Source of 2 inch balls for water pump

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Source of 2 inch balls for water pump

Home Forums General Questions Source of 2 inch balls for water pump

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  • #538661
    andrew lyner
    Participant
      @andrewlyner71257

      My neighbour has an ancient lift pump to get rainwater water from an underground tank. It's in a bit of a state but most of it's brass with a cast iron bottom section so I have high hopes of renovating it for another sixty years. It's a 'pressurised' model with a pressurised reservoir of a few litres (clever idea) and the two valves use 2 inch check balls. The originals look like hardwood (it's probably at least 60 years old) and are flaking and chewed up.

      I did the usual google trip and there are several sources of 2" check valves with the right sized balls but no one seems to have actual replacement balls. If I grind the seatings to remove any sharp bits then hard plastic snooker balls would probably stand it but something softer would be better, I think.

      I can't turn 2" nylon myself (Mini Lathe) so I need a source of ready made balls. Any ideas, apart from ebay snooker balls at £3 each? Perhaps I could coat them with something?

      Interestingly, corrosion is not too bad – it all came apart with plus gas. But the lift rod end had just rotted away to a point at the piston end. I will do that bit with s/s, I think.

      The gaskets are all hardened and cracking. I need something thickish to replace them but stronger and less buggy than neoprene as the force from the whole lifting mechanism acts on those gaskets. I suppose a good flat seating is the way forwards. Some 'fibre' perhaps?

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      #28093
      andrew lyner
      Participant
        @andrewlyner71257

        Would snooker balls do the job?

        #538662
        Dick H
        Participant
          @dickh

          Probably fiendishly expensive but you could give this lot a ring: (the Precision Plastic Ball Co.) – https://theppb.co.uk/.

          #538664
          Rod Renshaw
          Participant
            @rodrenshaw28584

            A local craft woodturner could make replacement balls, to replace the ones that have lasted 60 years.

            Rod

            #538665
            Dalboy
            Participant
              @dalboy

              If the originals were hard wood then a good replacement possibly be Lignum vitae. They can be sourced from old bowling balls, To buy it now would be very difficult as if I remember Lignum Vitae is on the CITES list they are a very oily wood and will stand up to wear as well as the water you will need to have they turned to a sphere.

              #538670
              Jeff Dayman
              Participant
                @jeffdayman43397

                50 mm wood balls are available on Aliexpress (China import). Search their site for "Wooden balls without bore Dia. 50mm/60mm/70mm/80mm"

                They may have plastic ones too, acetal would be a good material choice if they have the dia you need in acetal, but probably a lot more money than wood balls.

                If you use wood balls I suggest multiple dips in melted wax to seal them, this will have minimal chance of leaching bad chemical pollution into water as varnish/chemical wood sealer might.

                #538672
                DC31k
                Participant
                  @dc31k
                  #538673
                  old mart
                  Participant
                    @oldmart

                    Phenolic resin balls are water resisting and would be a very good choice. The snooker/ pool balls are available in 2" and 2 1/16" diameters, I think they would outlast wood.

                    #538675
                    densleigh
                    Participant
                      @densleigh

                      hi Andrew, Suggestion of old bowling woods is good as only source of lignum wood. problen will be turning it as it is incredibly hard. It is one, if not, the only wood that sinks in water. If you are situated in the south of England they are ususlly found in s/hand shops in fours as flat green bowls, 'up north they are defined as crown green bowls in pairs.

                      Using snooker balls might work but they might be too dense, they also can be quite badly damaged quite easily.

                      As to the seals, I have recently repaired a similar pump (not with a presure reserve) and found a firm based in Crewe who make the leather gaskets and can 'draw' the leather cup for the lift (probably not needed in your case). I might have some 2" snooker balls around as I used to make snooker tables. I can look for you. You might be able to get a set of billiard balls (3) from Peradon & Fletcher, based in Liverpool https://www.peradon.co.uk I no longer trade with this compoany having retired from the sports trade quite a while ago.

                      Aramith snooker balls are considered the best available, made in Belgium, so pricey.

                      If you pm me I can have a look in my stores for you.

                      John.

                      #538676
                      Brian Wood
                      Participant
                        @brianwood45127

                        Andrew,

                        Would squash balls be the right sort of size, they are certainly somewhat softer than snooker balls>

                        Brian

                        Edited By Brian Wood on 08/04/2021 16:11:38

                        #538678
                        Chris Gunn
                        Participant
                          @chrisgunn36534

                          Andrew, how about the plastic balls that are in washing machines? they act as non returns in the waste pipes?

