1Y-40P-DN80,H41Y-40P-DN100,H41Y-40P-DN125,H41Y-40P-DN150,H41Y-40P-DN200,H41Y-64P-DN15,H41Y-64P-DN20,H41Y-64P-DN25,
H41Y-64P-DN32,H41Y-64P-DN40,H41Y-64P-DN50,H41Y-64P-DN65,H41Y-64P-DN80,H41Y-64P-DN100,H41Y-64P-DN125,H41Y-64P-DN150,H41Y-64P-DN200,H41Y-100P-DN15,
H41Y-100P-DN20,H41Y-100P-DN25,H41Y-100P-DN32,H41Y-100P-DN40,H41Y-100P-DN50,H41Y-100P-DN65,H41Y-100P-DN80,H41Y-100P-DN100,H41Y-100P-DN125,
H41Y-100P-DN150,H41Y-100P-DN200,
止回阀：止回阀又称单向阀或逆止阀，其作用是防止管路中的介质倒流。