Emerson Fisher 4194 Data Sheet
Contents
1. P RESET SUPPLY 34 4 4194 May 2013 REVERSE ACTION QUADRANT PROPORTIONAL BAND ADJUSTMENT FEEDBACK LINK La FEEDBACK SS CJ MOTION q FLAPPER PIVOT DIRECT ACTION NL QUADRANT INPUT MOTION FLAPPER DETAIL pe OUTPUT PRESSURE PD TO CONTROL DEVICE Sy PROPORTIONAL ONLY CONTROL RELAY SUPPLY PRESSURE TO To NOZZLE TO NOZZLE RESET BELLOWS OUTPUT RELAY VALVE PRESSURE RELIEF VALVE PRESSURE PROPORTIONAL PLUS RESET CONTROL C0742 WITH ANTI RESET WINDUP Principle of Operation Refer to figure 1 proportional only control 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 DIFFERENTIAL GAP CONTROL 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 respect to the flapper When the controller is in the reverse acting mode see flapper detail in figure 1 an in2. switch air consumption is 0 28 normal m3 hr 10 0 scfh 6 Also for transportation and storage limits 4194 Differential Pressure Controllers D200048X012 Table 1 Available Configurations Product Bulletin 34 4 4194 May 2013 CONFIGURATIONS UET Proportional Proportional Proportional Plus Differential Anti Reset Remote Set Internal Auto Only Plus Reset Reset Plus Rate 2 Gap Windup Point Manual Station 4194A x cee ae met 4194AE x een ae are Sus oes x 4194AM x eae nS ae ee x zen 4194AME x ne pee ae x xX 4194B x S J mF Ise ze 4194BE ee x mS A _ es x 4194BF one x a x ae ao 4194BFE ee x Bas _ x ee x 4194BM ace x ada x enh 4194BME ene x ge Sez x x 4194BFM aes x igs _ x x ae 4194BFME ace x x x x 4194C a ape X Ees pen R 4194CE gzs x o E aoe x 4194CF ee xX Bae x wee sis 4194CFE oe EEE xX aoe xX x 4194CM aoe x o TE x as 4194CME Sze x aoe a x x 4194CFM aoe Rae X SEE X xX ene 4194CFME X ap x x x 4194S ae TE x aa ae 4194SE a es X as ane xX 4914HSM nee ae xX xX one 4194SME oe Sn xX T X X 1 Reverse acting constructions are designated by an R added to the type number 2 Consult your Emerson Process Management sales office for information on rate Low Air Consumption Relay and nozzle design Featu res reduces steady state air consumption to as low as 3 m Easy Maintenance Simple design of the cont
3. 4194 Differential Pressure Controllers D200048X012 Product Bulletin 34 4 4194 May 2013 Fisher 4194 Differential Pressure Indicating Controllers Fisher 4194 low pressure differential pressure indicating controllers show process differential pressure and set point on an easy to read process scale The 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 The controllers use a capsular element for differential W5850 1 W5827 2 CONTROLLER YOKE MOUNTED ON ACTUATOR OF CONTROL VALVE pressure up to 2 0 bar 30 psi They are available for proportional only proportional plus reset and differential gap control The controller is also available see table 1 with anti reset windup internal auto manual station and remote set point adjustability see table 1 4194 controllers are used in industry where process monitoring and accurate measurement of differential pressures are required PROCESS PRESSURE SET POINT INDICATOR ADJUSTMENT SUPPLY OUTPUT PRESSURE PRESSURE GAUGE GAUGE INTERIOR OF CONTROLLER yy EMERSON www Fisher com Process Management Product Bulletin 34 4 4194 May 2013 Specifications 4194 Differential Pressure Controllers D200048X012 Available Configurations See table 1 Sensing
4. Element Range Input Signal See table 2 Process Scale E Linear square root or m others on request 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 m 0 4 to 2 0 bar 6 to 30 psig Differential Gap Output m 0 and 1 4 bar 0 and 20 psig or m 0 and 2 4 bar 0 and 35 psig Action Field reversible between m direct increasing sensed pressure increases output pressure or ll reverse increasing sensed pressure decreases output pressure Supply and Output Connections 1 4 NPT internal Supply Pressure Requirements 2 See table 3 Supply Pressure Medium Air or natural gas Remote Set Point Pressures E 0 2 to 1 0 bar 3 to 15 psig or m 0 4 to 2 0 bar 6 to 30 psig Construction Materials See table 4 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 E Internal Set Point Adjustment standard Internal adjustment knob Controller Performance 4 Repeatability 0 09 of process scale range Dead Band Less than 0 2 of process scale range Typical Frequency R
