摘要 |
<p>A dispensing valve (3) provided in a chemical dispenser (5) for dispensing predetermined amounts of chemical into a lavatory cistern (3) is disclosed. The dispensing valve (9) seals an opening (43) in and dispenses liquid from the dispenser (5), the valve having a chamber (17) movable through the opening (43) between a filling position in which the chamber (17) is fillable with chemical from the dispenser (5) and a discharge position in which chemical held in the chamber (17) may be discharged, the chamber (17) being provided with surfaces sealing the opening in both said positions and further having an adjustable filling volume.</p> |