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Liquiflo Installation, Operation & Maintenance Manual
Appendix 1: Fastener Torque Specifications
Function
Volute – Bracket
1
Assembly
Volute – Bracket
2
Assembly
Impeller - Shaft
Assembly –
SMS
Gland - Seal Housing
Assembly –
Packing
Gland - Seal Housing
Assembly –
DMS
BOLTS for MOTOR or POWER FRAME to BRACKET ASSEMBLY:
1
Motor*- Bracket
or
Power Frame - Bracket
Assembly –
SMS
2
Motor*- Bracket
or
Power Frame - Bracket
Assembly –
SMS
2
Motor*- Bracket
or
Power Frame - Bracket
Assembly –
Packing & DMS
*
NEMA 56C, 143TC & 145TC motor frames
1
Closed design w/ Integral Seal Housing (316 SS)
2
Open design (Cast Iron, Blue Epoxy-Painted)
Seal Codes:
0
Single Internal Mechanical, Type 21, 18-8 SS/Carbon/SiC
1
Single Internal Mechanical, Type 9T, 316 SS/Carbon/SiC
2
Single Internal Mechanical, Type 9A, 316 SS/Carbon/SiC
3
Single Internal Mechanical, Type 9A, 316 SS/Teflon/SiC
4
Double Mechanical, Type 9T, 316 SS/Carbon/SiC
5
Lantern Ring/Teflon Packing
6
Single Internal Mechanical, Type 9T, 316 SS/Teflon/SiC
7
Lantern Ring/Graphoil Packing
Maximum Torque Values for 18-8 Stainless Steel Bolts
Model Code
Position 4 –
Bolt Size
Seal Type
5/16-18 UNC x 1
0, 1, 6
5/16-18 UNC x 1-1/2
5/16-18 UNC x 1-3/4
2, 3, 4, 5, 7
5/16-18 UNC x 2-1/4
2, 3
1/4-20 UNC x 7/16
5, 7
1/4-28 UNF x 1
4
1/4-28 UNF x 5/8
0, 1, 6
3/8-16 UNC x 1
2, 3
3/8-16 UNC x 1
4, 5, 7
3/8-16 UNC x 2-1/2
Centry
Model 620 – Sealed
Bolt
Type
SHCS
SHCS
SHCS
SHCS
HHCS
HHCS
HHCS
SHCS
HHCS
HHCS
33
®
Series Centrifugal Pumps
Max Torque
Quantity
Specifications
(per
Pump)
(in-lb)
3
1
132
3
1
1
75
2
94.0
2
94.0
4
236
4
236
4
236
HHCS = Hex Head Cap Screw
SHCS = Socket Head Cap Screw
SMS
= Single Mechanical Seal
DMS
= Double Mechanical Seal
(N-m)
14.9
8.5
10.6
10.6
26.7
26.7
26.7
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