Double Flange Limit Retractor Pressure 1.0 /1.6 Mpa Water Conservancy Valve

Introduction

The double flange limit expansion joint is composed of body, sealing ring, gland, expansion short pipe and other main components. On the basis of the original performance of the loose expansion joint, a limit device is added, and the maximum expansion is locked with double nuts. The pipeline can expand freely in the allowable expansion amount. Once it exceeds its maximum expansion amount, it will play a limit to ensure the safe operation of the pipeline. It is especially suitable for the connection in the pipeline with vibration or certain inclination and turning.

Installation of double flange limit expansion joint

The double flange limit expansion joint is applicable to the connection between both sides of the product and the flange. During installation, adjust the connection length between both ends of the product and the flange, tighten the gland bolts diagonally and evenly, and then adjust the limit nut, so that the pipeline can expand freely within the range of expansion and contraction, lock the expansion and contraction, and ensure the safe operation of the pipeline. It is applicable to the pipes connected with flanges on both sides. During installation, adjust the installation length between the two ends of the product and the flange, raise funds diagonally and tighten the gland bolts evenly to make them as a whole with a certain displacement, which is convenient for adjustment according to the on-site size during installation and maintenance. During operation, the anti axial thrust can be transmitted to the whole pipeline. It can reduce the pressure thrust (blind plate force) of the connected parts and compensate the installation error of the pipeline. The double flange force transmission joint can not absorb the axial displacement. Double flange force transmission joint is mainly used for loose connection of pump, valve and other accessories.

Main part and materials

Yuanda Valve Group Co., Ltd., founded in 1994, is headquartered in Yincun, Longyao, Hebei, China, the hinterland of Bohai Economic Rim surrounding Beijing and Tianjin. With a registered capital of RMB 200 million, Yuanda currently has 8 subsidiaries, of which 6 are in China and 2 overseas. Among them, the core company, which covers an area of 540,000m2 and has more than 3500 employees, is the largest high,midium and low-pressure valve manufacturing base specializing in valve development, manufacturing, and sales in China.

Yuanda has obtained DNV·GL, ISO9001: 2015、ISO14001:2015、OHSAS18001:2007, API6D（6D-0759）, CE, KS, and EAC certifications. Its""trademark is evaluated as Famous Trademark of China and Famous Brand in Hebei Province, and the product series produced under"" is a trademark registered in Korea and products produced under this trademark enjoy a good reputation in both international and domestic markets. Yuanda has been named “Credit Management AA-Rating Enterprise” by the General Administration of Quality Supervision, Inspection and Quarantine and granted the title of “China Quality Trustworthy Enterprise” by China Entry and Exit Inspection and Quarantine Association. It is also a holder of Manufacture License of Special Equipment Level A and Casting Certificates Grades B, B1, and B2, and a member of China Valve Association council, a corporate member of China Foundry Association, and a provincial enterprise technology center in Hebei. Yuanda has been granted the power to carry out import and export operations on its own and is an approved supplier of PetroChina (CNPC) and Sinopec, Guodian, Huaneng, Huadian, Datang and China Power, and China Aluminum, CCESCC, Shougang, Wuhan Iron and Steel Company, and Hebei Iron and Steel Company.

Yuanda manufactures to standards including GB/JB(china), ANSI, API, AWWA, DIN, BS, JIS, EAC, NF and so on, and uses HT200, HT250, QT400, QT450, WCA, WCB, WCC, CF3, CF8, CF3M, CF8M, 1Cr5Mo, LCB, among others, to produce a great variety of valves including gate valves, globe valves, ball valves, butterfly valves, check valves, diaphragm valves, pressure-relief valves, plug valves, and traps, which are available in 12 main categories, 200 series and 4000 specs, totaling 120,000 tons a year. These products are widely used in all civil sectors covering petroleum, petrochemical, chemical, power generation, metallurgy, water system, pharmaceuticals, urban construction, and water supply and drainage.