Abma boiler water quality guidelines. User Guide and Engine Fix Collection.

Abma boiler water quality guidelines 1 Boiler Water Total Dissolved Solids (ppm) 700 -3500 Alkalinity Maximum (ppm of CaCO The document discusses requirements and standards for boiler feed water and boiler water quality. User Guide and Engine Fix Collection. 2 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers 2005 ABMA(BOILE R) 16 401 Boiler Water Limits and Achievable Steam Purity for Water-Tube Boilers 1995 ABMA(BOILE R) 17 300 Guidelines for Performance Evaluation of Heat Recovery Steam Generating Equipment 1995 ABMA(BOILE R) Asme Boiler Water Quality Guidelines 5 5 Alkalinity Codes & Standards - ASME RECOMMENDED ABMA & ASME BOILER WATER LIMITS – Download as Excel Description: this is the table of boiler Download scientific diagram | ASME guidelines for water quality in boilers. purity is specified in NAVSEA S9086-GX-STM-020, Section 220, Volume 2, Boiler. VAM = Use only volatile alkaline materials. 1) “Consensus on Operating Practices for the Control of Feedwater and Boiler Water Chemistry in Modern Industrial Boilers,” and. standard by American Boiler Manufacturers Association, 01/01/2012. While there are other considerations (such as corrosion and deposit formation) in establishing boiler water composition, the limits indicate that requirements for feedwater purity become more stringent as operating pressure increases. 100 0. , 2018-02-23 Introductory technical guidance for mechanical The Water Technology Subcommittee of the ASME Research and Technology Committee on Water and Steam in Thermal Systems, under the leadership of Mr. This document is published for general guidance as a supplement to detailed operating manuals supplied by the equipment Boiler Water Quality Requirements and Associated Steam Quality for Industrial/Commercial and Institutional Boilers ABMA . 10/1/2020 . Shore-to-Ship Steam Quality. Table 1 provides guidelines by ABMA and ASME for controlling boiler water and steam quality. from publication: Boiler systems optimization | Boilers required a high amount of water to make hot water or steam for Introduction: The purpose of this publication is to acquaint engineers, purchasers and operators of industrial, commercial and institutional (ICI) boilers with ABMA's judgment as to the relationship between boiler water quality and boiler performance. Asme Boiler Water Quality Guidelines - 1 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers 2012 ABMA(BOILE R) 2 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers 2005 ABMA 12 100 Packaged Boiler Engineering Manual 1998 ABMA(BOILE R) 13 301 Guidelines for Boiler Control Systems (Gas/Oil Fired Boilers) 1998 ABMA ABMA Publications. Total dissolved solids. This document provides consensus guidelines for water chemistry parameters and limits in various types of industrial boilers. Quality water boiler pressure high feedwater table silica performance hard under typical column achieve increases Boiler feed water preheating process diagram typical biscuits bread cakes efficiency Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors Boiler water feed abma corrision reducing scale part table blow percent concentration association based downExplanation of boiler feed water & it's treatment Quality water boiler pressure high feedwater table silica performance hard under typical column achieve increases modeled stepwise concentration treatment trainBoiler water treatment – visipraxis. Today, the ASME "Consensus on Operating Practices for the Control of Feedwater and Boiler Water Quality in Modern Industrial Boilers," shown in Table 13-2, is frequently used for establishing blowdown rates. 8 °C, Water Quality Limit of Feed-water, Boiler water, Steam purity. Reference International Boiler water limit (ABMA) ASME guidelines for water quality in modern industrial water tube boilers for reliable The purpose of this document is to provide basic guidelines to the inservice boiler inspector for boiler/feedwater treatment and the recognition of normal/abnormal boiler/feedwater conditions for power boilers, steam heating boilers, and hot water heating boilers. It discusses key water quality parameters such as pH, conductivity, oxygen and silica. Feed water for steam boilers ABMA-Boiler 100; ABMA-Boiler 100 Packaged Boiler Engineering Manual. Details. representing the best of the boiler industry Boiler Water Quality Requirements and Associated Steam Quality for Industrial/Commercial and Institutional Boilers 2005 American Boiler Manufacturers Association 8221 Old Courthouse Road, Suite 207 Introduction: The purpose of this publication is to acquaint engineers, purchasers and operators of industrial, commercial and institutional (ICI) boilers with ABMA's judgment as to the relationship between boiler water quality and boiler performance. ND = non detectable. in boiler ppm (max. ABMA Water Guide - Free download as PDF File (. c Actual values within the range are directly proportional to the actual Boiler Water Composition Limits. 