A simplified numerical simulation model is constructed for the purpose of studying the flow around the reed valve in the automotive air conditioning compressor. The Fluid-Structure Interactive Method is used. The model is investigated whether it is possible to know the difference of the valve performance in case of using the new rigidity or configuration. The constant coefficient is adapted to control the lubricant oil reaction force that acts at the occasion when the valve leaves from the contact surface of the seat. This work shows the benefit of the constant coefficient at the limited pressure conditions and the difference of the available conditions for the suction side and discharge.