• Superior Performance—Repeatability meets the U.S. Minerals Management Service test tolerances referenced in Outer Continental Shelf (OCS) Order No. 5 and defined in the American Petroleum Institute (API) RP14C standard.
• Easy Maintenance—Simple modular construction plus a line of prepackaged parts kits makes pilot maintenance fast and easy.
• Reliable Operation—The pilot uses a field-proven Bourdon tube process pressure sensing element that reduces maintenance by eliminating the need for wetted dynamic O-rings.
• Environmental Packaging—Construction materials have been selected to protect the pilot from corrosive environments such as the salt spray atmosphere of offshore platforms.

• Vibration Resistance—The rugged Bourdon tube sensing element and shock-absorbing switch points dampen the effects of vibration while maintaining performance.
• Set Point Accuracy—Standard high-resolution set point adjustments are easy to set, non-interactive, and can be locked in place to maintain the desired set point. The optional set point indication assemblies on the front panel are easy to read and let you simply dial in the desired set point.
• Cost-Effective Design—One pilot provides either a high-low function or a single switch point, whichever the application requires.
• Installation Versatility—Panel, rack, pipestand, or actuator mounting is available to meet field requirements.
• Operational Indications—A supply pressure test function is provided. The optional output indicator lets you check at a glance whether the pilot output pressure is at full output or zero output pressure.
• NACE Conformance—An N05500 nickel alloy Bourdon tube is available for those applications where the pilot must meet the requirements of NACE Standard MR0175-2002.

Available Configurations

■High-low, ■low-only, or ■high-only set point capability

Input Signal

Type: Process pressure sensed with a Bourdon tube
Bourdon Tube Ratings: See table 1 or 2 Overpressure Protection: Maximum allowable emergency process pressures and maximum allowable process pressures to ensure set point readjustability are shown in table 3

Output Signal

■Zero pressure or ■full supply pressure (automatically resets)

Supply Pressure(1)

Normal Operating Pressure: 1.4 to 4.4 bar (20 to 65 psig)
Medium: Air or natural gas(2) Quality: Should be dry with solid particles removed

Steady-State Air Consumption(3)

Output Signal at 0 psig: ≤0.134 normal m3/hr (≤5 Scfh)
Output Signal at Full Supply Pressure: ≤0.00134 normal m3/hr (≤0.05 Scfh)

Set Point Adjustments

Continuously adjustable between 3 and 97% of Bourdon tube rating; see table 1 or 2 for ranges

Performance in Percentage of Bourdon Tube Rating

Repeatability: ≤0.25%
Set Point ΔPmin .
(See table 1 or 2)
Single High-Low Unit: 10% for up to 170 bar (2500 psig) Bourdon tubes; 15% for 350, 500, and 700 (NACE) bar (5000, 7500, and 10,000 (NACE) psig) Bourdon tubes
Low-Only and High-Only Pair: 3%
Trip-to-Reset Zone: ≤1.5% (see table 1 or 2)

Exhaust Capacity

Cg ≥15

Construction Materials

Case and Cover: Polyester
Front Cover: Tinted polycarbonate with scratch-resistant coating
Base: Hard-anodized nickel-sealed aluminum alloy
Bourdon Tube: ■316 stainless steel, or ■N05500 nickel alloy
Relay Body, Relay Flange, Nozzle/Flapper Assembly Orifice Block, and Switch Point. Housings: Glass-filled polyphenylene sulfide
Relay Diaphragm: ■Nitrile/Polyester or ■Fluorosilicone/Polyester (low temperature version), or ■Fluorocarbon/Polyester
Relay Disks: ■Nitrile, ■Fluorosilicone (low temperature version), or ■Fluorocarbon/Polyester
Process Pressure Block, Tubing, Front Plate, Flapper, Linkages, and Other Major Metal Parts: Stainless steel
Gaskets: Chloroprene and nitrile
O-Rings.
Relay: ■Nitrile or ■Fluorocarbon
Switchpoint Assembly: Nitrile impregnated with molybdenum disulphide
Base/Case: Nitrile

Operating Conditions(1)

Operating Influences on Switch Point Sensitivity

Supply Pressure: ≤0.05% of Bourdon tube rating for a 10% change in supply pressure
Ambient Temperature: ■≤1.5% (standard construction) or ■≤2.5% (low temperature version) of Bourdon tube rating throughout normal operating limits with nominal reference
Time: ≤1% of Bourdon tube rating over 30 days at ambient temperature nominal reference
Process Pressure: Range shift or set point drift can occur if process pressure exceeds the Bourdon tube rating

Pressure Connections

1/4 NPT internal

Mounting

■Panel, ■rack, ■pipestand, or ■actuator

Hazardous Area Classification

Complies with the requirements of ATEX Group II Category 2 Gas and Dust

Approximate Weight

2.3 kg (5 pounds)

Options

■Visual output indication, ■fluorocarbon elastomers in relay, ■low-temperature version to -59°C (-75°F) ■316 stainless steel panel mounting flange, ■set point indication, and ■tamper-resistant front cover

Application

• Bourdon tube rating and material
• Composition, pressure, and temperature of the process fluid
• Ambient temperature range
• Description of application

Construction

Refer to the Specifications table. Review the information under each specification and in the referenced tables; specify the desired selection whenever there is a choice to be made.

Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end-user.