REED DM3MECH Manual Del Operador página 4

Mechanical Hot Tapping Machine
Operation (Using a flanged valve):
Verify all equipment is in good condition. Use only fittings, nipples
and valves pressure rated for the job. Electrical tools and exten-
sion cords must comply with OSHA rules. Outside the United
States, follow the rules of and comply with the local governing
body for Occupational Safety. Using a ground fault interrupter
increases operator safety when using electric power tools around
water and other fluids.
1. Fabricate and weld a pipe saddle and flange assembly no
longer than 4 1/2" from the high part of the mainline to the
face of the flange onto the main.
2. Select the proper size hole saw. Verify the hole saw clears
the gate valve bore adequately. Inadequate clearance can
result in damage should the hole saw contact the valve while
sawing.
3. Bolt the valve to the flange.
4. Select the appropriate shaft.
A. For 5/8" and 1 1/8" hole saws, screw directly to the the
18" shaft (no arbor).
4
B. For 1 3/8" to 3 1/4" hole saws, use the #43514 arbor on
the 24" shaft.
5. Install Hole Saw.
A. 5/8" to 1 1/8" Hole Saws screw directly to the 18" shaft
B. 1 3/8" to 3 1/4" Hole Saw - insert #43514 arbor into the
24" shaft, tighten set screws. Screw the hole saw on to
the end of the arbor, align barrel pins with holes on hole
saw and turn the upper diameter of the arbor to engage
barrel pins.
6. Install coupon retaining drill bit. The end of the wire must ex-
tend past the end of the hole saw to retain the coupon. Align
the flats on the bit with the set screw and tighten. See Figure
5 to set coupon retaining drill bit.
7. A. Apply a thin layer of H1 grease to the shaft before and
after use.
B. Loosen the Gland Nut and install the shaft gently. Use a
twisting motion while pushing the shaft past the seal in
the Main Body.
C. Tighten the gland nut until snug.
8. Assemble appropriate bleed-off "T" to the Main Body.
9. Assemble the Branch size threaded flange, Branch size by 1
1/4" bushing, 1 1/4" by close nipple, 1 1/4" by 1 1/4" by 1 1/4"
"T", Sealing Unit. See Figure 6.
10. Bolt the Boring Assembly onto the valve.
11. Install the Bleed-off Valve onto the "T".
12. Pressure test setup through the Bleed-off Valve.
13. Attach hose to Bleed-off Valve for flushing chips to drain (if
desired).
14. Chuck shaft into drill motor.
• MAKE SURE drill is set in non-hammer mode.
• DO NOT USE impact type drills.
15. Drill until pilot drill penetrates the main line. Verify seals OK.
One can hand tighten the Gland Nut should fluid leak past the
Main Body at the shaft. Do not over tighten the Gland Nut.
16. Resume drilling. Use moderate pressure until the hole saw
penetrates the main completely. Reduce the pressure on the
drill prior to break through. Reducing the pressure before
break through reduces the likelihood of the retainer, coupon
and hole saw hitting the back side of the main.
17. Pull the drill and shaft back to the limit, shut the Branch Valve,
open the Bleed Valve and then disconnect the Boring Assem-
bly from the Branch valve.
18. Loosen the Gland Nut and remove the one shaft with a twist-
ing motion. Apply a thin layer of H1 grease to the shaft to
prevent rusting.
Operator's Manual