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无锡煤机厂最近研制出了WAF系列安全阀,第一次较全面地提出了中、小流量安全阀的压力和流量参数,目前已有8个型号的产品,开启压力为33～50MPa,公称流量分10、32、63、100、125L/min五档。它的结构外形和联接尺寸与国内液压支架上使用的各类安全阀基本相同,因此不需要作任何修改就能与液控单向阀或单向锁组合使用。其结构为柱塞式,增加了辅助密封圈,一方面提高了密封圈的寿命,延长了阀的使用期限;另一方面克服了平面密封结构的安全阀长时间贮存后开启值不稳定的弊病。
Wuxi Coal Machinery Factory has recently developed a series of safety valves WAF, for the first time a more comprehensive proposition of the pressure flow and small flow valve safety parameters, there are currently eight models of products, the opening pressure of 33 ~ 50MPa, nominal Traffic points 10,32,63,100,125 L / min five files. Its structural shape and connection dimensions are basically the same as the types of safety valves used in domestic hydraulic brackets, so it can be used in combination with pilot operated check valves or one-way locks without any modification. The structure is a plunger type, an auxiliary sealing ring is added, which increases the service life of the sealing ring and prolongs the service life of the sealing ring. On the other hand, the utility model overcomes the defect that the safety valve of the planar sealing structure is unstable after being stored for a long time .