Emerson Fisher 4194 Data Sheet
Contents
1. 2 0 bar 6 to 30 psig Output 9 4 m3 hr 350 scfh Exhaust Capacity 5 0 2 to 1 0 bar 3 to 15 psig Output 5 0 m3 hr 186 scfh 0 4 to 2 0 bar 6 to 30 psig Output 7 9 m3 hr 295 scfh continued Installation een dea Os sere ees cae eas 9 Ordering Information 00 cece eens 10 Applications 0 cece cece eee e eens 10 Construction sse sedere ae be Oe eed 10 i Product Bulletin 4194H Differential Pressure Controllers 34 4 4194H D200049X012 May 2013 Specifications continued Operative Ambient Temperature Limits 2 7 Mounting 40 to 70 C 40 to 160 F Controller is mounted on a pipestand Hazardous Area Classification Complies with the requirements of ATEX Group II Category 2 Gas and Dust Controller 4 5 kg 10 Ib without the differential amp 12G D pressure unit Differential Pressure Unit 21 5 kg 47 Ib Approximate Weight Housing Total Weight controller and differential pressure Designed to NEMA 3 Weatherproof and IEC 529 unit 26 kg 57 Ib with a Barton 199 Differential IP54 Specifications Pressure Unit NOTE Specialized instrument terms are defined in ANSI ISA Standard 51 1 Process Instrument Terminology 1 Consult your Emerson Process Management sales office for additional information 2 The pressure temperature limits in this document and any applicable standard or code limitation for valve should not be exceeded 3 This product can be used with na2. 4194H Differential Pressure Controllers D200049X012 Product Bulletin 34 4 4194H May 2013 Fisher 4194H Differential Pressure Indicating Controllers Fisher 4194H differential pressure indicating controllers show process differential pressure and set point on an easy to read process scale These high static pressure controllers sense two different pressures and compare the difference between these pressures with an operator adjusted set point A pneumatic signal is then delivered to a control element to change the process differential pressure toward the set point 4194H controllers use a differential pressure unit such as the Barton 199 for differential pressure up to 5 2 bar 75 psi The product line includes proportional only proportional plus reset and differential gap controllers The controllers are also available with anti reset windup internal auto manual station and remote set point adjustability see table 1 4194H controllers are used throughout industries where process monitoring and accurate measurement of differential pressure are required Features m Easy Maintenance Simple design of the controller allows fast easy maintenance and minimal spare parts inventory m Easy Adjustment Adjustments of set point and zero and span of the process pointer and switching between direct and reverse action are accomplished quickly and without special tools Also the set point and proportional band can be adju
3. ANT LINK NS MOTION SS FLAPPER DETAIL BER _v OUTPUT PRESSURE lt O TO CONTROL DEVICE FLAPPER i SUPPLY PRESSURE NOZZLE gt i RELAY OUTPUT PRESSURE f PROPORTIONAL PRESSURE SUPPLY PRESSURE NOZZLE PRESSURE C RESET PRESSURE PROPORTIONAL ONLY CONTROL on TO NOZZLE RESET TO BELLOWS TO NOZZLE BELLOWS NOZZLE TO 1 RESET BELLOWS OUTPUT t a OUTPUT 4 TO OUTPUT 5 PROPORTIONAL w TO BELLOWS EB PROPORTIONAL a w SUPPLY PRESSURE SUPPLY PROPORTIONAL PLUS RESET CONTROL PROPORTIONAL PLUS RESET CONTROL PRESSURE DIFFERENTIAL GAP CONTROL WITH ANTI RESET WINDUP C0742 Principle of Operation 4194H Controllers Refer to the proportional only control diagram in figure 1 The input element is connected to the process pointer and flapper by a connecting linkage As the process differential pressure increases in a direct acting controller the flapper moves toward the nozzle restricting flow through the nozzle and increasing nozzle pressure When this occurs relay action increases the output pressure delivery of the controller Output pressure is fed back to the proportional bellows The action of the proportional bellows counters the flapper movement that resulted from the process differential pressure change and backs the flapper away from the nozzle Set point adjustment also changes the proximity of the nozzle and flapper however when the set point is changed the nozzle moves with re
