Dwyer HF Series Flow Monitor - Sherman Instruments

HF Series Inline Flow Monitor

For Air, Water or Caustic Fluids.
Ranges from 2-22 SCFM, 0.5-35 GPM.
Maximum pressures from 600 to 6000 PSIG!

Low Cost, Durable Flow Monitors have a patented design based on a floating sharp-edged orifice disk and variable area flow measurement to yield accuracy of +/-2.5% over center one-third of scale. 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. Flowing media forces linear motion of a spring loaded, sharp edge orifice disk and ring shaped transfer magnet which both ride on a tapered center shaft. The transfer magnet drives a clearly visible magnet follower located outside the flow tube, protected under the clear Lexan® tube. A ring on the magnet follower indicates flow rate on the direct reading scale. Rubber bumpers are provided for external impact resistance.

**Dimensions**
Connection Size	"A"	"B"	"C"
1/4" to 1/2" NPT 3/4" to 1" NPT	1-7/8" (48mm) 2-3/8" (60mm)	1-1/4" (32mm) 1-3/4" (45mm)	6-9/16" (167mm) 7-1/8" (181mm)

Specifications

Maximum Temperature	HFA, HFB and HFS: 240°F (116°C) HFH: 400°F (204°C)
Maximum Pressure	HFA: 600 PSIG (4100 kPa) HFB and HFH: 3500 PSIG (24,000 kPa) HFS: 6000 PSIG (41,300 kPa)
Accuracy	±4% FS over entire range; ±2.5% over centre third of measuring range.
Repeatability	±1% of full scale
Viscosity	500 SSU
Wetted Parts	Body: Aluminum, brass or 304 stainless steel Seals: Buna-N or Viton® Magnet: Teflon coated Alnico Other internal parts: 304 S.S.
Shipping Weight	1/4" to 1/2" NPT models: 2 lbs (0.9 kg) 3/4" to 1" NPT models: 3.5 lbs (1.59 kg) 1½" NPT models: 11 lbs (5 kg)

®Viton is a registered trademark of DuPont Dow Elastomers

Models

**Aluminum body for air or other non-corrosive gases:**
Model Number	Connection Size	Range, Air SCFM
HFA-1-12 HFA-1-22	1/4" NPTF 1/4" NPTF	2-12 2-22

**Brass body for water based fluids (non-steam)**
Model Number	Connection Size	Range, Water GPM (LPM)
HFB-2-05 HFB-3-15 HFB-3-20 HFB-4-35 HFB-5-50	1/2" NPTF 3/4" NPTF 3/4" NPTF 1" NPTF 1½" NPTF	0.5-5.0 (1-19) 2-15 (7.5-55) 2-20 (7.5-75) 5-35 (19-130) 5-50 (19-189)

**304 Stainless Steel body for high pressure fluids.**
Model Number	Connection Size	Range, Water GPM (LPM)
HFS-2-02 HFS-2-10	1/2" NPTF 1/2" NPTF	0.2-2.0 (0.75-7.5) 0.5-10 (1.9-38)

**High Temperature Brass Body for water based fluids**
Model Number	Connection Size	Range, Water GPM (LPM)
HFH-2-05 HFH-2-10 HFH-4-25	1/2" NPTF 1/2" NPTF 1" NPTF	0.5-5.0 (1-19) 1-10 (3.8-38) 5-35 (19-130)

Contact Us!

Sherman Instruments
John Sherman Agencies Ltd.
1641 Venables Street
Vancouver, BC
V5L 2H1

Phone: 604-254-9622
Fax: 604-254-3123
e-mail: info@johnsherman.com