5. VIEW VERTICAL PIPE REAR VIEW DIMENSIONS OF PANEL CUTOUT REAR VIEW PIPESTAND MOUNTING PANEL MOUNTING WALL MOUNTING mm B1473 4 INCH Ordering Information Construction When ordering specify Refer to the specifications and the Construction f Features section Carefully review each specification and feature indicating your choice whenever a Application selection is to be made Refer to table 1 for type 1 Description of the service such as throttling or numbers add R to any type number if reverse action is on off desired 2 Pressure range composition and temperature of process fluid 3 Ambient temperature 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 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 her
6. aximum Bar Psid Bar Psid Bar Psid par Wee 5a psig Bar Psig Mercury 0to 0 4 0to5 0 2 2 5 0 4 5 0 4 10 0 4 5 0 5 7 5 0 to 0 7 Oto10 0 4 5 0 0 7 10 0 7 20 0 7 10 1 0 15 0 Oto 1 4 0 to 20 0 7 10 0 1 4 20 1 0 30 1 4 20 2 1 30 0 0 to 2 0 0 to 30 1 0 15 0 2 0 30 1 0 30 2 0 30 3 1 45 0 1 Span is adjustable between minimum shown and maximum of the capsular element operating range and can be positioned anywhere within this range For example if a 0 to 2 0 bar 0 to 30 psid capsular element is used and the minimum span of 1 0 bar 15 psid is set the process indication can be calibrated to a range of 0 to 1 0 bar 0 to 15 psid 1 0 to 2 0 bar 15 to 30 psid or any value between the minimum and maximum values of the operating range 2 Maximum difference between the two input supply pressures 3 Capsular element may be pressured to this valve after reaching travel stop at upper range limit without permanent zero shift of structural damage to controller components Table 3 Supply Pressure Data Output Signal Range Speen Supply ata tbe z Prevent 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 Table 4 Constru
7. crease in process differential pressure causes a decrease in output pressure Product Bulletin 34 4 4194 May 2013 Figure 2 Controller Construction Detail SET POINT ADJUSTMENT INPUT ELEMENT CAPSULAR ELEMENT CONNECTING LINK Notes 2 gt For the process pointer W3612 1 In addition to the proportional only 4194A version a controller is available for proportional plus reset control 4194B In this controller output pressure is fed back to the reset bellows as well as to the proportional bellows Anti reset windup is available on all controllers with reset Remote set point is available on all controllers The 4194S 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 counteracting it This construction causes the controller output to switch from full supply pressure to zero pressure or vice versa The schematic diagram figure 1 emphasizes detail of construction variations between control modes Refer to table 1 for a complete description of type number suffixes 4194 Differential Pressure Controllers D200048X012 PROPORTIONAL BAND COVER PROPORTIONAL BAND ADJUSTMENT lt 7 ZERO ADJUSTMENT lt 2 SPAN ADJUSTMENT lt 2 1 White portion of adjustment enables direct controller action black portion enables reverse controller action Construction Features S
8. ction Materials Part Standard Material Optional Material Case and cover Polyester plastic Exterior tubing Copper Aluminum stainless steel steel or polyethylene Exterior fittings C36000 brass Aluminum stainless steel steel or polyethylene Interior tubing S30400 304 stainless steel Capsular element N09902 Nickel alloy Nozzle 30300 303 stainless steel Flapper Relay springs 31600 316 stainless steel 30200 302 stainless steel or steel Relay O rings Nitrile Relay diaphragms Nitrile Other relay metal parts Aluminum or stainless steel Feedback bellows assembly C51000 bronze 32100 321 stainless steel Supply and output gauges Brass wetted parts only Stainless steel wetted parts only Remote set point bellows N09902 4194 Differential Pressure Controllers D200048X012 Product Bulletin Figure 1 Operational Schematic of Fisher 4194 Differential Pressure Controllers MANUAL SET POINT ADJUSTMENT PROPORTIONAL BELLOWS PROCESS POINTER REMOTE SET POINT CONNECTED HERE INPUT ELEMENT CONNECTED HERE CONNECTING LINK BEAM i FLAPPER RSA SUPPLY PRESSURE NOZZLE OUTPUT PRESSURE PROPORTIONAL PRESSURE NOZZLE PRESSURE __ RESET PRESSURE TO RESET TO BELLOWS NOZZLE TO OUTPUT TO PROPORTIONAL WE PROPORTIONAL BELLOWS ED BELLOWS RESET BELLOWS VENTED
