| 摘要 |
<p>PURPOSE: To realize a repairing and an exchange for a short time by constituting a module unit by disposing a check valve member and a safety valve member one behind the other one in axial alignment in a support body member and attachably/detachably inserting it to a housing of a control valve assembly. CONSTITUTION: A check valve 3 is inserted to a support body member 20 from a lower side and a safety valve 5 is inserted to the support body member 20 from an upper side to constitute a module unit in which both valves 3, 5 are axially aligned. The unit is mounted to a housing 1 of a control valve assembly by a thread-engagement of a thread rid. The housing 1 is connected to a pure water-introduction tube 6 by a union joint 9 and is connected to a boiler by a union joint 8. In the housing 1, a first orifice 46 is formed between inlet and outlet chambers 13, 14 and a second orifice 47 is formed between the outlet and back flow chambers 14, 15 respectively. The first orifice 46 is closed by the check valve 3 and the second orifice 47 is closed by the safety valve 5.</p> |
