Pilots & Accessories. Signal Pilots Control Pilots Accessory Items Filters Drip Pots Instrument...
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Transcript of Pilots & Accessories. Signal Pilots Control Pilots Accessory Items Filters Drip Pots Instrument...
Pilots & Accessories
Pilots & Accessories
• Signal Pilots
• Control Pilots
• Accessory Items• Filters• Drip Pots• Instrument Regulators• Shutter Controls
Signal Pilots
• Enhance a pneumatic or mechanical input signal• Provide
• Reversed Output• Multiplied Output• Volume Boosted Output• On / Off Snap Output
3 PS Snap Pilot
Supply
Variable pressure
Output
Reverses input signalConverts varying signalto ON / OFF signal.
Indirect
Direct or Indirect ?
Direct Mode Indirect Mode
Rising Input Rising Input
Rising Output Falling Output
Direct Indirect
3 PS Snap Pilot
Supply
Supply pressure mustNot exceed 30 psi.
Variable pressure
Output
With increasing variablepressure, output snapsOFF at about 10 psi.With decreasing variablePressure, output snapsON at 3 psi.
Indirect
Converts variable (throttling)output to ON / OFF output
3 PS Snap Pilot
Converts variable (throttling)output to ON / OFF output.
Reverses output.
3 PS Snap Pilot
3 PG Throttle Pilot
Multiplies output pressure 4:1Boosts output volumeDirect actionThrottle response
Supply
Variable pressure
Output
Direct
3 PG Throttle Pilot
Pressure reducingregulator
4:1 increase in sensitivity
3 PG Throttle or Snap
Direct Indirect
Variable pressure
Output
Variable pressure
Output
Supply
Supply
Throttle Snap
3 PGM Manual Reset Pilot
Monitors output of a 3-way valve (pilot) Blocks supply and vents output when apreset limit is exceeded
Supply
Output
3-way valve or pilot
Direct
3 PGM Manual Reset Pilot
Supply
Output
T 12 Thermostat(3-way valve)
3 PGB Bistable Pilot
Uses two temporary signals: One signal to turn “ON” the pilot One signal to turn “OFF” the pilot
Off signal
Output
Supply On signal
3 PGB Bistable Pilot
Low High
Upstream pressuregap control
30 PGR Relay
Direct
20–30 psi Variable pressure
Output
0-300 psi Supply
Low variable pressureturns high pressure signalON / OFF
30 PGR Relay
300 psi pressure closing valveactuated by 30 psi signal
Up to 300 psi supply Up to 300 psi output
20 to 30 psi variable pressure
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
Indirect
Output
Supply
ControlledPressure
Pressure range: 5 to 300 psi
30 HPG PR
30 HPG Direct
Direct
ControlledPressure
Output
Supply30 psi max.
Inverted pilot plugand seats
Semi-snap actingDoes not throttle
Pressure range: 5 to 300 psi
AHJ3 30 HPG DIR/125 lb SpringAHJ4 30 HPG DIR/300 lb Spring
30 HPG Direct
Pressure reducing regulator withline break shut-down
Indirect PR pilot
Direct pilot set at lowline break pressure
30 PG PRDA
Direct
ControlledPressure
Output
Supply30 psi max.
Throttle actionPressure range: 5 to 300 psi
30 PG PRDA
Pressure reducing regulator with fail open valve
75/150 PG
Throttle action
Pressure range: 75 PG: 50 to 750 psi 150 PG: 125 to 1500 psi
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
DirectIndirect
75/150 PG
Pressure Reducing Regulator
Liquid Differential Pressure Pilot
Indirect
Throttle action
Pressure range: 5 to 300 psi
HigherPressure
Output
Supply
LowerPressure
Liquid Differential Pressure Pilot
Holds vessel gas pressure above liquid discharge pressure with fail open valve.
Inlet
Gas out
Liquid out
Pressure Differential Controller
Indirect
1 to 260 inches H2O differential1000, 2000, or 4000 psi working pressure
100, 200, 400 PDC
Maintains constant differentialon orifice meter
Ounces Pressure Reducing Pilot
Indirect
Three spring ranges: ½ ounce to 2 ½ psi ½ psi to 5 psi 1 psi to 20 psi
ControlledPressureOutput
Supply
Direct Acting Ounces Pressure Reducing Pilot
Direct
Three spring ranges: ½ ounce to 2 ½ psi ½ psi to 5 psi 1 psi to 20 psi
Output Supply30 psi max.
ControlledPressure
Accessories
• Supply Gas Regulator• Sense Line Protector• Drip Pots• Air Motor
Supply Gas Regulator
Output pressure: 0 to 125 psiInlet pressure: 4000 psi max.
InletOutlet
Reversible seat
Internally relieving
Low “droop”
Available in 316 stainless
Supply Gas Regulator
Supply Gas Regulator
Sense LineProtector
Sense Line Protector
Protects pilots on highpressure systems
Output pressure: 20 to 300 psiInlet 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 stroke125 psi working pressure
Air Motor
Operates shutters on air cooled heat exchangers