译文：

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原文：
A technical background: The existing valve in the valve body, valve cover and all components are intact case, the sealing surface is only a slight deformation or corrosion, the valve can not be used. Repair of these valves non-professional works not, it caused great waste. Therefore, using the valve unit of hope is: the valve seat, valve plate sealing surface is not easy deformation, corrosion-resistant, fragile sealing material can change. Valve plate with the sealing surface of the headstock there is friction or not to minimize friction. Second, the invention Objective: To solve the valve seat and valve plate sealing surface corrosion, or deformation, the valve plate and which can automatically compensate for pressure close the cover and the pressure between the valve and the valve plate self-balancing problem, to solve the soft sealing material damaged by the friction sealing surface, because it is sealed, the valve cover can be changed, greatly increase the service life of the valve. Third, practical range: diameter φ50-φ400mm, pressure 2.5-4.0MPa, less than 200 ℃ in a variety of room temperature liquids. 4, the technology program: the valve pairs of parallel gate valve, sealing the entrance way, entrance valve plate from sealed packages and unloading force composed of the main seal gate valve plate. Seal kits and unloading force valve plate synchronize mobile but not connected to the pipeline pressure to force through the discharge valve plate, leveling arm passed to the export side seat, which would greatly increase the binding force of the soft sealing surface. Valve plate outside the set of a corrosion-resistant rubber seal set. The soft sealing material in the hoist process, with the valve seat to maintain a certain distance, so that the soft sealing material in the absence of friction-free folding pressure environment. Seal sets of the pipeline transport of liquids and spool components within the isolation from the corrosive liquids and impurities blocking. This valve is very convenient to replace the sealing material, so life is 5 times higher than normal valve. Attachment: Another "three eccentric spherical sealing gate valve" and the "sleeve-type double-sided soft sealing gate valve" has to apply for patents. Three eccentric spherical sealing valve is a direct pipeline spherical soft and hard pairs of sealing valve with soft sealing materials can be changed, the resistance, long life characteristics. "Sleeve-type double-sided soft sealing gate valve" is to have special requirements for double-sided soft sealing gate valve. This valve also has a sealing material can be changed, long life characteristics.