Call Us: (973) 256-3000 Plast-O-Matic Valves, Inc.
1384 Pompton Avenue
Cedar Grove, NJ 07009 USA

Differential Pressure Flow Meter
Series DPFM


  • Large, rugged flow nozzle for minimal pressure drop
  • Isolated magnetic movement
  • Highly visible 3.5" gauge
  • 1/2" NPT connection with 0-10 GPM gauge
  • 2" NPT connection with choice of 0-50, 0-100 or 0-200 GPM gauge
  • Long life, wear-resistant design
  • Non-clogging design
  • Corrosion-resistant thermoplastic connections; PVC or CPVC
  • EPDM or FKM elastomers
  • All metal parts in process are 100% Teflon coated to eliminate corrosion and contamination
  • Made in USA

This design features a spring-loaded diaphragm and magnetic movement to measure the pressure drop across a fixed orifice. Flow rate is proportional to the square root of the resulting differential, and directly displayed on the dial as gallons per minute. The magnetic movement is isolated from the liquid, with no linkages or other mechanical parts prone to variations or failure. Overall accuracy is 2% full scale ascending, with repeatability at 1%. These gauges feature a 5:1 turndown ratio; dial starting mark is 20% of full scale. Maximum pressure rating is 100 PSI. Connections are FNPT. For other options, please contact factory.


DPFM 1/2"


Part Numbers:

Notes -- Body and Seal Materials: All part numbers shown with FKM (Viton) seals.
For EPDM seals, change first "V" to "EP". For example, DPFM050V-PV-10 becomes DPFM050EP-PV-10.
Additional wetted materials include Teflon coated 302 stainless steel spring and Teflon coated ceramic magnet. 3" Dial is Lexan case with tempered glass lens.

For alternate materials or other requirements, please contact our Technical Services team at 973-256-3000.

Pressure/Temperature Ratings:

Maximum temperature rating is 140ºF for PVC, 180ºF for CPVC. Maximum line pressure rating for DPFM is 100 PSI.

Plast-O-Matic Valves, Inc. 1384 Pompton Avenue Cedar Grove,
NJ 07009 USA Phone: (973) 256-3000 Fax: (973) 256-4745
California Warehouse 4054 Brewster Way Riverside, CA 92501
Email: Legacy home page: please click here