| 摘要 |
A flapper valve assembly including an adapter member and a flapper valve member. The adapter member includes a collar portion, a pair of trunions projecting radially outwardly from diametrically opposed locations on the collar portion, and a mounting portion extending rearwardly from the collar portion and defining an elongated slot. The flapper valve member includes a sealing disc for sealing coaction with the valve seat of the outlet passage of the tank, a float bowl extending integrally and centrally downwardly from the sealing disc for positioning within the outlet passage, and a pair of arms extending rearwardly from the sealing disc and including mounting apertures sized to button over the trunions on the adapter member to mount the valve member for pivotal movement on the adapter member between opened and closed positions relative to the valve seat of the outlet passage. In installations including a separate overflow pipe without integral mounting trunions or ears, the collar portion of the adapter member is slid over the overflow pipe and the flapper valve member is pivoted to the trunions of the adapter member. In installations including a separate overflow pipe having integral ears or trunions, the adapter member is dispensed with and the flapper valve member is pivoted directly to the existing ears on the overflow pipe. In installations having an overflow water passage built into a side wall of the tank, the mounting portion of the adapter member is directly mounted to a post upstanding from the base of the water tank and the flapper valve member is pivoted to the adapter member.
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