Large Process Pump Design • 33 Mo Mode dell Siz Sizes es • Flo Flows ws to 26, 26,000 000 GPM • He Head ads s to 41 410 0 feet feet • Pre Pressu ssure re to to 232 232 PSIG PSIG
20-Year Life Cycle Costs Maintenance
Based on 6000 hr/year
41% Operating
30%
Installation
24% Purchase
5% Total Cost of Ownership
20-Year Life Cycle Costs Maintenance
Based on 6000 hr/year
41% Operating
30%
Installation
24% Purchase
5% Total Cost of Ownership
Pump Reliability
• Liquid end • Sea eall ch cham ambe ber r • Power end • Baseplate
Hydraulic Coverage
• 33 pump pump size sizes s • Maxim Maximizes izes pump reliability • Covera Coverage ge ensure ensures s efficient operation • Onl Only y 4 power power frames
Impe Im pell ller er De Desi sign gn Open impellers (standard) • So Solilids ds,, fib fiber er & air air ap appl plic icat atio ions ns • Full Full ba bac ck sh shro roud ud fo forr mechanical integrity • Bal Balan anc ce hol holes es fo forr low low axial thrust • Eng Engin inee eere red d bac back k pum pump p out out vanes for low bearing loads
Closed impellers (optional) • Max axiimi miz zed ef effi fici cien enc cy • Replaceable ri rings
Casing Design
EXPANDING VOLUTE CASING
s e c r o F l a i d a R
High Deflection
Expanding Volute Casing
Semi Concentric Casing
SEMI CONCENTRIC
Low Deflection
CASING
Pump Flow
Best Efficiency Point
Solidification Modeling Extra Thickness
Problem wear areas have always included the casing cutwater and wearplate surface. Computer solidification modeling allows extra thickness at crucial wear points for extended life.
Corrosion Reliability
Corrosion has less effect on large section components such as our impeller lock nut.
Crevice corrosion is reduced through the use of o-rings at the critical fluid joints.
Maintain High Performance Goulds External Clearance Adjustment provides: • Precision fit between impeller and sideplate • Sideplate is clamped and sealed • Performance reliability maintained • Moving parts move in a sealed and lubricated environment • Proven in over one million installations over 50 years
Performance Assured • Our Impeller back vanes are engineered in shape and height to be insensitive to impeller adjustments. • Common in recessed impeller pump designs • Proven on Test e r u s s e r P x o B g n i f f u t S
1X
2X
3X
Back Vane Clearance
Sideplate Adjustment (Method used by another pump manufacturer)
• O-ring moves over the corroded & fouled casing surface • Sideplate “floats” on studs - cocking in casing - studs can shear - not precise adjustment • Leakage past o-ring has leakage path through studs
Adjustment Direction
Evolution of Sideplate Adjustment
Closed Impeller with casing rings
Open Impeller floating sideplate
Converting closed impellers to open was economically accomplished using adjustable sideplates.
Seal Chamber Design
“The majority of pump downtime is due to mechanical seal or packing failure.”
Mechanical Seal Considerations • Seal Selection • Shaft Deflection • Seal Environment
Shaft Stiffness – Deflection L3 /D4 < 55 = Industry Target • Pump manufacturers frequently imply L3/D4 ratios yield longer seal life. • Shaft deflection is a function of low L3/D4 and lower radial loads. • All reputable pump manufacturers have deflections under 0.002 in.
Goulds 3180 Frame S Power end
L3 /D4 =44 Frame M Power end
L3 /D4 =40 Frame L Power end
L3 /D4 =25 Frame XL Power end
L3 /D4 =19
Competitor “A” Group 3 Power end
L3 /D4 =41 Group 4 Power end
L3 /D4 =41 Group 5 Power end
L3 /D4 =17
Shaft Deflection
EXPANDING VOLUTE CASING
s e c r o F l a i d a R
High Deflection
Expanding Volute Casing
Semi Concentric Casing
SEMI CONCENTRIC
Low Deflection
CASING
Pump Flow
Low radial load = low deflections
Best Efficiency Point
Mechanical Seals
“ Leading seal manufacturers report that shaft deflection is NOT the cause of seal failures!” The problem is SEAL ENVIRONMENT!
Seal Environment is Critical for Extended Seal Life
Seal Chambers Initially Designed for Packing
Evolution to Large Bore Seal Chambers to Extend Seal Life
Big Bore Seal Chamber
Taper Bore Seal Chamber
(Introduced in the mid 1980’s)
Taper Bore Evolution Conventional taper bore seal chamber – mechanical seals fail when vapor or solids are present
Modified tapered bore seal chamber with axial ribs – good for services containing air, minimum solids
Goulds standard tapered bore plus seal chamber – the best solution for services containing solids and air or vapors
Taper Bore Plus How it Works
1) Solids/liquid mixture flows toward seal chamber 2) Turbulent zone 3) Clean liquid flows towards seal 4) Low pressure zone created by vane particle ejector 5) Seal faces flush with clean liquid
Goulds TaperBore™ Plus Patented: No.5,336,048
Engineered seal chamber with vane particle ejector
Research & Development
Zero Flush Water
Hard Tungsten Carbide Seal Faces
The 3180 has a revolutionary seal chamber design guaranteed to operate on 6% OD stock without flush water! PATENTED!
