An IV solution delivery system (10) for intravenous administration of a hazardous solution, the system comprising: a drip chamber (40) configured to be connected to a fluid reservoir (12), the drip chamber (40) has a drip chamber outlet (48) and a first membrane (66) placed in the drip chamber outlet (48), the first membrane (66) allows fluid containing a dangerous solution to flow out of the drip chamber ( 40) with a first rate； a patient conduit (50) having a first end that couples to the drip chamber (40) and a second end (54) that is configured to connect to an intravenous device such that fluid flowing from the delivery chamber drip (40) passes through patient line (50) and intravenous device (102) and to a patient (100)； a second membrane (158) placed at the second end (54) of the patient conduit (50), the second membrane (158) has a pore size configured to allow the passage of air at a second rate but prevents the passage of particles sprayed from the hazardous solution, and a valve selectively coupled to the second end (54) of the patient line (50), the second membrane (158) forms a part of the valve, characterized in that the valve further comprises predisposing means ( 152) that predispose the second membrane (158) to a closed position to prevent the passage of the fluid containing the dangerous solution through the valve, where the predisposing means (152) and the second membrane (158) are housed in an internal cavity (140) further comprising a second end portion having a stepped surface (144) supporting predisposing means (152), and the second membrane (158) and predisposing means (152) being positioned interposed between a retention ridge (142) and the stepped surface (144) within cavity (140), where the predisposing means (152) are configured to place the second membrane (158) against the retention ridge ( 142) to form a seal (154) between the second membrane (158) and the retention ridge (142), and where when a luer device (170) is attached to the val