                          Chris Gunn

                          #538679
                          Dave Halford
                          Participant
                            @davehalford22513
                            Posted by Jeff Dayman on 08/04/2021 14:30:25:

                            50 mm wood balls are available on Aliexpress (China import). Search their site for "Wooden balls without bore Dia. 50mm/60mm/70mm/80mm"

                            They may have plastic ones too, acetal would be a good material choice if they have the dia you need in acetal, but probably a lot more money than wood balls.

                            If you use wood balls I suggest multiple dips in melted wax to seal them, this will have minimal chance of leaching bad chemical pollution into water as varnish/chemical wood sealer might.

                            It's probably important to remember that wood expands when waterlogged and also sinks in water.

                            #538681
                            Nigel Graham 2
                            Participant
                              @nigelgraham2

                              Can't help thinking a £3 snooker ball on a rubber seating would be a low-cost, simple but effective option. They would almost certainly be sufficiently spherical, and have a good smooth finish.

                              Lignum Vitae was often used in large steam-ships as a bearing-liner for the propeller shafts, lubricated by the water, so it ought have a goodly long life in well-pump valves. As others say though, even if you could obtain any, you've still the problem of having the balls turned to a suitable sphericity and finish – a problem with turning them from any material.

                              .

                              Actually, non-return ball-valves are made in a range of diameters for cold-water systems, and it may be possible to obtain replacement 50mm dia balls alone. Try asking suppliers of commercial plumbing and swimming-pool fittings: you might not find them in domestic-building suppliers' catalogues.

                              '

                              I'm not clear about two points.

                              1) "Pressurised." A lift pump is not "pressurised" . A lift pump works by suction alone, discharging to atmosphere at its own leveI. Its theoretical suction head is about 32 feet (say 10 metres) but in practice never achieves that. The traditional village-pump with an outlet spout on the top of the pump cylinder, is a lift pump.

                              Am I right this means an air-vessel on the delivery side? That would be appropriate on a power-driven, reciprocating force pump with little or no suction head but a delivery head that may be much more than 10m. It does not increase the pressure or volume pumped, but decreases pulsing in the delivery pipe-work and fittings. The pumps used for hydraulically testing plumbing systems – and miniature steam-boilers – are force pumps; but neither need nor have air-vessels.

                              '

                              2) I assume the gaskets are between flanges holding the pump casing parts together. If so the pressure acts only on their edges exposed to the waters as the bolts take the forces trying to push the pump apart.

                              Given bolting faces in good condition, or re-faced, the gasket does not need to be very thick, and can be cut from almost any gasket material suitable for cold water up to the sort of pressure here. Provided decent widths of gasket between the edges it is sealing, including round the bolt-holes, Neoprene or other synthetic, or natural, rubber, should be fine. What is the original material?

                              So, what are the pressures we need consider? (Pressure alone – the force is pressure X area)?

                              – A lift pump pulling the water up from the tank works only by suction so the maximum pressure acting on any part of it cannot exceed 1 Bar (approx. 15lbs.sq.inch), and is on the outside of the pump.

                              – A force pump down in the tank and pushing the water uphill, experiences an internal pressure that equals 1 bar per 10 metres delivery head.

                              Given that your neighbour's pump is a buried water-tank, it would have to be a pretty deep tank for pressure to be much of a problem.

                              #538682
                              J Hancock
                              Participant
                                @jhancock95746

                                There are many makers of industrial sized diaphragm pumps that will use balls of that size.

                                Wilden, Sandpiper, even worth trying your local plant hire centre for spares.

                                #538683
                                Dave Halford
                                Participant
                                  @davehalford22513

                                  Are we talking about one of these the valve seems to be low energy.

                                  #538686
                                  Dalboy
                                  Participant
                                    @dalboy
                                    Posted by Nigel Graham 2 on 08/04/2021 16:43:45:

                                    Lignum Vitae was often used in large steam-ships as a bearing-liner for the propeller shafts, lubricated by the water, so it ought have a goodly long life in well-pump valves. As others say though, even if you could obtain any, you've still the problem of having the balls turned to a suitable sphericity and finish – a problem with turning them from any material.

                                    Not as difficult as it sounds the two pots are from LV and turned to a couple of spheres getting it right just takes a little time and the use of a template.

