MOGAS RSVP User manual

© Copyright 2006 MOGAS Industries, Inc. 281.449.0291 www.mogas.comSRD-1004 1
Replacing
Stem Packing
for the MOGAS
Improved RSVP Metal Seated Ball Valve

© Copyright 2006 MOGAS Industries, Inc. 281.449.0291 www.mogas.comSRD-1004 2
WARNING!
DO NOT perform this task under line pressure. Make sure the line is not under pressure.
Locate packing gland nuts (15). Turn nuts counter
clockwise to loosen and remove packing gland nuts.
Locate and slide upward the gland flange (07A), live-
loading springs (07C) and gland thruster (07B).
Remove studs (12) — this allows access to the used
packing rings.
Using a small pick, carefully remove the packing
rings (09A).
The solid metal anti-extrusion ring (09C) at the bottom
of the packing box should not be removed.
Note:
Refer to exploded view of valve (page 6) to identify
parts and reference numbers.
REPLACING STEM PACKING
15
07A
12
07C
07B
09A
!
1
2
3
4

© Copyright 2006 MOGAS Industries, Inc. 281.449.0291 www.mogas.comSRD-1004 3
The new packing ring set will contain 2 anti-extrusion
rings (09B) and 2 or 3 packing rings (09A). (Refer to the
table below to verify the correct packing ring quantity.)
These rings are supplied with a skive cut. Assemble
the rings as shown. Position the skive cut on each ring
opposite, alternating the adjacent skive cut rings. All
rings should fit into the packing box.
Carefully bend each fragile ring, spiraling it around the
stem (05), then insert and evenly press into the packing
box.
DO NOT try to open ring wide enough to install the
ring from the front. Instead, snake it around the stem,
minimizing how wide it must be opened. Forcing the
ring onto the stem frontally usually causes the ring to
break.
Use an air hose to clean debris from packing box
before installing new packing rings.
Note:
Always wear a face shield or mono-goggles to protect
eyes from flying debris.
Use gland thruster (07B) as tool to slide each ring into
packing box. Continue this process until all rings are
positioned correctly in the packing box.
Quantity of Valve Packing Rings
Valve Bore 1500# 3100# 4500#
0.63 inches 2 3 3
1.00 inches 3 3 3
1.3 inches 3 3 —
1.5 inches 3 — —
REPLACING STEM PACKING
Skive Cut
Skive Cut
Skive Cut
Skive Cut
Skive Cut
09A
09A
09A
09B
09B
07B
5
6
7
8

© Copyright 2006 MOGAS Industries, Inc. 281.449.0291 www.mogas.comSRD-1004 4
Slide the gland thruster (07B) over the packing box.
Re-install the studs (12).
Re-install the gland flange (07A) over the packing
bolting.
Position the live load springs (07C) on top of the gland
thruster (07B).
REPLACING STEM PACKING
07B
07C
07B
12
07A
9
10
11
12

© Copyright 2006 MOGAS Industries, Inc. 281.449.0291 www.mogas.comSRD-1004 5
Cycle valve a couple times to ensure proper
re-packing.
Verify torque as shown in the table above.
Install and tighten nuts (15) evenly by alternating sides
when tightening. Make sure the gland flange (07A)
does not bind or drag on the stem (05).
The following table shows the proper torque required.
Recommended Packing Gland Stud Torque (ft. lbs.)
Valve Bore 1500# 3100# 4500#
0.63 inches 4 11 16
1.00 inches 7 15 25
1.3 inches 8 17 —
1.5 inches 9 — —
REPLACING STEM PACKING
07A
05
15
14
13

© Copyright 2006 MOGAS Industries, Inc. 281.449.0291 www.mogas.comSRD-1004 6
VALVE PART NUMBER REFERENCE
(05) Stem
(15) Nut, Std. Hex (qty. 4)
(07A) Gland Flange
(07C) Spring Disc, Live Load (qty. 2)
(07B) Thruster, Gland Flange
(09B) Ring, Anti-Extrusion
(09B) Ring, Anti-Extrusion
(09A) Ring, Stem Packing (qty. 2 or 3)
(09C) Ring, Anti-Extrusion, Metal
(12) Stud (qty. 4)
(89) Valve Tag
(35) Set Screws (qty. 2)
(84) Contraction Ring
(28) Retaining Ring
(29) Transition Sleeve
(01C) Spring Disc
(01D) Seat Ring Pusher
(01A) Ball
(01B) Seat Ring
(02) Body
(16) Stem Bushing
(17) Pin
(06) Key (qty. 2)
(17B) Washer
(17A) Washer, Tabbed
(18) Bolt
(36) Hex Head
Bolt (qty. 2)
(53) Hand Lever
(53A)
Hand Grip
(42)
Mechanical
Precision
Stop (MPS)
(84)
Contraction
Ring
(36) Hex Head Bolt
(17C) Washer
(13) Handle Adaptor
Note: Replacing stem packing is
the only field repair recommended.
For all other repairs, contact
MOGAS Service Dept.