Drygas seals dgs used in ultrahigh pressure gasreinjection systems are setting a new standard in offshore, deepwater applications. The shipment of dry gas standards without proper dangerous goods labeling is against the law. Intoximeters 108 lt 038 drygas standard 108 lt 038 drygas. Intoximeters leaders in breath alcohol testing since 1945.
Calibration systems evidential dry gas is offered in three sizes. For a more complete description of dry gas seal principles of operation, see shah 1988. Wet bath simulators require a power outlet and as such are less portable than dry gas. Our breath testers are known for exceptional quality, reliability and accuracy, and we are trusted around the globe by clients in over 90 countries. Case study on frequent failure of dry gas seals onepetro. Centrifugal compressor wet seals seal oil degassing and control. The intoximeters alcosensor iii is a handheld, 3 digit display, portable, preliminary screener instrument intended for use whenever a rapid onthespot breath alcohol measurement is required. For over 70 years, intoximeters has been the leading provider of breath alcohol testers. T certified traceable gas offers the highest quality evidential standard available. The liquid condensation conditions in the dry gas seal. Typical wet gas seal leakage ranges from 40 to 200 scfm for a beam type compressor.
Cobaseal the next level of separation seal eagleburgmann. Nov 24, 2015 dry gas is a very helpful fuel additive that is used to remove water from gasoline and prevent watercontaminated gasoline from freezing. Buying calibration gas from cmi will help you to ensure the most accurate and reliable performance from your devices. The product for the most challenging and hostile environments with proven and independently audited performance to 425 barg. There are two basic types of gas seal systems differential pressure d p control and flow control. We are the leadingedge service provider for dry gas seal retrofits, high end compressor seal troubleshooting, seal support engineering and world class gas conditioning systems. Inboard of the dry gas seal is an inner labyrinth seal, which separates the process gas from the gas seal. The simplest seal is a dry gas seal in single arrangement. This seal is used in case that due to the nature of the product gas no additional back up seal is required. A dry gas seal is a mechanical seal that uses a sealing gas to create a barrier between the process gas and the atmosphere. These gas seal systems are normally supplied by the compressor oem mounted adjacent to the compressor. Dry gas seal systems for centrifugal compressors page 2 of. You need only retain one copy of the certificate of analysis for each lot. This dry gas cylinder can be used with all intoximeters instruments.
John crane gas sealsgas seals and their application for maximum reliability 2. The outboard labyrinth reduces warm seal gas leakage to the process side. View online or download intoximeters alcosensor fst operators manual. Dry gas seals dgs used in ultrahigh pressure gas reinjection systems are setting a new standard in offshore, deepwater applications. Gcs founded on january 1st, 2017, was previously a business unit within midwest pressure systems, inc.
Type 28exp dry gas seals john crane mechanical seals. Aug 02, 2017 dry gas seals are an integral part of modern centrifugal compressors. In case of the existing compressor equips oil film seal, seal oil console shall be replaced with dry gas seal control system. Dgs application rangejohn crane dgsoperating range temp. The liquid condensation conditions in the dry gas seal system. Here youll find everything you need for your breath alcohol testing program. Most of these gas tanks hold enough gas for hundreds of accuracy checks and have a shelf life of up to two years. When you buy calibration gas from cmi, you can be assured of a nhtsa approved, quality product, along with cmis outstanding customer service, instock selection, and delivery when you need it. This is an honorable mention for the independence and national production and confidence of. If there is some liquid in the seal gas, the dry gas seal will rapidly fail. Intoximeters 108 lt 038 drygas standard manufacturer.
The pros and cons of dry gas seals installation in an. Nor is there anything resembling the proposition that the intoxilyzer 5000 will not work if it does not infringe, or in other words, does not use an extruded aluminum cell. The universal gas seal for centrifugal compressors. Is the full control system included and adequately described in these writeups. When the seal gas flows through the filters, valves, orifices, seal faces and so on, the gas temperature will. Dry gas seals are noncontacting, dryrunning, mechanical face seals comprising a rotating mat ing ring and a stationary primary ring. Intoximeters recommends that external accuracy checks and calibrations be performed using either a dry gas or wet bath standard approved for use by both nhtsa and intoximeters. Jan 06, 2016 dry seal gas in dqr wet gas compressor vendor document 10. The seal gas may come from the compressor discharge or from others sources of clean and dry gas, and is injected with a pressure about 10 psi above the process gas pressure.
