March 2010

Hastings Product Training

Flow Products Overview

March 2010 2

Agenda

• Thermal mass flow basics

• Hastings flow product overview

• Product selection

• Typical applications

March 2010 3

Glossary of Terms

• Thermal mass flowmeter– Measures the mass flowrate of a fluid (liquid or gas)

by measuring thermal energy transfer– Hastings only manufactures gas flowmeters

• Flow controller– Combines a thermal mass flowmeter with a PID loop

and flow control valve

March 2010 4

Mass Flow vs. Volumetric Flow

• Unlike liquids, gases do not have constant volume

• Volumetric flow changes with:

Temperature Pressure

March 2010 5

Mass Flow vs. Volumetric Flow

• Mass flow is independent of temperature and pressure changes.

• Measure the mass of the gas or number of molecules of gas

• True mass units can be expressed as:– lb/hr, gm/sec, etc.

• Can also be expressed as a standard volumetric flow unit:– SCCM, SLM, SCFM, etc.

March 2010 6

Mass Flow vs. Volumetric Flow

• Standard volumetric flow units look like volumetric flow units, but they are mass flow units.

• Standard units are referenced to STP– Standard Temperature and Pressure

• STP must be defined– Hastings standard temperature = 0

O

C– Other temperatures are possible, but must be

referenced on the order (and on quote)– Pressure reference is always 760 Torr (1 ATM)

March 2010 7

Mass Flow vs. Volumetric Flow

• With STP values, you can convert from mass flow to volumetric flow:

• Note: Temperature and Pressure are absolute– T (Kelvin) =

O

C + 273.15– PSIA = PSIG + 14.696

• Example?

(for 0O

C vs. 20O

C)

2Flow=1T2T

×2P1P

×1Flow

March 2010 8

Typical Mass Flow Meter

Base

Shunt

Sensor

March 2010 9

Typical Mass Flow Sensor

This design is used in the 200 Series products.

Constant temperature heater

March 2010 10

Constant T Sensor

300 Series Sensor

March 2010 11

Flow Control

• Standard valves are normally closed (spring)

• Use PID loop to adjust valve voltage required to open the valve

• Orifice is a fixed variable in flow control equation

• THI requests Upstream and Downstream pressures to size orifice for proper flow control

March 2010 12

2-Stage Valve

Pilot Flow Qp

Pd

Bleed Flow Qb

Pu

Pb

Main Flow Qm

*Larger flows require a 2-stage valve*Used on HFC-203/303/307

March 2010 13

Questions?

March 2010 14

Flow Product Overview

• Ranges from: – 0 - 5 SCCM to– 0 - 15,000 SLM

• Analog and Digital models• Extensive product offering

to cover a wide range of applications

March 2010 15

200 Series

• Ranges– HFM-200/HFC-202

• Min: 0 – 10 SCCM N2• Max: 0 – 25 SLM N2

– HFM-201/HFC-203• Min: 0 – 25 SLM N2• Max: 0 – 500 SLM N2

• Simple / reliable design• Accuracy: ± 1% FS• Average response time,

but very stable

March 2010 16

HFM-200 with LFE

• LFE: Laminar Flow Element• Ranges

– Up to 15,000 SLM N2

• Uses HFM-200• Accuracy: ± 1% FS• Low pressure drop

March 2010 17

300 Series

• Ranges– HFM-300/HFC-302

• Min: 0 – 5 SCCM N2• Max: 0 – 25 SLM N2

– HFM-301/HFC-303• Up to 1,000 SLM N2

– HFM-305/HFC-307• Up to 2,500 SLM N2

– HFM-306 (Custom Product)• Up to 8,000 SLM N2 @ ± 3% FS

• Accuracy: ± 1% FS*• Fast response time• Metal seals on HFM-300 & 305

– Kalrez valve seat on HFC-302

• Foldover protection• Lower dP than 200 Series

* ± 0.75% for FS below 10 SLM

March 2010 18

Digital 300 Series

• Ranges– HFM-D-300/HFC-D-302

• Up to 25 SLM N2

– HFM-D-301/HFC-D-303• Up to 1,000 SLM N2

– HFM-D-305/HFC-D-307• Up to 2,500 SLM N2

• Based on 300 Series• Accuracy:

± (0.2% FS + 0.5% Rdg)

• RS232 / RS485• ± 12, ± 15, 24 vdc• Many built-in features

– Totalizer, multiple gas calibration

March 2010 19

400-I Series

• Ranges– HFM-I-401

• Up to 350 SLM N2– HFM-I-405

• Up to 2,500 SLM N2

• IP65 Enclosure / Hazardous Location Approval

• Accuracy:Standard: ± 1% FSPolynomial: ± (0.2% FS + 0.5% Rdg)

• RS232 (std), RS485, or EtherNet• Analog output (always present)

– 4-20 mA (std)– 0-5 vdc, 0-10 vdc, 0-20 mA, 1-5 vdc

• 24 vdc or ± 15 vdc power• Many built-in features

– Totalizer, multiple gas calibration

March 2010 20

Power Pods / Power Supplies

• THPS-400– Up to Qty(4) HFM or HFC– RS232/RS485– Ratio control– Totalizer

• THPS-100– One HFM or HFC– RS232– 2 high / 2 low setpoints

• Model 40– Up to Qty(4) HFM

March 2010 21

NALL Series

• Ranges– Up to 15,000 SLM N2

• 316SS and Monel• 100

O

C std. / 200O

C opt.• Hermetically sealed

transducer option• Low pressure drop

version available upon request

March 2010 22

Product Selection

• Select flow product based on– Range– Material compatibility– Temperature / Pressure compatibility– Response time– Pressure drop considerations– Features required– Environmental considerations

• Do not oversell!• Specify (on quote & order): range, gas, and STP

reference (and upstream/downstream pressures for flow controllers)

Sales tools available

March 2010 23

Typical Applications

• Leak testing– Castings, fabrications, filters, aircraft components,

valves, building supplies, automotive components

March 2010 24

Typical Applications

• Flow performance testing– Respirators, aircraft components, air tools,

flowmeters, gas appliances, fuel cell

March 2010 25

Typical Applications

• Gas blending

• Gas samplers / analyzers

• Flame spray

• Any application where gas measurement is critical

March 2010 26

Questions?

March 2010 27

Sales Support Tools

• Sizing Sheets

• Material Compatibility

• Gas Conversion Factor (GCF)

• Pressure Drop