Crosby jseries direct spring pressure relief valves series josejltjose product overview series jose and jltjose are the standard conventional relief valve designs for applications when the discharge is to the atmosphere or to a low pressure. In addition, you can watch maintenance videos for the pilot operated safety valve posv. Furthermore, all leser clean service safety valves are designed, marked. Browse the product range or make an online enquiry leser india, located in mumbai india, provides support and service. Leser usa leser safety relief valves product list advance. Leser sells, produces and develops safety valve for all industrial applications. Products we carry by valve type safety valve with flanged connections. High efficiency pilotoperated safety valve leser gmbh. The api product group represents full range of spring loaded safety valves acc. From recommendations for your oem or plant maintenance safety valve.
Typical applications for leser high performance safety valves are. Since reliability is directly related to the complexity of the device, it is important that. Leser products find the right safety valve for your applications in the wide range of leser products. Api series 526 compact performance high performance modulate action clean service high efficiency posv.
Full flanged safety valves with flanged connections safety valves from the high performance product group offer especially high capacity for their size. Safety valve a springloaded pressure relief valve actuated by the static pressure upstream of the valve and characterized by rapid opening or pop action. In case of fulllift characteristic the safety valve opens abruptly over the full lift and discharges the whole mass flow which is necessary to prevent further increase of the pressure. Relisafe hpsf high pressure sample filter relisafehpsf. With a large quantity of nominal diameters dn, pressure ranges and product options, they have proven themselves as. Safety valve with medium capacities and a large proportional opening range. The extensive collection offers you information for almost all areas around the safety valve and is aimed at both occasional and advanced users. Valves must only be used in a circuit protected by suitable equipment. American petroleum institute prv relief valve, safety valve, safety relief valve. General general information leser api safety valves the api product group represents 3 full range of spring loaded safety valves acc. Wide hex on valve nozzle provides clearance for easy installation. Their safety valves are developed for the international market at our headquarters in hamburg. Maintenance instructions of the manufacturer typically include critical dimensions of these.
Heaton valves africa uses lesers state of the art valve sizing software program valvestart for valve selection and has its own test rigs for valve setting and calibration. Wear safety glasses and gloves during any installation or operation of the valve. Safety relief valves, series 6000 kunkle valve, safety. Leser safety valves for every industrial application.
Relief valve a pressure relief valve characterized by gradual opening or closing generally proportional to the increase or decrease in pressure. Leser compact performance safety valves this product group stands for compact dimensions with high capacity relative to the safety valve size great variety of threaded and flanged connections wide pressure range leser. Leser high performance safety valve type 441 442 din. Safety valves according to api 526 with standardized capacities and dimensions. Set pressure the gauge pressure at which a safety al ei sby ndu op r t which a relief valve discharges a 1 long nb r ok est am fl iq d.
Leser recommends that maintenance and repair be carried out by a. Leser is a headquartered in hamburggermany and maintains a stateoftheartfactory. See the leser engineering manual for more information. Maintenance maintenance handbook for leser product group. We are currently seeking self motivated, talented individuals with a minimum of 5 years experience in valve applications. Engineering the technical manual from leser download. Your contact careers language german products industries. Safety relief valves, series 6000 kunkle valve, safety and. Flanged steel pressure relief valves according to api 526 type 526 safety valves with threaded connections type 437,459462 safety valves for sanitaryclean service type 483,484,485,488 safety valves for critical service conditions type 447 changeover valves type 310,311 posv pilot operated. Once a condition occurs that causes the pressure in a system or vessel to increase to a dangerous level, the pressure relief valve may be the only device remaining to prevent a catastrophic failure.
However, some of the older designs show potential for improvement in areas like external tubing, capacity and delivery times. With more than 800 employees, leser is the largest manufacturer of safety valves in europe an. With a large quantity of nominal diameters dn, pressure ranges and product options, they have proven themselves as a universal safety valve for many applications. Safety valves from leser india reliably protect industrial applications against overpressure. Download the file of the desired product group and find all the information in one pdf. Leser specialises in fast production and delivery of bespoke valves through its ontime round the clock order service. There are either manual as well as pneumatic lifting devices available. Maintenance the maintenance manual leser the safety valve. Compact performance catalog safety relief valves series 437 series 459. Safety valve maintenance pdf pressure andor vacuum relief valves are used on liquid storage tanks and.
