Difference between revisions of "Pump - Mono MS"
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<gallery caption="Mono MS mechanical seal rebuild" widths="400px" heights="300px" perrow="2" align="center"> | <gallery caption="Mono MS mechanical seal rebuild" widths="400px" heights="300px" perrow="2" align="center"> | ||
| − | File:Mono ms2 seal parts and rotor.jpg| Components of the seal. Top is the piece of fabric that had found its way into the seal, and a new O ring beneath the components. Rotor is at the bottom. | + | File:Mono ms2 seal parts and rotor.jpg|Components of the seal. Top is the piece of fabric that had found its way into the seal, and a new O ring beneath the components. Rotor is at the bottom. |
| − | File:Mono ms3 old and new o ring.JPG | + | File:Mono ms3 old and new o ring.JPG|The only noticable damage was the profile of the O ring (it was assumed that the item was origonally a circular cross section) which had adopted more of a square section. |
File:Mono ms4 thrower ring.JPG | File:Mono ms4 thrower ring.JPG | ||
File:Mono ms5 mechanical seal static track.JPG | File:Mono ms5 mechanical seal static track.JPG | ||
Revision as of 20:26, 10 May 2013
Mono have been manufacturing pumps since 1935. The design is what's known as a progressive cavity pump, being a single helix rotor operating within a twin helix stator. In very simplistic terms it can be thought of as being similar to an Archimedean spiral pump.
The MS pump has been in manufacture for at least 40 years and spare parts are still available. New these pumps retail at several hundred pounds but, although they don't appear frequently, they can be found second hand at reasonable prices on on line auction sites.
The design is self priming and can be considered as a positive displacement pump. It is capable of pumping a large range of media including slurries and small entrained solids, although the latter will obviously enduce premature ware. Different stator materials are available and the writer has had a viton stator pumping bio and vegatable oil in an MS pump for nearly five years at the time of writing with no noticible adverse effects.
The pumps ability to pump viscous liquids makes it ideal for pumping WVO and semi-solid fats.
The Mono MS has the following specifications and performance:
- power(kw) ... 0.18
- Max. head ... 3.5 bar
- Flow at 1450rpm ... 12.5 L/min @ 0 bar - 5.3 L/min @ 3.5 bar.
- Max. SUCT ... 8m (self priming)
- Max operating temperature ... TBA
- Inlet/Outlet connections … ¾” BSP, female
- Body material ... cast iron
- Rotor material ... stainless steel
- Stator material ... synthetic nitrile rubber (standard) but others available including viton.
- Weight ... 16kg (including motor)
Mono MS mechanical seal rebuild
The writers MS pump was found leaking so was dismantled. The problem was found to be a piece of landscaping fabric (used as a filter in the system). This seal differed from others in that there are no bellows. The static seal is made by an O ring located in the ceramic disc which seals it to the shaft.
- Mono MS mechanical seal rebuild
Components of the seal. Top is the piece of fabric that had found its way into the seal, and a new O ring beneath the components. Rotor is at the bottom.
The only noticable damage was the profile of the O ring (it was assumed that the item was origonally a circular cross section) which had adopted more of a square section.
