HH46X微阻缓闭蝶式止回阀

H76对夹双辩蝶式止回阀

HX44X橡胶瓣止回阀

H42N天燃气立式止回阀

H64Y电站止回阀

H11Y、H14Y、H61Y、H64Y内螺纹锻钢止回阀、焊接式锻钢止回阀

H63H、H63Y、H63F101、H65H、H65Y高压角式止回阀

H41Y、H44Y锻钢法兰端止回阀

H44美标止回阀

H44旋启式法兰止回阀

H41Y、H44H法兰端自密封止回阀

H72对夹式高压止回阀