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Pressure Sensors & Level Switches

Model AN70 exhaust port indicator
Model AP40M manifold assembly pneumatic pressure switch
Model AP40 pneumatic pressure switch
Model AR1F ESD/Fuse loop control relay
Model AR10 manual reset pneumatic relay w/detent
Model AR11A field mount auto reset pneumatic relay
Model AR11M field mount manual reset pneumatic relay

Model AN70 exhaust port indicator

GENERAL DESCRIPTION:

The Array Model AN70 Exhaust Port Indicator is specifically designed for use on wellhead and production pneumatic safety systems. When no pressure is flowing thru the exhaust port of a valve or sensor, the “RED” indicator stem remains inside the indicator body. The Exhaust Port Indicator operates when the valve or sensor vents pressure. This pressure extends the “RED” indicator stem outward and at the end of its movement allows the exhaust pressure to escape from four slots in the face of the body. The stem stays extended until manually reset and allows all pressure to freely exhaust to the atmosphere. The small size and simplicity of operation makes the Model AN70 Exhaust Port Indicator an economical device for providing “First Out” alarm indication.

APPLICATIONS:

Any pneumatically powered “LOOP” safety systems that incorporate more than one sensor such as a pressure pilot (PSH/PSL) or level switch (LSH/LSL) can use the Model AN70 to indicate which sensor has tripped. When the safety system is configured to remove all instrument pressure after an alarm has occurred, only the Model AN70 Exhaust Port Indicator on the first sensor that tripped will indicate.

FEATURES & BENEFITS:

Constructed of field proven materials that will provide years of trouble free service
Will not effect operation of valve or sensor it is installed on
Not affected by vibration and will “stay put” after tripping
Can be mounted in any position (horizontal, vertically up or down)
“RED” Indicator Stem is easily seen.


Model AP40M manifold assembly pneumatic pressure switch

GENERAL DESCRIPTION:

The Array Model AP40 Manifold Assembly incorporates two Model AP40 Pneumatic Pressure Switches mounted on a rugged ported base with instrument tubing jumper installed between the low and high switches. This jumper allows the assembly to sense high and low set pressures using one process connection. An additional port on the manifold may be used as a test connection or gauge port.

APPLICATIONS:

This pressure switch manifold assembly may be used for any process application requiring a low and high pressure switch signal for process control functions. The most common uses are on flowlines, pipelines and pressurized production vessels to control valves, pumps, actuators and/or initiate alarms.

FEATURES & BENEFITS:

All 316 St. Steel components
Overall size of assembly allows installation in "tight" areas around piping and other process equipment

 

 

 

Model AP40 pneumatic pressure switch

GENERAL DESCRIPTION:

The Array Model AP40 Pneumatic Pressure Switch was specifically designed for the rigorous oilfield environment. It functions as a 3-way "block and bleed" valve that can be configured to respond to increasing or decreasing process pressures. The standard unit utilizes a patented system which provides three piston diameters that are selected by simply changing the orientation of one part. When used in combination with one of three available spring sizes, the Model AP40 offers sensing ranges from 10 to 10,000 psi. without the purchase of additional bases or pistons.

APPLICATIONS:

This pressure switch may be used for any process application requiring a pneumatic instrument signal for process control. The most common uses are on flowlines, pipelines and pressurized production vessels to control valves, pumps, actuators and/or initiate alarms.

FEATURES & BENEFITS:

All sensing seals incorporate PTFE back-up rings permitting low pressure sensing ranges to operate up to 10,000 psi wihout seal damage. Compact size saves space in panel use
Patented piston/base design has three sensing diameters built-in
Piston and base materials meet NACE MR01-75
Unique instrument valve construction allows for minimum deadband and maximum seal life.
A 1/4" NPT (F) sensor base connection reduces fitting costs for panel mounted applications
Large flowpaths are provided in the sensing base and piston to insure quick response to pressure changes
Spring may be removed without bleeding off instrumentation or process pressures.

 

 

Model AR1F ESD/Fuse loop control relay

GENERAL DESCRIPTION:

The Array Model AR1F pneumatic relay is a compact instrument valve that is well suited for the rigors of inland and offshore safety systems. It functions as a 3-way normally closed, manual reset pneumatic valve with an internal orificed pilot output signal. Its detent (BYPASS) feature temporarily keeps the relay open until the proper pilot output signal is reached. The relay will close automatically when the Pilot Signal is removed. It may also be closed manually.

