SPI SP41 Owner's manual

PUMPS
SP41/SP51/SP61/SP81
INSTALLATION
OPERATION
MAINTENANCE

Introduction ...........................................................................3
Safety ................................................................................4
Materials of Construction................................................................5
Seal Types.............................................................................5
Surface Finish..........................................................................5
Approvals .............................................................................5
Spare Parts..........................................................................6-9
Seal Kits........................................................................... 10 -11
Part Number Configurator ..............................................................12
Assembly Instructions - SP41 ......................................................... 13-18
Exploded Diagram - SP41 ..............................................................19
Assembly Instructions SP51/SP61/SP81 ................................................20-27
Exploded Diagram SP51/SP61/SP81 ..................................................28-30
Dimensions ...........................................................................31
Pump Curves ......................................................................32-36
Friction Loss Chart .....................................................................37
Warranty ..........................................................................38-39
\\TABLE OF CONTENTS

3
\\INTRODUCTION
ABOUT
Thank you for purchasing a pump from Stainless Products, LLC (SPI).
This manual contains installation, operation, and maintenance instructions for the SP41, SP51, SP61,
and SP81 pumps.
SPI pumps are designed for minimal routine maintenance, but care and attention should be given
to the instructions provided in this manual.
Do not remove any labeling on any SPI product. Immediately replace any label that is missing.
If, at any point, you have questions or concerns regarding your SPI pumps, please call 1-800-558-
9446 or 262-859-2826.

4
\\S A F E T Y
IMPORTANT SAFETY INFORMATION
Read this manual before installing, operating, and maintaining this equipment. Failure to read the
manual can result in personal injury and/or equipment damage.
Do not attempt to remove and/or modify any SPI product. Doing so can create unsafe conditions
for the operator(s) and/or surrounding persons . Any change to SPI products will void any and all
warranties.
Do not place any SPI product in an application where general product service ratings are ex-
ceeded. Doing so puts the operator(s) and/or surrounding persons at risk of personal injury and/or
result in equipment damage.
Do not remove any labeling on any SPI product. Immediately replace any label that is missing.
DISCLAIMER OF LIABILITY
SPI does not assume responsibility and expressly disclaims liability for loss, damage, or expenses
that arise in any way from the installation, operation, use, or maintenance performed in accor-
dance with this manual. SPI assumes no responsibility for any infringement of patents or other
rights of third parties that may result from use of the module . No license is granted by implication
or otherwise under any patent or patent rights.
SPI reserves the right to make changes to the product, specifications, or this manual without prior
notice.

5
\\TECHNICAL DATA
MATERIALS OF CONSTRUCTION
• Pump Head: 316L stainless steel
• Impeller: 316L stainless steel or CF8M (316) stainless steel
• Backplate: 316L stainless steel
• Impeller shaft: 316L stainless steel
• Adapter: 304 stainless steel
• Optional leg kit: 304 stainless steel
SEAL TYPES
• Single mechanical with:
• Resin impregnated carbon rotary seal
• PTFE rotary seal (optional)
• Ceramic stationary seal
SURFACE FINISH
• 32Ra or less on product contact surfaces
APPROVALS
• 3-A per 02-11
• Materials FDA approved

6
\\SPARE PARTS  SP
SP41 Spare Parts
Item # Part Number Description Qty Kit
1 SP41-19-56 Pump Adapter 1
2 10B-1.5-HSP-NP Set Screw 2
3 SP6-41-SSFDP Set Screw 1
4 SP6-41-56 Impeller Shaft 1
5 SP51-80C Ceramic Stationary Seal 1 ▲
6SP51-80T
SP51-80TC
Rotary Seal PTFE
Rotary Seal Carbon 1▲
7 SP51-80N Seal O-Ring 1 ▲
8 SP41-80S Spring 1 ▲
9 SP41-40 Impeller O-Ring 1 ▲
10 SP41-2-Size Impeller 1
11 SP40-4 Backplate Gasket 1
12 SP41-1 Pump Head 1
13 SP13HC-4 Pump Head Clamp 1
▲Included in SP41-SK Seal Kit
2” Inlet x 2” Outlet available upon request

7
\\SPARE PARTS  SP
SP51 Spare Parts
Item # Part Number Description Qty Kit
1 SP51-19-56 Pump Adapter 1
2 SP26-51 Retaining Pin 1
3SP6-51-56
SP6-51-145 Impeller Shaft 1
4 SP6-41-SSFDP Set Screw (for -56 Shaft only) 2
5 10B-1.5-HSP-NP Set Screw (for -56 Shaft) 1
Set Screw (for -145 Shaft) 2
6 SP51-11 Backplate 1
7 SP51-80C Ceramic Stationary Seal 1▲
8SP51-80T
SP51-80TC
Rotary Seal PTFE
Rotary Seal Carbon 1▲
9 SP51-80N Seal O-Ring 1 ▲
10 SP51-80S Spring 1 ▲
11 SP51-2-Size Impeller 1
12 SP40-215 Backplate Gasket 1
13 SP51-1 Pump Head 1
14 SP51-13HC Pump Head Clamp 1
▲Included in SP51-SK Seal Kit
2” Inlet x 2” Outlet available upon request