4. C51000 bronze 32100 321 stainless steel assembly pas output Brass wetted parts only Stainless steel wetted parts only Remote set point bellows N09902 nickel alloy Barton 199 Differential Pressure Unit Mounting plates Zinc plated steel Bellows Stainless steel Housing Steel Stainless steel Table 4 Supply Pressure Data Output Signal Range Normal Operating Supply Pressure 1 Maximum Pressure to Prevent Internal Damage 2 0 2 to 1 0 or 0 and 1 4 differential gap 1 4 3 4 Bar 0 4 to 2 0 or 0 and 2 4 differential gap 2 4 3 4 3 to 15 or 0 and 20 differential gap 20 50 Psig 6 to 30 or 0 and 35 differential gap 35 50 1 If this pressure is exceeded control stability may be impaired 2 If this pressure is exceeded damage to the controller may result Product Bulletin 4194H Differential Pressure Controllers 34 4 4194H D200049X012 May 2013 Figure 1 Operational Schematic of Fisher 4194H Differential Pressure Controllers MANUAL SET POINT ADJUSTMENT RESET BELLOWS VENTED REVERSE ACTION PROPORTIONAL P QUADRANT A BELLOWS ra PROPORTIONAL i AE BAND ADJUSTMENT FEEDBACK PROCESS POINTER 7 He LINK REMOTE SET POINT 7 p l CONNECTED HERE CN ii Wa ip j gt FEEDBACK Sy INPUT ELEMENT Wiis aS A Se f E MOTION FLAPPER PIVOT CONNECTED HERE ToS att AS Fes DIRECT ACTION pur CONNECTING X N bs QUADR
5. air flow through the tube Construction Features Simple Relay Maintenance A clean out wire provides a fast easy means of cleaning the relay primary orifice during service Pressure Protection for the Case Arubber plug in the plastic case pops out to prevent excessive pressure buildup inside the case thus preventing structural damage Easy Direct Reverse Switching Controller action can be switched from direct to reverse or vice versa by simply loosening the screws on the proportional band cover and moving the cover out to rotate the proportional band knob to the desired action see figure 4 Easy Mode Conversion Conversion from proportional to proportional plus reset control requires the addition of a reset valve and two pieces of tubing Conversion from proportional to differential gap control requires the addition of one piece of tubing Anti Reset Windup Anti reset windup is available with proportional plus reset controllers Relief valve may be installed to limit reset windup in either direction Product Bulletin 34 4 4194H May 2013 Remote Set Point The capability of adjusting the set point from a remote location is available as an option on the 4194H controllers Auto Manual Capability An internal auto manual station is available for smooth bumpless transfer from automatic to manual and manual to automatic control of the controller output The two position switch showing either automatic or manual m
6. ctions are designated by an R added to the type number 2 Consult your Emerson Process Management sales office for information on rate Product Bulletin 34 4 4194H May 2013 4194H Differential Pressure Controllers Table 2 Process Sensor Barton 199 Ranges and Pressure Ratings D200049X012 AVAILABLE DIFFERENTIAL PRESSURE UNIT OPERATING RANGES STATIC PRESSURE OPERATING RANGE mbar Inch wc Bar Psig 0 to 50 0 to 20 0 to 63 Oto 25 Oto 125 0 to 50 Oto 188 Oto75 0 to 250 Oto 100 1 1 Bar Psi Oto 1 0 Oto15 0to3 4 0to 50 Oto 5 2 Oto75 1 Available in ranges of 0 to 70 bar 0 to 1000 psig 0 to 172 bar 0 to 2500 psig and 0 to 413 bar 0 to 6000 psig Actual static pressure depends on differential pressure unit rating and materials Table 3 Construction Materials Product Part Standard Material Optional Material 4194H Controllers Case and cover Polyester plastic Exterior tubing Copper Aluminum stainless steel steel polyethylene Exterior fittings 36000 brass Aluminum stainless steel steel polyethylene Interior tubing Copper 30400 304 stainless steel Nozzle S30300 303 stainless steel Flapper 31600 316 stainless steel Relay springs 30200 302 stainless steel steel Relay O rings Nitrile Relay diaphragms Nitrile Other relay metal parts Aluminum stainless steel Feedback bellows
7. ect increasing sensed pressure increases output pressure or E reverse increasing sensed pressure decreases output pressure Supply and Output Connections 1 4 NPT internal Supply Pressure Requirements 2 See table 4 Supply Pressure Medium Air or natural gas 3 Table of Contents Features n te sacs 5 5 neta a a aa aless ortea se abot 1 Construction Features 0 eee eee 7 Principle of Operation 00 cece eee 5 4194H Controllers 0 0 eee ee ee eee 5 Auto Manual Option eee e eens 6 4194H Differential Pressure Controllers D200049X012 Remote Set Point Pressures E 0 2 to 1 0 bar 3 to 15 psig or E 0 4 to 2 0 bar 6 to 30 psig Construction Materials See table 3 Controller Adjustments Proportional Band 5 to 500 of process scale range Reset Adjustable from 0 01 to more than 74 min per repeat from 100 to less than 0 0135 repeats per min Differential Gap Controllers Adjustable from 1 to 100 of process scale range Set Point Continuously adjustable from 0 to 100 of the scale range Controller Performance 4 Repeatability 0 4 of process scale range Dead Band Less than 0 2 of process scale range Steady State Air Consumption gt 6 0 2 to 1 0 bar 3 to 15 psig Output 0 09 m3 hr 3 5 scfh 0 4 to 2 0 bar 6 to 30 psig Output 0 13 m3 hr 5 0 scfh Delivery Capacity 5 0 2 to 1 0 bar 3 to 15 psig Output 6 4 m3 hr 240 scfh 0 4 to