These must not be in the instruments when they are returned to us for service. The advantages of dry gas seals over wet seal systems can be defined as follows. The information found in dry gas seals handbook will help you make informed decisions regarding the application, operation, and maintenance of dry gas seals. Intoximeters 108 lt 038 drygas standard 108 lt 038. This book presents a complete guide to the technology, from the principle of gas seal operation to lessons learned from actual field experience. Dry gas seal systems for centrifugal compressors page 2. Staubus, pharmd, phd october 22, 2010 tacdl seminar tunica, ms principles of ecir detection one of the basic principles of analytical chemistry is that the analysis of a substance should be confirmed by an independent, alternative method. This i s done by measuring the pressure or flow across a. Dry gas seal systems the use of dry gas seals requires a system designed to supply sealing gas to the seal as a sealing and working fluid for the running gap. The dry gas tanks you purchase from intoximeters are considered hazardous materials for shipping purposes because the contents of the cylinders are pressurized. Type 28 compressor dry running gas seals have been the industry standard since early 1970 for gas handling turbomachinery. Centrifugal compressor wet seals seal oil degassing and.
Each state has its own regulations about the disposal of these aluminum cylinders. Dry gas seal arrangement typical dry gas seal seal face of dry gas theory of noncontact lift off of stationary ring achieved by increased pressure at the taper. A sealing gas is injected into the seal, providing the working fluid for the running gap and the seal between the atmosphere or flare system and the compressor internal process gas. Repair lead time is approx 6 8 weeks upon completion of drawings and necessary requirements from the customer. Inadequate fuel gas pressure during start up typical conditions on inboardoutboard seal will include running. Intoximeters recommends that external accuracy checks and calibrations be performed using either a dry gas standard or wet bath simulator approved for.
All seals will be provided with a twelve12months warranty against workmanship and material defects only. Intoximeters recommends that external accuracy checks and calibrations be performed using either a dry gas or wet bath standard approved for use by both. Common dry gas seal failures are discussed below along with their causes and remedies. Koosha turbo compressor company was succeeded to design and manufacture dry gas seal test machine. The recommended technique of evaluation of the c ondition of the dry gas seal is by monit oring the gas seal leakage through the primary vent. Intoximeters recommends that external accuracy checks and calibrations be performed using either a dry gas standard or wet bath simulator approved for use by both the national highway traffic safety administration nhtsa and intoximeters. Mechanical seals compressor seals gaslubricated seals.
Dry gas seal arrangement typical dry gas seal seal face of dry gas theory of noncontact lift off of stationary ring achieved by increased pressure at the taper portion. Intoximeters recommends that for all evidential grade breath alcohol analyzers, external accuracy checks and calibrations be performed using a nist traceable dry gas or wet bath standard approved for use by both nhtsa and intoximeters. Wet bath simulators should be used with properly certified and maintained ethanol solutions. We have 3 intoximeters alcosensor fst manuals available for free pdf download. Inadequate fuel gas pressure during start up typical conditions on. Now offering roadside drug testing for law enforcement. Intoximeters dry gas standard tanks, empty, 2 pieces. Jun 28, 2016 one of several dry gas seal testers we have built. Dry gas standards florida department of law enforcement. Most workplace alcohol testing programs use evidential quality ethanol gas standards.
Alternative solution sealoilgas separation and recoveryuse simple process of separating sealoil and entrained gas with the gas routed to recovery andor use. Type 28 compressor dryrunning gas seals have been the industry standard since early 1970 for gashandling turbomachinery. Get a great deal with this online auction for gas tanks presented by property room on behalf of a law enforcement or public agency client. Safety data sheet specialty gas equipment mesa gas. By comparison, expected losses from dry seals can be seen in exhibit 3, a performance chart provided by a dry seal vendor. Dgs, the correct operation of the sealing system is. Dry gas is most commonly used for calibration since it is both economical, convenient and portable for field use. Intoximeters 108 liter dry gas tank 038 davtech analytical. This instructorled 4day course introduces the principles of dry gas seals and seal support systems for centrifugal compressors, including dry gas seal installation, operation and maintenance. The dry gas seal performs the principal sealing function, while the carbon ring seal protects the dry gas seal against bearing oil contamination and guards against. This particular unit is installed in japan and can spin a set of dry gas compressor seals at speeds up to 30,000 rpm while pressurizing them up. Calibration gas cmi intoxilyzer breath alcohol testers. Intoximeters has been the leader in breath alcohol testing since 1945.