8
\\SPARE PARTS  SP61
SP61 Spare Parts
Item # Part Number Description Qty Kit
1SP61-19-56
SP61-19-184 Pump Adapter 1
2 SP26-51 Retaining Pin 1
3
SP6-61-184
SP6-61-215
SP6-61-256
Impeller Shaft 1
4 10B-1.5-HSP-NP Set Screw 2
5 SP61-11 Backplate 1
6 SP51-80C Ceramic Stationary Seal 1 ▲
7SP51-80T
SP51-80TC
Rotary Seal PTFE
Rotary Seal Ceramic 1▲
8 SP51-80N Seal O-Ring 1 ▲
9 SP51-80S Spring 1 ▲
10 SP61-2-Size Impeller 1
11 SP40-216 Backplate Gasket 1
12 SP61-1 Pump Head 1
13 SP61-13HC Pump Head Clamp 1
▲Included in SP61-SK Seal Kit
2” Inlet x 2” Outlet available upon request

9
\\SPARE PARTS  SP81
SP81 Spare Parts
Item # Part Number Description Qty Kit
1 SP81-19-184 Pump Adapter 1
2 SP26-81 Retaining Pin 1
3
SP6-81-184
SP6-81-215
SP6-61-256
Impeller Shaft 1
4 10B-1.5-HSP-NP Set Screw 2
5 SP81-11 Backplate 1
6 SP81-80C Ceramic Stationary Seal 1▲
7SP81-80T
SP81-80TC
Rotary Seal PTFE
Rotary Seal Carbon 1▲
8 SP81-80N Seal O-Ring 1 ▲
9 SP81-80S Spring 1 ▲
10 SP81-2-Size Impeller 1
11 SP40-218 Backplate Gasket 1
12 SP81-1 Pump Head 1
13 SP81-13HC Pump Head Clamp 1
▲Included in SP81-SK Seal Kit

10
\\SEAL KITS
SP41 Seal Kit
SP41-SK-C
Item # Part Number Description Qty
5 SP51-80C Ceramic Stationery Seal 1
6 SP51-80C Rotary Seal - Carbon 1
7 SP51-80N Seal O-Ring 1
8 SP41-80S Spring 1
9 SP41-40 Impeller O-Ring 1
SP41 Seal Kit
SP41-SK-T
Item # Part Number Description Qty
5 SP51-80C Ceramic Stationery Seal 1
6 SP51-80T Rotary Seal - PTFE 1
7 SP51-80N Seal O-Ring 1
8 SP41-80S Spring 1
9 SP41-40 Impeller O-Ring 1
SP51 Seal Kit
SP51-SK-C
Item # Part Number Description Qty
7 SP51-80C Ceramic Stationery Seal 1
8 SP51-80C Rotary Seal - Carbon 1
9 SP51-80N Seal O-Ring 1
10 SP51-80S Spring 1
SP51 Seal Kit
SP51-SK-T
Item # Part Number Description Qty
7 SP51-80C Ceramic Stationery Seal 1
8 SP51-80T Rotary Seal - PTFE 1
9 SP51-80N Seal O-Ring 1
10 SP51-80S Spring 1

11
\\SEAL KITS
SP61 Seal Kit
SP61-SK-C
Item # Part Number Description Qty
6 SP51-80C Ceramic Stationery Seal 1
7 SP51-80C Rotary Seal - Carbon 1
8 SP51-80N Seal O-Ring 1
9 SP41-80S Spring 1
SP61 Seal Kit
SP61-SK-T
Item # Part Number Description Qty
6 SP51-80C Ceramic Stationery Seal 1
7 SP51-80T Rotary Seal - PTFE 1
8 SP51-80N Seal O-Ring 1
9 SP41-80S Spring 1
SP81 Seal Kit
SP81-SK-C
Item # Part Number Description Qty
6 SP81-80C Ceramic Stationery Seal 1
7 SP81-80C Rotary Seal - Carbon 1
8 SP81-80N Seal O-Ring 1
9 SP81-80S Spring 1
SP81 Seal Kit
SP81-SK-T
Item # Part Number Description Qty
6 SP81-80C Ceramic Stationery Seal 1
7 SP81-80T Rotary Seal - PTFE 1
8 SP81-80N Seal O-Ring 1
9 SP81-80S Spring 1

