Check valves from the manufacturer up to 16 bar for liquid and gaseous media with rubber diaphragms made of EPDM, silicones, fluorosilicones, nitrile, NBR, fluorocarbon, Viton® and fluorosilicones.
Technical features of our check valves
Lasso Technik AG check valves are equipped with an elastomer diaphragm that prevents the back flow of liquid and gaseous fluids. The particularity of this membrane is its silent and gentle closing (without water hammer). The non-return valve provides a high and reliable diaphragm seal, even in the presence of granulated fluids (sandy water). In addition, our check valves act as a raw filter and protect pumps and systems. Our devices do not contain any mechanical or electronic moving parts likely to wear out, which guarantees a long service life.
Stop Silent check valves are equipped with a diaphragm made of materials that are defined according to its application.
Silicone membrane check valves (VMQ) for drinking water and food industry can be used at air temperatures up to +210°C, and water temperatures up to +100°C with a cold resistance up to about -55°C / -60°C.
Non-return valves with ethylene propylene diene (EPDM) rubber membranes for cold and hot water, also suitable for short periods under steam for food sterilization.
Nitrile rubber diaphragm check valves (NBR) for use in the petrochemical industry, solar technology and thermal coupling pumping systems.
Viton® fluorocarbon diaphragm check valves for applications in the chemical industry. Has good resistance to acids and excellent resistance to low and high temperatures from -20°C to +220°C.
Fluorosilicone membrane check valves (FVMQ) have very high heat and cold resistance and excellent resistance to weathering, ageing and ozone.
Installation examples of non-return valves
Simple and quick assembly of the non-return valve, the diaphragm is fixed in the perforated support cone and its sealing lips are placed on the inside surface of the cone. When the pressure increases in the direction of flow, the diaphragm deforms and allows the fluid to pass through. If the flow rate is reduced, the diaphragm returns to its initial position and closes the valve.
Check valve AS NU - DN 25 to DN 100
The AS NU check valve with minimum diameter flange designed to be mounted in a body, calibrated for installation in industrial and sanitary fittings. Sealing is achieved by a seal placed between the body and the edge of the flange.
Check valve AS 41 - DN 25 to DN 200
The AS 41 check valve is used, among other things, in standard flat-sealing screw connections.
Check valve AS 54 - DN 40 to DN 200
The AS 54 check valve is a quick and inexpensive solution that can be retrofitted without modifying the structure that houses the system
Check valve SFL Flange - DN 40 to DN 200
The SFL check valve with flange is installed in flange bodies with a diameter between 40 mm and 200 mm. The valve is supplied hot-dip galvanized with Rilsan or stainless steel coating.
Check valve MKV multiple plug - DN 150 to DN 600
The MKV multi-cone check valve is installed from 150 mm to 600 mm in diameter and is supplied with stainless steel or Rilsan coating. These valves can also be made entirely of stainless steel.
Check Valves - Applications
Our non-return valves from Lasso Technik AG have a wide range of applications
fire protection systems
Further areas of application for our non-return valves
In addition, our check valves are used in domestic water installations, water supply, pumping stations, cooling water systems and installation in flanges.
Manufacturer, dealer, service provider
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