GO Switch Sales Training
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Transcript GO Switch Sales Training
GO Switch
Leverless Limit Switches
GO Switch
• Why GO Switch is special
• Competition overview
• GO Switch products
Square
Round
Power
• Where to sell them
• Trouble shooting
What is so special about a
GO Switch?
• The broadest range of products for valves
• Virtually indestructible
• Extremes others can’t handle:
Temperature: -40oF to 400oF
Underwater: depths to 21,000 feet
Pressure: up to 10,000 psi
Hostiles: explosive, caustics, corrosives
What is so special about a
GO Switch?
• Total confidence in performance
• No one else in the world makes a product
like a GO Switch
• Copied by some (in enclosure style only)
• Only competition is other technologies:
Mechanical, Solid State, or Reed
Competition:
Technologies
• Mechanical: Lever arm linked to the
switch mechanism
• Solid State: Electrically created
magnetic field measures change in
magnetic field to trip switch
• Reed: Glass encapsulated switch
mechanism tripped by a magnetic target
• GO is a hybrid technology that combines
the advantages of each of the above with
none of their drawbacks
Competition:
Mechanical Limit Switches
• Lever arms bend, break and wear
GO is proximity - no contact,wear,torque
• Multiple moving parts to fail:
Lever arms, rollers, springs, gears
GO has only one moving part - no metal
to metal contact making it move
• Gasketed hole invites moisture and dust
GO is completely potted and sealed
Competition:
Mechanical Limit Switches
• Moisture problems are common:
Contact chamber not potted
Gasket dries, cracks, and fails
GO is completely potted and sealed
• Repeatability is poor - lever stroke varies
GO is repeatable to 0.002” for life
• Maintenance headache
GO is maintenance free
Competition:
Inductive Proximity Sensors
• Solid state - consumes power to operate
GO is dry contact - consumes no power
• Two piece construction is fragile
GO is one piece stainless or brass
• Must stock 4 models for AC, DC, NO, NC
GO - one model does it all
• Not explosion proof
GO is Class I Div I all groups
Competition:
Inductive Proximity Sensors
• IS barrier brand sensitive
GO is simple device - use any barrier
GO hermetic seal is Non-Incendive
• Temperature sensitive - sensing varies
GO to 400oF with stable sensing
• Many wiring precautions
GO handles high loads - no voltage drop
or current leakage - series or parallel
Competition:
Reed Switches
• Switch mechanism often unreliable
GO is proven to 100s of millions of cycles
• Susceptible to vibration and bounce
GO contact pressure is much greater
• Glass tube hermetic seal is fragile
GO herm seal is virtually unbreakable
• Require magnet to operate
GO needs only ferrous metal
GO Switch
Product Line
• Leverless Limit Switches
Square - 10, 20, 35, 80 Series
Round - 70 Series
Stroke-to-GO
• Power Products
Defender - turbine trip valve monitor
NuProx - nuclear qualified switches
GO Switch
Common Features
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Standard temperature: -40oF to 221oF
Repeatability: 0.002”
Response time: 8 ms
Dry contact:
Consume no power to operate
No voltage drop or leakage current
Can wire AC or DC, NO or NC
• Simple device - Intrinsically Safe
GO Switch
Common Features
• Permanent magnets: -1% every 100 years
• Options galore:
Stainless Steel, Epoxy, Exotic
SPDT, DPDT, Quick Disconnect
Explosion Proof, Hi Temp, SubSea
• Target Magnets increase sensing range
• Date coded for traceability
GO Switch
Common Features
• Heavy duty dry contacts
Excellent for both high and low loads
Vibration resistant, high contact pressure
Self-cleaning with wiping action
• Contact ratings are for resistive loads
Inductive loads app 1/2 published ratings
GO Switch
Square - 10/20 Series
• The original Leverless Limit Switch
Invented in 1958 by CR Marcum
Workhorse of the industry
• Same operating principle today
Simple but very clever
Materials upgraded through the years
Armature
10/20 Series
How it Works
Sensing
Area
Target
Activated
Unactivated
GO Switch
Square - 10/20 Series
• 11-12110-00
• Two magnet design
Magnetic bias with see-saw armature
• 3/8” Side, 9/16” Extend (10), 3 3/16” Max
• SPDT, DMDB, Latching
10A/120Vac, 3A/24Vdc
Silver cadmium oxide, gold flashed
• Hi Temp to 350oF
• UL, CSA, FM, SAA, MSHA
• 5 conduit positions
Armature
