All Primary Flow Signal Products

Primary Flow Signal offers a large selection of primary flow elements for your flow measurement needs. See our complete directory of flow products below.

Venturi Flow Meters

View All Venturi Flow Meters

Venturi meters offer High accuracy and reliability for flow measurement of pressurized line fluids, including liquids, gases, and steam, as well as high-viscosity line fluids, solids-bearing line fluids, and harsh or contaminated line fluids.

FV_Whole

HVT-FV Fabricated Venturi

+/- 0.50% Uncalibrated Uncertainty
Low Loss, Municipal & Industrial Applications

  • Line Size: 1/2 to 144 inches.
  • Headloss % of Differential: 3.50 to 10.0 percent
  • Recommended pipe Reynolds number: Greater than 75,000
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CI Whole

HVT-CI Cast Iron/ HVT-DI Ductile Venturi

+/- 0.50% Uncalibrated Uncertainty
Low Loss, Municipal & Industrial Applications

  • Line size: 4 to 96 inches.
  • Head loss % of Differential: 3.50 to 10.0 percent
  • Recommended pipe Reynolds number: Greater than 75,000 for basic accuracy
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FI_Whole

HVT-FI Fabricated Insert Venturi / HVT-PI Plastic Insert Venturi

+/- 0.50% Uncalibrated Uncertainty
Low Loss, Internal / Flange Mounted

  • Line size: 3 to 144 inches
  • Head loss % of Accuracy: 3.50 to 10.0 percent
  • Recommended pipe Reynolds number: Greater than 75,000 for basic accuracy
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HVT-FC Rate of Flow Controller-1

HVT-FC Rate of Flow Controller

+/- 0.50% Uncalibrated Uncertainty
Low Loss, Control Flow Rate

  • Line size: 4 to 96 inches
  • Head loss % of Differential (Venturi): 3.50 – 10.0 percent
  • Recommended pipe Reynolds number: Greater than 75,000 for basic accuracy
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MVC-006F

HVT-SMS Sealed Meter System

+/- 0.50% Uncalibrated Uncertainty
Low Loss, Highly Contaminated Fluid

  • Line sizes: 6 to 14 inches for 2 inch SMS; 16 to 96 inches for 3 inch SMS
  • Head loss % of Differential (Venturi): 3.50 to 10.0 percent
  • Recommended pipe Reynolds number: Greater than 75,000 for basic accuracy
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CV_Whole

CV Classical Venturi

+/- 1.00% to 1.50% Uncalibrated Uncertainty
Clean Liquids and Gases

  • Line size: 2 to 48 inches
  • Head loss % of Differential: 10 to 25 percent
  • Recommended pipe Reynolds number: Greater than 200,000 for basic accuracy. Consult PFS for lower Reynolds use.
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RV Whole

HVT-RV Rectangular Venturi

+/- 0.75% Uncalibrated Uncertainty
Low Loss, For Rectangular Conduits

  • Line size: 1/2 to 96 inches. Larger sizes available.
  • Head loss % of Differential: 5.0 to 12.0 percent
  • Recommended pipe Reynolds number: Greater than 75,000 for basic accuracy
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Orifice Flow Meters

View All Orifice Flow Meters

Orifice primary flow elements, flange unions, and holding block technologies offer optimum flexibility for applications with diverse piping schemes, ease of replacement, and a low capital investment.  The orifice plate is one of the most common differential elements for measuring clean liquids, gases, and vapor (steam) flow.

PFS application specialists can help you select from our wide range of stock product configurations, or our engineers can custom tailor a solution for your specific orifice flow meter requirements.

OP Concentric

OP Orifice Plates

Flow Measurement / Flow Restriction
+/- 0.5-0.75% Uncalibrated Uncertainty
Liquids and Gases, Lower Cost

  • Line size: 1/2 to 40 inches
  • Meets ISO, AGA, ASME, API requirements
  • Recommended pipe Reynolds number: Greater than 10,000 basic accuracy
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OUP Whole

OU Orifice Unions

+/- 0.50 to 0.75% Uncalibrated Uncertainty
Lower Cost, Field Welded Install

  • Line size: 1/2 to 40 inches
  • Meets ISO, AGA, ASME, API Requirements
  • Flange Taps / Corner Taps
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OUPFR Whole

Orifice Meter Runs

+/- 0.5 to 0.75% Uncalibrated Uncertainty
Liquids and Gases, pipe spools included

  • Honing available
  • Meets ISO, AGA, ASME, API Requirements
  • Supplied with any combination of NDE required
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Wedgetype Flow Meters

View All Wedgetype Flow Meters

Wedge flow metering is designed for highly viscous, slurry type, or contaminated line fluid applications, including difficult-to-meter, air entrained liquids, as well as particulate entrained, high viscosity, or slurry solutions. Examples of these applications include: raw sewage, sludge, tar sands, pulp mash, cement, liquid asphalt, and molten sulfur.

Wedge Meter Whole

WM Wedgetype Flow Meter

+/- 4.00% Uncalibrated Uncertainty
Dirty liquids and Slurries

  • Line size: 1/2 to 30 inches
  • Head loss % of Differential: 25 to 60 percent
  • Recommended pipe Reynolds number: Must be greater than 500 for basic accuracy
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WedgeX Whole

WX Wedge-X Meter

+/- 4.00% Uncalibrated Uncertainty
Integral Manifold, Replaceable Wedge

  • Line size: 2 inches
  • Head loss % of Differential: 25 to 60 percent
  • Recommended pipe Reynolds number: Must be greater than 5000 for basic accuracy
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PTC 6 & Nozzle Flow Meters

View All PTC 6 & Nozzle Flow Meters

Our PTC flow meters are high-performance differential-producing flow measurement devices used as the primary element for steam turbine acceptance tests. The meters are specifically manufactured in accord with the requirements of the ASME Performance Test Code 6 (PTC6) for steam turbines.

