Sahara Sahara-Pak HC-1260, Instruction Manual

Page: 117 / 136

Reference CS029B Rev 1
Page 4 of 6 08/08/2013
VALVE
SEAT REPLACEMENT
Refer to the component drawing on page 2 of this cut sheet for parts identification. With the disc in the
closed position, remove the valve from the line.
1. Lay the valve down with the disc in the closed position and the seat retainer side facing up.
2. Remove the socket head cap screws (17), the seat retainer (16), and seat (15).
3. Carefully clean the seat area in the body and seat retainer. Remove foreign matter, dirt, etc. Check
disc seating area for nicks or scratches.
4. Place the new seat (15) on disc (2), carefully centering it in the recess in the body.
5. Align the holes in the seat retainer (16) with matching holes in body and carefully place in position on
top of seat (15).
CAUTION: Do not shift the retainer in order to align holes. It may shift from its correct position.
Lightly grease cap screw (17) threads and tighten down evenly, alternating from top to bottom and
side to side. Tighten to the torque values in Table 1 shown below.
6. Operate valve several times and examine seat for any damage before reinstalling the valve in the
line.
TABLE 1
GLAND RETAINER NUT AND SEAT RETAINER SCREW TORQUES
Gland Nut Seat Retainer Screws Valve Size
150 300 150 300
3” 60 60 100 100
4” 60 60 175 175
6” 80 120 100 175
8” 80 140 175 175
10” 110 190 175 300
12" 130 220 300 300