C41 • C51 • C61 Series Close Coupled Centrifugal Pumps
- Capacities to 105 GPM
- Heads to 153 Feet
- Horizontal Close Coupled
MTH C41 • C51 • C61 Series Pumps
Flange Mounted Centrifugal Pumps
MTH Stainless Steel Flange Mounted Centrifugal Pumps offer the best materials available to create the longest lasting pumps for your boiler feed needs.
56C Face Adapter
Fits a P31, T31, or C Series Pump to any Standard 56 C-face Motor.
Impeller
Design
C Series semi-open impellers allow the pump to pass small solids and fibrous material while close running tolerances maintain efficiency and performance. Impellers are pre-trimmed to be non-overloading to the pump and motor size indicated.
NPSH Requirements
C Series centrifugal pumps meet low net positive suction head requirements (NPSHR) without sacrificing efficiency. This is achieved by low fluid inlet velocity and gentle acceleration to peripheral velocities.
Mechanical Seal Box
The large seal chamber provides a wide fluid passage area for maximum cooling of the seal faces and allows debris and gases to be flushed away.
Axial Balance System
The C Series pumps utilize a thrust balancing system which combines the advantages of both static and dynamic balancing techniques to reduce axial thrust and provide longer bearing life.
D3 Motors
Similar to the T31 Series, the C Series takes advantage of our custom manufactured dual face D3 motors that incorporate a 304 stainless steel shaft and heavy-duty bearing. The stainless steel shaft eliminates the necessity of a shaft sleeve, thereby reducing the parts count and simplifying maintenance and servicing procedures. All D3 motors also feature a two-pole 50/60Hz rating, as well as CE Mark approval useful for OEM's with worldwide customers. The three-phase versions of the D3 motors feature a compact TEFC enclosure and a range from 1/3 to 3HP. The single phase D3 motors have an ODP enclosure and a range from 1/3 to 2HP.
Adjustable Casing
C Series pump casings are axially adjustable allowing the use of custom impellers for OEM applications and to allow restoration of performance by closing up the internal clearances that develop over the course of a unit's extended service life.
Quick Selection Guide |
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4" Pump |
1/3 HP |
1/2 HP |
3/4 HP |
1 HP |
1 1/2 HP |
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1/2 X 3/4 X 4 |
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3/4 X 1 X 4 |
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1 X 1 1/4 X 4 |
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1 1/4 X 1 1/2 X 4 |
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1 1/2 X 2 X 4 |
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5" Pump |
1/2 HP |
3/4 HP |
1 HP |
1 1/2 HP |
2 HP |
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1/2 X 3/4 X 5 |
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3/4 X 1 X 5 |
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1 X 1 1/4 X 5 |
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6" Pump |
1 1/2 HP |
2 HP |
3 HP* |
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1/2 X 3/4 X 6 |
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3/4 X 1 X 6 |
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1 X 1 1/4 X 6 |
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| *3 HP Motors are only available in Three Phase Configuration at this time. | |||||||
Horizontal Closed Coupled
The contractor shall furnish (and install as shown on the plans) an MTH (C41) (C51) (C61) Series horizontal close-coupled centrifugal type pump size_________ stainless construction. Each pump shall have a capacity of ____GPM when operating at a total head of _______feet. Suction pressure will be ____feet with a liquid temperature of ____°F.
The pump is to be furnished with 5/8” Type 2106 mechanical seal with stainless steel metal parts, (Buna) (Viton) elastomers, (ceramic seat and carbon primary ring) (Graphite loaded silicon carbide seat and primary ring). A 304 stainless steel shaft shall be furnished in all pumps.
The pump casing shall be vertically split, end suction. (Top Discharge) (90° Discharge) (180° Discharge) (270° Discharge) The impeller shall use dynamic thrust balancing.
The pump shall be close-coupled to an 80mm “C” face ___HP ___phase ___Hertz ___Volt ___RPM horizontal (Open Drip-Proof) (Totally Enclosed) motor with a CE Mark and UL rating.
For a copy of the C Series Manual and C Series Parts List, go to the Product Support Page.
Download a printable version of the C Series Product Bulletin in .pdf format.
Download the complete C Series Series Section (curves and dimensions) from the Standard Products Catalog.