发明名称 |
BACKFLOW PREVENTER AND TEST COCK ASSEMBLY |
摘要 |
<p>A backflow prevention test assembly for a backflow preventer has a test valve in fluid communication with a conduit of the backflow preventer and a test kit. The test valve has a body defining an axial bore, and a piston defining a test conduit is disposed within the axial bore for movement between a first position permitting test flow through the test conduit and a second position resisting test flow. The piston is biased toward the second position. The test kit includes a test apparatus and a fitting for attachment upon the test valve body in sealing engagement. The fitting defines a displacement surface for engagement, after sealing engagement of the seal with the test valve, with an opposed surface of the piston to urge the piston toward its first position, thereby to establish fluid communication between the test apparatus and a region of the backflow preventer conduit. A method of testing fluid within the flow conduit of the backflow preventer is also described.</p> |
申请公布号 |
CA2165047(C) |
申请公布日期 |
2001.10.23 |
申请号 |
CA19952165047 |
申请日期 |
1995.12.12 |
申请人 |
WATTS INVESTMENT COMPANY |
发明人 |
ACKROYD, RAND H.;HOFMANN, STEVEN PAUL |
分类号 |
E03B7/00;E03B7/07;F16L37/00;(IPC1-7):F16K51/00 |
主分类号 |
E03B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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