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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