Emerson Fisher 2625 And 2625Ns Data Sheet D200071X012_Jan15_AQ
2015-03-30
: Emerson Emerson-Fisher-2625-And-2625Ns-Data-Sheet-681828 emerson-fisher-2625-and-2625ns-data-sheet-681828 emerson pdf
Open the PDF directly: View PDF 
.
Page Count: 8
| Download | |
| Open PDF In Browser | View PDF |
Product Bulletin 2625 Volume Booster 62.3:2625 January 2015 D200071X012 Fisherr 2625 and 2625NS Volume Boosters A Fisher 2625 or 2625NS volume booster is used in conjunction with a positioner on a throttling control valve to increase stroking speed. The 2625NS is a nuclear‐service version and uses elastomeric components that better withstand high temperature and radiation environments. The booster incorporates fixed deadband, soft seat construction, and an integral bypass restriction to eliminate positioner saturation problems that can occur with volume boosters that do not have these features. Adjustment of the integral bypass restriction is necessary for system stability. This adjustment does not affect the deadband of the volume booster, but does permit the control valve to respond to small input signal changes without sacrificing steady‐state accuracy. It also allows the booster to deliver high‐volume output for fast stroking when large, rapid input signal changes occur. The volume booster is used to improve stroking speed. If precision valve control is required, the use of a positioner is recommended. If the volume booster is to be used only with an actuator, for on‐off control, the integral bypass restriction on the booster must be closed (turned fully clockwise). W4727-1 Features n Fast Response—Booster delivers the volume needed for rapid actuator stroking when large input changes suddenly occur. n Adjustable Response—Integral bypass restriction Connectors and piping can be installed with either 2625 or 2625NS volume booster for diagnostic testing. tunes the booster response so that smooth actuator motion follows the slow signal changes. n Efficient Operation—Soft seats provide tight shutoff to reduce unnecessary air consumption and eliminate saturation of positioner relays. The 2625 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. SIS certification is identified on the product by the EXIDA logo on the 2625 nameplate. www.Fisher.com n Maintains Accuracy—Booster permits high actuator stroking speeds upon demand without degrading the positioner steady‐state accuracy. n SIL 3 Capable - Certified for use in Safety Instrumented System (SIS) applications. Product Bulletin 2625 Volume Booster 62.3:2625 January 2015 D200071X012 Specifications Supply Pressure Ranges When used in conjunction with a positioner or other pneumatic accessory, always pipe the positioner and volume booster with one common supply through a Fisher 67D, 67DR, or 95H regulator (see figure 2). A high‐capacity filter, such as the Fisher 262K, should be installed in the supply line to the regulator. Supply pressure also must not exceed the maximum pressure rating of the actuator. Constructions are available in two maximum supply ranges. When Normally Used With Diaphragm Actuators: Up to 2.8 bar (40 psig) When Normally Used With Piston Actuators: Up to 10.3 bar (150 psig) Input Signal Pressure Positioner output Maximum Input Signal Pressure 10.3 bar (150 psig) Fixed Input‐to‐Output Pressure Ratio 1 to 1 Nominal Deadband Percent of Positioner Output Span(1): 2.4 mm (0.094 inch) exhaust port: 2% 9.5 mm (0.375 inch) exhaust port: 3.5% 12.7 mm (0.5 inch) exhaust port: 5% Upper and Lower Valves: 2625: Nitrile‐CSM rubber/aluminum/stainless steel 2625NS: EPDM/aluminum/stainless steel O‐Rings: 2625: Nitrile 2625NS: EPDM Connectors for Diagnostic Testing: J Stainless steel or J brass Operative Temperature Limits(2) 2625: -40 to 71_C (-40 to 160_F) 2625NS: -40 to 93_C (-40 to 200_F) Connections Input Signal: 1/4 NPT Supply and Output: 3/4 NPT Port Diameters(3) Supply Port: J9.5 mm (0.375 inch) or J 12.7 mm (0.5 inch) Exhaust Port: J2.4 mm (0.094 inch), J9.5 mm (0.375 inch) or J12.7 mm (0.5 inch) Maximum Flow Coefficients See table 1 Hazardous Area Classification Complies with the requirements of ATEX Group II Category 2 Gas and Dust Construction Materials Body: Aluminum Seat Ring: Brass Safety Instrumented System Classification SIL3 capable - certified by exida Consulting LLC Diaphragms 2625: Nitrile/nylon 2625NS: EPDM/meta‐aramid Approximate Weight 2.3 kg (5 lb) NOTE: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 - Process Instrument Terminology. 1. Zero to maximum supply. 2. The pressure/temperature limits in this document and any applicable code or standard should not be exceeded. 3. May be used in any combination. 2 Product Bulletin 2625 Volume Booster 62.3:2625 January 2015 D200071X012 Figure 1. Sectional View of Fisher 2625 Volume Booster INPUT SIGNAL BYPASS RESTRICTION ADJUSTING SCREW DIAPHRAGMS EXHAUST PORT BYPASS RESTRICTION EXHAUST SUPPLY PORT OUTPUT TO ACTUATOR SUPPLY W0679‐1 Principle of Operation Refer to figures 1 and 2. Because of the bypass restriction, large input signal changes register on the booster input diaphragm sooner than in the actuator. A large, sudden change in input signal causes a pressure differential to exist between the input signal and the output of the booster. When this occurs, he diaphragms move to open either the supply port or the exhaust port, whichever action is required to reduce the differential. The port remains open until the difference between the booster input and output pressures returns to within the deadband limit of the booster. With the bypass restriction adjusted for stable operation, a signal with small magnitude and rate changes passes through the bypass restriction and into the actuator without initiating booster operation. Both supply and exhaust ports remain closed, preventing unnecessary air consumption and possible saturation of positioner relays. 