STEINLE Filter Press Pumps
STEINLE pumps are double-acting, piston-diaphragm pumps with a flexible hose instead of a diaphragm. Pumping liquids into a filter press requires extremely high-performance pumps.
These pumps must deliver large quantities of liquid to the empty press, as well as small quantities at high pressure when the press is full. The liquid pressure must be maintained for a long time.
The pumps are available in FP & FH series with different pressure transmission:
FAST FACTS
FEATURES AND BENEFITS
STEINLE pumps are double-acting, piston-diaphragm pumps with a flexible hose instead of a diaphragm. Pumping liquids into a filter press requires extremely high-performance pumps.
These pumps must deliver large quantities of liquid to the empty press, as well as small quantities at high pressure when the press is full. The liquid pressure must be maintained for a long time.
The pumps are available in FP & FH series with different pressure transmission:
| Pump capacity: | 18 m3/h (300 l/min) | |
| Max. discharge pressure: | 24 bares | |
| Max. suction height: | 2-5 meters | |
| Max. particle size: | 10-15 mm | |
| Temperature: | 80 °C | |
| Body construction materials: | Mild steel, SS 316, PP | |
| Membrane construction materials: | Superflex, PUR | |
| Valve ball construction materials: | CR with steel core, NBR, PU, EPDM, PTFE, SS 316, PP, PE1000 | |
| Sealing: | NBR, PUR/NBR | |
| Available sizes: | |
| Model | Max. flow rate (l/min) |
| FP 25/FH 25 | 41 |
| FP 40/FH 40 | 116 |
| FP 50/FH 50 | 233 |
| FP 80/FH 80 | 300 |
![]() |
![]() |
![]() |
![]() |
| Automobile industry | Chemical and Paper Industry | Filter press application | Porcelain, glass and ceramics |
Compressed air moves a pneumatic piston, which is connected to a hydraulic piston.
The hydraulic piston moves hydraulic fluid, which acts on a membrane hose, which also returns to its original shape.
When the hose is squeezed, the suspension inside is displaced and flows out.
Ball valves at the top and bottom of the hose ensure flow in only one direction.
The two extreme deformation conditions of the hose.
![]() |
![]() |
| Pulsation dampener Cost worthy pulsation dampeners with 9 liters volume and an operating pressure of 16 bar are suitable for all pump sizes. |
Air treatment system The installation of an air treatment system in the air supply is always recommended. They consist of a water separator, filter, oil dosing unit and pressure regulator with pressure gauge. |
![]() |
![]() |
| Diaphragm control This electronic unit checks the hydraulic liquid conductivity which changes when it is contaminated with the transfered slurry. A signal is generated when diaphragm is raptured or untight. This unit can be installed even when the pump is in operation. |
Filling control of the filter press By controlling the stroke frequency of the pump the level of filling in the filter press can be determinated. This can be done by an existing control unit or by a separate time control box. |
All STEINLE pumps are self-regulating. This means that no additional equipment is required. When the filter press is full, the pump simply stops. For single-acting pumps in size 25, it is recommended to use a pulsation dampener in the delivery pipe.
| Pump capacity: | 18 m3/h (300 l/min) | |
| Max. discharge pressure: | 24 bares | |
| Max. suction height: | 2-5 meters | |
| Max. particle size: | 10-15 mm | |
| Temperature: | 80 °C | |
| Body construction materials: | Mild steel, SS 316, PP | |
| Membrane construction materials: | Superflex, PUR | |
| Valve ball construction materials: | CR with steel core, NBR, PU, EPDM, PTFE, SS 316, PP, PE1000 | |
| Sealing: | NBR, PUR/NBR | |
| Available sizes: | |
| Model | Max. flow rate (l/min) |
| FP 25/FH 25 | 41 |
| FP 40/FH 40 | 116 |
| FP 50/FH 50 | 233 |
| FP 80/FH 80 | 300 |