Numa Patriot RC50, Инструкции по уходу и обслуживанию

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Page 2
11/06/20
Patriot
®
RC50
FUNCTIONAL DESCRIPTION
1. CONNECTOR TUBE
The connector tube fits in the backhead and on top of the collection tube to connect
the drill to those reverse circulation drills rods that use connector tubes.
2. COLLECTION TUBE
The collection tube extends from the check valve seat to the bit and transfers the
collected formation sample to the inner drill pipe of the reverse circulation drill rod.
The collection tube is designed to be easily replaced.
3. BACKHEAD
The backhead connects the hammer to the drill rod. Standard backheads are
available with threads that are compatible with most 4-1/2 reverse circulation drill
rod. Wrench flats are provided for disassembling.
4. PIN
Two pins align the feed tube into the backhead. They are made of hardened steel to
ensure long life.
5. BACKHEAD BEARING
The backhead bearing alligns and seals the backhead into the case bore.
6. CHECK VALVE SEAT
The check valve seat provides the sealing surface for the check valve and is located
in the backhead. The check valve seat locates the collection tube in the proper area.
7. CHECK VALVE
The check valve maintains pressure in the hammer when the air supply has been shut
off. The pressure in the hammer balances the hydrostatic pressure in the hole thereby
preventing contaminants from entering the hammer.
8. CHECK VALVE SPRING
The check valve spring provides tension under the check valve to keep it closed. It
is compressed as the air is turned on.