Sensing
Area
Unactivated
Target
Activated
80 Series
How it Works
GO Switch
Square - 80 Series
• One magnet design
Magnetic bias with see-saw armature
• 1/4” End Sensing, 3 1/2” Max
• SPDT, DPDT
10 amp/120Vac, 3 amp/24Vdc
Silver cadmium oxide, gold flashed
• UL, CSA, FM, SAA
• 2 conduit positions
• 81-20516-A2
GO Switch
Square - 35 Series
• One magnet design
Magnetic bias with see-saw armature
• Switchpak top sensor choice
• SPDT
4 amp/120Vac, 3 amp/24Vdc
Industry best
• Hermetic seal
• 35-113311-A1
Unactivated
Sensing
Area
70 Series
How it Works
Bias
Magnet
Center
Primary Magnet
Magnet
Activated
Target
GO Switch
Round - 70 Series
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The global choice on linear control valves
20 years of industry success
Several look like it, none perform like it
Unmatched durability and reliability
73-13528-A2 General Purpose
73-13526-A2 Class I Div II
73-13523-A2 Class I Div I
GO Switch
Round - 70 Series
• Three magnet design
Magnetic bias creates magnetic spring
• .100” End Sensing, .440” Max
• SPDT, DPDT
4A/120VAC, 3A/24VDC - ind. best
Silver palladium, sawtooth configuration
• Hi Temp to 400oF
• UL, CSA, FM, CENELEC, SAA
• 3/8”, 5/8”, 3/4” standard sizes
GO Switch
Round - 70 Series
• Single piece construction
Stainless steel barstock
Prevents moisture intrusion
• Can be surrounded by ferrous metal and
performance is unaffected
• More expensive than solid state - if they
are working well, walk away - if not
working, we’re in
Stroke-to-GO
How it Works
Center
Magnet
Bias
Magnet
Primary
Magnet
Unactivated
Activated
Cylinder Rod
Cushion
GO Switch
Stroke-to-GO
• Cylinder Position Sensor
• Solid Stainless Steel
Competition has plastic sensing face
• 3,000 psi working and 12,000 psi burst
4:1 UL safety ratio for cylinder apps.
• Bi-color LED indicates position
• 360o adjustable head
GO Switch
Power Products - Defender
• Turbine Trip Valve Position Monitor
• Westinghouse turbines 100+ mW
Drop-in replacement
• One Defender per valve
8-18 trip valves per turbine
Throttle
Governor
Reheat
Reheat Stop
Before
After
GO Switch
Power Products - NuProx
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Nuclear Qualified Proximity Switch
CANDU Qualified for containment
1/3 the size of Namco
Eliminates torque to operate
SPDT
1 amp @ 48Vdc
GO Switch
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Power Generation
Refining
Oil & Gas
Chemical
Pulp & Paper
Food & Beverage
Pharmaceutical
Water & Wastewater
Off Shore
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Automotive
Tire & Rubber
Mining
Railroad
Cement
Steel & Aluminum
Glass
Transportation
GO Switch
Explosive Areas
Mechanical: often increases size of switch
Solid State: not available
Reed: some are available
GO Switch leads with global approvals
UL, CSA, FM, CENELEC, SAA,MSHA
Class I Div I all groups
Zone 0, Zone 1, Zone 2
GO Switch
Hostile Conditions
Caustic chemicals
Corrosive liquids - salt water
Coal, coke, cement, or other dust
High pressure washdown, steam leaks
GO Switch is the choice
Stainless steel housings
Epoxy/Exotic coatings
GO Switch
Temperature Extremes
Mechanical: -20oF to 250oF
Solid State: 0oF to 158oF
Reed Switch: -40oF to 220oF
GO Switch: -40oF to 400oF
Cold: NASA -200oF, Syncrude -122oF
Heat: only GO can go above 250oF
GO Switch
Underwater Applications
Mechanical: not a chance
Solid State: not realistically
Reed Switch: rely on a reed underwater?
GO Switch is often the only real solution
Depths to 21,277 feet sea water
Valves, locks, sleuth gates, military
SubSea connector on 10/20, 70, 80
GO Switch
Unusual Applications
Short stroke globe valves
Valve stem b/t QT valve and actuator
Safety showers
Security areas
Wherever reliability is critical
GO Switch has so many models that there
is always a solution
GO Switch
Trouble Shooting
Sensing
• Target Size - is target at least as big as the
Sensing Area of the switch?
• Target Mass - is target at least 1/4” thick
• Target Location - is target well within
Sensing Range (1/2 the range)?
• Target Material - is target ferrous metal
or magnet (proper polarity)?
• Reset - hysteresis - does target move
well outside sensing range?
GO Switch
Trouble Shooting
Mounting
Is the mounting bracket non-ferrous?
If not, were instructions followed?
Is a conduit drip loop installed to prevent
moisture?
Is the conduit supported adequately?