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    AI Overview
    Line Blind by ONIS: Safe & Easy Pipe Blinding Operations
    A DN50 (2-inch) line blind valve is a compact, high-performance, 2-inch industrial valve used for absolute downstream, zero-leakage isolation. It features a spectacle plate (or "JoJo" disc) that can be easily shifted from open to closed by one person without removing pipe bolts, often in under 5 minutes. These valves are ideal for oil and gas, chemical, and tanker applications requiring safe, rapid segregation. 
    Key Features and Benefits 
    • Size: DN50 (2 inch / approx 50mm ID).
    • Isolation: Ensures 100% positive shutdown (no cross-contamination).
    • Operation: Quick-change operation, usually requiring no special tools or only minimal wrenching (e.g., Cam-Set or Stacey systems).
    • Structure: Available as solid steel or stainless steel flanged valves, designed to withstand hazardous, high-pressure environments.
    • Applications: Ideal for refineries, chemical plants, and marine services where maintenance requires complete line isolation.
    • Types: Available in manual, gear-operated, or hydraulic designs. 
    Common Standards and Materials 
    • Pressure Ratings: Typically conform to JIS 10K/16K/20K or ASME 150# - 900#.
    • Materials: Frequently constructed from carbon steel or stainless steel (1.4408, etc.).
    • Approvals: Some models hold DNV GL type approval for marine applications. 
    Maintenance and Safety 
    • Zero Leakage: Designed for zero leakage, eliminating the risks associated with traditional spectacle blinds.
    • Maintenance: Minimal maintenance, typically involving quarterly to yearly inspection of seals and lubrication of mechanisms.
    • Safety: Designed for rapid, operator-safe, one-person handling. 
    • ECON® Line blind valve Type: 1579 Stainless steel Flange - ERIKS
      Product documents. ... ECON® line blind valves guaranties 100% safety in three ways. ECON® line blind valves are specially designe...
      Eriks
    • DN50 CL150 High Temperature Cam-Slide Line Blind Valve ...
      DN50 CL150 High Temperature Cam-Slide Line Blind Valve Stainless Steel. Line blind valve is a kind of gate valve that cuts off gas...
      Dvsvalve
    • Stacey Line Blind Valve - SchuF
      The modern line blind valve “Stacey” ensures the total isolation of the downstream flow within a pipeline. ... It is an essential ...
      schuf.de
    Show all
    • ECON® Line blind valve Type: 1579 Stainless steel Flange - ERIKS
      Product documents. ... ECON® line blind valves guaranties 100% safety in three ways. ECON® line blind valves are specially designe...
      Eriks
    • DN50 CL150 High Temperature Cam-Slide Line Blind Valve ...
      DN50 CL150 High Temperature Cam-Slide Line Blind Valve Stainless Steel. Line blind valve is a kind of gate valve that cuts off gas...
      Dvsvalve
    • Stacey Line Blind Valve - SchuF
      The modern line blind valve “Stacey” ensures the total isolation of the downstream flow within a pipeline. ... It is an essential ...
      schuf.de
    • Industrial Line Blind Valves Manufacturer | Manual & Hydraulic ...
      A: Line blind valves require minimal routine maintenance. For manual and gear-operated models, inspect sealing surfaces and lubric...
      Dvsvalve
    • Cam-Set® & Stacey™ Line Blind Valves - SchuF
      The Cam-Set® is not only convenient but fast too. No bolts have to be loosened or removed – often a difficult job if the bolts are...
      schuf.de
    • Line Blind Flanged Valve | BFV-S1
      The Line Blind Flanged Valve (BFV-S1) is a DNV GL Type Approval Certified valve. It has the following features: * **Features** * S...
      ValWell Development Enterprise Co., Ltd.
    • Cam-Set® & Stacey™ Line Blind Valves - Bickel und Wolf
      All dimensions above are in mm for ASME class 150# unless otherwise stated. Alternative Cam-Set® models are available on request. ...
      Bickel und Wolf
    • Trunnion Mounted Ball Valve, DN50, PN100, A105, ISO 17292
      DN50 PN100 ball valve is made according to ISO 17292 standard. The valve body is made of ASTM A105. It has the structural characte...
      Dervos Valve
    • Valwell DNV-GL High-Performance Blind Flange Valve - Taiwantrade
      Mar 19, 2026 — A blind flange valve only matters when failure is not an option. * Complete fluid isolation. Designed to eliminate cross-contamina...
      Taiwantrade
    • DN 50 PN 40 Stainless Steel 1.4408 2-Way Compact Flanged Ball Valve
      2-Way compact DN 50 flanged ball valve made of stainless steel 1.4408 with PTFE sealings. The valve is suitable for water, oil, co...
      Tameson.com
    • The essential pipe size terminology guide - Plumbing Superstore
      In the DN system, the nominal diameter of the pipe is equal to the approximate inside diameter (ID) of the pipe in millimetres. He...
      Plumbing Superstore
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    Web results

