Transcript Flow Products - 400 Series

Hastings Product Training
Flow Products Overview
March 2010
Agenda
•
•
•
•
March 2010
Thermal mass flow basics
Hastings flow product overview
Product selection
Typical applications
2
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
3
Mass Flow vs. Volumetric Flow
• Unlike liquids, gases do not have constant volume
• Volumetric flow changes with:
Temperature
March 2010
Pressure
4
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
5
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 C
– Other temperatures are possible, but must be
referenced on the order (and on quote)
– Pressure reference is always 760 Torr (1 ATM)
O
March 2010
6
Mass Flow vs. Volumetric Flow
• With STP values, you can convert from mass flow
to volumetric flow:
P1 T 2
Flow 1×
×
= Flow 2
P2 T1
O
O
(for 0 C vs. 20 C)
• Note: Temperature and Pressure are absolute
– T (Kelvin) = C + 273.15
– PSIA = PSIG + 14.696
O
• Example?
March 2010
7
Typical Mass Flow Meter
Sensor
Base
Shunt
March 2010
8
Typical Mass Flow Sensor
Constant temperature heater
This design is used in the 200 Series products.
March 2010
9
Constant DT Sensor
300 Series Sensor
March 2010
10
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
11
2-Stage Valve
Bleed
Flow Qb
Main Flow Qm
Pb
Pilot
Flow Qp
Pu
Pd
*Larger flows require a 2-stage valve
*Used on HFC-203/303/307
March 2010
12
Questions?
March 2010
13
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
14
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
15
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
16
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** ± 0.75% for FS below 10 SLM
• Fast response time
• Metal seals on HFM-300 & 305
– Kalrez valve seat on HFC-302
• Foldover protection
• Lower dP than 200 Series
March 2010
17
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
18
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% FS
Polynomial: ± (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
19
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
20
NALL Series
• Ranges
– Up to 15,000 SLM N2
• 316SS and Monel
O
O
• 100 C std. / 200 C opt.
• Hermetically sealed
transducer option
• Low pressure drop
version available upon
request
March 2010
21
Product Selection
• Select flow product based on
–
–
–
–
–
–
–
Range
Sales tools available
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)
March 2010
22
Typical Applications
• Leak testing
– Castings, fabrications, filters, aircraft components,
valves, building supplies, automotive components
March 2010
23
Typical Applications
• Flow performance testing
– Respirators, aircraft components, air tools,
flowmeters, gas appliances, fuel cell
March 2010
24
Typical Applications
•
•
•
•
Gas blending
Gas samplers / analyzers
Flame spray
Any application where gas
measurement is critical
March 2010
25
Questions?
March 2010
26
Sales Support Tools
•
•
•
•
Sizing Sheets
Material Compatibility
Gas Conversion Factor (GCF)
Pressure Drop
March 2010
27