Xylem G&L A-C 9100 Series, Инструкция по эксплуатации

Страница: 42 / 60

NOTE: Sliding inboard bearing housing toward coupling before assembling rotating
element in casing will ease assembly.
18.Bolt outboard bearing housing in place. Be sure that both housings are seated in lower
half casing.
19.Bolt inboard bearing housing in place.
20.Clean the gasket surfaces of the casing. Apply Scotch 3M-77 spray adhesive or
equivalent to the lower half of the casing.
21.Within one minute of spraying, set the gaskets (2–123–5, –6) in place on the lower half
casing. Align the holes in the gaskets with the holes in the casing and press the gaskets
firmly against the lower half casing face in the area coated by the adhesive.
22.Lower upper half casing (2–001–7) into place and locate using the taper dowels (2–
916–9) and install casing main joint bolts (2–904–9). The casing joint bolts should be
tightened to the following torques: 300 ft-lb minimum for .75”-10 Ferry Cap
Counterbore screws (Grade 8), 400 ft-lb minimum for 1.0”-8 Ferry Cap Counterbore
screws (Grade 8). Refer to bolt torque pattern (Figure 20). Before tightening bolt, be
sure that taper dowels are seated properly in reamed holes.
NOTE: Torque valves are essential in obtaining proper gasket compression so no
leafage can occur at main joint.
CAUTION: Double-check rotation of pump before installing the upper half casing.
23.Slide deflectors (3–136–9) toward bearing covers. Allow rotating clearance of
approximately 1/16”.
24.Rotate shaft by hand to assure that it turns smoothly and is free from rubbing and
binding.
25.Cut full rings of 5/8 inch square packing so that ends butt, leaving no gap between
packing and casings. Install three rings of packing (1–924–9) and tap fully to bottom of
both stuffing boxes. (See figure below) Stagger joints of each ring of packing at least
90 degrees. Install seal cage (1–013–2) and be sure that it will line up with seal water
inlet when packing is compressed. Install remaining three rings of packing with joints
staggered.
26.Assemble glands (1–014–2) square with stuffing box and pull tight. Then loosen gland
bolts (1–904–9) to permit packing to expand and retighten finger tight. Final
adjustment of gland bolts must be done when pump is running.
27.Assemble seal water lines (0–901–0, 0–950–0, 0–952–0) to stuffing box and casing. Seal
water lines go to outside holes. Refer to Dimension section for more information.
28.Check coupling alignment and redowel if necessary.
6 Maintenance
40 G&L Pumps Series A-C 9100 Base Mounted Centrifugal Pumps INSTRUCTION MANUAL