    DN50 CL150 High Temperature Cam-Slide Line Blind ...


    Dvsvalve
    https://www.dvsvalve.com › Spectacle Blind Valve
    Dvsvalve
    https://www.dvsvalve.com › Spectacle Blind Valve
    High temperature cam-slide is a special type of line blind valve, which differs significantly from the regular blind flange valve in its high-temperature ...Read more
    DN50 Line Blind Valve from www.dvsvalve.com

    Line Blind Valves - SchuF


    schuf.de
    https://schuf.de › wp-content › uploads › 2024/02
    schuf.de
    https://schuf.de › wp-content › uploads › 2024/02
    PDF
    SchuF Fetterolf line blind valves lead to significant cost and time savings. In comparison to traditional smaller size line blinds to say twelve inches, the Cam ...Read more
    16 pages

    ECON® Line blind valve Type: 1579 Stainless steel Flange


    Eriks
    https://shop.eriks.nl › valves-and-actuators-line-blinds › l...
    Eriks
    https://shop.eriks.nl › valves-and-actuators-line-blinds › l...
    ECON® line blind valves are specially designed to separate pipelines and storage tanks for 100% (segregation). The excellent quality guaranties a safe, reliable ...Read more
    DN50 Line Blind Valve from shop.eriks.nl

    BV12OLV-14 Line Blind Valve | Safe Isolation for Pipeline ...


    engitechsglobal.com
    https://engitechsglobal.com › product › bv12olv-14-line-...
    engitechsglobal.com
    https://engitechsglobal.com › product › bv12olv-14-line-...
    The BV12OLV-14 Line Blind Valve provides quick, secure, and visible pipeline isolation for safe shutdown and maintenance in chemical processes.
    DN50 Line Blind Valve from engitechsglobal.com
    People also ask
    What does DN50 mean on a valve?
    In the DN system, the nominal diameter of the pipe is equal to the approximate inside diameter (ID) of the pipe in millimetres. Here are two common DN pipe sizes as an example: DN25 = A pipe with an approximate inside diameter of 25mm. DN50 = A pipe with an approximate inside diameter of 50mm.

    The essential pipe size terminology guide - Plumbing Superstore


    Plumbing Superstore
    https://www.plumbingsuperstore.co.uk › product-guides
    Plumbing Superstore
    https://www.plumbingsuperstore.co.uk › product-guides
    What is DN in valve size?
    DN stands for 'Diameter Nominal'. Put simply, it is a rough translation of mm from imperial sizes, assuming that an inch is 25mm. We refer to a 12″ flange as DN300, when in fact it is 304mm.

    What is DN? - Just Valves


    Just Valves
    https://www.justvalves.com.au › what-is-dn-when-referri...
    Just Valves
    https://www.justvalves.com.au › what-is-dn-when-referri...
    Is DN50 2 inch?
    The nominal diameter is 50 mm (2 inch) and is lug flange mounted to your system.