APPLICATIONS:

The Model AR1F relay is typically used as the primary relay for ESD/Fuse Loop control functions. It not only provides the necessary ESD/Fuse Loop charge and monitoring, but also will block and bleed the instrument pressure to any control devices or shutdown valves that receives instrument supply thru the Model AR1F relay.

FEATURES:

Field proven materials of construction
Charges and monitors ESD/Fuse Loop systems
Will "block & bleed" instrument pressure to shutdown valves or other control devices.
Auxillary port for attachment of pressure gauge for monitoring ESD/Fuse Loop pressure.
Detent pin for temporary "BYPASS"
Integral screen on "VENT" Port
Compact size saves space in panel use
Panel mountable using optional nut (not included with this unit)


OPERATION:

The relay shown in the figure below is in the "Out of Service" or closed position. Instrument pressure at the "Input" port is prevented from entering the relay Body (11) and any pressure downstream of the "Output" port has been exhausted thru the "Vent" port. The Spring (5) pushing down on the Shaft (3) in conjuction with the "Input" port being closed, prevents any pilot signal from opening the relay.

Pulling outward on the Knob (1) positions the relay in the "In Service" or open mode. Instrument pressure will enter into the relay Body, pass thru the Shaft and Shaft Orifice (11) then exit thru the "Pilot Signal Out" port. If all the sensors (i.e. fuse plugs, pressure sensors, level switches etc.)connected to this port are closed, pressure acting on the the piston end of the Shaft against the Spring will keep the relay open. Instrument pressure also passes thru the relay Body to the "Output" port to power other sensors or controls.

If there is no pilot signal present, the relay will not remain in the "In Service" position. Depressing the pin on the detent
assembly (2) into the mating groove on the Shaft and releasing the Knob will maintain the relay in the "in Service" position without a pilot signal being available. When a pilot signal of suitable pressure is established, the pin will release from the Shaft groove and the relay will remain in the "In Service" position.

The pilot signal is removed when a sensor is activated and opens sufficiently to vent at a greater rate than the Shaft Orifice, or the Knob is pushed in manually, the Spring will shift the Shaft to the "Out of Service" closed position and all pressure downstream of the "Output" port is exhausted.

Model AR10 manual reset pneumatic relay w/detent

GENERAL DESCRIPTION:

This version of the Array Model AR10 pneumatic relay is a compact manually operated instrument valve that is well suited for the rigors of inland and offshore production control systems. Functioning as a 3-way normally closed, manual reset pneumatic relay with detent (BYPASS) capability, it is well suited for pneumatic master and slave control panel control/indicating circuits.

APPLICATIONS:

The Model AR10 relay is ideal as the primary relay for "first-out" indicating circuits and actuator control functions. It is also well suited for "field mounting" on any pneumatic sensing or control device where ease of operation and temporary bypass features are required.

FEATURES:

Compact size saves space in panel use
Seals may be maintained without removal of instrumentation connections
Panel mountable using optional nut (not included with this unit)
Detent pin for temporary "BYPASS"
Easliy converted to Indicating Relay in the shop or field
Field proven materials of construction
Latch closed design prevents pilot signal from opening relay


OPERATION:

The relay shown in the figure below is in the "Out of Service" or closed position. Instrument pressure at the "Input" port is prevented from entering the relay Body (11) and any pressure downstream of the "Output" port has been exhausted thru the "Bleed" port. The Spring (5) pushing down on the Shaft (3) in conjuction with base 0-ring (7) & piston seal (10) keeps the "Pilot Signal" port closed and prevents any pilot signal from opening the relay.

Pulling outward on the Knob (2) positions the relay in the "In Service" or open mode. The pilot signal pressure (if any is present) will enter into the relay Body and pressurize the piston end of the Shaft against the Spring to keep the relay open. Instrument pressure passes thru the relay Body to the "Output" port and is prevented from exhausting thru the "Bleed" port.

If there is no pilot signal present, the relay will not remain in the "In Service" position. Depressing the pin on the detent assembly (2) into the mating groove on the Shaft and releasing the Knob will maintain the relay in the "in Service" position without a pilot signal being available. When a pilot signal of suitable pressure is established, the pin will release from the Shaft groove and the relay will remain in the "In Sevice" position.

