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NEAR BOILER PIPING APPARATUS

  • US 20100319795A1
  • Filed: 07/14/2010
  • Published: 12/23/2010
  • Est. Priority Date: 01/04/2006
  • Status: Active Grant
First Claim
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1. A near boiler piping apparatus, comprising:

  • a primary-secondary loop interface apparatus including,a primary loop portion including a tubular fluid conduit having a circumferential sidewall, a first end and a second end for interfacing with a primary loop in a plumbing system;

    a secondary loop portion including a first neck portion extending from the circumferential sidewall and a second neck portion extending from the circumferential sidewall, wherein the first neck portion and second neck portion are substantially parallel to each other and substantially perpendicular to the primary loop portion to form a pair of closely spaced tees suitable for hydraulic separation of fluid flow between the primary loop portion and the secondary loop portion;

    the secondary loop portion further including a first drain valve portion extending from the first neck portion including a first drain shut-off valve disposed therein and a first drain port, and a second neck portion including a second drain shut-off valve disposed therein and a second drain port, wherein the respective drain shut-off valve(s) are arranged to enable or disable flow through the respective drain port(s);

    the secondary loop portion further including a first secondary loop interface port terminating the first neck portion and a first secondary loop shut-off valve disposed in the first neck portion between the first secondary loop interface port and the circumferential sidewall;

    the secondary loop portion further including a second secondary loop interface port terminating the second neck portion and a second secondary loop shut-off valve disposed in the second neck portion between the second secondary loop interface port and the circumferential sidewall;

    wherein each of the first secondary loop shut-off valve and second secondary loop shut-off valve includes an open operative position configured to open a main flow-path between the respective secondary loop interface port and the primary loop portion, and a closed operative position configured to close the main flow path between the respective secondary loop interface port and the primary loop portion, andwherein a drain flow path between the secondary loop interface port of each respective neck portion and each corresponding respective drain valve portion is configured to be open in both the open operative position and the closed operative position of the corresponding secondary loop shut-off valve;

    the system further comprising;

    a first flange configured on the first secondary loop interface port to allow attachment of an first flange interface of a circulation pump to the first secondary loop interface port; and

    a return branch pipe section attached to the second secondary loop interface port.

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