Design and function of lesers new pilot operated safety valve modulate action version. Leser compact performance safety valves of type 459 are designed, marked, produced and approved according to the requirements of the following regulations. Heaton valves africa, as the sole agency holder for leser in africa, has at its disposal the latest leser product range, safety valve sizing and system design technology. Stockholding comprises a complete range of safety relief valves from 15mm through 300mm.
With almost 200 years of history, leser has manufactured its safety valves to reflect stateoftheart design and developed a product range to provide solutions for all sectors of industry. Safety relief valves series 437 series 459 compact performance catalog. Leser s expertise in stable safety valve function, combined with our commitment to high quality and reliability led to this new and innovative changeover valve. Leser sells, produces and develops safety valve for all industrial applications. Customer satisfaction is the impetus behind leser s progress. Leser safety valve test under cryogenic conditions youtube. Srv1 selection considerations consolidated safety relief valves general information srv1q4. Typical applications for leser high performance safety valves are. Leser is a headquartered in hamburggermany and maintains a stateoftheartfactory. Leser high performance safety valves are the ultimate solution for all industrial applications for steam, gas and liquid. Learn interesting facts and information on safety valves. Catalog flanged safety relief valves series 526 api esd uk ltd. Furthermore, all leser clean service safety valves are. Consolidated spring loaded safety relief valves 1900 srv1q4.
Safety relief valve 441, 442 ansi safety relief valve 441, 442 xxl 2 safety relief valve 441, 442 din 4 safety relief valve 444 ansi 6 leser original spare parts kits series 441, 442 dinansi 7 flange drillings series 441 8 flange facings series 441 9 safety relief valve series 457, 458 140 spare parts series 441 142. The core business is the safety of pressurized facilities. Leser safety valves for every industrial application product range series 526 type 526 high performance compact performance clean service h 2so 4 hno 3 nh 3. Leser safety valves for every industrial application product range series 546 type 546 type 5466 series 447 type 447 type 449 compact performance critical service critical api best availability clean service.
In this video you can see the test of a leser safety valve type 526 3l4 under cryogenic conditions. Chlorine production and processing chemical systems and pipelines reducing media such as acids e. Typical applications for leser critical service safety valves are. Engineering the technical manual leser the safety valve. In addition, leser india produces safety valves for the local market. Safety relief valves spring loaded contents chapterpage.
Air gas compressors and pumps technical gases and co. Leser usa leser safety relief valves product list advance. Pop action, flowing pilot operated safety relief valve 900 the consolidated 900 pilot operated safety relief valve series is designed to. Safety relief valve spring loaded 1, cast construction.
Leser usa leser safety relief valves type 447 advance. Furthermore, all leser api safety valves are designed, marked. The set pressure is adjusted by pretensioning this spring with the adjusting screw. Leser type 441 is suitable for almost any industrial application, and are worldwide one of the best selling springloaded flange type safety valves. Leser safety valves for every industrial application product range api high performance high efficiency clean service h 2 so 4 hno 3 nh 3 hcl critical service modulate action best availability series 437 type 437 type 438. Flanged safety relief valves integral cast support brackets for safe handling of the valves api and heavy safety valves. Flanged safety relief valves series 526 api the safety valve.
For heating plants up to 120 c and low pressure steam boilers up to 1 bar trd 721 requires safety valves with soft sealing and elastomer bellows to protect the. Pilot operated safety relief valve 4900 mpv the consolidated 4900 pilot operated safety relief valve is the first tubeless, modulating valve that provides exceptional performance and stable operation. We used liquid nitrogen to cool the valve down to 161 to. Flanged safety relief valves leser safety relief valves have been optimized, in close cooperation with plant engineers and service specialists, simplifying design with fewer components for less down time, fewer spare parts and lower maintenance costs. Eight subsidiaries in europe, the americas, the middle east, and asia, as well as authorized and trained representatives in over 80 countries guarantee competent consulting for all industrial applications. Since the 1970s leser has specialized only in safety valves. The ptfe bellow is gastight and backpressure compensated.
Safety valves for all industrial applications leser. The combination of a leser safety valve and bursting disc combines the advantages of both safety devices. Of these 1800 more than 320 are equipped with leser steam flushing system assuring no clogged situations of the outlet line and no condensation and erosion. Leser offers springloaded and pilotoperated safety valves for all industrial applications according to the pressure equipment directive and asme viii. Leser safety relief valves leser safety relief valves, proquip 4 mark rd. Flanged safety relief valves series 447 series 546 the safety valve. Furthermore, all leser compact performance safety valves are designed, marked.
Leser compact performance threaded safety relief valves leser. Safety relief valves spring loaded contents chapterpage materials available designs 0502 available designs materials 0503 how to order numbering system 0504 article numbers 0506 dimensions and weights metric units threaded connection 0508 flanged connection 0509 us units threaded connection 0510. Leser high performance flanged safety relief valves cvi solutions. Materials include cast iron, cast steel, chrome and stainless steel.
