Transcript GO Switch Training Agenda - Air

Leverless
Limit
Switches
Reliability & Durability
in the most demanding
plant conditions
GO Switch
Training Agenda
• Why GO Switch is special
• Competition overview
• GO Switch products
– Square
– Round
– Power
• Where to sell them
Our experience
• Factory Automation
–
–
–
–
–
–
Automotive
Cement
Diecasting
Steel
Tire & Rubber
Tool & Die
• Process Automation
– Biotech
– Chemical
– Food & Beverage
– Hydrocarbon
– Mining
– Oil & Gas
– Petrochemical
– Power
– Pulp & Paper
– Water/Wastewater
GO Switch product line
A variety of shapes, sizes, and sensing ranges to fit most
applications
• Square
10 Series
Long Range
20 Series
Side Sensing
30 Series
End Sensing
Round
71 & 72
3/8” dia.
73 & 74
5/8” dia.
75, 76 & 77
Long Threads
35 Series
Valve Position
Sensor
7G & 7I
DPDT
80 Series
DPDT
7L & LPS
BriteLite LEDs
GO Switch product line
A variety of shapes, sizes, and sensing ranges to fit most
applications
Specialty
7A
Pneumatic
Hi-Temp to
3500F/4000F
SubSea
N7 & P7
Submersible Nuclear Qualified
to 20,000 ft.
Defender
Turbine Valve
Monitoring Systems
Cylinder Position Sensors
7D-7F Stroke-to-GO
Probe lengths to 2.062” standard
Custom lengths to 5”
3,000psi pressure rating
3600 adjustable
GO Switch
Common Features
•
•
•
•
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
Highest volt/current rating on the market for prox
switch
• 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 trace ability
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
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:
Limit Switch
• A Limit Switch is an electrical mechanical device that
that provides an electrical signal through a set of
contacts.
– When the object to be sensed comes in contact with an
actuator, this mechanical motion closes (makes) or opens
(breaks) a set of contacts
• Limit Switches are often applied because
–
–
–
–
They do not require external power
Have a very wide voltage and current range
Do not have leakage current
Have a higher temperature range than solid state sensors
• Disadvantages
– Require contact with object to be sensed
– Limited sensing distance
– Mechanical wear
Competition:
Mechanical Limit Switches
• Lever arms bend, break and wear
– Some require up to 32 in lbs to operate
– 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
• Hole(s) with gaskets invite 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:
Proximity Switches
• Traditional “prox” switches are solid state
devices. They use inductive sensing technology
to detect the presence of absence of a metallic
target
• Many shapes and sizes
– Square, rectangular, cylindrical, puck, etc
• Can be very small
• Works better in tough environments as compared
to Photoelectrics and Limit Switches
• Low cost
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
• A Reed Switch consists of two
magnetic contacts when
approached by a target magnet,
attract each other and close a
circuit.
• Contacts are contained in a gas
filled glass tube
• Can be packaged in many
different sized enclosures
• Designed to switch lower currents
and can not handle high current
loads
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
Square - 10/20 Series
• The original Leverless Limit Switch
– Invented in 1950’s by CR Marcum
– Workhorse of the industry
• Same operating principle today
– Simple but very clever
– Materials upgraded through the years
10/20 Series - How it Works
Operated
Unoperated
On the sensing side of the switch, one
magnet is positioned closer to the armature,
creating a dominant magnetic flux field which
draws the armature down to its unoperated
position, closing a contact circuit.
When a ferrous target enters the sensing area of
the switch, it diverts flux lines from the armature to
create a magnetic dominance on the opposite
side. As a result, the armature snaps to its
operated position, closing the other contact circuit.
When the target is removed the armature snaps
back to its original, unoperated position.
A look inside…
1. Seesaw armature
provides snap action
and solid contact
pressure, eliminating
‘contact teasing’ and
‘contact chatter’ in high
vibration applications.
2. Versatile gold flashed
contacts are suitable for
high and low electrical
loads, and can be wired
AC or DC, N/O or N/C.
3. Sealed contact
chamber prevents
moisture or dust from
reaching the contacts.
4. Side sensing range
can be extended to
nearly 4” using external
target magnets.
5. Permanent magnets
never lose their
strength, even when
mounted on ferrous
metal.
6. Rugged brass or
stainless steel housing
withstands physical
abuse, moisture, and
corrosives.
7. Multiple wiring
options:
-Terminal Block
-Lead Wires
-Cable-Quick
Disconnects
8. Potting fills the entire
switch cavity, forming a
barrier against moisture.
9. Conduit hub can be
located in any of 5
positions for versatile
installation.
10. Consumes no power
to operate and has no
current leakage or
voltage drop.
GO Switch
Square - 10/20 Series
• 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 (10)
• UL, CSA, FM, SAA, MSHA
• 5 conduit positions
80 Series - How it Works
Unoperated
The armature is
positioned off-center
of the magnet,
creating a dominant
magnetic flux field
on the sensing end
of the switch which
draws the armature
down to its
unoperated position,
closing a contact
circuit.
Operated
When a ferrous target
enters the sensing
area of the switch, it
diverts flux lines from
the armature to
create a magnetic
dominance on the
opposite side. As a
result, the armature
snaps to its operated
position, closing the
other contact circuit.
When the target is
removed the
armature snaps back
to its original,
unoperated position.
A look inside…
1. Seesaw armature provides
snap action and solid contact
pressure, eliminating ‘contact
teasing’ and ‘contact chatter’ in
high vibration applications.
2. End sensing range can be
extended to nearly 4" using
external target magnets.
3. Permanent magnets never
lose their strength, even when
mounted on ferrous metal.
4. Sealed contact chamber
prevents moisture or dust from
reaching the contacts.
