Foot valves with pressure up to 16 bar for non-return protection for pumps
Foot valves with pressure up to 16 bar for non-return protection for pumps. Also available as multi-cone valve with flanges for pipe inside diameters from DN150 to DN 1000.
Our technical features of the foot valves
The foot valves of Lasso Technik AG are equipped with a membrane to prevent the back flow of liquids and gases. When the membrane is closed, the noise level is low and water hammer is avoided. The valve guarantees a safe closure even in the case of granular liquids (sandy water). In addition, our foot valves act as raw filters to protect pumps and systems. We guarantee a long product life due to the absence of mechanical or electronic moving parts subject to wear and tear.
Foot valves - Technical data
- Temperature ranges: -20° to +200°C (no steam)
- Flow velocity: (Fluids) 2.5 m/sec.
- Flow velocity: (gases) 15 m/sec
- Nominal size: from DN 20 to DN 600
- Aqueous, oily, acidic and basic liquids
- Nominal pressure: up to 16 bar
Efficient production of coldness with minimal pressure loss
Producing coldness with river water is efficient and economical.
Large quantities of river water must flow through the heat exchanger. Due to these large volumes, it is important to keep the system pressure loss to a minimum in order to maintain high efficiency. The layout of the system and the selection of its various components are an important element when low resistance is required. The Stop Silent multi-cone valve has been designed according to these flows in order to be best adapted to them.
Technical figures of this model
| System data | |
|---|---|
| Pressure | 3 bar (44 psi) |
| Temperature | 5-28°C (41°F up to 82°F) |
| Speed | 875 l/sec (13’860 GPM) |
| o Fluid | River water |
| The chosen solution: | |
| Valve type | MKV Multicone Check Valve |
| Dimension | DN 600 (Ø 24”) |
| Flange | DIN PN 10 (about ANSI 150) |
| Result: | |
| Pressure drop | 0.09 bar (13 psi) |
| Lorem | Lipsum |
A valve to prevent backflow of liquid and gaseous media.
- The reliability of the membrane seal is very high
- Perfect sealing even with granular pollutants (sand)
- A silent and delicate closing (no water hammer)
- Low opening pressure
- No mechanical parts moving, wear-sensitive parts (low maintenance)
- Farm in environments where mechanical valves would no longer work (glucose, chocolate)
- Simple and cost-effective installation
- Good resistance to chemical elements, anticorrosive
- Also serves as a raw filter (protects pumps and equipment)
- Ensures correct flow measurement (no incorrect measurement due to backflow)
- Possibility of installation in many positions
Multi-cone valve - valve body with flanges
From DN 150 to DN1000, welded product resistant to high flow rates. The valve bodies are hot-dip galvanized or coated. The valve cones are made of stainless steel
Diaphragm materials of the foot valves
The Stop Silent foot valves have a diaphragm made of approved materials depending on the application.
Foot valves with silicone diaphragm VMQ:
- For the food industry and drinking water
- Cold resistance down to approx. -60°C
- Hot air temperatures up to +210°C
- Water temperature up to 100°C
Foot valves with ethylene-propylene-diene rubber diaphragm EPDM:
- For hot and cold water
- Suitable for steam sterilization for short periods of time
Foot valves with nitrile rubber diaphragm NBR:
- for solar technology
- for thermal cogeneration plants
- for petrochemistry
Foot valves with a Viton® fluorocarbon membrane:
- For chemical industry
- Acid resistant
- Temperature resistant -20 to +220 °C
Foot valves with a fluorosilicone membrane FVMQ:
- High or low temperature resistant
- Weather resistant
- Ozone resistant
- Unalterable over time
Installation examples of the foot valves
The membrane is fixed in the perforated support cone and its sealing lip rests on the inner surface of the cone. As the pressure increases, the membrane deforms and allows the fluid to flow. When the pressure drops, the diaphragm returns to its initial position and closes the valve.
Foot valve AS NU - DN 25 to DN 100
- for sanitary and industrial fittings
- for small flange diameters
- with O-ring on the outside of the flange
Foot valve AS 41 - DN 25 to DN 200
- for standard fittings
- for mounting in flat-sealing unions
Foot valve AS 54 - DN 40 to DN 200
- for retrofitting
- without structural changes
- fast and cheap
Foot valve SFL Flange - DN 40 to DN 200
- hot-dip galvanized, powder-coated or stainless steel
- for flange valves from 40 to 200mm
Foot valve MKV multi-cone - DN 150 to DN 600
- for pipe diameters from 150 to 600mm
- powder coated or stainless steel
- as welded construction
Foot valves - Applications
The foot valves of Lasso Technik AG have a wide application spectrum
- Chemical industry
- food industry
- petrochemistry
- process engineering
- irrigations
- water treatment
- waterworks
- groundwater pumps
- heating installations
- sanitary facilities
- fire protection systems
- solar technology
Further areas of application for our foot valves
- pumping stations
- water supply
- house installation
- cooling water systems
Manufacturer, dealer, service provider
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Daniel Rohrer
CEO - Lasso Technik AG
CEO - Lasso Technik AG