Source
Joseph Evans & Sons, Pump Makers, Wolverhampton, England.
Catalogue"A" Steam & Air-Operated Pumps, July 1947 Edition issued to and obtained from the now closed Beckton Gas Works, North Thames Gas Board.
Description
These wall mounted donkey pumps are specially designed for boiler feeding. The fly-wheel is placed at the back out of harms way and provision is made for mounting the pump at top and bottom. The connecting rod is of a 2 to 1 steam proportion and is adjusted at either end by a single cotter.
Construction
The cast iron barrel and valve boxes are cast integral with the main frame in which are fitted the shaft bearings. Suction and delivery valves are of gunmetal, wing type, operating in gunmetal seats and are accessible through doorways in the main frame. The ram is made of gunmetal screwed to the kite, the crankpin brasses and kite pin brasses are adjustable by means of a single cotter. The delivery pipes can be fitted either side of the pump. A handle can be fitted on the crank pin for hand operation when steam is not available. When these pumps were used with gas liquor, an iron-fitted pump end was provided.
Range
There are two variants the 700 and 702 range. The 700 is a single acting plunger pump and the 702 has a double acting bucket pump arrangement.
| 700 Single-Acting | 702 Double-Acting | ||||
|
Size SteamxPumpxStroke |
Gallons / hour (water) |
Max Flywheel Speed (R.P.M.) |
Size SteamxPumpxStroke |
Gallons / hour (water) |
Max Flywheel Speed (R.P.M.) |
| 2"x1"x2" | 50 | 150 | 3"x1½"x3" | 300 | 130 |
| 2½"x1¼"x2½" | 90 | 136 | 4"x2"x4" | 570 | 105 |
| 3"x1½"x3" | 150 | 130 | 5"x2½"x5" | 1020 | 96 |
| 4"x2"x4" | 285 | 105 | 5x"3"x5" | 1460 | 96 |
| 5"x2½"x5" | 510 | 96 | 6"x3½"x6" | 2240 | 90 |
| 5x"3"x5" | 730 | 96 | 6"x4"x6" | 2930 | 90 |
| 6"x3½"x6" | 1120 | 90 | - | - | - |
| 6"x4"x6" | 1460 | 90 | - | - | - |
Collection
There are four Joseph Evans Wall Mounted steam pumps in the collection.
- Single-acting wall 2x1x2, No.14897, 1911, Unknown
- Single-acting wall 2½x1¼x2½, No.30395, 1935, Unknown
- Single-acting wall 2½x1¼x2½, No.33470, 1945, Salamon's Tar Works
- Double-acting wall 3x1½x3, No.56/53953, 1956, Beckton Gas Works
Single-acting wall 2x1x2, No.14897, 1911, Unknown.
Size: 2" steam cylinder, 1" pumping cylinder with 2" stroke.
Series: 700 single-acting, bronze fitted.
This pump was purchased from a collector in Minster, Kent in March 2019 and is the smallest pump made by Evans in this range. The diameter of the flywheel being only 10". Unfortunately no previous history is known.
The pump had been regularly run on steam and was complete and in good working order. It required a slight tweak to the valve rod clearance to allow for running on air rather than steam, otherwise it runs very well. The crankshaft bearings appear to be fine but there is some knocking to the big end bearings and ideally new ones should be made.
Single-acting wall 2½x1¼x2½, No.30395, 1935, Unknown.
Size: 2½" steam cylinders, 1¼" pumping cylinders with 2½" stroke.
Series: 700 single-acting, bronze fitted.
This pump was purchased from a collector in Boston, Lincolnshire in November 2019. It is complete although initially very stiff from lack of use; its previous history is unknown. It is an identically sized pump to No. 33470, but is bronze fitted and has the facility for hand operation with a handle fitted to the end of the crankshaft. It has been completely stripped, cleaned and repainted. The two crankshaft bearings appeared to be satisfactory but the con rod bearings were well worn so a new pair have been made from cored phosphor bronze, grade SAE 660. The existing cast iron piston rings have been replaced with suitably sized rounds of graphite lubricated packing, the steam valve refaced, a new valve rod made from mild steel, the bronze eccentric strap re-machined and fitted with a bespoke distance piece to take up the wear. The front crankshaft bearing was found to be worn too so it has been carefully machined to eliminate the wear and reduce the knock. Upon testing on air the pump now runs very well; in the long term the crankshaft bearings will need to be either renewed or white metalled and re-machined to size.
Single-acting wall 2½x1¼x2½, No.33470, 1945, Salamon's Tar Works
Size: 2½" steam cylinders, 1¼" pumping cylinders with 2½" stroke.
Series: 700 single-acting, iron fitted.
This pump was used to transfer refined tar at Salamon's Tar works at Ferry Lane, Rainham in Essex until closure in the late 1960s.
The pump was originally saved by Jim Newnham, purchased by me in June 2006, restored and successfully run on compressed air in March 2007.
Video (6.3MB 10s) :Running on Compressed
Air - Left View Running Slowly
Video (6.4MB 10s) :Running on Compressed
Air - Right View Running at Speed
Double-acting wall 3x1½x3, No.56/53953, 1956, Beckton Gas Works
Size: 3" steam cylinders, 1½" pumping cylinders with 3" stroke.
Series: 702 double-acting, iron fitted.
The pump was originally installed in the foreshore pump house, at Beckton Gas Works and used for pumping refined coal tar. The pump was saved by Jim Newnham, following closure of the works in the late 1960s.
It was purchased in 2006 and has been fully restored and runs well on air.