Flanged safety relief valves series 441 series xxl series 444 high performance catalog 1. Flanged steel pressure relief valves according to api 526 18 relief and safety relief valves with flanged connections 20 safety valves with threaded. Consolidated achieves this goal by offering the most efficient solution for any specific pressure relief valve application. Furthermore, all leser critical service safety valves are designed, marked. In the last 10 years leser, the safety valve company, from hamburg in germany has installed more than 1800 safety valves in urea plants located in almost all countries in the world. Leser is a mediumsized, familyowned company, backed up by almost 200 years of tradition. Leser compact performance threaded safety relief valves. Leser api safety valves the api product group represents full range of spring loaded safety valves acc. Leser safety relief valves have been optimized, in close cooperation with plant engineers and service specialists, simplifying design with fewer components for less down time, fewer spare parts and lower maintenance costs. Flanged safety relief valves spring loaded contents chapterpage materials. The safety valve on standby can be dismounted and serviced during ongoing operation of the system the protection of the system against excessive pressure remains guaranteed. Technical specifications type 459 nominal diameter inlet thread. In 1885 the company developed its first safety valve for the protection of steam boilers. Compared to standard full nozzle safety relief valves with high alloy trim, type 447 provides for a.
Air gas compressors and pumps technical gases and co 2 plants. Typical applications for leser compact performance safety valves are. Pressure relief valves and their operation there are two types of pressure relief valves. Integral cast support brackets for safe handling of the valves api and heavy safety valves. Flanged safety relief valves spring loaded for steam, gases, and liquids 4 type 441 ansi type 441 xxl leser. A pressure relief valve is used to release excess pressure from a system during overpressure situations thus avoiding catastrophic failure. So, a pressure relief valve is an important process safety device and widely used in chemical, petrochemical, power, and oil and gas industries. The leser digital id provides access to all digital information of a safety valve, quickly and directly on the valve. Since pressure relief valves are safety devices, there are many codes and. From recommendations for your oem or plant maintenance safety valve. Leser critical service relief valves cvi solutions. C, kenilworth, nj 07033 9732530100 is a leading sales representative distributor of process control products and services to the power, oil refining, industrial gases, chemical, food. 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. Engineering is the technical manual for safety valves from leser.
Kg at a glance en created by anonymous april 5, 2018 category. Leser safety relief valves are engineered to support global applications. During the valve operation, noise levels can exceed 85db. Safety valve with full ptfe lining for protection from highly corrosive media. The extensive collection offers you information for almost all areas around the safety valve and is aimed at both occasional and advanced users. Even at that early date, leser products were working for the safety of man and the environment. Leser usa leser safety relief valves type 441442 advance. Lined leser safety valves are used primarily in chemical, pharma ceutical, petrochemical and industrial process engineering.
Leser compact performance safety valves cover a large variety of types, materials. Safety valves pdf the primary purpose of a pressure relief valve is protec. Safety relief valve 441, 442 ansi 128 safety relief valve 441, 442 xxl safety relief valve 441, 442 din 2 safety relief valve 444 ansi 4 leser original spare parts kits series 441, 442 dinansi 5 flange drillings series 441 6 flange facings series 441 7 safety relief valve series 457, 458 8 spare parts series 441 140. Review our leser product line to find the best valve for your needs. All components of critical service safety valves are made with. Series 441 protection of chemical processes and equipment e. Leser valves safety relief valves heaton valves africa. Safety valves and their operation there are two types of safety valves.
Leser compact performance safety valves offer ultimate protection against unallowable overpressures in all applications for steam, gases and liquids where smaller capacities are required. Flanged safety relief valves spring loaded contents chapterpage materials conventional design 0102 balanced bellows design 0104 how to order numbering system 0106 article numbers 0108 dimensions metric units 0110 us units 0112 weights metric units 0114 us units 0115 orifice d t selection. Are designed to meet all industrial applications up to f orifice. Pressure relief valves for all industrial applications leser. Major companies in the chemical, oil and gas, petrochemical, energy, technical gases, lnglpg, pharmaceutical, food and beverage, shipbuilding and heating and air conditioning industries use. Safety valves for critical service conditions in chemical plants, critical service conditions and media may occur which place special demands on the design of safety valves, e. In a springloaded pressure relief valve, the closing force is generated by a helical spring. In a springloaded safety valve, the closing force is generated by a helical spring. C safety adjacent pipe work should be anchored to minimise pipe work forces acting on valve. Highly corrosive media highly toxic media high back pressure leser have developed three series of safety valves for these applications. Leser products find the right pressure relief valve for your applications in the wide range of leser products. Leser s critical service valves are spring loaded safety relief valves developed in close cooperation with plant engineers and service specialists to protect highly corrosive processes and installations against inadmissible overpressure. Technical specifications type 459 nominal diameter inlet thread 12 1 12 12 1 12.
Flanged steel pressure relief valves according to api 526 type 526 safety valves with threaded connections type 437,459462 safety valves for sanitaryclean service. Leser safety valves for every industrial application. Threaded safety relief valves spring loaded general 4 leser. The pressure relief valve prv is designed to open at a predefined set pressure. This movie shows a normal operation of a leser safety valve with back pressure. Leser have developed three series of safety valves for these applications. Leser valve and parts inventory heritage global partners. You will find detailed information on the following topics. Type flanged safety relief valves api series 526 4 leser. Sizing, pressure setting, and installation and maintenance. Compact performance api high efficiency clean service h 2 so 4 hno 3 nh 3 hcl critical service modulate action leser safety valves for every industrial application series 441 full nozzle type 441, 442 full nozzle din type 441, 442 full nozzle ansi high. Leser safety valves are developed for the international market at our headquarters in hamburg, germany and manufactured at our modern factory in hohenwestedt, germany. Germany 2 leser belongs to the leading manufacturers of safety.
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