8 °C, 135. 3. The continuous blowdown rate is set to control the boiler water within these ABMA-recommended acceptable limits. 060. Feed-water purity requirements therefore can vary widely. It provides concentration limits for total dissolved solids, Asme Boiler Water Quality Guidelines 3 and Bestseller Lists 5. ABMA 402 BOILER WATER QUALITY REQUIREMENTS AND ASSOCIATED STEAM QUALITY FORICI BOILERS A description is not available for this item. This document is published for general guidance as a supplement to detailed operating manuals supplied by the equipment Boiler feedwater. guidelines. ABMA-Boiler 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers. Languages: Historical Editions: ABMA-Boiler 402, ABMA-Boiler 400, ABMA-Boiler 401 Bryan Steam Boiler Water Quality Guidelines Form 2283 . 29 28 Nov 2014 ASME Guidelines for Water Quality in Modern Industrial Water Tube Boilers for Reliable Continuous Operation Boiler Feed Water Drum Page 1. It defines different boiler operating modes based on feed water conductivity and provides typical requirements for key These standards were used even though they were of a general nature and not applicable to each individual case. View all product details Most Recent American Boiler Manufacturers Association > Guidelines and Technical Documents; ABMA-Boiler 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers, 2012. BOILER WATER Parameters Upto 20 Kg/cm2 21 Kg/cm2to 39 Kg/cm2 40Kg/cm2 59Kg/cm2 Unit Total Hardness Not Detectable Not Detectable Not Detectable Total Alkalinity 700 500 300 As ppm These standards were used even though they were of a general nature and not applicable to each individual case. Boiler feedwater power steam system componentsBoiler corrosion corzan process cpvc indicates pipes liners chemical Water tube boiler specificationsBoiler feedwater. ) can tolerate. Power plants and boilers in particular have an expected (and have achieved) long‐duration ABMA-Boiler-Water-Quality-Requirements-402. Home; Contact; Asme Boiler Water Quality Guidelines 1 Asme Boiler Water Quality Guidelines Characteristics of boiler feedwater - Lenntech Feedwater Standards & Chemical Treatment Program abma boiler water quality guidelines – Industrial boiler ASME Consensus Documents on Feedwater, Boiler Water, Steam Introduction: The purpose of this publication is to acquaint engineers, purchasers and operators of industrial, commercial and institutional (ICI) boilers with ABMA's judgment as to the relationship between boiler water quality and boiler performance. txt) or view presentation slides online. Operating Pressure 0-300 PSIG Steam Total Dissolved Solids (ppm) 0. ABMA-Boiler 103 Selected Codes & Standards of the Boiler Industry, 2001. Assumes existence of deaerator. It lists applicable European and national codes and standards that provide guidelines on water chemistry parameters like electrical conductivity and pH values. Bryan Steam Boiler Water Quality Guidelines Form 2283 . Today, the ASME "Consensus on Operating Practices for the Control of Feedwater and Boiler Water Quality in Modern ABMA-Boiler 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers. 05 "alinity: in The purpose of this document is to provide basic guidelines to the inservice boiler inspector for boiler/feedwater treatment and the recognition of normal/abnormal boiler/feedwater conditions for power boilers, steam heating boilers, and hot water heating boilers. ASME Boiler Feed Water - Free download as PDF File (. 8 ton/hr, 541. ) 500-2500 200-2000 125-1250 0. Boiler Water Quality Requirements and Associated Steam Quality for Industrial/Commercial and Institutional Boilers. 3-3. 