Type TW 11470
Hydraulic pump for water



The high pressure Type TW hydraulic pump is specifically designed for water applications. Since water is the most demanding fluid, the Type TW pump can also be used with most other fluids including water-based solutions and oil-based fluids. Separation of the lubricating oil and the pumped fluid is achieved by the installation of a cavity between the cylinder block and the case. Bypass from the pistons is collected in this cavity and returned to the inlet side of the pump.

The 316 stainless steel pump has three ceramic pistons. The standard pump is suitable for intermittent operation, while a water-cooled version is designed for continuous running. Additional variations are possible by varying the input speed to a maximum of 1,800rpm (1,000 bar).
The water-cooled version of the TW pump

This pump conforms to Directive 94/9/EC relating to equipment intended for use in potentially explosive atmospheres and is ATEX (ATmosphere EXplosible) certified.
Marshalsea Hydraulics has been assessed by SGS Société Générale de Surveillance SA and certified as meeting the requirements of ISO 9001:2000 for the design, development, manufacture and servicing of hydraulic pumps, relief valves and intensifiers.

Pressure and flow combinations

 
Pump No.		 No. of pistons
and size (ins)		 Theoretical
flow (cc/rev)		 Max pres. (bar) Water cooled
11470 – 51CC 3 x 0.375 x 1/3 1.17 1,000  
11470 – 52CC 3 x 0.437 x 1/3 1.59 0,850  
11470 – 53CC 3 x 0.500 x 1/3 2.08 0,690  
11470 – 61CC 3 x 0.375 x 2/3 2.30 1,000  
11470 – 62CC 3 x 0.437 x 2/3 3.20 0,850  
11470 – 63CC 3 x 0.500 x 2/3 4.16 0,690  
11470 – 51CC 3 x 0.375 x 1/3 1.17 1,000
11470 – 52CC 3 x 0.437 x 1/3 1.59 0,850
11470 – 53CC 3 x 0.500 x 1/3 2.08 0,690
11470 – 61CC 3 x 0.375 x 2/3 2.30 1,000
11470 – 62CC 3 x 0.437 x 2/3 3.20 0,850
11470 – 63CC 3 x 0.500 x 2/3 4.16 0,690
11480 – 51CC 6 x 0.375 x 1/3 2.34 0,690  
11480 – 52CC 6 x 0.437 x 1/3 3.18 0,690  
11480 – 53CC 6 x 0.500 x 1/3 4.16 0,690  
11480 – 61CC 6 x 0.375 x 2/3 4.60 0,690  
11480 – 62CC 6 x 0.437 x 2/3 6.40 0,690  
11480 – 63CC 6 x 0.500 x 2/3 8.32 0,690  
11480 – 51CC 6 x 0.375 x 1/3 2.34 0,690
11480 – 52CC 6 x 0.437 x 1/3 3.18 0,690
11480 – 53CC 6 x 0.500 x 1/3 4.16 0,690
11480 – 61CC 6 x 0.375 x 2/3 4.60 0,690
11480 – 62CC 6 x 0.437 x 2/3 6.40 0,690
11480 – 63CC 6 x 0.500 x 2/3 8.32 0,690


Installation

Rotation is bi-directional and the pump may be mounted horizontally or vertically. If vertical mounting is selected, our Technical Department should be consulted.

A suction filter of at least 55 microns should be used, and care should be taken to ensure that the filter is of adequate size and does not cause more than 300 mm Hg depression.
Pipes should be of sufficient size to give not more than 3.70 m/sec velocity in the delivery line and 1.20 m/sec in the suction line.

The suction line should be kept under positive pressure when the pump is stationary to allow priming.

We recommend that the fluid reservoir should be between 50 mm and 3 m above the suction port.

Material
316 stainless steel wetted parts; ceramic pistons; cast iron casing. Weight 47 Kg.