BJ45H保溫截止閥 保溫截止閥產品性能規(guī)范保溫截止閥適用于化工、化肥行業(yè)的管路上，夾套內涵入蒸汽能防止介質結晶。型號公稱壓力PN(MPa)試驗壓力適用溫度適用介質保溫套壓力(MPa)殼體密封BJ45W-25P2.53.752.75≤200硝酸類≤1.0BJ45W-40P4.06.04.4BJ45W-64P6.49.06.6BJ45W-25R2.53.752.75硝酸類BJ45W-40R……