12
\\PART NUMBER CONFIGURATOR
SP51 1.5x1.0 56 5.00
- - -
MODEL:
SP41
SP51
SP61
SP81
3
1 4
2
CONNECTION SIZE:
INLET xOUTLET
SP41
1.5x1.0
2.0x2.0
SP51
1.5x1.0
2.0x2.0
SP61
2.0x1.5
2.0x2.0
SP81
3.0x2.0
MOTOR FRAME SIZE:
SP41
56
SP51
56
145
SP61
145
184
215
SP81
184
215
256
IMPELLER SIZE:
SP41
3.50
3.75
SP51
3.50
4.00
4.50
5.00
SP61
4.50
5.00
5.50
6.00
SP81
6.00
6.50
7.00
7.50
8.00

13
\\ASSEMBLY INSTRUCTIONS  SP41
1. Clean and degrease the motor shaft. Apply a small amount of food-grade anti-seize to the
motor shaft and keyway. The key is not required on the SP41 because it uses the 56C shaft
shown in Figure 1.
2. Apply the impeller shaft (4) onto the motor shaft and lightly snug only the set screw shown in
Figure 3 using a 5/32” hex wrench. The impeller shaft will need to be adjusted later for impeller
clearance.
A. The 56C frame size impeller shaft has three set screws
• The 56C impeller shaft uses two special set screws (2) shown in Figure 2 with smaller
diameters to tighten against the flat in the motor’s keyway. The key provided with the
motor is not required in this assembly. Tighten the two set screws onto the motor keyway
using a 5/32” hex wrench and then tighten the third set screw (3) onto the motor shaft.
FIG. 1 - SP41 IMPELLER SHAFT — MOTOR SIDE FOR 56C
FIG. 2 - 56C IMPELLER SHAFT SET SCREW FOR KEYWAY FIG. 3 - SP41 IMPELLER SHAFT SET SCREWS — ONLY SNUG BOTTOM SCREW IN THIS STEP
BOTTOM SCREW

14
3. Temporarily assemble the pump adapter (1) onto the motor c-face using the four hex-head cap
screws provided. Lightly snug the screws as the adapter will need to be removed later for
access to the impeller shaft (4) screws. The adapter has two slots and one drain hole (shown in
Figure 4 and 5). It is oriented as follows:
• The slots will be on either side but should be oriented horizontally at the 3 or 9 o’ clock
positions.
• The drain hole must point down to allow for proper drainage.
NOTE: If there is not access to the set screw from step 2 through the adapter slot; re-position the
impeller shaft (4) until access is possible.
4. Temporarily assemble the impeller (10) onto the impeller shaft (4). Use food grade anti-seize on
the impeller shaft threads and tighten the impeller by hand, only. It is right hand thread.
5. Set the impeller (10) clearance from the adapter (2) – specification is 0.06” +/- 0.01” clearance.
(See Figure 6.)
A. Loosen the set screw on the impeller shaft (4) using a 5/32” hex wrench by gaining access
through the slots in the adapter.
B. Using a feeler gauge between the impeller (10) and adapter (1), push the impeller onto the
gauge and tighten the set screw on the impeller shaft from step 2.
• Check all impeller blades. If any of them exhibit clearances under the low-end of the
clearance tolerance, repeat steps 5A and 5B until the minimum clearance is met on all
impeller blades.
FIG. 4 - ADAPTER SLOTS FIG. 5 - ADAPTER DRAIN HOLE FIG. 6 - IMPELLER CLEARANCE MEASUREMENT
\\ASSEMBLY INSTRUCTIONS  SP41
0.060±0.01

15
6. Remove the impeller from the impeller shaft. Remove the adapter from the motor. Fully tighten
all three set screws on the impeller shaft and torque to 131 in-lbs. Now the impeller shaft is set in
its place and final assembly can take place.
7. Prepare the adapter for final assembly:
A. Locate the backplate/pump head gasket (11)
B. Install the stationary seal element (5) into the backplate/adapter.
• Use temporary food-grade lubricant on the outer diameter of the elastomer “cup”.
• Do not get dirt, grease, or other contaminants on the seal face which is the smooth side of
the stationary seal and faces away from the motor-side of the pump. Refrain from using
hard tools.
\\ASSEMBLY INSTRUCTIONS  SP41
FIG. 7 - ADAPTER/BACKPLATE SUB-ASSEMBLY COMPONENTS FIG. 8 - ADAPTER/BACKPLATE SUB-ASSEMBLY COMPLETED