9. ein 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 eS Singapore 128461 Singapore www Fisher com E M ERSO N 1991 2013 Fisher Controls International LLC All rights reserved
10. esponse 1 5 Hz and 90 deg phase shift with 3 05 m 10 feet of 6 44 mm 1 4 inch tubing and 1639 cm 100 in 3 volume Steady State Air Consumption 4 5 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 4 0 2 to 1 0 Bar 3 to 15 Psig Output 6 4 m3 hr 240 scfh 0 4 to 2 0 Bar 6 to 30 Psig Output 9 4 m3 hr 350 scfh Exhaust Capacity 4 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 Operative Ambient Temperature Limits 2 6 40 to 70 C 40 to 160 F Hazardous Area Classification Complies with the requirements of ATEX Group II Category 2 Gas and Dust C x m2eD Mounting Controller can be mounted on m actuator E panel wall or E pipestand Approximate Weight 4 5 kg 10 Ib 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 code or standard should 3 Natural gas should contain no more than 20 ppm of H2S not be exceeded 4 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 5 Without auto manual switch With auto manual
11. implified Relay Maintenance A clean out wire provides a fast easy means of cleaning the relay primary orifice during service Pressure Protection for the Case A rubber plug in the plastic case pops out to prevent excessive pressure buildup from occurring inside the case before structural damage can take place 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 2 4194 Differential Pressure Controllers D200048X012 Figure 3 Typical Yoke Mounting 657 ACTUATOR a N 4194 a CONTROLLER i l 1 J 1 J REGULATOR i Gh MOUNTING PLATE 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 Remote Set Point The capability of adjusting the set point from a remote location is available as an option on 4194 controllers Auto Manual Capability An internal auto manual station is available for smooth bumpless transfer from automatic to manual and ma
12. nual to automatic control of the controller output Product Bulletin 34 4 4194 May 2013 Figure 4 Controller Dimensions REMOTE SET POINT CONNECTION TOP VIEW gt 102 e 4 00 51 5 16 18 2 00 ane 3 HOLES MOUNTING k H 87 3 44 i o ja 255 10 04 a Bet 8 aoe REAR VIEW i 5 80 e3 1 4 NPT PRESSURE 4 HOLES mm BOTTOM VIEW INCH 46A9765 A A5710 1 The 4194 differential pressure controllers may be shipped alone for a separate installation or for installation on a control valve actuator The controllers can also be mounted on a pipe stand ona wall or in a panel When a controller is mounted on an actuator and a positioner is not used the controller will usually be opposite the supply regulator as shown in figure 3 If a positioner is used the supply regulator can be mounted on the actuator casing The controller must be installed so that the vent opening faces down Basic controller dimensions are shown in figure 4 Dimensions for specific mounting methods are shown in figure 5 Product Bulletin 34 4 4194 4194 Differential Pressure Controllers May 2013 D200048X012 Figure 5 Mounting Dimensions 92 t F 63 6 35 2 49 HORIZONTAL PIPE TOP VIEW TOP VIEW 14R _ 0 56R 36A9757 A 36A9759 A 236 9 31 36A9761 B 0 50 SIDE
13. roller DOST Hr Ney acy allows fast easy maintenance and minimal spare m Corrosion Resistant Tough plastic housing resists parts inventory corrosive environments Internal constructions are available to resist a corrosive supply pressure m Easy Adjustment Adjusting the set point and the media 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 adjusted with no interaction between the two adjustments Mounting Versatility The controller can mount directly on the actuator or it can mount ona pipestand on a wall or in a panel m Highly Visible Display Two red pointers on a 114 mm 4 1 2 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 m Vibration Resistant Simple design and low mass of internal parts allow the controller to withstand vibration encountered in most plant environments Product Bulletin 34 4 4194 4194 Differential Pressure Controllers May 2013 D200048X012 Table 2 Process Sensor Capsular Element Ranges and Pressure Ratings MINIMUM 1 STATIC PRESSURE AVAILABLE CAPSULAR DIFFERENTIAL MAXIMUM ALLOWABLE 2 OPERATING RANGE MAXIMUM ALLOWABLE 3 ELEMENT RANGES DIFFERENTIAL PRESSURE mar s STATIC PRESSURE SPAN Minimum M
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