Berita

Berita

  • Company introduction

    Hebei Liyong Flowtech Co., Ltd. is a leading manufacturer and exporter of valves, fittings, flanges, pipes and other piping products. Our company is located in the North China Plain of China, which is rich in resources and rich in industrial heritage. We specialize in the manufacture of a wide ra...
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  • katup

    A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an...
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  • Bahan Pengecoran Katup

    Casting Materials of Valves ASTM Casting Materials Material ASTM Casting SPEC Service Carbon Steel ASTM A216 Grade WCB Non-corrosive applications including water, oil and gases at temperatures between -20°F (-30°C) and +800°F (+425°C) Low Temp Carbon Steel ASTM A352 Grade LCB Low temperatu...
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  • Penunjukan DIN lama dan baru

    Penunjukan DIN lama dan baru Selama bertahun-tahun, banyak standar DIN diintegrasikan ke dalam standar ISO, dan dengan demikian juga merupakan bagian dari standar EN. Dalam proses revisi standar Eropa, standar DIN serveral ditarik dan digantikan oleh DIN ISO EN dan DIN EN. Standar yang digunakan...
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  • Pengantar Aktuator Katup

    Pengantar Aktuator Katup Aktuator Katup Aktuator katup dipilih berdasarkan sejumlah faktor termasuk torsi yang diperlukan untuk mengoperasikan katup dan kebutuhan akan penggerak otomatis. Jenis aktuator termasuk roda tangan manual, tuas manual, motor listrik, pneumatik, solenoida, hidra...
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  • Standar dan Persyaratan Penandaan Generik untuk katup, fiting, flensa

    Generic Marking Standards and Requirements Component Identification The ASME B31.3 Code requires random examination of materials and components to ensure conformance to listed specifications and standards. B31.3 also requires these materials to be free from defects. Component standards and spec...
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  • Pengencangan Torsi untuk flensa

    Torque Tightening To obtain a leak-free flange connection, a proper gasket installation is needed, the bolts must be assign on the correct bolt tension, and the total bolt strength must be evenly divided over the whole flange face. With Torque Tightening (the application of preload to a fasten...
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  • Flensa Gasket & Baut

    Flanges Gaskets & Bolts Gaskets To realize a leak-free flange connection gaskets are necessary. Gaskets are compressible sheets or rings used to make a fluid-resistant seal between two surfaces. Gaskets are built to operate under extreme temperature and pressures and are available in a wide ...
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  • Finishing Wajah Flange

    Flange Face Finish Flange face finish The ASME B16.5 code requires that the flange face (raised face and flat face) has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal. A serrated finish, either concentric or spiral, is required wi...
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  • Wajah Flange

    Flange Faces What is a Flange face? Different types of flange faces are used as the contact surfaces to seat the sealing gasket material. ASME B16.5 and B16.47 define various types of flange facings, including the raised face, the large male and female facings which have identical dimensions to...
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  • Jenis Flensa

    Types of Flanges Flange types As already described before, the most used flange types ASME B16.5 are: Welding Neck, Slip On, Socket Weld, Lap Joint, Threaded and Blind flange. Below you will find a short description and definition of each type, completed with an detailed image. Most common flang...
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  • Kelas Tekanan Flensa

    Pressure Classes of Flanges Forged steel flanges ASME B16.5 are made in seven primary Pressure Classes: 150 300 400 600 900 1500 2500 The concept of flange ratings likes clearly. A Class 300 flange can handle more pressure than a Class 150 flange, because a Class 300 flange are co...
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