                                    dscf1584 (1024x768).jpg

                                    dscf1637 (1024x755).jpg

                                    #538690
                                    Michael Gilligan
                                    Participant
                                      @michaelgilligan61133

                                      I recently posted a link to this ball-turning video : https://youtu.be/fmzD8wI8RIA

                                      Bigger than 2” but a good demonstration.

                                      MichaelG.

                                       

                                      Edited By Michael Gilligan on 08/04/2021 17:18:45

                                      #538744
                                      andrew lyner
                                      Participant
                                        @andrewlyner71257

                                        @Nigel G; "1) "Pressurised." A lift pump is not "pressurised" . A lift pump works by suction alone"

                                        That's the clever bit. The lift section lifts water into a first chamber then the inlet valve closes and the piston moves down and forces water into the second chamber. This chamber is inverted with air at the top which gets pressurised with additional strokes. You can put a tap on the delivery pipe which can use the stored water (as long as the second ball valve doesn't leak

                                        It's a principle that you can see in a number of designs. It avoids the splosh splosh that you and to get with ordinary hand pumps (like my grandparents had as their supply in the 50s)

                                        "2) I assume the gaskets are between flanges holding the pump casing parts together. If so the pressure acts only on their edges exposed to the waters as the bolts take the forces trying to push the pump apart."

                                        It's all very low pressure so the gasket needn't be very strong. As you say, if the faces are reasonably flat, the gasket only needs only to be thick enough to fill the valleys. I will have to go to a bit of trouble with that but the machine is pretty easy on the joints

                                        I'm grateful for all the opinions about replacement balls. I think they may end up as billiard balls. Wood would need to fairly dense so that they balls fall into the cups fast. The old balls are pale 'wood' (?) with no obvious grain but they are just flaking to pieces.

                                        #538746
                                        Nigel Graham 2
                                        Participant
                                          @nigelgraham2

                                          Ah, I see! Thank you! The Splosh-Less Pump…

                                          Do let us know how it progresses!

                                          #538747
                                          andrew lyner
                                          Participant
                                            @andrewlyner71257
                                            Posted by Dave Halford on 08/04/2021 16:54:05:

                                            Are we talking about one of these the valve seems to be low energy.

                                            No, not a Ram Pump; there's no water flow to drive it. It lifts water up from a tank, underground.

                                            #538755
                                            noel shelley
                                            Participant
                                              @noelshelley55608

                                              I know every one is talking about wood, or acetal but I have used 2" stainless balls, but about £35 each. A good bearing supplier will be able to supply. Noel

                                              #538766
                                              Sam Longley 1
                                              Participant
                                                @samlongley1

                                                My pegsun pump had 3 inch rubber balls in it & it was 40years old & still going strong when I sold it. I suspect that rubber would seat better anyway. Perhaps a hard ball as the type one throws for one's dog to chew on might do the trick

                                                #538776
                                                Nigel Graham 2
                                                Participant
                                                  @nigelgraham2

                                                  It's very commonly done by using a hard ball (be it turned from Lignum Vitae , a precision stainless-steel, snooker ball or the dog's toy), or a mushroom type valve, on a rubber seating.

                                                  I think even Hydraulic Ram Pumps, which use a big, heavy iron ball and close literally with a bang, use that; but here we're looking at something gentler in operation.

                                                  #538803
                                                  andrew lyner
                                                  Participant
                                                    @andrewlyner71257
                                                    Posted by Dick H on 08/04/2021 13:44:45:

                                                    Probably fiendishly expensive but you could give this lot a ring: (the Precision Plastic Ball Co.) – https://theppb.co.uk/.

                                                    These guys are much more reasonable than I expected. A quick email to them gave the response

                                                    "We have 50mm diameter nitrile rubber balls (density 1.2g/cc) 70 Shore A @ £7.20 each
                                                    Otherwise 50mm diameter Natural Rubber (1.6g/cc) 65A @ £3.00 each" (Plus VAT and p/p, of course)

                                                    I was all fired up to go for that Then I tried the dog's ball idea and found just the thing. If they are no good then someone's dog will have a lucky day!

                                                    pub.co.uk could be useful later as they are not silly expensive.

                                                    Cheers

                                                    Andrew

                                                    #538833
                                                    Neil Wyatt
                                                    Moderator
                                                      @neilwyatt

                                                      The original balls have lasted sixty years… doesn't that suggest that wooden balls might be good replacements that also won't harm the valve seats?

                                                      Neil

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