As the pilot signal is removed, or the Knob is pushed in manually, the Spring will shift the Shaft to the "Out of Service" closed position.

Model AR11A field mount auto reset pneumatic relay

GENERAL DESCRIPTION:

This version of the Array Model AR11 pneumatic relay is a compact instrument valve that is well suited for the rigors of inland and offshore production control systems. It operates as a 3-way normally closed, automatic reset pneumatic valve with a detent (BYPASS) feature. Its construction makes it ideal for fiok

eld mounting on actuators, pressure sensors or other control devices.

APPLICATIONS:

The Model AR11 relay is ideal as the primary relay for actuator control functions as well as single well "loop" control circuits. It is designed to operate with any pneumatic sensing or control equipment where manual reset and temporary bypass features are required.

FEATURES:

Compact size saves space in panel use
Panel mountable using optional nut (not included with this unit)
Easliy converted to Indicating
Relay in the shop or field
Integral screen on "VENT" Port
Field proven materials of construction
Will automatically open upon application of signal pressure

 


OPERATION:

The relay shown in the figure below is in the "Out of Service" or closed position. Instrument pressure at the "Input" port is prevented from entering the relay Body (11) and any pressure downstream of the "Output" port has been exhausted thru the "Vent" port. The Spring (5) pushing down on the Shaft (3) keeps the relay in the Out of Service" position.

Pulling outward on the Knob (1) or applying instrument pressure to the "Pilot Signal" port, positions the relay in the "In Service" or open mode. The pilot signal pressure (if any is present) will enter into the relay Body and pressurize the piston end of the Shaft against the Spring to keep the relay open. Instrument pressure passes thru the relay Body
to the "Output" port and is prevented from exhausting thru the "Vent" port.

If there is no pilot signal present, the relay will not remain in the "In Service" position. Depressing the pin on the detent
assembly (2) into the mating groove on the Shaft and releasing the Knob will maintain the relay in the "in Service" position without a pilot signal being available. When a pilot signal of suitable pressure is established, the pin will release from the Shaft groove and the relay will remain in the "In Service" position.

As the pilot signal is removed, or the Knob is pushed in manually, the Spring will shift the Shaft to the "Out of Service"
closed position.

Model AR11M field mount manual reset pneumatic relay

GENERAL DESCRIPTION:

The Array Model AR11 pneumatic relay is a compact manually operated instrument valve that is well suited for the rigors of inland and offshore production control systems. It operates as a 3-way normally closed, manual reset pneumatic valve with a detent (BYPASS) feature. Its construction makes it ideal for field mounting on actuators, pressure sensors or other control devices.

APPLICATIONS:

The Model AR11 relay is ideal as the primary relay for actuator control functions as well as single well "loop" control circuits. It is designed to operate with any pneumatic sensing or control equipment where manual reset and temporary bypass features are required.

FEATURES:

Compact size saves space in panel use
Panel mountable using optional nut (not included with this unit)
Easliy converted to Indicating Relay in the shop or field
Integral screen on "VENT" Port
Field proven materials of construction
Latch closed design prevents pilot signal from opening relay
Detent pin for temporary "BYPASS"


OPERATION:

The relay shown in the figure below is in the "Out of Service" or closed position. Instrument pressure at the "Input" port is prevented from entering the relay Body (11) and any pressure downstream of the "Output" port has been exhausted thru the "Vent" port. The Spring (5) pushing down on the Shaft (3) in conjuction with poppet seal assembly (11) keeps the "Pilot Signal" port closed and prevents any pilot signal from opening the relay.

Pulling outward on the Knob (2) positions the relay in the "In Service" or open mode. The pilot signal pressure (if any is present) will enter into the relay Body and pressurize the piston end of the Shaft against the Spring to keep the relay open. Instrument pressure passes thru the relay Body to the "Output" port and is prevented from exhausting thru the "Vent" port.

If there is no pilot signal present, the relay will not remain in the "In Service" position. Depressing the pin on the detent assembly (2) into the mating groove on the Shaft and releasing the Knob will maintain the relay in the "in Service" position without a pilot signal being available. When a pilot signal of suitable pressure is established, the pin will release from the Shaft groove and the relay will remain in the "In Service" position.

As the pilot signal is removed, or the Knob is pushed in manually, the Spring will shift the Shaft to the "Out of Service" closed position.


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