8. hasizes detail of construction variations between control modes Refer to table 1 for a complete description of type number suffixes Auto Manual Option Controllers with the auto manual option have piping on the output side of the relay as shown in figure 2 Supply pressure to the relay is also applied to the manual loader The manual loader functioning as a regulator applies pressure to one side of the plastic tube and to the auto manual switch Output pressure from the relay registers on the other side of the plastic tube as well as in the auto manual switch When the auto manual switch is in the MAN position the output of the manual loader which is adjustable by the manual loader knob is channelled through the auto manual switch and becomes the output of the controller When the auto manual switch is in the AUTO position the output of the relay is channelled through the switch to become the output of the controller 4194H Differential Pressure Controllers D200049X012 Before the auto manual switch is operated the output of the relay must equal the output of the manual loader to avoid bumping the process Adjusting the set point varies the pressure on the left hand side of the plastic tube Adjusting the manual loader knob varies the pressure on the right hand side When the pressures are equal the metal ball is centered in the tube Pressure imbalance will force the ball to one end of the tube where it forms a seal blocking
9. he Emerson Process Management business unit of Emerson Electric Co Emerson Process Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 18087 Brazil Chatham Kent ME4 4QZ UK Dubai United Arab Emirates Singapore 128461 Singapore www Fisher com EMERSON a Fs De ICC 3 ar Process Management 1991 2013 Fisher Controls International LLC All rights reserved
10. ode is clearly visible with the controller cover closed External Feedback In controller override applications this option minimizes reset windup in the secondary controller see figure 3 This option is available only with the two mode 4194HB controllers Figure 3 Schematic of External Feedback Option TO RESET TO BELLOWS NOZZLE PRESSURE BELLOWS Y jaaaeane EXTERNAL FEEDBACK TO SUPPLY PRESSURE OUTPUT OF HIGH OR LOW OUTPUT PRESSURE SELECT RELAY MM NOZZLE PRESSURE At RESET PRESSURE Product Bulletin 34 4 4194H 4194H Differential Pressure Controllers May 2013 D200049X012 Figure 4 Controller Construction Details lt Ke A a A M ZONE A INCREASE MANUA t l Fr E ES tis AUTO MANUAL OPTION A20 40 60 go 100 PERCENT oo T CONNECTING LINK 2 gt ZERO ADJUSTMENT PROPORTIONAL TAS BAND 2 gt SPAN ADJUSTMENT s j ADJUSTMENT W5826 Notes 1 gt White portion of adjustment enables direct controller action black portion enables reverse controller action 2 gt For the process pointer 4194H Differential Pressure Controllers D200049X012 Figure 5 Dimensions 330 13 00 ps Se 147 a 5 80 S 2 56 1 418 NPT EXTERNAL FEEDBACK CONNECTION 1 4 NPT 2 HOLES WHEN APPLICABLE BOTTOM VIEW 18A5903 D A2926 2 Installation A 4194H controller mounts on a pipestand and must be installed with the vent o
11. pening facing down The coupling is secured to the pipestand by set screws Figure 5 shows controller dimensions including those necessary for installation Product Bulletin 34 4 4194H May 2013 REMOTE SET POINT CONNECTION TOP VIEW 1 2 NPT 2 PLACES 1 4 NPT 2 PLACES 351 13 81 SIDE VIEW mm INCH Product Bulletin 34 4 4194H May 2013 Ordering Information When ordering specify Application 1 Description of the service such as throttling or on off 2 Pressure range composition and temperature of process fluid 3 Ambient temperature 4194H Differential Pressure Controllers D200049X012 Construction Refer to the specifications and the Construction Features section Carefully review each specification and feature indicating your choice whenever a selection is to be made Refer to table 1 for type numbers add R to any type number if reverse action is desired A Product Bulletin 4194H Differential Pressure Controllers 34 4 4194H D200049X012 May 2013 Product Bulletin 34 4 4194H 4194H Differential Pressure Controllers May 2013 D200049X012 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 t