The principles of operation of dry gas seal faces, the methods of seal gas control, slow roll and challenging sealing environments. Contamination is one of the leading causes of dry gas seal failure. Dry gas tank for use with intoximeters instruments 108l. Dry gas cannot be transported by plane in your luggage or carryon. Drygas mechanical seals set a new standard in deepwater.
It is a very common practice to use seal gas tapped from the compressors discharge. Dry gas seal is often used as the seal devices in centrifugal compressor and other highspeed rotating equipment, which requires seal gas clean and dry. Intoximeters 108 liter dry gas tank 082 davtech analytical. Specifying engineers sometimes do not give enough attention to the scope, definition and selection of the most appropriate gas seal type, its control system and auxiliaries for a given service application. Apr 15, 2008 the recommended technique of evaluation of the c ondition of the dry gas seal is by monit oring the gas seal leakage through the primary vent. Introduction to the intoximeters ecir ii machine alfred e. When you come to alcohol standards in the accuracy check section you must complete both the intoximeters approved dry gas tank section and the intoximeters approved wet bath simulator section, even though north dakota operators do not use wet bath simulators. Water should never be in the gas tank, fuel lines, fuel injectors, or combustion chamber. The instrument is easy to use and rugged enough to withstand vigorous field conditions and accurate enough to be considered an evidential testing device. Advances in dry gas seal technology for compressors. It can also damage the regulator and the instrument if the shipment is subject to rough handling during shipping. The leading manufacturer of dry gas seal boosters gas compression systems, inc. Outboard of the dry gas seal is a barrier seal, which separates the gas seal from the compressor shaft bearings fig.
Field applications of dry gas seal designs were completed in 1952. Dry gas seal systems for centrifugal compressors page 3 of 5. The nde primary vent high pressure indicated the high leakage of the dry gas seal. In all cases, the tanks must be empty prior to disposal. Recovery system that separates gas from the exiting sealoil before routing to the degassing tank recovered gas sent to various outlets. Foreign materials, either solid or liquid, passing into the thin seal running gap between the rotating and stationary rings can lead to degradation of seal performance, reduced reliability and eventual seal failure.
Compressor was stopped and performed static test with low pressure nitrogen to confirm the nde seal health condition before change out as the last dry gas seal was changed one year back due to the same problem. This chart shows an example of one type of tandem seal with leak rates ranging between 0. Dry gas is a very helpful fuel additive that is used to remove water from gasoline and prevent watercontaminated gasoline from freezing. A convergence of technologies and experience from the trusted names in gas seal and system manufacture, application, and retrofitting, our heritage durametallic. While the solution itself is actually called dry gas, there is one brand of this fluid named drygas. Learning is through an effective blend of classroom theory sessions and practical, handson activities. The original patent was for kaydons tapered ramp lift geometry, a constant diameter variable depth dynamic lift design. Intoximeters 22006001 this product was recently added by customer request, and is available for your convenience. Ethanol gas calibration standards have several different names.
Aug 02, 2017 a continuous supply of the seal gas at steadystate conditions is essential to proper functioning of the dry gas seal. Contact intoximeters before returning a dry gas standard. All test rig parts custom made to suit the dry gas seal cartridge are included in the repair price. These mechanical seals are being installed on compressors at the tupi 4 floating production site in the lula field in. Also, some modifications are required for the existing rotor and casing. Dry gas seals are an integral part of modern centrifugal compressors. Intoximeters gear at galls, the public safety authority. The turboexpander dry gas seal consists of the conventional dry gas seal mating ring and primary ring, an outboard labyrinth, an inboard labyrinth, and the cavity to be vented, if desired. A continuous supply of the seal gas at steadystate conditions is essential to proper functioning of the dry gas seal. The seal gas supply pressure should be at least 50 psi 3. Each dry gas standard cylinder is accompanied by a copy of the certificate of analysis for that lot. The application of dry gas seal system is recommended.
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