System for Introducing an Additive Into a Fluid Conduit
First Claim
1. A fluid circulation system comprising first and second conduit portions which are part of a circulation path for a fluid, and a pump for circulating the fluid around the circulating path, wherein there is provided an additive unit comprising:
- a chamber having an inlet which is connected to first conduit portion and an outlet which is connected to the second conduit portion;
an inlet valve for selectively permitting fluid flow from the first conduit portion into the chamber, and an outlet valve for selectively permitting fluid flow from the chamber to the second conduit portion;
a drain outlet for the chamber, controlled by a drain valve;
an access port for introducing fluid into the chamber from an external source, and a closure for the access port.
0 Assignments
0 Petitions
Accused Products
Abstract
An additive unit for a central heating or hot water system is connected in line to conduits of the system. The additive unit comprises a chamber having an inlet connected to a first conduit and provided with a valve, and an outlet connected to a second conduit and provided with a valve. The chamber is provided with a drain tap and an access port with a closure cap. A bypass conduit extends through the interior of the chamber. The inlet valve and the outlet valve switch flow from a normal route through the chamber to a bypass route through the bypass conduit. Fluid isolated in the chamber can be removed via a drain tap and an additive/top up fluid introduced via a port. Normal flow can then be restored by operating the valves.
10 Citations
27 Claims
-
1. A fluid circulation system comprising first and second conduit portions which are part of a circulation path for a fluid, and a pump for circulating the fluid around the circulating path, wherein there is provided an additive unit comprising:
- a chamber having an inlet which is connected to first conduit portion and an outlet which is connected to the second conduit portion;
an inlet valve for selectively permitting fluid flow from the first conduit portion into the chamber, and an outlet valve for selectively permitting fluid flow from the chamber to the second conduit portion;
a drain outlet for the chamber, controlled by a drain valve;
an access port for introducing fluid into the chamber from an external source, and a closure for the access port. - View Dependent Claims (2, 3, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- a chamber having an inlet which is connected to first conduit portion and an outlet which is connected to the second conduit portion;
-
4-7. -7. (canceled)
-
20. (canceled)
-
21. An additive unit for use in adding an additive to fluid in a fluid circulation system, the additive unit comprising:
- a chamber, an inlet connected to the chamber and adapted for connection to a first conduit portion, an outlet connected to the chamber and adapted for connection to a second conduit portion;
an inlet valve for the inlet, an outlet valve for the outlet;
a drain outlet for the chamber, controlled by a drain valve;
an access port for introducing fluid into the chamber from an external source, and a closure for the access port. - View Dependent Claims (24, 25, 26, 27)
- a chamber, an inlet connected to the chamber and adapted for connection to a first conduit portion, an outlet connected to the chamber and adapted for connection to a second conduit portion;
-
22-23. -23. (canceled)
Specification