The pump is composed of two sets of opposed screws. During pump operation, the screws on the two shafts are engaged and form a sealed cavity with the surrounding pump casing. The pumped liquid is shifted axially as the screw shafts turn and steadily and constantly convey the liquid to the center of the pump where the discharge port is located. Since hydraulic forces on two screws are opposite and equal, the hydraulic axial stress on shafts is automatically balanced.
Main industries and applications：
Twin Screw Pumps are offered with a double-suction design configuration. Twin screw pumps with timing gear (FPDS4) transmissions are perfectly suited for transferring low-lubricity fluids, or even abrasive medium.
The FPDS4 pump series offers no metal contact between the hydraulic components and automatic axial balancing.
FPDS4 Series pumps can be applied in a variety of different operating conditions with fluids that include, but are not limited to:
corrosive and non-corrosive, low or high viscosities, clean or abrasive.
Features and Benefits：
• No fluid agitation； • Overload protection； • Nearly pulsation-free； • Increased reliability； • Direct drive； • Low noise； • No emulsified shear； • Suitable for a wide range of viscositie.
Applications：
• Petroleum； • Petrochemical； • Refineries； • Chemicals； • Shipping； • Oil terminals； • Storage and transportation； • Food and beverage； • Lubricating oil.
Technical Data：
• Pump Casing: Cast iron/ductile iron/cast steel/cast stainless steel;
• Shaft: Alloy steel/stainless steel;
• Screws: Ductile iron/alloy steel/stainless steel;
• Bearing Housing: Grey cast iron;
• Pump Nozzle Flange: GB/DIN/ANSI;
• Flange: DN50-DN600.
| Capacity | Diff.Pressure | Viscosity | Max.Temperature | |||
| m³/h | gpm | bar | psi | m㎡/s(cSt) | °C | °F |
| 1-5,000 | 4.4-22,000 | 150 | 2175 | 0.3-200,000 | 500 | 932 |