3 Product Bulletin 2625 Volume Booster 62.3:2625 January 2015 D200071X012 Figure 2. Typical Installations 2625 VOLUME BOOSTER 2625 VOLUME BOOSTER SUPPLY OUTPUT A SIGNAL OUTPUT B 2625 VOLUME BOOSTER DIGITAL VALVE CONTROLLER ACTUATOR 67D, 67DR OR 95H POSITIONER OUTPUT E1407 SIGNAL WITH A PISTON ACTUATOR POSITIONER SUPPLY ACTUATOR 67D, 67DR OR 95H A0794‐3 WITH A DIAPHRAGM ACTUATOR Note: 1 Connection location for diagnostic testing Table 1. Maximum Flow Coefficients(1) PORT SIZE COMBINATIONS Supply Port mm COEFFICIENTS Exhaust Port Supply Port Exhaust Port Inch mm Inch Cv Cv 9.5 3/8 2.4 9.5 12.7 3/32 3/8 1/2 3.74 3.74 3.74 0.23 2.29 3.40 12.7 1/2 2.4 9.5 12.7 3/32 3/8 1/2 4.98 4.98 4.98 0.24 2.30 3.40 0.37 0.31 FIELDVUE DVC2000 digital valve controller Low Pressure Relay High Pressure Relay Fisher 3570 valve positioner 0.13 0.19 0.25 0.15 0.20 0.25 Fisher 3582 valve positioner 0.17 0.19 Fisher 3610J, 3610JP, 3611JP, 3620J, 3620JP, 3621JP valve positioners 0.37 0.30 FIELDVUEt DVC6200, DVC6200 SIS, DVC6200f, DVC6200p, DVC6000, DVC6000 SIS, DVC6000f digital valve controllers 1. Consult your Emerson Process Management sales office for special stroking speed requirements. 4 Product Bulletin 2625 Volume Booster 62.3:2625 January 2015 D200071X012 Figure 3. Dimensions 1/4‐18 NPT INPUT CONN 21 (0.84) 111 (4.38) 9 EXHAUST HOLES 7 (0.28) DIA 3/4‐14 NPT SUPPLY CONN 48 (1.88) 60 (2.38) 3/4‐14 NPT OUTPUT TO ACTUATOR 121 (4.75) A0807‐3 mm (INCH) 2625NS for Nuclear Service Applications The 2625NS volume booster uses EPDM (ethylene‐propylene) elastomeric parts. These parts have superior resistance to degradation at elevated temperature and radiation levels. This version is designed for nuclear service applications where oil‐free supply air is available. Both the 2625 and 2625NS are available as safety‐related items when processed using the commercial grade dedication section of the 10CFR50, Appendix B, quality assurance program. 10CFR21 reporting is also part of the safety related processing program. Seismic operability testing has been done to qualify both versions as rigid items at levels up to 9g's uniaxial (in each axis). Further nuclear service qualification data is available on request. 5 Product Bulletin 2625 Volume Booster 62.3:2625 January 2015 Installation Figure 2 shows typical installations for the 2625 or 2625NS volume booster on piston and diaphragm actuators. A single regulator that supplies both the positioner and booster (or boosters) is recommended. The supply medium must be clean, dry, oil‐free air or non‐corrosive gas. D200071X012 Ordering Information When ordering, specify: 1. Supply and exhaust port sizes. See table 1 for Cv values. 2. Supply pressure range of up to 2.8 bar (40 psig) or up to 10.3 bar (150 psig). Note 3. Stroking speed information when being mounted at the factory, for proper tuning of the instruments. Specify either critical or non‐critical stroke speed time. Use a clean, dry, oil‐free air supply with instruments containing EPDM components. EPDM is subject to degradation when exposed to petroleum‐base lubricants. Note Critical stroke speed time example: Valve to stroke in both directions in 4 seconds or less. Non‐critical stroke speed time example: Valve to stroke in approximately 4 seconds in both directions. Keep in mind that many actuators require larger casing or cylinder connections to take full advantage of the booster's ability to deliver its high‐volume output. Dimensions are shown in figure 3. Ensure that the supply pressure is connected to correspond with the flow arrow on the booster. 6 4. Nuclear service, if applicable. Consult your Emerson Process Management sales office for ordering assistance. 2625 Volume Booster D200071X012 Product Bulletin 62.3:2625 January 2015 7 Product Bulletin 62.3:2625 January 2015 2625 Volume Booster D200071X012 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 and FIELDVUE are marks 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 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, Iowa 50158 USA Sorocaba, 18087 Brazil Chatham, Kent ME4 4QZ UK Dubai, United Arab Emirates Singapore 128461 Singapore www.Fisher.com E 8 1986, 2015 Fisher Controls International LLC. All rights reserved.
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.3 Linearized : Yes XMP Toolkit : Adobe XMP Core 5.4-c005 78.147326, 2012/08/23-13:03:03 Creator Tool : BroadVision, Inc. Modify Date : 2014:12:09 11:47:46-06:00 Create Date : 2014:12:09 11:34:17-06:00 Metadata Date : 2014:12:09 11:47:46-06:00 Format : application/pdf Title : D200071X012_Jan15_AQ Creator : - Producer : Acrobat Distiller 11.0 (Windows) Document ID : uuid:106047ab-94ef-47fd-9c14-c9d2b53d4437 Instance ID : uuid:20e04ee0-6ece-4df3-a7fd-107a7b184832 Page Count : 8 Author : -EXIF Metadata provided by EXIF.tools