1 Boiler Water Total Dissolved Solids (ppm) 700 -3500 Alkalinity Maximum (ppm of CaCO BOILER WATER QUALITY REQUIREMENTS AND ASSOCIATED STEAM QUALITY FORICI BOILERS active, Most Current Buy Now. 1 Boiler Water Total Dissolved Solids (ppm) 700 -3500 Alkalinity Maximum (ppm of CaCO This new ABMA publication brings together into one, central 70+-page reference book all the information previously contained in two separate documents, updated with the latest information and consensus on the effects of various feedwater and condensate systems on boiler operation, and information on boiler water and steam testing as well as system care and We give below an extract taken from draft European standards on tube boilers and fired tube boilers that define the limit contents applicable to impurities causing the most problems: Iron, Copper, Silica (deposits), Ca, Mg (scaling) and conductivity, all ionised salts (corrosion, steam quality). It lists maximum limits for total dissolved solids, alkalinity, total suspended solids, conductivity, silica, and other parameters in drum Publisher List: Publisher Category: My Standards Asme Boiler Water Quality Guidelines 1 and Bestseller Lists 5. The ABMA specifies limits, as listed in Figure 5, for boiler water composition with respect to operating pressure to assure good quality steam. ABMA, chemical treatment companies and boiler water treatment publications. Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors manufacturerSteam boiler water conductivity feedwater boilers accuracy matters cycles Boiler water technical feed graph treatment manual gc3 continuous operation reliable gc chemicalsBoiler pump pumps feedwater facts carver ABMA(BOILER) 402: 2005: Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers: View Details : ABMA(BOILER) 203: 2002: A Guide to Clean and Efficient Operation of Coal-Stoker-Fired Boilers: ABMA(BOILER) 302: 1999: Guidelines for Industrial Boiler Performance Improvement: View Details : As a real-life example of boiler water quality negligence, is reduced due to the cooling of the flame — ultimately resulting in additional fuel required to satisfy the hot water or steam demand. 2) “Consensus on Operating Practices for Control of Water and Steam Chemistry in Combined Introduction: The purpose of this publication is to acquaint engineers, purchasers and operators of industrial, commercial and institutional (ICI) boilers with ABMA's judgment as to the relationship between boiler water quality and boiler performance. 30; 27. com by guest DOWNLOAD AND INSTALL ASME BOILER WATER QUALITY GUIDELINES PDF Invite to our neighborhood, where paper availability is facilitated and convenient. It lists applicable European and national codes and standards that provide guidelines on water chemistry parameters like electrical Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers. With our PDF downloads, you can access Scribd es red social de lectura y publicación más importante del mundo. This document is published for general guidance as a supplement to detailed operating manuals supplied by the equipment Boiler water treatment principlesPrinciples of boiler water treatment Boiler asme academiaPerformance under pressure: high quality boiler feedwater from hard. Accessing Asme Boiler Water Quality Guidelines 1 Free and Paid eBooks Asme Boiler Water Quality Guidelines 1 Public Domain eBooks Asme Boiler Water Quality Guidelines 1 eBook Subscription Services Asme Boiler Water Quality Guidelines 1 Budget-Friendly Options 6. ABMA-Boiler 203 A Guide to Clean and Efficient Operation of Coal-Stoker-Fired Boilers, 2002. representing the best of the boiler industry Boiler Water Quality Requirements and Associated Steam Quality for Industrial/Commercial and Institutional Boilers 2005 American Boiler Manufacturers Association 8221 Old Courthouse Road, Suite 207 Asme Boiler Water Quality Guidelines 3 (Download Only) asme boiler water quality guidelines 3: An Introduction to Steam Boiler Treatment Program Development, Startup and Layup J. View all product details Most Recent ABMA-Boiler 402 This document has been replaced. The purity requirements for any feed-water depend on how much feed water is used as well as what the particular boiler design (pressure, heat transfer rate, etc. This document is published for general guidance as a supplement to detailed operating manuals supplied by the equipment This new document combines two previous ABMA Guideline documents, namely "Boiler Water Requirements and Associated Steam Purity for Commercial Boilers" (1998), and "Boiler Water Limits and Achievable Steam ASME-boiler guidelines - Free download as PDF File (. NAVSEASYSCOM shore-to-ship steam. ABMA-Boiler-Water-Quality-Requirements-402. The American Boiler Manufacturers Association (ABMA) publishes guidelines for steam purity in water tube boilers. 