16
8. Prepare the rotary seal/impeller for final assembly:
A. Locate the rotary seal (6), seal o-ring (7), spring (8) and impeller o-ring (9).
B. Install the rotary seal element onto the impeller shaft.
• The rotary seal (6) comes in two materials: carbon or PTFE.
• Install the rotary seal (6) onto the impeller shaft (4) with the smooth side facing the
stationary seal (5).
• Install the rotary seal o-ring (7). Use temporary food-grade lubricant and press the o-ring
into the rotary seal until it’s seated down evenly.
\\ASSEMBLY INSTRUCTIONS  SP41
9. Install the spring and impeller:
A. Ensure the spring is the correct coil direction. Figure 13 shows SP41 spring direction.
B. Install the spring onto the impeller shaft/rotary seal as shown in Figure 12.
C. Install the impeller o-ring into the groove on the impeller.
D. Install the impeller. Screw the impeller onto the impeller shaft until it bottoms out. Using a
1” wrench through the slot in the adapter (Figure 4) hold the impeller shaft and snug the
impeller by hand.
FIG. 10 - PTFE ROTARY SEAL FIG. 11 - ROTARY SEAL COMPONENTS
FIG. 9 - CARBON ROTARY SEAL
FIG. 12 - SIDE VIEW OF ROTARY SEAL ON IMPELLER FIG. 13 - SP51 SPRING WITH COUNTER-CLOCKWISE COIL DIRECTION (LEFT) AND SP41 SPRING
WITH CLOCKWISE COIL DIRECTION (RIGHT)

17
10. Install the pump head (12) (sometimes called pump casing):
A. Prepare the pump head clamp (13).
• Apply food grade anti-seize to the threads on the hand nut.
• Adjust the hand nut open so the threaded rod can swing through the receiving side of the
clamp.
B. Install the pump head gasket (11).
C. Present the pump head (12) to the backplate/adapter (1) using a laser or bubble level on the
discharge port to ensure orientation is correct.
FIG. 14 - PUMP HEAD, CLAMP, GASKET
FIG. 15 - PUMP HEAD WITH GASKET INSTALLED
\\ASSEMBLY INSTRUCTIONS  SP41

18
\\ASSEMBLY INSTRUCTIONS  SP41
D. Install the pump head clamp (13).
• Hinge open the pump head clamp enough to fit around the joint.
• Swing the hand nut and threaded rod into the opposing side of the clamp (Figure 16).
• Tighten the tee nut by hand until hand tight with moderate force.
FIG. 16 - PUMP HEAD CLAMP DETAIL

19
\\EXPLODED DIAGRAM SP41
IN ASSEMBLY ORDER
SP41 Spare Parts
Item # Part Number Description Qty Kit
1 SP41-19-56 Pump Adapter 1
2 10B-1.5-HSP-NP Set Screw 2
3 SP6-41-SSFDP Set Screw 1
4 SP6-41-56 Impeller Shaft 1
5 SP51-80C Ceramic Stationary Seal 1 ▲
6SP51-80T
SP51-80TC
Rotary Seal PTFE
Rotary Seal Carbon 1▲
7 SP51-80N Seal O-Ring 1 ▲
8 SP41-80S Spring 1 ▲
9 SP41-40 Impeller O-Ring 1 ▲
10 SP41-2-Size Impeller 1
11 SP40-4 Backplate Gasket 1
12 SP41-1 Pump Head 1
13 SP13HC-4 Pump Head Clamp 1
▲Included in SP41-SK Seal Kit
2” Inlet x 2” Outlet available upon request

20
\\ASSEMBLY INSTRUCTIONS 
\\SP51/SP61/SP81
1. Clean and degrease the motor shaft. Apply a small amount of food-grade anti-seize to the
motor shaft and keyway.
2. Apply the impeller shaft (3) onto the motor shaft and lightly snug the set screws using a 5/32”
hex wrench. The impeller shaft will need to be adjusted later for impeller clearance toward the
final steps of assembly.
A. The 56C frame size impeller shaft has three set screws and the 145TC/184TC/215TC/256TC
has two set screws and a keyway — dierences shown in Figure 18.
• The 56C impeller shaft uses two special set screws (4) shown in figure 2 with smaller
diameters to tighten against the flat in the motor’s keyway. The key provided with the
motor is not required in this assembly. Tighten the two set screws onto the motor keyway
using a 5/32” hex wrench and then tighten the third set screw (5) onto the motor shaft.
• The 145TC/184TC/215TC/256TC impeller shaft uses two set screws. Use the key supplied
with the motor and tighten the set screw onto the motor key using a 5/32” hex wrench.
Then tighten the second set screw (5) onto the motor shaft. Refer to torque specs in
Table 1.
MOTOR FRAME TORQUE ON SET
SCREWS (IN-LBS)
56C 131
145TC 131
184TC 131
215TC 131
256TC 131
TABLE 1 - SET SCREW TORQUE SPECS
FIG. 18 - SP51 IMPELLER SHAFTS — MOTOR SIDE FOR 56C (LEFT) AND 145TC (RIGHT)
FIG. 19 - 56C IMPELLER SHAFT SET SCREW FOR KEYWAY