Patented Vane Particle Ejector
Springs not in fluid
Flush Water Considerations
Why is zero flush important? – Is the pump remotely located? – How reliable is the flush water? • Plugging, Freezing, Lines shut off
– How clean is the flush water? – What is the cost of flushing? • Water treatment • Product dilution
Dynamic Seals Cover
Back Plate
Repeller
Dynamic Seal When Pump is Operating
Hydrodynamic Seal by Repeller
PROVIDES
Air-Pumpage Interface
Dynamic Seals Secondary Sealing Gland
Diaphragm
Follower Sleeve
Diaphragm Secondary Seal for Dynamic Seal
Stuffing Box
Zero Flush Water
The 3180 includes a dynamic seal option design that seals the shaft on 6%OD stock without flush water! Unique grooves allow operation on recycled fibers. *patented
Dynamic Seal Application Limitations • Vacuum Services • Liquids at or near their boiling point • Highly viscous liquids • Liquids that crystallize when exposed to air • Liquids that become corrosive when exposed to air • Severe corrosives • Zero leakage applications
Power ends
• Bearing design life • Bearing environment • Bearing temperature
Bearing Life (Fatigue/Theoretical)
Bearing companies reveal that “fatigue failure is extremely rare.” Contamination and lack of lubrication are the major cause of failure, plus....
e f i L g n i r a e B
i f e L u e g i t a F
Bearing Size
Pump Bearing Life (True Service Life)
Skidding
• Non-optimized bearings will be susceptible to skidding, cage stresses and higher operating temperatures that lead to failure.
Bearing Loads
Measured on Test
Watch the Temperature
The Right Size Keeping the pump loads minimized and selecting the right bearings will keep temperatures under control.
e r u t a r e p m e T
Bearing Size
Bearing Frame Oil Temperatures 180°F
High 160°F
Typical 140°F
Low
120°F
Model 3180 Pumps operate at an average temperature of 120° F
Oil Seals
• Labyrinth oil seals are standard. • Carbon-filled Teflon™ is impervious to fluid corrosion. • Prevents lubricant contamination.
Goulds Labyrinth Seal “Torture Testing” Labyrinth sealing paths
Oil containment test
Water exclusion test
Dust exclusion test
Only the Goulds seal passed every test while competitive labyrinth seals failed.
Power End Reliability • Best in the Industry • Bearing design life >100,000 hrs • Bearing temperatures under 120°F • Superior labyrinth oil seal design • Guaranteed like no other!
Engineered Baseplates
• Fabricated baseplate designs with high torsional stiffness. • Machined surfaces 0.002 inch flatness. • Horizontal motor adjusters & vertical jacking screws
Model 3180 Additional Maintenance and Reliability Features
Ease of Maintenance
•
Integral frame eliminates adapter and provides better seal access.
•
Swing away lugs secure the seal chamber
•
Casing bolts do not have to be removed
•
Swing away lugs also act as jacking bolts
Monitor Sites
Monitoring sites for vibration and temperature are provided as standard for accurate and repeatable readings.
We Take Balancing Seriously
• G2.5 impeller balance (routinely done!) • Engineered shaft (alternating keyways) • Keys and keyways engineered to eliminate voids • Patented arbor designs ensure repeatability • Technicians certified to ISO 9001 standards • Vibration < 0.15 inches/sec
Rigid Support
• The Frame Support is a solid cast machined foot. • Alignment can be assured & maintained.
Pick Your Perfect Process Pump
No one in the industry offers the broad range of process pumps that Goulds does.....
Model LF3196 Designed for Low Flow Services
Model LF3196 – Designed for Low Flow Services D A E H C I M A N Y D L A T O T
System Curve – Actual Throttled Operation
Rated Performance
Not all pumps are designed for low flows Off design operation range
Recommended operation range
FLOW TYPICAL END SUCTION PUMP CURVE
D A E H C I M A N Y D L A T O T
LF3196 designed specifically for trouble-free operation at low flows System Curve – Actual Throttled
FLOW LF 3196 PUMP CURVE
Goulds Model JC Designed for Handling a Wide Range of Corrosive/Abrasive Slurries
Model 3298 Magnetic Drive Pump
Model 3298 Magnetic Drive Pump
Model 3298 Tefzel Construction for Extreme Corrosion Resistance
Model 3500 Medium Consistency Pump (to 16% Bone Dry)
