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郑州市豫建阀门厂研制、生产的P41H型快速排污阀,公称压力1.6、2.5、4.0MPa,公称通径DN25、40、50mm。这种快速排污阀采用西德GESTRA公司的技术并列入机械工业部新产品试制计划(项目编号8413001)。产品研制成功后,于1991年经河北省阀门质量监督检验站,按国标GB4981进行检验,测试,检测结果:温度和密封达到标准要求,阀门寿命4000次以上,达到一等品标准要求。该产品1992年6月由郑州市科委组织专家进行了鉴定,评定为先进的科学技术成果。鉴定意见是“该
Henan Yu Jian valve factory development, production of P41 H-type fast drain valve, the nominal pressure 1.6,2.5,4.0 MPa, nominal diameter DN25,40,50 mm. This quick blowdown valve uses GESTRA technology from West Germany and is included in the trial production plan for new products by the Ministry of Machinery Industry (Project No. 8413001). After the success of product development, in 1991 by the Hebei Provincial Valve Quality Supervision and Inspection Station, according to national standard GB4981 for testing, testing, test results: temperature and sealing to meet the standard requirements, valve life of more than 4000 times, to achieve first-class product standards. The product in June 1992 organized by Zhengzhou City Science and Technology Commission experts identified as advanced scientific and technological achievements. Appraisal opinion is ”the