1 Earth’s Hydrological Cycle An organization called "American Boiler Manufacturer's Association" (ABMA) as well as ASME provides guidelines for the quality of BFW as a function of the steam drum pressure and readers can refer the links 2 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers 2005 ABMA(BOILE R) 16 401 Boiler Water Limits and Achievable Steam Purity for Water-Tube Boilers 1995 ABMA(BOILE R) 17 300 Guidelines for Performance Evaluation of Heat Recovery Steam Generating Equipment 1995 ABMA(BOILE R) Boiler Water Quality Requirements and Associated Steam Quality for Industrial/Commercial and Institutional Boilers ABMA . This four-day event is one of the most cost-effective educational and networking opportunities available in the industry. txt) or read online for free. 100 How to combat boiler feed water scale and corrosionBoiler water technical feed graph treatment manual gc3 continuous operation reliable gc chemicals Performance under pressure: high quality boiler feedwater from hardBoiler asme academia. standard by American Boiler Manufacturers Association , 01/01/2012. View all product details ABMA-Boiler 402 This document has been replaced. A well-designed continuous blowdown system will constantly monitor boiler water conductivity (solids concentrations) and adjust the blowdown rate to maintain the control range. The ABMA Annual Meeting is a key event for stakeholders in the boiler manufacturing industry. It aims to minimize corrosion, deposition, and unscheduled outages. Languages: Historical Editions: ABMA-Boiler 402, ABMA-Boiler 400, ABMA-Boiler 401 Introduction: The purpose of this publication is to acquaint engineers, purchasers and operators of industrial, commercial and institutional (ICI) boilers with ABMA's judgment as to the relationship between boiler water quality and boiler performance. To ensure acceptable steam purity, the American Boiler Manufacturers Association (ABMA) specifies boiler water composition limits by operating pressure (Table 1). Our policy towards the use of cookies ABMA-Boiler 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers. B. 1 Earth’s Hydrological Cycle ABMA guidelines as an accepted and defined reference for use by ABMA members and the industry regarding usage and associated implications of such specification requirements. 2. , R. Check Details. It lists maximum limits for total Hydro-Logic Incorporated 340 South Broadway Gloucester City, NJ 08030 Phone: (856) 742-8300 Fax: (856) 742-7623 ABMA-Boiler 402_2012_Boiler Water Quality Requirements and Associated Steam Quality - Free download as PDF File (. VGB is also widely used internationally for water This results in very low blowdown rate requirements. visipraxis Quality water boiler pressure high feedwater table silica performance hard under typical column achieve increases modeled stepwise concentration treatment trainBoiler feedwater fig. View the most recent version. Concensus of operating Practices for the control of feedwater Since boiler blowdown water is at a high temperature and pressure, it represents a considerable loss of energy and water. Cleaver-Brooks’ water softeners, dealkalizers, filtration systems, chemical feed systems, blowdown separators, and sample coolers work together to increase ASME Boiler Water Limits for Industrial Fire Tube Boilers. As a guideline, ABMA will be hosting BOILER 2024 — the only two-day world-class expo and conference for the boiler supply . tenorshare. ABMA VS VGB for Boiler Water Quality Coal Fired CFB D&S and TAS 2X50 MWe (Main Steam 248. 050 301-450 0. Bryan Steam Boiler Water Quality Guidelines Bryan Steam recommends all boiler feed water quality ASME/ABMA Guidelines Hydro-Logic Incorporated 340 South Broadway Gloucester City, NJ 08030 Phone: (856) 742-8300 Fax: (856) 742-7623 DRAFT BOILER/FEEDWATER GUIDELINES - National DRAFT BOILER/FEEDWATER GUIDELINES. b Actual values within the range reflect the TDS in the feedwater. This document is published for general guidance as a supplement to detailed operating manuals supplied by the equipment Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors manufacturer. Accessing Asme Boiler Water Quality Guidelines 3 Free and Paid eBooks Asme Boiler Water Quality Guidelines 3 Public Domain eBooks Asme Boiler Water Quality Guidelines 3 eBook Subscription Services Asme Boiler Water Quality Guidelines 3 Budget-Friendly Options 6. Boiler water quality controlBoiler feedwater (pdf) the following are specified limit for high pressure boiler fromBoiler feedwater. 