Furthermore, all leser high performance safety valves are. Even at that early date, leser products were working for the safety of man and the environment. Leser api safety valves of type 526 are designed, marked, produced and approved according to the requirements of the following regulations. How to select the right clean service safety valve. Leser compact performance safety valves cover a large. A pressure relief valve is a safety device designed to protect a pressurized vessel or system during an over. Safety relief valves series 437 series 459 compact performance extended catalog. The spring3 is the key component ensuring the correct function of the safety valve. Safety relief valves series 437 series 459 relevant solutions.
Leser modulate action safety valves of type 431 433 are designed, marked, produced and approved. Maintenance the maintenance manual leser the safety. This design makes enables the lifting of the valve disk during pipe cleaning to clean all inner parts including seat area and oring. Leser is a mediumsized, familyowned company, backed up by almost 200 years of tradition.
All individual parts are manufactured on modern machining centres and cnc lathes 4. Pressure relief valve engineering handbook crosby valve inc. Leser modulate action safety valves can be used for all. Pressure relief valve engineering handbook chapter 2 terminology safety valve a pressure relief valve characterized by rapid opening or closing and normally used to relieve compressible fluids.
Learn interesting facts and information on safety valves. Series 441 protection of chemical processes and equipment e. Flanged safety valves with especially high capacity for their size. Type 447 changeover valves type 310,311 posv pilot operated safety valve. Leser compact performance safety valves of type 459 are designed, marked, produced and approved according to the requirements of the following regulations. Leser compact performance threaded safety relief valves. Safety valves from leser india for industrial applications. Leser high performance safety valves of type 441, 442 din are designed, marked, produced and approved according to the requirements of the following regulations. The series 433 standard safety relief valves have component. Safety valves of the varivent series have got gas sealed lifting devices of the valve disk. Leser safety valves are approved by a large number of authorities and classification societies e. In 1885 the company developed its first safety valve for the protection of steam boilers. Leser recommends that maintenance and repair be carried out by a larc leser authorized repair center.
Cryogenic burns can occur if the valve is handled during or after the valve has operated. Pdf forbes marshall safety relief valve fmsrv quick to. Applications features and benefits codes and standards. With a large quantity of valve sizes, pressure ranges and product options, they have proven themselves as. You will find detailed information on the following topics. The outlet side of the safety valve is open to atmospheric pressure. A large number of documents, such as catalogues, brochures or certificates, are available to you. Click on engineering and you will find all the information in one pdf. The core business is the safety of pressurized facilities. Their safety valves are used by leading companies in industries such as chemical, petrochemical, industrial gases, oil and gas production, and machine building, as well as the food and pharmaceutical industry.
Leser is the largest manufacturer of safety valves in europe and a market leader worldwide. Flanged safety valves, series 441442 and 441 xxl the safety valve. Kunkle series 6000 safety valves safety and relief products features oring seats available for exceptional leakfree performance, reduced maintenance cost, multiple cycles with tight shutoff and improved seating integrity. All relevant international standards are observed in its design and dimensioning. Leser high performance flanged safety relief valves cvi solutions. Call us tollfree 18008758716 contact us directly via email for specific quanties and questions regarding leser brand safety valves. Since the 1980s leser has been the number one supplier for safety valves in the world and strengthens this position each year.
Flanged safety relief valves spring loaded contents chapterpage materials. Back pressure the pressure that exists at the outlet of a pressure relief device as a result of the pressure in the discharge system. If you meet this brief we would be interested to hear from you. The valve should be inspected for wear as part of a regular system maintenance programme. A safety valve is normally used with compr sib lfud. With a large quantity of valve sizes, pressure ranges and product options, they have proven themselves as a universal safety valve for many applications. Leser high efficiency safety valves of type 811 are designed, marked, produced and approved according to the requirements of the following regulations. The nanotightness exceeds the requirements for func. The safety valve closes again after a defined pressure reduction. Leser currently has 7 different locations worldwide and continiues to expand its international presence in an effort to supports its growing customer base. Browse the product range or make an online enquiry leser india, located in mumbai. This ensures dimensional conformity and a high surface quality. Since the 1970s leser has specialized only in safety valves.
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