Data Sheet

ManualsBrandsEmerson ManualsField InstrumentationEmerson Fisher 4660

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Fisherr 4660 High-Low Pressure Pilot

The Fisher 4660 pneumatic high-low pressure pilot

activates safety shutdown systems for flowlines,

production vessels, and compressors. This pilot is

available with either single or dual set point capability,

using switch points to maintain full output pressure

when the process pressure is within the set point

range. If the process pressure is outside this range, the

pilot switches from full output pressure to zero output

pressure.

The primary switching mechanism in this pilot is a

block-and-bleed relay assembly. This construction can

be used in both block-and-bleed and bleed-only

systems.

Unless otherwise noted, all NACE references are to

NACE MR0175-2002.

Features

n Safety Certification—The 4660 is certified for use in

Safety Instrumented System (SIS) applications.

Certification is by exida Consulting LLC, a global

provider of functional safety and control system

security (see figure 1). SIS certification is identified

on the product by a label affixed to the case.

The functional safety assessment was performed to

the requirements of IEC 61508: ed2, 2010, SIL3 for

mechanical components.

n 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.

n Cost-Effective Design—One pilot provides either a

high-low function or a single switch point,

whichever the application requires.

X0231

FISHER 4660 HIGH-LOW PRESSURE PILOT

WITH BLOCK AND BLEED RELAY

Figure 1. exida Certificate

4660 Pressure Pilot

D200051X012

Product Bulletin

34.5:4660

January 2014

Summary of content (12 pages)

PAGE 1
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Fisherr 4660 High-Low Pressure Pilot The Fisher 4660 pneumatic high-low pressure pilot activates safety shutdown systems for flowlines, production vessels, and compressors. This pilot is available with either single or dual set point capability, using switch points to maintain full output pressure when the process pressure is within the set point range.
PAGE 2
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 n NACE Conformance—A NACE compliant Bourdon Figure 2. Fisher 4660 High-Low Pressure Pilot with Block and Bleed Relay; Left Side with Case Cover Off tube is available for those applications where the pilot must meet the requirements of NACE MR0175-2002.
PAGE 3
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Specifications Available Configurations Exhaust Capacity Cg ≥15 J High-low, J low-only, or J high-only set point capability Construction Materials Case and Cover: Polyester Front Cover: Tinted polycarbonate with scratch-resistant coating Base: Hard-anodized nickel-sealed aluminum alloy Bourdon Tube: J S31600 SST or J NACE compliant material Relay Body, Relay Flange, Nozzle/Flapper Assembly Orifice Block, and Switch Point.
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Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Specifications (continued) Mounting Safety Instrumented System Classification SIL3 capable certified by exida Consulting LLC J Panel, J rack, J pipestand, or J actuator Approximate Weight 2.
PAGE 5
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Table 3. Maximum Allowable Process Pressure(1) BOURDON TUBE RATING Bar(2) MAXIMUM ALLOWABLE EMERGENCY PROCESS PRESSURE Psig 6.9 17.2 34.5 69.0 103.4 172.4 344.8 517.2 689.5 100 250 500 1000 1500 2500 5000 7500 10,000 6.9 17.2 34.5 69.0 103.4 172.4 344.8 517.2 689.
PAGE 6
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Figure 3. Principle of Operation Schematic LOW SETPOINT PIVOT PROCESS PRESSURE HIGH SETPOINT PIVOT LOW SETPOINT ADJUSTMENT HIGH SETPOINT ADJUSTMENT SPRING FLAPPER NOZZLE BEAM BLOCK AND BLEED RELAY ASSEMBLY BOURDON TUBE SUPPLY PRESSURE 38A3803-A A2898-2 Principle of Operation Refer to figure 3. Process pressure is connected to the Bourdon tube sensing element.
PAGE 7
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 SL represents the low set point and SH represents the high set point. The set range capability is 3 to 97 percent of the Bourdon tube rating. However, with a single high-low unit or a high-only/low-only pair, there is a limit on how close to each other the set points can be adjusted. This limit is defined as set point ΔPMIN and is shown as SL′ and SH′. Figure 4.
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Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Figure 5. Typical Connection Schematics PROCESS SUPPLY NO. 2 SUPPLY PROCESS NO. 1 PROCESS OUTPUT OUTPUT OUTPUT 38A6085-B A. HIGH-ONLY AND LOW-ONLY PILOTS SENSING A SINGLE PROCESS POINT AND HAVING A SINGLE OUTPUT 38A6084-B B. LOW-ONLY AND HIGH/LOW PILOTS WITH DUAL OUTPUTS AND DIFFERENT PROCESS PRESSURES PROCESS OUTPUT TO SUPPLY OUTPUT SUPPLY OUTPUT PROCESS NO. 1 SUPPLY PROCESS NO. 2 C.
PAGE 9
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Figure 6. Panel Mounting Dimensions 130 (5.12) 107 (4.22) 57 (2.25) 5/16-UNC-2B 28 (1.12) 57 (2.25) 208 (8.19) 183 (7.22) 62 (2.44) 70 (2.75) FIELD MOUNTING PANEL MOUNTING 212 (8.34) RIGHT SIDE VIEW Note: All connection are 1/4 NPT. 39A1578-A 18A3804-G B1589-3 5.2 (0.20) DIAMETER HOLES 5.2 (0.20) DIAMETER HOLES 195 (7.69) 186 (7.31) 195 (7.69) 205 (8.06) 98 (3.84) 98 (3.84) 4 (0.16) 109 (4.29) 117 (4.
PAGE 10
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Figure 7. Pipestand Mounting Dimensions OPTIONAL 233.4 (9.19) 184.2 (7.25) 168.1 (6.62) 108 (4.25) VERTICAL PIPESTAND MOUNTING SUPPLY CONNECTION OUTPUT CONNECTION 212.9 (8.
PAGE 11
Product Bulletin 4660 Pressure Pilot 34.5:4660 January 2014 D200051X012 Ordering Information n Ambient temperature range When ordering, specify: n Description of application Application Construction n Bourdon tube rating and material 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.
PAGE 12
Product Bulletin 34.5:4660 January 2014 4660 Pressure Pilot D200051X012 Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher is a mark owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co.