Overview
The STEINLE pump is a single or double acting piston diaphragm pump with a hose as the diaphragm. The liquid transferred to the filter press requires exceptionally high performance pumps. They have to supply large quantities of liquid into the empty press as well as small quantities at high pressure when the filter press is filled. This pressure must be maintained for a long period of time.
The pumps are available in FP & FH series with different pressure transmission:
- FP - 1 : 2.4
- FH - 1 : 3.3
Features & benefits
Self-regulating for filter press applications
By using compressed air to operate the pump, the pump follows the filtration curve automatically. There is no need for speed reduction of electric motors.
High pressure transmission up to 1 : 3.3
By using different sizes of pneumatic pistons the pumps reach 24 bar in the filter press, even with low pressure of compessed air.
Low air consumption
Due to the piston and cylinder construction with very small dead volumes the compressed air is used very efficiently. Ther is almost no air consumption in the high pressure operation.
Lifetime
Low velocity of the slurries around the valve balls reduce wear in this area.
Dry running capability
Sealless design and no rotating parts the pump can run dry for a long time without being damaged.
External electronic air valve
The electronic control of the external air valve guarantees a safe operation without dead point of the air valve.
Long life time of diaphragms
By using tubular diaphragms which are not pressure balanced the stress is reduced to minimum.
Solid construction for heavy duties
The pump has a flanged construction. No clamps, robust design.
The installation
All STEINLE pumps are self-regulating. This means, that no additional equipment is required. When the filter press is full, the pump just stops. For the single acting pump size 25 a pulsation dampener in the discharge pipe is recommended.
Wide range of applications
Automotive Industry
Filter Press Applications
Chemical and Paper Industry
Porcelain, Glass and Ceramics
Technical data
Dimensions
| Dim | FP/FH 25 | FP/FH 40 | FP/FH 50 | FP/FH 80 |
| A | 780 / 30.70 | 941/ 37.05 | 1445 / 56.89 | 1445 / 56.89 |
| B | 730 / 28.74 | 1001 / 39.41 | 1525 / 60.04 | 1525 / 60.04 |
| C | 380 / 14.96 | 380 / 14.96 | 480 / 18.90 | 480 / 18.90 |
| D | 440 / 17.32 | 440 / 17.32 | 540 / 21.26 | 540 / 21.26 |
| E | 1234 / 48.58 | 1234 / 48.58 | 1787 / 70.35 | 1804 / 71.02 |
| F | 1159 / 45.63 | 1159 / 45.63 | 1704 / 67.09 | 1704 / 67.09 |
| G | 1183 / 46.57 | 1183 / 46.57 | 1735 / 68.31 | 1749 / 68.86 |
| H | 102 / 4.02 | 102 / 4.02 | 112 / 4.41 | 144 / 5.67 |
| I | 806 / 31.73 | 806 / 31.73 | 860 / 33.86 | 860 / 33.86 |
| J | 249 / 9.80 | 249 / 9.80 | 273 / 10.75 | 273 / 10.75 |
| M | 133 / 5.24 | 133 / 5.24 | 196 / 7.72 | 196 / 7.72 |
| DN | 40 / 1.57 | 40 / 1.57 | 50 / 1.97 | 80 / 3.15 |
Dimensions in mm (where other is not indicated)
Dimensions in inch (where other is not indicated)
Technical data
| Data | Pump size |
| FP/FH 25 | FP/FH 40 | FP/FH 50 | FP/FH 80 |
| Max capacity [m3/h] / [US gpm] | 2.5 / 11 | 7 / 31 | 14 / 62 | 18 / 79 |
| Max discharge pressure [bar) / [psi] | 16 / 232 (FP) ; 24 / 348 (FH) |
| Pressure transmission | 1 : 2.4 (FP) ; 1 : 3.3 (FH) |
| Max air pressure [bar] / [psi] | 8 / 116 |
| Displacement* [l] / [cu in] | 0.7 / 42.7 | 2 / 122 |
| Max suction lift dry [m] / [Ft] | 2 / 6.6 |
| Max suction lift wet [m] / [Ft] | 5 / 16.4 |
| Medium operating temperature [°C] / [°F] | -20 - 80 / -4 – 176 |
| Allowable ambient temp range [°C] / [°F] | 0°C - 40 / 32 - 104 |
| Control power | 12 W required |
| Protection class | IP 65 |
| Max size of solids ø in [mm] / [in] | 10 / 0.39 | 15 / 0.59 |
| Weight [kg] / [lb] | 62 / 28 | 90 / 41 | 162 / 74 | 188 / 85 |
| Housing material | Mild Steel, SS 316, Polypropylene (up to 16 bar) |
| Valve balls | Steel cored CR, NBR, Polyurethane, EPDM, PTFE, SS 316, PP, PE1000 |
| Sealing (wetted) | NBR |
| Sealing (pneumatic) | PUR/NBR |
| Diaphragms | Superflex, PUR |
| Hydraulic liquid | Biological degradeble |
* = each chamber
Working principle
Working principle
Compressed air is moving the pneumatic piston which is attached to the hydraulic piston.
The hydraulic piston is moving the hydraulic liquid which is acting on the diaphragm hose which also restores its original shape.
While the hose is compressed, the slurry inside is displaced and flows out.
Ball valves on the top and bottom of the hose ensure that the flow is in one direction only.
a) open b) compressed
The two extreme deformation conditions of the hose.
Accessories
In addition to the pumps, wide range of useful accessories are available:
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 device
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.
