Figure 6: Seat Offering; Table 1: Recommended Lubricants For Standard Service Valves; Table 2: Typical Stem Seal Assembly Quantities; Table 3: Minimum Stem Nut Torque Requirements For Plastic Seal Materials (Ft.-Lb.) - Flowserve McCANNA User Instructions

Table 1: Recommended Lubricants for Standard Service Valves

Fluorolube GR­362 or other grades are considered the standard lubricant on all T, R, U and W seated valves. This also applies to TFE and RTFE
based stem seals. PCL can also be used on seats in these valves.
Kerosene or Dow Corning DC­33 may be used on valve seats in G seated valves.
Kerosene, Molycoite 321 or Christo­lube MCG ­111 may be used on valve seats in M seated valves.
Carbon graphite stem seals should be lubricated with a mixture of graphite flake and DC­33 silicone grease.
Never­Seez should be used on all bonnet fasteners.
®

Table 2: Typical Stem Seal Assembly Quantities

Reg. Port Size
½ – 1½
(up to 600#)
½ – 1
(900# / 1500#)
2
(150#/ 300#)
1½ (900# and higher)
2 (600# and higher)
3 and above
(all classes)
2 and above
(600# and higher)
Block & Bleer or Extended Bonnet
Washer

Table 3: Minimum Stem Nut Torque Requirements for Plastic Seal Materials (ft.-lb.)

Regular Port
Valve Size
½, ¾ and 1
1/½
2
3
4
6
8 and up
Notes: First numbers are for fluoropolymer stem seals (TFE, PTFE, FEP , PFA). Numbers in parenthesis( ) are for harder seal materials (PEEK, UHMWP , etc.).
Table 4: Minimum Stem Nut Torque Requirements for Flexible Graphite Seals (ft.-lb.)
Regular Port Full Port
Valve Size Valve Size
½, ¾, and 1 ½, and ¾
1/½
2
3
4
6
8
10
12
14
16
18
Notes: Torque requirements set to give a minimum of 5% compression of seal stack height. Smaller sizes will experience 10% or more compression (2" RP and under).
*
, These valves should be assembled with this torque initially, and then during shell testing, the stem nut should be torqued to this requirement, as the lower packing set will be compressed additionally by the test
pressure.
McCANNA
Full Port Size
½ – 1
(up to 600#)
½ – ¾
(900# / 1500#)
1½
(150# / 300#)
1½
600#
2 and above
(all classes)
1½ and above
(600# and higher)
Block & Bleer or Extended Bonnet
Washer
Full Port
Valve Size
½, and ¾
1
1/½
2
3
4
6 and up
Class
150/300
5
1* 10
1/½ 10
2 25
3 35
4 60
6 95
10 100*
12 100*
— 100*
— 100*
— 100*
User Instructions Top-Entry Valve – MMENIM2007-10-4/16 A4
™
Plastic Seat Materials
1 upper
2 lower
2 upper
2 lower
1 upper
2 lower
3 upper
3 lower
3 upper
3 lower
3 upper
2 lower
Class
150/300
10 (10)
15 (25)
15 (25)
15 (25)
20 (40)
35 (50)
50 (95)
Class Class
600 900
10 15
10 20
15 25
25 35
35 60
60 95
95 100*
100* 100*
100* 100*
100* 100*
100* 100*
100* 100*
Grafoil Seat Materials
1 upper
2 lower
2 upper
2 lower
1 upper
2 lower
3 upper
3 lower
3 upper
3 lower
3 upper
2 lower
Class
600
15 (25)
15 (25)
20 (30)
15 (25)
20 (40)
35 (50)
50 (95)
Class
TMBV
1500
15 —
20 —
25 —
35 —
60 —
100* —
100* —
100* 171
100* 171
100* 234
100* 234
100* 234
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