Description

Series HF In-Line Flow Monitors

For Air, Water or Caustic Fluids, ±2% FS, Unrestricted Mounting, High Temperature and Pressure Options

The 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 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.

 

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

 

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