Nozzles are available in flanged and weld-in styles, and feature interior surfaces that are precision machined for cylindricality and a hydraulically-smooth surface. For weld-in flow nozzles, a code-recommended inspection port with a removable, contoured plug is available.

PTC6 Whole

ASME PTC 6 Flow Nozzle

+/- 0.25% Always Calibrated
Highest Accuracy / Repeatability

  • Line size: 4 to 28 inches
  • Head loss (permanent pressure loss) in % of Differential: 60% to 85% (18% to 25% with optional outlet diffuser cone), Beta Dependent
  • Recommended Application, THROAT Reynolds Number: Greater than 500,000
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Long Radius Nozzle Whole

Long Radius Flow Nozzle

+/- 2.00% Uncalibrated Uncertainty
Liquids and Gases, High-Velocity Flow

  • Line size: 2 to 24 inches
  • Head loss % of Differential: 30 to 85 percent, Beta Dependent
  • Recommended Pipe Reynolds number: Greater than 10,000 for basic accuracy
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ASME Throat Tap Nozzle

ASME PTC 19.5 Throat Tap Nozzle

+/- 0.70% Uncalibrated Uncertainty
High Accuracy

  • Line size: 4 to 28 inches
  • Head Loss (permanent pressure loss) in % of Differential: 60% to 85% (18% to 25% with optional outlet diffuser cone), Beta Dependent
  • Recommended Application, THROAT Reynolds Number: Greater than 500,000 for basic accuracy
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ISA-1932-Nozzle-Whole

ISA 1932 Flow Nozzle

+/- 0.80% to 1.20% Uncalibrated Uncertainty
Liquids and Gases, Lower uncertainty

  • Line size: 2 to 20 inches
  • Head Loss % of Differential: 30 to 85, Beta Dependent
  • Recommended Minimum Pipe Reynolds Number: Must be greater than 20,000 for basic accuracy
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ISA 1932 Venturi Nozzle Whole

Venturi Nozzle

+/- 1.21% to 1.74% Uncalibrated Uncertainty
Liquids and Gases, Lower Loss

  • Line size: 2.5 to 20 inches
  • Head loss (permanent pressure loss) in % of Differential: 5% to 20%
  • Recommended Pipe Reynolds Number: Greater than 150,000 for basic accuracy
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Flow Accessories

View All Flow Accessories

Accessories for differential pressure flow metering equipment and for liquid, gas and steam flow measurement.

IMG_0283

#1 VC Vent Cleaners

Clear & Maintain Tap Holes
Rod Out Pressure Sensing Ports

  • Removes obstructions and prevents blockages in pressure sensing lines
  • Common sizes: 1/4″, 1/2″, 3/4″
  • Fully customizable
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rosemount-3051s-coplanar-pressure-transmitter-1-5-valve

#2 TM Transmitters

Pressure, dP, Multi-Variable
Wide Range of Options

  • dP flow measurement or static pressure
  • Rosemount, ABB, Honeywell, Yokogawa and more brands available
  • In-house service and customization
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#3 RTD Sensor

Thermometer
To Measure Fluid Temperature

 

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#4 Thermowells

Thermometer
To Measure Fluid Temperature

  • Resistance or Thermocouple Temperature Measurement
  • ABB, Honeywell, Yokogawa and more brands available
  • Available with temperature sensing element and thermowell
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#5 FM Flow Master

Pre-Assembled Enclosure
Transmitters, Manifolds, Recorders

  • Complete flow metering system
  • Various accessory and mounting options available
  • Ease of installation
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#6 BV Butterfly Valves

Control Flow
On, Off, Regulate

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3in Cond Chamb-11

#7 CC Condensate Chambers

Separate Fluid and Instrument
Steam & Corrosive Fluids

  • Line size: 2 to 4 inches
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Flow Conditioner Laying Down

#8 FC Flow Conditioner

Stabilize Flow Profile
Tube Bundle, Plate Types

  • Ensure optimal accuracy
  • Reduce required upstream length
  • Various styles and designs are available
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Specialty Meters

View All Specialty Meters

Specialty Meters offered by Primary Flow Signal designed for open-conduit flow for water, sewage, sludge or any other non-pressurized material.

FVLF Whole

FV-LF Fabricated Venturi – Low Flow

+/- 0.50% Uncalibrated Uncertainty
Low Reynolds, Lower Loss

  • Line size: 3/8 to 12 inches
  • Head loss % of Differential: 20.0 to 40.0 percent
  • Recommended pipe Reynolds number: Greater than 6,000 for basic accuracy
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FE Whole

FE Fabricated Elbow Meter

+/- 2.00% Uncalibrated Uncertainty
Low Cost, Small Space Required

  • Line size: No limitations on line size
  • Recommended pipe Reynolds number: Greater than 50,000 for basic accuracy
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HN Whole

HN Halmi Nozzle

+/- 2.00% Uncalibrated Uncertainty
Low Cost, Open Channel Application

  • Line size: 6 to 48 inches
  • Head loss: Low
  • Service life: 25 years plus depending on materials
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