil Based Fluids

Model Description
HFL-2-05 In-line flow monitor, 1/2″ female NPT, 0.5-5 GPM (1-19 LPM) oil.
HFL-4-25 In-line flow monitor, 1″ female NPT, 2-25 GPM (7.5-95 LPM) oil.

 

Brass Body for Water Based Fluids (Non-steam)

Model Description
HFB-2-05 In-line flow monitor, 1/2″ female NPT, 0.5-5 GPM (1-19 LPM) water.
HFB-3-15 In-line flow monitor, 3/4″ female NPT, 2-15 GPM (7.5-55 LPM) water.
HFB-3-20 In-line flow monitor, 3/4″ female NPT, 2-20 GPM (7.5-75 LPM) water.
HFB-4-35 In-line flow monitor, 1″ female NPT, 5-35 GPM (19-130 LPM) water.
HFB-5-100 In-line flow monitor, 1-1/2″ female NPT, 10-100 GPM (38-379 LPM) water.
HFB-5-50 In-line flow monitor, 1-1/2″ female NPT, 5-50 GPM (19-189 LPM) water.
HFB-6-150 In-line flow monitor, 2″ female NPT, 20-150 GPM (76-568 LPM) water.
HFB-6-75 In-line flow monitor, 2″ female NPT, 8-75 GPM (31-284 LPM) water.

 

304 SS Body for High-pressure Fluids

Model Description
HFS-2-02 In-line flow monitor, 1/2″ female NPT, 0.2-2 GPM (.75-7.5 LPM) water.
HFS-2-10 In-line flow monitor, 1/2″ female NPT, 0.5-10 GPM (1.9-38 LPM) water.

 

Brass Body High Temperature 400° F for Water Based Fluids

Model Description
HFH-2-05 In-line flow monitor, 1/2″ female NPT, 0.5-5 GPM (1-19 LPM) water.
HFH-2-10 In-line flow monitor, 1/2″ female NPT, 1-10 GPM (3.8-38 LPM) water.
HFH-4-35 In-line flow monitor, 1″ female NPT, 5-35 GPM (19-130 LPM) water.HFH-2-05

 

 

Additional information

Model

HFL-2-05, HFL-4-25, HFB-2-05, HFB-3-15, HFB-3-20, HFB-4-35, HFB-5-100, HFB-5-50, HFB-6-150, HFB-6-75, HFS-2-02, HFS-2-10, HFH-2-05, HFH-2-10, HFH-4-35

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