1. First, use
Suitable for the delivery of fuel oils, lubricating oils, hydraulic oils, or other lubricious liquids. The medium to be transported must not contain any abrasive particles or substances that corrode the pump material.
2. the main application area
1. SPF series pumps are used in fuel systems as fuel pumps for conveying, boosting and fuel oil burners;
2. Used as a transmission and fuel pump in the oil system;
3. Can be used as a lubricant pump in all industrial fields;
4. Hydraulic pumps used in various hydraulic transmissions;
3. the structure
The SPF pump is a self-priming three-screw pump with a built-in bearing. The hardened screw is mounted in a replaceable bushing. The main rod adopts hydraulic balance and is supported on the rear cover by the axial force of the rod, and is driven by the hydraulic pressure to rotate. Therefore, the screw profile only transmits hydraulic torque and is free from force and wear. For all transmission parts, Both are lubricated by the transported medium.
The main rod is radially positioned by the balance piston, and the high pressure chamber and the seal chamber are separated by the gap between the balance piston and the sleeve. The mechanical seal is installed in the seal chamber. The oil return hole in the chamber communicates with the suction chamber of the pump. Therefore, it is not affected by the discharge pressure.
The pump is connected and driven by brackets, couplings and motors (eg size 20) or wall mounted (eg size 40).
When the helicoidal active screw, which consists of a special profile, rotates, its dynamic seal chamber will suck liquid from the suction inlet and deliver it to the discharge port in a continuous, pulseless manner in the axial direction.
2. Noise, pulsation
The structure and running stability of the screw pump ensure the pump's low noise and no pulsation.
3. shaft seal
The pump uses a mechanical seal that requires no maintenance.
Dynamic Ring Impregnated Graphite
Static Ring High Carbon Chrome Steel
"O" ring Fluorine rubber
Spring stainless steel
Metal components Stainless steel
4. temperature and pressure range
Allowed temperature 150 °C (only type 20 is supplied)
Allowable working pressure 1.0 MPa
For higher usage temperature, please consult factory
Different working pressures at different viscosities and speeds, according to the performance parameters table.
5. Safety valve
Each pump is equipped with a safety valve as an overload protection device.
6. Import and export flange
Import flange: PN16DIN2533 (GB2555-81)
Outlet flange: PN40DIN2535 (GB2555-81)
The SPF pump can be installed anywhere. For reasons of safety, the motor must not be placed under the pump.
8. Power Package
Various types of motors or other drives are coupled to the pump via couplings.
Three-phase AC motors with protection class IP44, insulation class B, power and main connection dimensions according to Y series
The motor's specified frequency is 50Hz. If no other changes are made, it can be used with a 60Hz power supply.
5. type code
SPF 20 R 38 G 10 F W2
1 2 3 4 5 6 7 8
The theoretical flow rate of the pump at a rotational speed of 1450 rpm and a helix angle of 46°
3 Spinning of the main rod (R=right-handed, L=left-handed)
4 helix angle
5 bearing type: built-in sliding bearings
6 Mechanical seal
7 with filter (only 20 specifications)
8 Material Combination