Transcript Pilots

Pilots & Accessories
Pilots & Accessories
• Signal Pilots
• Control Pilots
• Accessory Items
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Filters
Drip Pots
Instrument Regulators
Shutter Controls
Signal Pilots
• Enhance a pneumatic or mechanical input signal
• Provide
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Reversed Output
Multiplied Output
Volume Boosted Output
On / Off Snap Output
3 PS Snap Pilot
Reverses input signal
Converts varying signal
to ON / OFF signal.
Variable pressure
Supply
Output
Indirect
Direct or Indirect ?
Direct Mode
Indirect Mode
Rising Input
Rising Input
Rising Output
Falling Output
Direct
Indirect
3 PS Snap Pilot
Variable pressure
Supply
Supply pressure must
Not exceed 30 psi.
With increasing variable
pressure, output snaps
OFF at about 10 psi.
With decreasing variable
Pressure, output snaps
ON at 3 psi.
Output
Indirect
3 PS Snap Pilot
Converts variable (throttling)
output to ON / OFF output
3 PS Snap Pilot
Converts variable (throttling)
output to ON / OFF output.
Reverses output.
3 PG Throttle Pilot
Multiplies output pressure 4:1
Boosts output volume
Direct action
Throttle response
Variable pressure
Output
Supply
Direct
3 PG Throttle Pilot
4:1 increase in sensitivity
Pressure reducing
regulator
3 PG Throttle or Snap
Throttle
Snap
Variable pressure
Variable pressure
Supply
Output
Output
Supply
Direct
Indirect
3 PGM Manual Reset Pilot
Monitors output of a 3-way valve (pilot)
Blocks supply and vents output when a
preset limit is exceeded
3-way valve or pilot
Output
Supply
Direct
3 PGM Manual Reset Pilot
T 12 Thermostat
(3-way valve)
Output
Supply
3 PGB Bistable Pilot
Uses two temporary signals:
One signal to turn “ON” the pilot
One signal to turn “OFF” the pilot
Off signal
Supply
On signal
Output
3 PGB Bistable Pilot
Upstream pressure
gap control
Low
High
30 PGR Relay
20–30 psi Variable pressure
Low variable pressure
turns high pressure signal
ON / OFF
Output
0-300 psi Supply
Direct
30 PGR Relay
300 psi pressure closing valve
actuated by 30 psi signal
20 to 30 psi variable pressure
Up to 300 psi supply
Up to 300 psi output
Control Pilots
Sense a controlled pressure
and…
• Provide output signal for
condition monitor
• Provide output signal to a
remote valve for
• Back pressure control
• Pressure reduction
• Differential pressure
control
• Vacuum control
30 HPG
Pressure range: 5 to 300 psi
Controlled
Pressure
Output
Supply
Indirect
30 HPG PR
30 HPG Direct
Pressure range: 5 to 300 psi
Semi-snap acting
Does not throttle
Inverted pilot plug
and seats
Controlled
Pressure
Output
Direct
AHJ3
AHJ4
30 HPG DIR/125 lb Spring
30 HPG DIR/300 lb Spring
Supply
30 psi max.
30 HPG Direct
Pressure reducing regulator with
line break shut-down
Direct pilot set at low
line break pressure
Indirect PR pilot
30 PG PRDA
Pressure range: 5 to 300 psi
Throttle action
Controlled
Pressure
Output
Supply
30 psi max.
Direct
30 PG PRDA
Pressure reducing regulator
with fail open valve
75/150 PG
Pressure range:
75 PG: 50 to 750 psi
150 PG: 125 to 1500 psi
Throttle action
Single Adjusting Screw
Proportional Output
75 PG = 2:1
150 PG = 1:1
Simple Design
Low Initial Cost
Easy to Understand
Easy to Maintain
75/150 PG
Indirect
Direct
Indirect
Direct
75/150 PG
Pressure Reducing Regulator
Liquid Differential Pressure Pilot
Pressure range: 5 to 300 psi
Throttle action
Lower
Pressure
Higher
Pressure
Output
Supply
Indirect
Liquid Differential Pressure Pilot
Holds vessel gas pressure
above liquid discharge pressure
with fail open valve.
Gas out
Inlet
Liquid out
Pressure Differential Controller
1 to 260 inches H2O differential
1000, 2000, or 4000 psi working pressure
Indirect
100, 200, 400 PDC
Maintains constant differential
on orifice meter
Ounces Pressure Reducing Pilot
Three spring ranges:
½ ounce to 2 ½ psi
½ psi to 5 psi
1 psi to 20 psi
Controlled
Pressure
Output
Supply
Indirect
Direct Acting Ounces Pressure Reducing Pilot
Three spring ranges:
½ ounce to 2 ½ psi
½ psi to 5 psi
1 psi to 20 psi
Controlled
Pressure
Output
Supply
30 psi max.
Direct
Accessories
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Supply Gas Regulator
Sense Line Protector
Drip Pots
Air Motor
Supply Gas Regulator
Output pressure: 0 to 125 psi
Inlet pressure: 4000 psi max.
Reversible seat
Internally relieving
Low “droop”
Available in 316
stainless
Outlet
Inlet
Supply Gas Regulator
Supply Gas Regulator
Sense Line
Protector
Sense Line Protector
Protects pilots on high
pressure systems
Output pressure: 20 to 300 psi
Inlet pressure: 1000 psi max.
Inlet
Outlet
Drip Pots
DP 30
DP 200/400
FD 200
Air Motor
Operates shutters on air
cooled heat exchangers
5 ½ inch stroke
125 psi working pressure
Air Motor
Operates shutters on air
cooled heat exchangers