    DN50 (2 inch) PN16 (Max 6 bar) Lug Butterfly Valve GGG40-Stainless ste


    Tameson.co.uk
    https://tameson.co.uk › products › bfll-50-6-bbc-dn50-p...
    Tameson.co.uk
    https://tameson.co.uk › products › bfll-50-6-bbc-dn50-p...
    What is the pressure rating for the DN50 valve?
    2-Way compact DN 50 flanged ball valve made of stainless steel 1.4408 with PTFE sealings. The valve is suitable for water, oil, compressed air, fuels, solvents and aggressive media up to a maximum pressure of 40 bar or 580 psi.

    DN 50 PN 40 Stainless Steel 1.4408 2-Way Compact Flanged Ball Valve


    Tameson.com
    https://tameson.com › products › dn-50-pn-40-stainless-s...
    Tameson.com
    https://tameson.com › products › dn-50-pn-40-stainless-s...

    Web results

    Line Blind Flanged Valve | BFV-S1


    ValWell Development Enterprise Co., Ltd.
    https://www.valwell.com.tw › ... › Blind Flange Valve
    ValWell Development Enterprise Co., Ltd.
    https://www.valwell.com.tw › ... › Blind Flange Valve
    Cast body; Bi-directional; Full flow; DNV GL type approval Certified; Solid structure design, and very long service life; Easy to operate and reliable ...Read more
    DN50 Line Blind Valve from www.valwell.com.tw

    Line Blind Valve | PDF


    Scribd
    https://www.scribd.com › document › Line-Blind-Valve
    Scribd
    https://www.scribd.com › document › Line-Blind-Valve
    Over 200 SchuF Fetterolf line blind valves have Line blinds installed in and around coke oven often a difficult job if the bolts are rusted. been installed. The ...Read more
    DN50 Line Blind Valve from www.scribd.com
    5.0(1)

    Line Blind Valve


    Jinbin Valve
    https://www.jinbinvalve.com › line-blind-valve
    Jinbin Valve
    https://www.jinbinvalve.com › line-blind-valve
    Line Blind Valve - China Manufacturers, Suppliers, Factory · Electric operated blind line valve Goggle valve · pneumatic round louver damper valve for flue gas.Read more

    Trunnion Mounted Ball Valve, DN50, PN100, A105, ISO ...


    Dervos Valve
    https://www.dervosvalve.com › trunnion-mounted-ball-v...
    Dervos Valve
    https://www.dervosvalve.com › trunnion-mounted-ball-v...
    DN50 PN100 ball valve is made according to ISO 17292 standard. The valve body is made of ASTM A105. It has the structural characteristics of fixed ball.Read more
    Images
    DN50 CL150 High Temperature Cam-Slide Line Blind Valve ...
    DN50 CL150 High Temperature Cam-Slide Line Blind Valve ...
    Dervos Valves
    Industrial Line Blind Valves Manufacturer | Manual ...
    Industrial Line Blind Valves Manufacturer | Manual ...
    Dervos Valves
    ECON® Line blind valve Type: 1579 Stainless steel Flange
    ECON® Line blind valve Type: 1579 Stainless steel Flange
    ERIKS
    Line Blind by ONIS: Safe & Easy Pipe Blinding Operations
    Line Blind by ONIS: Safe & Easy Pipe Blinding Operations
    Onis Line Blind
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    Web results

    Blind Flange Valve


    Jinggong Valve Co., Ltd.
    https://jinggong.en.made-in-china.com › ... › Ball Valve
    Jinggong Valve Co., Ltd.
    https://jinggong.en.made-in-china.com › ... › Ball Valve
    DN50 Stainless Steel Stainless Steel Manual Flange-Threaded Heavy-Duty Ball Valve with Blind Nut and Chain. US$21-25. Manual Rotation 180° Cast Iron Blind ...Read more
    People also search for
    Dn50 line blind valve installation
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