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High & Medium pressure pumps D40 pages
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| General Description Positive constant displacement, rotary, three screw pump. Flow rate per revolution 9.8 - 307 cm3 in 14 steps. The three screws, the central driven screw - the power rotor -which meshes with the two sealing screws - the idler rotors -are the only rotating components ot the pump. The axial pressure and friction loads on the pump rotors are hydraulically balanced. The power rotor is positioned axially by the selfcompensated thrust washer arrangement, being part of the hydraulic balancing system of the power rotor. The pump accommodates mechanical shaft seals complying with the DIN 24960 Standard. The D4 pump is available in the tollowing models: • D4 xxBE flange mounting pump with radial inlet for horizontal or vertical mounting. • D4 xxBP as D4 xxBE with built-in pressure reliet valve for pump external or internal return. • D4 xxTE flange mounting pump with built-on inlet strainer for tank-top mounting for shallow tank operation. • D4 xxJE as D4 xxTE with extended inlet pipe for deep tank operation. | ||||||||||||||||||||||||||||||||
| Model Code Series | ||||||||||||||||||||||||||||||||
| D I 4 | ||||||||||||||||||||||||||||||||
| A | ||||||||||||||||||||||||||||||||
| 2 | ||||||||||||||||||||||||||||||||
| Size | (Power rotor outer diameter) | |||||||||||||||||||||||||||||||
| 025-032-038-045-052-060-070 Rotor lead | ||||||||||||||||||||||||||||||||
| L K = Low lead N = Normal lead Design Modification | (L = size 025-032; K = size 038-070) | |||||||||||||||||||||||||||||||
| 2 = the second version Material in pump casing | ||||||||||||||||||||||||||||||||
| L = Aluminium I = Cast iron Shaft seal design | ||||||||||||||||||||||||||||||||
| V = Carbon/Ni-resist, Elastomers in Viton T = Carbide/Carbide, Elastomers in Viton Mounting | ||||||||||||||||||||||||||||||||
| B = Flange mounting J = For vertical tank mounting; with prolonged inlet pipe. strainer included T = For vertical tank mounting; with mounted strainer Valves | ||||||||||||||||||||||||||||||||
| E = Without valve P = Valve with external return or internal return (max 4 MPa) Special design | ||||||||||||||||||||||||||||||||
| A056 = Ball bearing version A070 = HydrauIic drive A101 = Counter Clockwise rotation | ||||||||||||||||||||||||||||||||
| co U S T— T— | ||||||||||||||||||||||||||||||||