12. spect to the flapper When Product Bulletin 34 4 4194H May 2013 Figure 2 Schematic of Auto Manual Option AUTOMATIC POSITION AUTO MANUAL SWITCH OUTPUT PRESSURE TOCONTROLDEVICE SSL EN RELAY SUPPLY PRESSURE RELAY OUTPUT PRESSURE SUPPLY PRESSURE E MANUAL LOADER OUTPUT PRESSURE 48A5230 A A2927 1 the controller is in the reverse acting mode see flapper detail in figure 1 an increase in process differential pressure causes a decrease in output pressure In addition to the 4194HA proportional only version the 4194HB controller is available for proportional plus reset control In this controller output pressure is fed back to the reset bellows as well as to the proportional bellows Remote set point is available on all controllers Anti reset windup is available on all controllers with reset The 4194HS controller provides differential gap control In this version feedback pressure is piped directly to the reset bellows reinforcing the change in flapper position rather than the counteracting it This construction causes the controller output to switch from full supply pressure to zero pressure or vice versa 4194H Differential Pressure Controllers D200049X012 MANUAL LOADER MANUAL LOADER KNOB PLASTIC TUBE METAL BALL MANUAL KS POSITION AUTO MANUAL f SWITCH OUTPUT PRESSURE TO CONTROL DEVICE The schematic diagram figure 1 emp
13. sted with no interaction between the two adjustments m Highly Visible Display Two red pointers on a 114 mm 4 50 inch long white on black scale show differential pressure and deviation from set point at a glance Two other gauges monitor supply and output pressures W5825 CONTROLLER WITH DIFFERENTIAL PRESSURE UNIT PROCESS DIFFERENTIAL SET POINT PRESSURE INDICATOR ADJUSTMENT SUPPLY OUTPUT W5826 1 PRESSURE PRESSURE GAUGE GAUGE INTERIOR OF CONTROLLER m Low Air Consumption Relay and nozzle design reduces steady state air consumption to as low as 0 09 m3 hr 3 5 scfh m Corrosion Resistant Thermoplastic housing withstands a broad range of corrosive environments Internal constructions are available to resist a corrosive supply pressure media KS a w EMERSON www Fisher com Process Management Product Bulletin 34 4 4194H May 2013 Specifications Available Configurations See table 1 Sensing Element Range Input Signal See table 2 Process Scale E Linear W square root or W others on request 7 Process Connections Standard 1 4 NPT internal stainless steel all input ranges Optional 1 2 NPT external stainless steel Output Signal Proportional or Proportional Plus Reset Range E 0 2 to 1 0 bar 3 to 15 psig or E 0 4 to 2 0 bar 6 to 30 psig Differential Gap Output E Oand 1 4 bar 0 and 20 psig or E 0 and 2 4 bar 0 and 35 psig Action Field reversible between W dir
14. tural gas Natural gas should not contain more than 20 ppm of H2S 4 With Barton 199 differential pressure unit 5 Normal m3 hr normal cubic meters per hour m3 hr 0 C and 1 01325 bar absolute Scfh standard cubic feet per hour ft3 hr at 60 F and 14 7 psig 6 Without auto manual switch With auto manual switch air consumption is 0 27 m3 hr 10 scfh 7 Also for transportation and storage limits Table 1 Available Configurations CONFIGURATIONS Race Proportional Proportional Proportional Plus Differential Anti Reset Remote Set Internal Auto Only Plus Reset Reset Plus Rate 2 Gap Windup Point Manual Station 4194HA X Sne saz TES 4194HAE X Ssn wee mists X 4194HAM X a a gt X 4194HAME X eile oie X X 4194HB E X wes aia 4194HBE ESE X gt gt Eia X 4194HBF 3c X oon 2s X a9 Se 4194HBFE X noe Sai X See X 4194HBM ESS X E wae ass X sia 4194HBME Jew X E aoe Sog X X 4194HBFM X nce tel X X Fen 4194HBFME SES X RRA uaa X X X 4194HC ree are x aoe SSS 4194HCE se aoe x aoe we soc X 4194HCF E occ X saa X zE San 4194HCFE a ia X oat X Sbs X 4194HCM Sec oe X aoe Fetes X SEs 4194HCME gas X X X 4194HCFM sE Eee X ESS X X ise 4194HCFME aoe Ssi X se xX xX X 4194HS ase Saini sen X Se soe TER 4194HSE g zes Stn X a spe X 4914HSM SER ace aan X EASE X PAE 4194HSME sss a sis X sag X X 1 Reverse acting constru
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