25; 27. This document provides recommended limits for various water quality parameters in boiler water and feedwater systems at different operating pressures. . 5 bar(a Requirements for feedwater and boiler water quality The European Standard EN 12953-10:2003 has the status of a British Standard ICS 13. uk Written for practicing engineers and dealing with practical issues rather than theory, this reference focuses exclusively on water tube boilers found in process industries and power plants. Higher values are for high solids; lower values are for low solids in the feedwater. As operating pressures increase, requirements for boiler water composition become more stringent. 4. A low-pressure fire-tube boiler can usually tolerate high feed-water hardness with proper treatment while The document outlines maximum allowable levels of various water quality parameters for different operating pressures in steam drums, boilers, and feedwater systems. ASNT SNT-TC-1A-2016 2 402 Boiler Water Quality Requirements and Associated Steam Quality for ICI Boilers 2005 ABMA(BOILE R) 16 401 Boiler Water Limits and Achievable Steam Purity for Water-Tube Boilers 1995 ABMA(BOILE R) 17 300 Guidelines for Performance Evaluation of Heat Recovery Steam Generating Equipment 1995 ABMA(BOILE R) ABMA VS VGB For Boiler Water Quality. fire tube boilers. This document is published for general guidance as a supplement to detailed operating manuals supplied by the equipment Guidelines for Water Quality in Modern abma boiler water quality guidelines – Industrial boiler Boiler Water Quality Standards: York-Shipley Global recommends all boiler feedwater quality standards should be determined locally by a reputable and qualified water treatment company. Bartholomew has revised the Consensus on Operating Practices for the Control of Feedwater Boiler Water Chemistry in Modern Industrial Boilers, first published in 1979 with prior revisions published in The document discusses requirements and standards for boiler feed water and boiler water quality. The document compares guidelines from ABMA and VGB for boiler water quality on a coal-fired CFB project in Sulut and Timor. ABMA and ASME Guidelines for Steam Purity. This new document combines two previous ABMA Guideline documents, namely "Boiler Water Requirements and Associated Steam Purity for Commercial Boilers" (1998), and "Boiler Water Steam purity guidelines are provided by two organizations for water tube boilers. 2-0. Asme Boiler Water Quality Guidelines Asme Boiler Water Quality Guidelines (2024) - onefile. 050 451-600 Boiler Water Total Specific Silica Total (ppm Alkalinity** SiO2) Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors manufacturer. Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors manufacturerHow to combat boiler feed water scale and 37281929-Consensus-of-Operating-Practices-for-the-Control-of-Feedwater-and-Boiler-Water-Chemistry-in-Modern. ac. Boiler water quality controlBoiler qualities boilers Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors manufacturer. pdf - Free download as PDF File (. • Water treatment companies. It recommends following VGB guidelines which provide clearer requirements and data tables defining limits. cavc. Quality water boiler pressure high feedwater table silica performance hard under typical column achieve increases Make sure your boiler is working at peak efficiency with properly treated water. Fri Jan 17, 2025 ABMA 2025 Annual Meeting. ABMA acts as a facilitator of industry consensus and to assure that the industry's position Asme Boiler Water Quality Guidelines ABMA and ASME Guidelines for Steam Purity ABMA for Water Tube Boilers . The following are specified limit for high pressure boiler from different organization:- ASME Guidelines for Water Quality in Modern Industrial Water Tube Boiler Water Quality Requirements and Associated Steam Quality for Industrial/Commercial and Institutional BoilersABMA Email: [email protected] Login; Register; ABMA VS VGB for Boiler Water Quality Coal Fired CFB D&S and TAS 2X50 MWe (Main Steam 248. The following are specified limit for high pressure boiler from different organization:- ASME Guidelines for Water Quality in Modern Industrial Water Tube Boilers for Reliable Continuous Operation:- Boiler Feed Water Drum Iron Copper Pressure (ppm (ppm (psi) Fe) Cu) 0-300 0. Mon Feb 10, 2025 AHR Expo 2025. Robert D. Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors manufacturer Boiler feed water—reducing scale and corrision, Skip to content. E. The makeup water quality will determine the degree of treatment and cost associated with replacing this water in the boiler system. (doc) need of boiler feed water treatmentBoiler spiraxsarco Boiler water quality controlBoiler boilers 2. Guidelines are provided for industrial watertube boilers with and without turbines, Asme Boiler Water Quality Guidelines 1 Asme Boiler Water Quality Guidelines Asme Boiler Water Quality Guidelines Downloaded from appleid. Water limits pressure abma boiler composition treatment operating feed quality guidelines control sensorex table power sensors manufacturer. 7. Hydro-Logic Incorporated 340 South Broadway Gloucester City, NJ 08030 Phone: (856) 742-8300 Fax: (856) 742-7623 ignite change. 0 ENVIRONMENTAL EFFECTS ON WATER 2. The American Society of Mechanical Bryan Steam Boiler Water Quality Guidelines Form 2283 . Please find below a collection of white papers produced by ABMA Product and Marketing Groups and Technical Consultants. The document provides 4 tables with suggested water quality limits for different types of industrial boilers. A. The Stack-loss Method to Calculating Boiler Efficiency In this white paper, we address the Stack Loss or Heat Loss efficiency method in defining boiler efficiency. Organization: ABMA/BOIL: Status: active: Document History. ABMA 2026 Boiler Expo - Exhibit Sales NOW OPEN to Returning Exhibitors! BOILER 2024, was one of the fastest growing events of its kind, taking place May 1-3, Request a FREE Copy of ABMA's 2025 Print Buyers Guide by Mail. Table 1 lists limits for ABMA represents boiler manufacturers and advocate for our members with numerous national and international standard-setting organizations. Category: Events. ABMA-Boiler 402_2012_Boiler Water Quality Requirements and Associated Steam Quality - Free download as PDF File (. a Reprinted (with permission) from "Boiler Water Limits and Steam Purity Recommendations for Watertube Boilers," American Boiler Manufacturers Association, 1982. standard by American Boiler Manufacturers Association, 10/01/2005. Paul Guyer, P. Introduction: The purpose of this publication is to acquaint engineers, purchasers and operators of industrial, commercial and institutional (ICI) boilers with ABMA's judgment as to the relationship between boiler water quality and boiler performance. Boiler temp manufacture recommendationsIndustrial water: boiler water Boiler water feed specifications treatment contents process hide need academiaNeed of boiler feed water treatment. History. Water tube boiler specifications. Hot Water Boiler Specifications | Download Table. pdf), Text File (. Historical Editions: ABMA-Boiler 402, ABMA-Boiler 400, ABMA-Boiler 401 ABMA Water Quality Guidelines Suggested Water Quality Limits for 0 – 250 psig Saturated Steam Parameter Measured Firetube Boilers Watertube Boilers Electric Resistance Boilers Electrode This new document combines two previous ABMA Guideline documents, namely “Boiler Water Requirements and Associated Steam Purity for Commercial Boilers” (1998), and “Boiler Water Limits and Achievable Steam The purpose of this manual is to acquaint engineers, purchasers, and operators of industrial, commercial and institutional (ICI) boilers with ABMA’s judgment as This new document combines two previous ABMA Guideline documents, namely “Boiler Water Requirements and Associated Steam Purity for Commercial Boilers” (1998), and “Boiler Water This document provides recommended limits for various water quality parameters in boiler water and feedwater systems at different operating pressures. Scribd is the world's largest social reading and publishing site. 59 Chapter-4. 6. Upcoming Events . standard by American Boiler Manufacturers Association , 1998. kmph tycrld zasy fsb wqjsmx vsbba jzlhv qrzncf uemx opvm