5. Potting fills the entire switch
cavity, forming a barrier against
moisture.
6. Versatile gold flashed contacts
are suitable for high and low
electrical loads, and can be wired
AC or DC, N/O or N/C.
7. Brass, stainless
steel or copper
housing withstands
physical abuse,
moisture, and
corrosives.
8. Conduit outlet on
bottom of housing for
versatile installation.
9. Multiple wiring
options:
•Terminal Block
•Lead Wires
•Cable
•Quick Disconnect
10. Consumes no
power to operate and
has no current
leakage or voltage
drop.
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 position
GO Switch
Square - 35 Series
• One magnet design
– Magnetic bias with see-saw armature
• SPDT
– 4 amp/120Vac, 3 amp/24Vdc
• Hermetic seal
70 Series - How it Works
Unoperated
The center magnet
simultaneously
attracts the primary
magnet and repels
the bias magnet,
pushing the
connecting rod
backward. As a
result, the common
contact rests in its
unoperated position,
closing a contact
circuit.
Operated
When a ferrous
target enters the
sensing area of the
switch, it attracts the
primary magnet,
which pulls the
connecting rod
forward. As a result,
the common contact
snaps to its operated
position, closing the
other contact circuit.
When the target is
removed the
common contact
snaps back to its
original, unoperated
position.
A look inside…
1. Permanent magnets never
lose their strength, even when
threaded into ferrous metal.
7. Sealed contact chamber
prevents moisture or dust
from reaching the contacts.
2. End sensing range can be
extended using external target
magnets.
8. Potting fills the entire
switch cavity, forming a
barrier against moisture.
3. Sensing face is stainless
steel rather than plastic,
preventing damage due to
incidental physical contact.
9. One-piece stainless steel
construction makes this the
most durable proximity
sensor in the world.
4. Three magnets provide snap
action and solid contact
pressure, eliminating ‘contact
teasing’ and ‘contact chatter’ in
high vibration applications.
10. Consumes no power to
operate and has no current
leakage or voltage drop.
5. English or metric threads
available.
6. Unique sawtooth contacts are
suitable for high and low
electrical loads, and can be
wired AC or DC, N/O or N/C.
11. Multiple wiring
options:
• Lead Wires
• Cable
• Quick Disconnect
GO Switch
Round - 70 Series
•
•
•
•
•
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, 0.350” Max
• SPDT, DPDT
– 4A/120VAC, 3A/24VDC - Industry Best
– Silver palladium contacts
– Sawtooth configuration
• Hi Temp to 400oF
• UL, CSA, FM, CENELEC, SAA
• 3/8”, 5/8”, 3/4” diameter std sizes
GO Switch
Round - 70 Series
• Single piece construction
– Stainless steel barstock
– Prevents moisture intrusion
• Hermetic seals and DPDT contacts
available on 7G,7H & 7I
• More expensive than solid state - if
they are working well, walk away - if
not working, we’re in
Cylinder Position Sensor
Stroke-To-GO
• Cylinder Position Sensor
• Solid Stainless Steel
– Competition has plastic or ceramic
sensing face
• 3,000 psi working and 12,000 psi burst
4:1 Safety Factor
• Bi-color LED indicates position
• 360o adjustable head
Stroke-To-GO - How it Works
A look inside…
1. Multiple wiring options:
2. Bi-Color red and green LED
position indicator increases safety
and awareness for plant personnel.
7. All stainless steel construction
makes this the most durable
cylinder position sensor in the
world.
-
3. 360° rotatable head makes
installation simple and easy.
4. Potting fills the entire switch cavity,
forming a barrier against moisture.
5. Unique sawtooth contacts are
suitable for high and low electrical
loads, and can be wired AC or DC,
N/O or N/C.
6. Three magnet design provides
snap action and solid contact
pressure, eliminating ‘contact
teasing’ and ‘contact chatter’ in high
vibration applications.
8. Probe lengths ranging from 1" to
5" ensure a proper fit to virtually any
cylinder.
9. O-Ring seals in pressures up to
3,000 PSI
10. Sensing face is stainless steel
rather than plastic, and is therefore
more suitable for high pressure
hydraulic cylinder applications.
11. Permanent magnets never lose
their strength, even when mounted on
ferrous metal.
GO Switch
Applications
• Explosive Areas
– Mechanical: often increases size of switch
– Solid State: not 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
ATEX Certified (Selected 70 Series Models)
GO Switch
Applications
• Hostile Conditions
–
–
–
–
Caustic chemicals
Corrosive liquids - salt water
Coal, coke, cement, or other dust
High pressure wash down, steam leaks
• GO Switch is the choice:
– Stainless steel housings
– Epoxy/Exotic coatings
GO Switch
Applications
• 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
Applications
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
Applications
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
Power Products - Defender
• Turbine Trip Valve Position Monitor
• Westinghouse turbines 100+ Mega Watts
– Drop-in replacement
• One Defender per valve
–
–
–
–
–
–
8-18 trip valves per turbine
Throttle
Governor
Reheat
Reheat Stop
Intercept
Before
After
GO Switch
Where to Sell Them
•
•
•
•
•
•
•
•
•
Power Generation
Refining
Oil & Gas
Chemical
Pulp & Paper
Food & Beverage
Pharmaceutical
Water & Wastewater
Off Shore
•
•
•
•
•
•
•
•
Automotive
Tire & Rubber
Mining
Railroad
Cement
Steel & Aluminum
Glass
Transportation
GO Switch
Where to Sell Them
Hot
Wet
Dirty
Cold
Explosive
Corrosive
Abusive
www.goswitch.com
GO Switch FastTrack Delivery
Standard items most likely to be in stock
Leverless
Limit
Switches
Reliability & Durability
in the most demanding
plant conditions