SL6PB1-6X/SL6PB1-6X/V德国力士乐单向阀现货SV15GB2-4X/SV15GB2-4X/VSV15GB3-4X/SV15GB3-4X/VSV15GB4-4X/SV15GB4-4X/VSV20GA1-4X/VSV20GA2-4X/SV20GA3-4X/SV20GA4-4X/SV20GA4-4X/VSV20GB1-4X/SV20GB1-4X/VSV20GB2-4X/SV20GB3-4X/SV20GB4-4X/SV20GB4-4X/VSL6PB1-6X/SL6PB1-6X/V德国力士乐单向阀现货引起阀瓣打碎的原因止回阀前后介质压力处于接***衡而又互相“拉锯”的状态，阀瓣经常与阀座拍打，某些脆性材料（如铸铁、黄铜等）做成的阀瓣就被打碎。预防的办法是采用阀瓣为韧性材料的止回阀。介质倒流的原因①密封面***；②夹入杂质。修复密封面和清洗杂质，就能防止倒流。SV20PA1-4X/VSV20PA2-4X/SV20PA2-4X/VSV20PA3-4X/SV20PA3-4X/VSV20PA4-4X/SV20PA4-4X/VSV20PB1-4X/SV20PB1-4X/VSV20PB2-4X/SV20PB2-4X/VSV20PB3-4X/SV20PB4-4X/SL6PB1-6X/SL6PB1-6X/V德国力士乐单向阀现货SV25GA1-4X/VSV25GA2-4X/SV25GA2-4X/VSV25GA3-4X/SV25GA4-4X/SV25GB1-4X/SV25GB1-4X/VSV25GB2-4X/SV25GB2-4X/VSV25GB3-4X/SV25GB3-4X/VSL6PB1-6X/SL6PB1-6X/V德国力士乐单向阀现货SV30GA1-4X/VSV30GA2-4X/SV30GA2-4X/VSV30GA3-4X/SV30GA4-4X/SV30GB1-4X/SV30GB2-4X/SV30GB2-4X/VSV30GB3-4X/SV30GB4-4X/SL6PB1-6X/SL6PB1-6X/V德国力士乐单向阀现货)