译文：
减压阀属于自动阀类，高压氧舱气源压力高于0.8 MPa时应设置减压阀。减压阀借助压缩空气自身的能量，使其出口压力自动保持稳定。 结构：高压氧舱气源减压阀多采用活塞式减压阀，其结构如图4－7所示。主要由阀体、阀盖、活塞、弹簧、主阀、副阀及膜片等组成。 工作原理：减压工作原理是利用膜片、弹簧和活塞等敏感元件，改变阀芯与阀座的间隙来达到自动减压的目的。在阀体的下部装有主阀弹簧以支承主阀阀芯，使之与阀座处于密封状态。其下部端盖上的螺塞，是用来排放阀中的积液。在阀体上部的气缸中有气缸盘、气缸套、活塞和活塞环。气缸盘中间的导向孔与主阀阀杆配合，活塞顶在主阀阀杆上，当活塞受到介质压力以后，通过主阀阀杆推动生间阀芯下移，使主阀开启。阀盖内装有副阀的弹簧、阀芯和阀座，在阀芯上覆有不锈钢膜片。帽盖内装有调节弹簧、调节螺杆及锁紧螺母。

“ Valve structure and working principle ”是由提供的国际阀门新闻，译文仅供参考。另外，中国减压阀网还提供相关产品搜索：、、、、等。

原文：
Valves are automatic valves, high pressure oxygen chamber gas supply pressure is higher than 0.8 MPa pressure reducing valve should be set up. Valve with compressed air its own energy, so that it automatically outlet pressure remained stable. Structure: high-pressure oxygen chamber to use more gas supply valve piston valve, its structure as shown in Figure 4-7. Mainly by the valve body, valve cover, piston, spring, main valve, valve and membrane composed of the Deputy. How it works: decompression works is the use of diaphragm, spring and piston and other sensitive components, to change the valve core and valve seat of the gap to achieve the automatic decompression purposes. In the lower part of body with the main valve spring to supporting the main valve spool, so that with the valve seat in a sealed condition. Its lower end cap on the drain plug is used to discharge valve in the fluid. In the upper part of the cylinder valve plate in a cylinder, cylinder sleeve, piston and piston rings. Middle of the plate cylinder with the main valve stem guide hole with the piston top in the main valve stem, when the piston by the medium pressure after the promotion of health through the main valve stem between the spool down, so that the main valve is open. Built-in valve cover, Deputy valve springs, valve core and valve seat, in the stainless steel diaphragm overlying spool. Built-cap the adjustment springs, adjustment screw and locking nut.