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 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 2 Joseph Evans Wall pumps:
- 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 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 in June 2006, restored and successfully run on compressed air in March 2007.
Watch video (6.3MB 10s)
:Running
on Compressed Air - Left View Running Slowly
Watch video (6.4MB 10s)
:Running
on Compressed Air - Right View Running at Speed
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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 June 2006 and is awaiting restoration.
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